Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-08-23T14:27:46Z No. of bitstreams: 1 2011 - Jos? Ant?nio Monte.pdf: 1144390 bytes, checksum: 831746c40c4d98b1c97c23c831d74f7c (MD5) / Made available in DSpace on 2016-08-23T14:27:46Z (GMT). No. of bitstreams: 1 2011 - Jos? Ant?nio Monte.pdf: 1144390 bytes, checksum: 831746c40c4d98b1c97c23c831d74f7c (MD5) Previous issue date: 2011-02-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The irrigation regime for ?in natura? tomato cultivation was studied at the experimental area of the Horticulture sector of the Crop Science Department of the Universidade Federal Rural do Rio de Janeiro, located at Serop?dica-RJ. The first experiment was realized to evaluate the effect of the water lamina (40, 60, 80, 100 e 120% of ETc) on biomass and foliar area accumulation, to obtain growth parameters for a growth analysis and production of the culture, for Debora plus hybrid, a long life type. In the second essay, the influence of the irrigation schedules (TR0 every day; TR1 every two days; TR2 every three days; and TR3 every four days) was investigated, by the growth analysis and production of the same hybrid. In the third experiment, the growth and production was studied for three genotypes (Debora plus hybrid, a long life type; Carmem hybrid; and the variety Santa Clara), all for in natura use, all under the same irrigation regime. The results obtained in the first experiment demonstrated that the maximal biomass accumulation occurs between 70 and 80 days after transplanting, for all treatments. The quantity of water applied above 80% of ETc resulted in higher vegetative growth and general production, but with the same commercial production as for the others treatments. Above 80% of th Etc, there was an augmentation of defective fruits, with a higher input for the culture, using more water and energy, without an augmentation of commercial fruits of tomato. In the second essay, there was no difference among the irrigation schedules and, therefore, the longer schedule of every four days had the same fruit quality as the others schedules. The third experiment showed differences for the growth pattern and water and nutrient requirements of the genotypes. The quantity of water used by the Carmem hybrid was lower than for Debora hybrid, which indicated the necessity of detailed studies with different irrigation strategies for each genotype of tomato. Therefore, for an optimization of inputs use for the ?regulated deficit irrigation?, the irrigation management needs to be adequate to the different requirement, during the cycle, of each genotype / Estudou-se o manejo de irriga??o na cultura do tomateiro para mesa, na ?rea experimental pertencente ao Setor de Horticultura, do Departamento de Fitotecnia na Universidade Federal Rural do Rio de Janeiro, localizada no Munic?pio de Serop?dica-RJ, em tr?s experimentos de campo com o objetivo de foi estudar o desenvolvimento da cultura do tomateiro em rela??o ? capacidade de produ??o de fitomassa e a de frutos, em diferentes formas de aplica??o de ?gua atrav?s da irriga??o. Buscando maior efici?ncia no uso da de ?gua de irriga??o, com produ??o de tomate de qualidade vi?vel economicamente para o produtor e sustent?vel para o meio ambiente. O primeiro experimento foi realizado para avaliar a influ?ncia da l?mina de irriga??o 40, 60, 80, 100 e 120% da evapotranspira??o (ETc) da cultura na do tomateiro na acumula??o de fitomassa e ?rea foliar, e obten??o de ?ndices fisiol?gicos, para uma an?lise de crescimento da cultura e produ??o de frutos, do tomateiro h?brido D?bora plus, tipo longa vida. O segundo experimento foi conduzido para avaliar a influ?ncia do turno de rega (TR1 turno de rega di?rio; TR2 turno de rega de dois dias; TR3 turno de rega de tr?s dias; e TR4 turno de rega de quaro dias) no crescimento e na produ??o de frutos, do mesmo tomateiro. E, no terceiro experimento, avaliou-se tamb?m o crescimento e a produ??o de frutos de tr?s gen?tipos (os h?bridos, longa vida, D?bora Plus e o Carmem e a variedade Santa Clara), todos para mesa, sob o mesmo regime de irriga??o. Com base nos resultados obtidos, no primeiro experimento, foi poss?vel constatar que o m?ximo de ac?mulo de fitomassa ocorreu entre 70 e 80 dias ap?s o transplante, em todos os tratamentos. O aumento na quantidade de ?gua aplicada acima de 80 % da ETc resultou em maior crescimento vegetativo do tomateiro e incremento na produ??o total de frutos, por?m, com a mesma produ??o comercial de frutos das l?minas menores. Nas irriga??es acima de 80% da ETc, houve um aumento na produ??o de frutos defeituosos de tomate, tornando a cultura mais onerosa, com maior gasto de energia e ?gua, sem aumentar a produ??o comercial de frutos do tomateiro. No segundo experimento, observou-se que n?o houve diferen?a entre os tratamentos, e por isso o turno de rega mais longo, de tr?s dias, produz a mesma qualidade de frutos de tomate dos turnos de regas mais freq?entes, mas com maior potencial de economia de ?gua e energia. O terceiro experimento mostrou que existem grandes diferen?as quanto ao padr?o de crescimento e ?s exig?ncias, tanto h?drica quanto nutricional, dos diferentes gen?tipos de tomateiros. A quantidade de ?gua exigida pelo h?brido Carmem ? inferior a quantidade de ?gua exigida pelo h?brido D?bora, indicando a necessidade de estudos mais detalhados com estrat?gias de irriga??o nos diferentes gen?tipos de tomateiro. Portanto, para haver uma otimiza??o dos recursos aplicados o manejo da irriga??o, usando a ?irriga??o sob d?ficit controlado?, essa dever? atender as diferentes exig?ncias, ao longo do ciclo, de cada gen?tipo.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-08-24T13:37:53Z No. of bitstreams: 1 2011- Veronica da Silva Cardoso.pdf: 2067813 bytes, checksum: a52c401412243d162e7030dda12cdf48 (MD5) / Made available in DSpace on 2016-08-24T13:37:53Z (GMT). No. of bitstreams: 1 2011- Veronica da Silva Cardoso.pdf: 2067813 bytes, checksum: a52c401412243d162e7030dda12cdf48 (MD5) Previous issue date: 2011-04-28 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Piperine interference (amide extracted from black pepper) added to the diet of broiler chickens experimentally intoxicated by aflatoxin B1 (mycotoxin of great importance in the poultry sector) and it?s chemoprotective capacity were the main goal of this work. The experiment was divided into two assays: (i) The first assay was carried out to determine the effects of different concentrations of piperine (0, 60, 120, 180 ppm) and it?s possible toxicity in broiler chickens diets. Ninety six male chicks (Cobb), seven days old were used, being randomly allocated into four experimental groups (n=24) during 35 consecutive days. The following parameters were evaluated: biochemical, hematological, histopathological (proventriculus, gizzard, liver, kidney), histomorphometric (small intestine) and zootecnic. The concentration of 60 ppm of piperine in the diet was safe for broilers, showing better performance of broilers on period from 36 to 42 days old. The concentration of 180 ppm caused leukopenia and concentrations of 120 and 180 ppm was observed decrease in the number of heterophils and monocytes. Hepatotoxicity was observed by elevated AST enzyme activity, histopathological changes and decreased absorption surface in the segments (jejunum and ileum) of small intestine were observed for both 120 and 180 ppm concentrations. (ii) In the second assay, 60 broilers with nine days old divided into four groups: control, piperine (60 ppm added to diet), aflatoxin B1 (0.5 mg of aflatoxin B1.Kg-1 of body weight, orally) and piperine associated aflatoxin B1, were evaluated by effect chemoprotector of piperine against toxics effects of aflatoxin B1 being evaluated for zootecnic, biochemical, histopathological and histomorphometric parameters, toxic heterophils in peripheral blood and genotoxic by comet assay and micronucleus were also determined. No changes in the performance parameters were observed after this experiment. Broiler chickens intoxicated with AFB1 (0.5 mg of aflatoxin B1.kg-1 of body weight ) showed: decreased body weight gain and increased feed conversion; reduced carcass and cuts yields; liver toxicity, with increased relative weight of the liver and heart, macroscopic variations of hepatic parenchyma and increase of liver enzymes activity; kidney enzymes increase without evidence of renal tissue damage macroscopic or microscopic; leukopenia with significant reduction of lymphocytes and heterophils; reduction in absorptive surface due to the reduction of the length and width of the villi of all studied segments of small intestine; presence of toxic heterophils. The cytotoxic and genotoxic effects of aflatoxin B1 described above were significantly reduced or absent in the group of broiler intoxicated with aflatoxin B1 and fed with with piperine. No significant difference between piperine associated aflatoxin B1 in control and piperine groups were observed. The addition of 60 ppm of piperine in the diet of broiler chickens was safe, promoting beneficial effect both in zootecnic parameters and in poultry health, preventing toxic effects of aflatoxin B1in broiler chickens. / A interfer?ncia da piperina (amida extra?da da pimenta do reino) adicionada ? ra??o de frangos de corte intoxicados experimentalmente por aflatoxina B1 (micotoxina de grande relev?ncia no setor av?cola) e sua capacidade quimioprotetora foram o principal objetivo deste trabalho. O experimento foi dividido em dois ensaios: (i) O primeiro ensaio foi realizado para determinar os efeitos de diferentes concentra??es de piperina (0, 60, 120 e 180 ppm) foram avaliados e sua poss?vel toxicidade. Noventa e seis pintos (Cobb), com 7 dias de idade foram divididos aleatoriamente em 4 grupos (n=24), por 35 dias consecutivos. Os par?metros avaliados foram: hematol?gicos, bioqu?micos, histopatol?gicos (proventr?culo, moela, f?gado e rim), histomorfom?trico (intestino delgado) e par?metros zoot?cnicos. A concentra??o de 60 ppm de piperina adicionada ? ra??o foi segura para frangos de corte, tendo ainda resultado em melhor desempenho dos frangos na fase final (36-42 dias de idade). A concentra??o de 180 ppm promoveu leucopenia e nas concentra??es de 120 e 180 ppm foi observada diminui??o do n?mero de heter?filos e mon?citos; hepatotoxicidade, com eleva??o da enzima AST e altera??es histopatol?gicas em ambas as concentra??es; diminui??o da superf?cie de absor??o nos segmentos (jejuno e ?leo) do intestino delgado, por?m, sem altera??o dos par?metros zoot?cnicos. (ii) Para o segundo ensaio com a concentra??o de 60ppm de piperina: 60 frangos com 9 dias de idade, foram divididos em 4 grupos (n=15): grupo controle, grupo aflatoxina B1 (0,5 mg aflatoxina B1.kg-1 de peso vivo por via oral), grupo piperina (60 ppm adicionada ? ra??o) e grupo piperina associada a aflatoxina B1, determinando-se a capacidade quimioprotetora da piperina sendo avaliados os par?metros zoot?cnicos, hematol?gicos, bioqu?micos, histopatol?gicos, histomorfom?tricos, os efeitos genot?xicos da aflatoxina B1 pelo teste do cometa e do micron?cleo, presen?a de heter?filos t?xicos no sangue perif?rico. Os frangos intoxicados com aflatoxina B1 (0,5 mg de aflatoxina B1.Kg-1 de peso vivo) apresentaram: diminui??o do ganho m?dio de peso e piora da convers?o alimentar; diminui??o do rendimento de carca?a e cortes; hepatotoxicidade, com aumento de peso relativo do f?gado e cora??o, varia??es macrosc?picas do par?nquima hep?tico e eleva??o das enzimas hep?ticas; aumento das enzimas renais, sem evid?ncia de les?es macrosc?picas e microsc?picas no tecido renal; leucopenia, com diminui??o significativa de linf?citos e heter?filos; diminui??o da superf?cie de absor??o em fun??o da redu??o do comprimento e largura das vilosidades de todos os segmentos estudados do intestino delgado; presen?a de heter?filos t?xicos. Os efeitos citot?xicos e genot?xicos da aflatoxina B1 foram significativamente reduzidos ou ausentes no grupo piperina associada a aflatoxina B1, sem diferen?a significativa entre o grupo controle e piperina. A ra??o de frangos de corte com 60 ppm de piperina foi segura, promovendo efeito ben?fico tanto nos par?metros zoot?cnicos avaliados, como na sanidade av?cola, por impedir os efeitos t?xicos da aflatoxina B1 em frangos de corte.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-08-31T18:29:21Z No. of bitstreams: 1 2011 - Ludmila Fonseca da Silva.pdf: 418709 bytes, checksum: 3fdbea46dfe13f8e8414fea7b84fbd88 (MD5) / Made available in DSpace on 2016-08-31T18:29:21Z (GMT). No. of bitstreams: 1 2011 - Ludmila Fonseca da Silva.pdf: 418709 bytes, checksum: 3fdbea46dfe13f8e8414fea7b84fbd88 (MD5) Previous issue date: 2011-02-25 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Two experiments were installed. The first experiment was conducted to evaluate the physiological quality of sunflower seeds after hydration by the methods of humid atmosphere and soak substrate combined to 10 and 20?C to increase the water content of seeds for 15, 20 and 25%. For this, the initial physiological quality and after the moistening of the seeds was determined by germination tests and vigor. The second experiment was conducted to evaluate the precocity of the primary root emission of sunflower seeds as a vigor test. For this, four seed lots were tested for germination and vigor, among them, the primary root emission aiming percentage of emission and precocity index. From the results it was concluded that the method of soak substrate at 10?C to increase the water content at 15 and 20% was positive for moistening the seeds of high quality, although it has seen little reduction in seedling vigor. The test root emission after 48 hours was effective in classifying different levels of vigor lots of sunflower seeds / Foram instalados dois experimentos. O primeiro foi realizado com o objetivo de avaliar a qualidade fisiol?gica das sementes de girassol ap?s a hidrata??o pelos m?todos da atmosfera ?mida e substrato ?mido combinados a 10 e 20?C para elevar o teor de ?gua das sementes para 15, 20 e 25%. Para isto, a qualidade fisiol?gica inicial e ap?s o umedecimento das sementes foi determinada pelos testes de germina??o e de vigor. O segundo experimento foi realizado com o objetivo de avaliar a precocidade da emiss?o de raiz prim?ria de sementes de girassol como teste de vigor. Para isto, quatro lotes de sementes foram submetidos a testes de germina??o e vigor, entre eles, o de emiss?o de raiz prim?ria, visando a porcentagem de emiss?o e o ?ndice de precocidade. Pelos resultados foi poss?vel concluir que o m?todo do substrato ?mido a 10?C visando aumentar o teor de ?gua a 15 e 20% foi favor?vel para o umedecimento das sementes de elevada qualidade, embora tenha sido observado pequena redu??o do vigor das pl?ntulas. O teste de emiss?o de raiz prim?ria ap?s 48 horas foi eficiente na classifica??o de distintos n?veis de vigor dos lotes de sementes de girassol.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-09-08T13:37:00Z No. of bitstreams: 1 2011 - Mariana Guedes Camargo.pdf: 1490617 bytes, checksum: fa92cbaf85207d3979daee781f5d74b1 (MD5) / Made available in DSpace on 2016-09-08T13:37:00Z (GMT). No. of bitstreams: 1 2011 - Mariana Guedes Camargo.pdf: 1490617 bytes, checksum: fa92cbaf85207d3979daee781f5d74b1 (MD5) Previous issue date: 2011-08-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The formulations of entomopathogenic fungi to control ticks has been widely studied. The present study evaluated the efficacy of Metarhizium anisopliae sensu lato (s.l.) and Beauveria bassiana oily formulations on different Rhipicephalus microplus stages. The efficacy of conidial aqueous suspensions was compared to the efficacy of conidia formulated in 10, 15 or 20% mineral oil. Twelve groups were studied: one control aqueous, three control groups oil-based at 10%, 15% or 20%, two fungal aqueous suspensions of M. anisopliae s.l. or B. bassiana and M. anisopliae s.l. or B. bassiana oil-based formulations at 10%, 15% or 20%. To prepare aqueous suspensions and oily formulations, fungal isolates were cultivated on grains rice in polypropylene bags. The conidial suspensions and formulations had concentration of 108 conidia/mL. Bioassays were repeated twice. After treatment, the biological parameters of engorged females were evaluated; the following parameters were evaluated in the bioassays with eggs: period of incubation, period of hatch and hatching percentage; in bioassays with larva mortality was evaluated. Metarhizium anisopliae s.l. and B. bassiana oil-based formulations were more effective than aqueous suspensions to R. microplus eggs, larvae and engorged females. Metarhizium anisopliae s.l. oil-based formulations caused significant effects in all biological parameters of engorged females while B. bassiana oil-based formulations modified significantly the nutritional index only. Metarhizium anisopliae s.l. and B. bassiana formulated in mineral oil caused a control percentage up to 93.69% and 21.67%, respectively, while M. anisopliae s.l. and B. bassiana aqueous suspension caused a control percentage of 18.70% and 1.72%, respectively. Eggs treated with M. anisopliae s.l. and B. bassiana oil-based formulations had reduced percentage of hatch up to 102.5 and 3.65 times, respectively. In the bioassay with larvae, M. anisopliae s.l. oil-based formulations caused approximately 100% mortality five days after treatment, while larva treated with B. bassiana oil-based formulations reached 100% mortality only at day 20 after treatment. Larva from oil-based control groups had mortality at day 15 after treatment, indicating possible toxic effect off the oil for this R. microplus stage. The results showed that M. anisopliae s.l., Ma 959 isolate, was more virulent to R. microplus engorged females, eggs and larvae than B. bassiana, Bb 986 isolate. The fungal mineral oily formulations tested were more effective than the aqueous suspension. Oil-based formulations at 10%, 15% or 20% enhances the activity of M. anisopliae s.l., Ma 959, and B. bassiana, Bb 986, to R. microplus tick and can be used as an adjuvant for oily formulations / A utiliza??o de formula??es de fungos entomopatog?nicos no controle de carrapatos tem sido amplamente estudada. O presente estudo avaliou a efic?cia de formula??es do isolado Ma 959 de Metarhizium anisopliae sensu lato (s.l.) e Bb 986 de Beauveria bassiana contendo 10%, 15% e 20% de ?leo mineral sobre ovos, larvas e f?meas ingurgitadas de Rhipicephalus microplus, al?m de comparar a efici?ncia entre formula??es oleosas e suspens?es aquosas dos mesmos isolados f?ngicos sobre as fases do desenvolvimento do carrapato R. microplus. Foram formados doze grupos: controle aquoso e controles com 10%, 15% ou 20% de ?leo mineral, suspens?o aquosa de M. anisopliae s.l. ou B. bassiana e formula??es de M. anisopliae s.l. ou B. bassiana contendo 10%, 15% ou 20% de ?leo mineral. Para o preparo das suspens?es aquosas e formula??es oleosas, os isolados f?ngicos foram cultivados em gr?os de arroz acondicionado em sacos de polipropileno. As suspens?es e formula??es conidiais utilizadas possu?am concentra??o de 108 con?dios/mL. Os bioensaios foram repetidos duas vezes. Os par?metros biol?gicos das f?meas ingurgitadas foram avaliados; em rela??o aos ovos foram avaliados os per?odos de incuba??o e eclos?o e o percentual de eclos?o, e para larvas foi avaliado o percentual de mortalidade. As formula??es oleosas de M. anisopliae s.l. e de B. bassiana foram mais eficazes sobre ovos, larvas e f?meas ingurgitadas de R. microplus do que as suspens?es aquosas. O isolado de M. anisopliae s.l. formulado em ?leo mineral causou altera??es significativas em todos os par?metros de f?meas ingurgitadas, entretanto, as formula??es oleosas do isolado de B. bassiana alteraram significativamente somente o ?ndice nutricional. Os isolados f?ngicos de M. anisopliae s.l. e B. bassiana formulados em ?leo mineral apresentaram percentual de controle de at? 93,69% e 21.67%, respectivamente, enquanto que o percentual de controle das suspens?es aquosas de M. anisopliae s.l. e B. bassiana foi de 18,70% e 1,72%, respectivamente. No tratamento de ovos, as formula??es oleosas de M. anisopliae s.l. e B. bassiana causaram redu??o no percentual de eclos?o de at? 102,5 e 3,64 vezes, respectivamente. No bioensaio com larvas, as formula??es oleosas de M. anisopliae s.l. causaram um percentual de mortalidade pr?ximo a 100% no quinto dia ap?s o tratamento, enquanto que as formula??es de B. bassiana atingiram este percentual somente no 20? dia ap?s o tratamento. Os grupos controle contendo ?leo mineral causaram mortalidade de larvas a partir do 15? dia ap?s o tratamento, indicando um poss?vel efeito t?xico do ?leo sobre este est?gio de R. microplus. Os resultados demonstram que o isolado Ma 959 de M. anisopliae s.l. foi mais virulento para f?meas ingurgitadas, ovos e larvas de R. microplus do que o isolado Bb 986 de B. bassiana. As formula??es oleosas dos fungos testados foram mais eficazes do que as suspens?es aquosas. O ?leo mineral utilizado nas concentra??es de 10%, 15% e 20% potencializa a a??o dos isolados Ma 959 de M. anisopliae s.l. e Bb 986 de B. bassiana contra o carrapato R. microplus, podendo ser utilizado como adjuvante em formula??es oleosas.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-09-14T16:49:16Z No. of bitstreams: 1 2011 - Alex Alexandre Mengel.pdf: 1178563 bytes, checksum: 5808e4d4679e0f538727c860d52d9072 (MD5) / Made available in DSpace on 2016-09-14T16:49:16Z (GMT). No. of bitstreams: 1 2011 - Alex Alexandre Mengel.pdf: 1178563 bytes, checksum: 5808e4d4679e0f538727c860d52d9072 (MD5) Previous issue date: 2011-03-25 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Since 2003, with the approval of the Framework Convention on Tobacco Control (FCTC) at the 56th World Health Assembly, the discussions on tobacco control in Brazil has been intesified up to 2005, when the country ratified the treaty. Upon the ratification, the federal government created diversification program called Diversification of areas cultivated with tobacco National Program. Thus, this study aims to examine how goals and strategies aimed at early FCTC tobacco farming are being translated to Brazil; how these goals influence the strategies of the actors of the productive chain of the tobacco who act nationally; and how disputes between these actors influence this translation. Moreover, we also analyze the one hand, how the operation of this program of diversification is influencing disputes for space between the actors involved in tobacco productive chain and, on the other hand, how these actors influence the operation of such a program . To make this analysis possible, we used the concept of translation developed by Hassenteufel (2005) and the notion of policy networks by Hassenteufel (1995) and Romano (2009). Our main source of research was the semi-structured interviews with leaders of organizations representing the farmers and industry organized nationally, who work in tobacco production chain, with the National Coordination of the Diversification of areas cultivated with tobacco National Program and the Direction of the Executive Secretariat of the National Committee for the Implementation of the FCTC. We also examined documents relating to the ratification of the treaty in question, published by the National Congress, and news from the Ministry of Agrarian Development dealing with the tobacco farming. Thus, it was possible to divide the players that integrate the supply chain of tobacco on two networks, one of which network we called pro-integration of tobacco production and other network antiproductive integration. We observe that these networks, organized in favor of their historical interests, had great influence in how the FCTC has been ratified by Brazil. Futhermore, we note that the FCTC has changed the relationship among actors in the supply chain, leading to the strengthening of anti-network integration. We further note that the actors in such networks are close to different sectors of government and that this approach influences the priority of these sectors before the FCTC goals related to tobacco farming / A partir de 2003, com a aprova??o da Conven??o Quadro para o Controle do Tabaco (CQCT) na 56? Assembl?ia Mundial da Sa?de, as discuss?es sobre o controle do tabaco no Brasil se intensificaram at? a ratifica??o do tratado pelo pa?s, no ano de 2005. Por ocasi?o da ratifica??o, o governo federal criou um programa de diversifica??o denominado Programa Nacional de Diversifica??o de ?reas Cultivadas com Tabaco. Diante disso, este trabalho visa analisar como os objetivos e estrat?gias iniciais da CQCT voltados para a fumicultura est?o sendo traduzidos para o Brasil; como tais objetivos influenciam as estrat?gias dos atores da cadeia produtiva do tabaco que atuam nacionalmente; e como as disputas entre estes atores influenciam essa tradu??o. Ademais, buscamos ainda analisar, por um lado, de que maneira a operacionaliza??o do referido programa de diversifica??o est? influenciando as disputas por espa?o entre os atores envolvidos na cadeia produtiva do tabaco e, por outro lado, como estes atores influenciam a operacionaliza??o de tal programa. Para que tal an?lise fosse poss?vel utilizamos o conceito de tradu??o desenvolvido por Hassenteufel (2005) e a no??o de redes de pol?tica apresentada por Hassenteufel (1995) e Romano (2009). Nossa principal fonte de pesquisa foi a realiza??o de entrevistas semi-estruturadas com os dirigentes das entidades de representa??o dos agricultores e da ind?stria, organizadas nacionalmente, que atuam na cadeia produtiva do tabaco, com a Coordena??o Nacional do Programa Nacional de Diversifica??o de ?reas Cultivadas com Tabaco e com a Dire??o da Secretaria Executiva da Comiss?o Nacional para a Implementa??o da CQCT. Examinamos ainda, documentos relativos ? ratifica??o do tratado internacional em quest?o, publicados pelo Congresso Nacional, e not?cias do Minist?rio do Desenvolvimento Agr?rio que tratavam da fumicultura. Deste modo, foi poss?vel dividir os atores que integram a cadeia produtiva do tabaco em duas redes, sendo que uma delas denominamos de rede pr?-integra??o produtiva da cultura do tabaco e a outra de rede anti-integra??o produtiva. Observamos que estas redes, organizando-se em prol de seus interesses hist?ricos, tiveram grande influ?ncia na maneira com que a CQCT foi ratificada pelo Brasil. Al?m disso, constatamos que a CQCT modificou as rela??es entre os atores da cadeia produtiva, propiciando o fortalecimento da rede anti-integra??o. Observamos ainda, que os atores de tais redes aproximam-se de diferentes setores do governo e que tal aproxima??o influencia a prioridade destes setores para com os objetivos da CQCT relativos ? fumicultura.

Submitted by Leticia Schettini (leticia@ufrrj.br) on 2016-09-19T15:16:21Z No. of bitstreams: 1 2010 - Juarez Vicente.pdf: 1012625 bytes, checksum: 30ce03687174fc4cf4226e455adde13a (MD5) / Made available in DSpace on 2016-09-19T15:16:21Z (GMT). No. of bitstreams: 1 2010 - Juarez Vicente.pdf: 1012625 bytes, checksum: 30ce03687174fc4cf4226e455adde13a (MD5) Previous issue date: 2010-05-07 / From the scientific viewpoint, the word ?uncertainty? expresses doubt about an analytic result. The implementation of the concept of uncertainty of measurement is a crucial step that the Brazilian laboratories must take in the process for obtaining the certification of the ability to perform essays in accordance with the Brazilian technical norm ABNT NBR ISO/IEC 17025. Regardless the technical area of application, the determination of the uncertainty of measurement associated with the result of an analysis is extremely important, especially in the food industry. The expanded uncertainty is related with the degree of reliability of an analytical result, and by means of this information it is possible to evaluate if the result of an analysis is consistent, i.e., if the uncertainty associated to the measurement remains inside an acceptable range. When the percentage of uncertainty exceeds a threshold, it is necessary to find the process variables that more intensely contribute to increasing the uncertainty and, in the sequence, to take corrective actions in order to minimize the impact caused for those variables over the uncertainty of measurement. The aim of this study was to detect the uncertainty of measurement associated with the analysis of total reducing sugars (TRS) by the Lane-Eynon method. The equipments used were analytical and semi analytical balances, burettes with 10mL and 25mL, and the food matrix studied was wild honey. To perform the calculations of the standard uncertainty, u, information about the uncertainty of the laboratory materials used in the analysis ? obtained from the certificate of calibration. The combined uncertainty, uc, was obtained by deriving the influence factors and considering, if necessary, the effective degree of freedom, ?eff, as stated in the Welch-Satterthwaite equation. The expanded uncertainty, U, was obtained by multiplying uc by the appropriate coverage factor, k = 2 (at level of confidence of 95,45%). The results showed that the expanded uncertainty obtained for the analysis of TRS was less than 2,0% when the analytical balance was used. The process variable having the greatest impact was the volume (close to 80,0%), followed by the title (close to 20,0%). The analysis of the expanded uncertainty obtained for the analysis of TRS when the semi analytical balance, and 10mL as well as 25mL burettes were used provided reliable results. However, care must be taken in such a combination of equipments, especially when using the 25mL burettes, since the percentage of uncertainty was great than 3,5%, too close to the limit established by the Codex Alimentarius, 4,0%. It was observed that, in this case, the variable having the greatest impact on the uncertainty was the title, with 79,82% (10mL burettes), and 87,10% (25mL burettes). / Do ponto de vista t?cnico-cient?fico, a palavra ?incerteza? expressa a d?vida em rela??o a um resultado anal?tico. A aplica??o do conceito de incerteza de medi??o ? fundamental para os laborat?rios brasileiros que almejam obter o reconhecimento da capacidade de realiza??o de ensaios em conformidade com a norma ABNT NBR ISO/IEC 17025. Independentemente da ?rea de atua??o, ? de extrema import?ncia o estudo e o conhecimento da incerteza de medi??o associada a um resultado de an?lise, em particular quando aplicado ? ind?stria de alimentos. A incerteza expandida informa o grau de confiabilidade de um resultado anal?tico e, atrav?s dela, ? poss?vel avaliar, a um n?vel de abrang?ncia estabelecido, se o resultado de uma an?lise transmite credibilidade, ou seja, se o valor da incerteza est? em uma faixa de concentra??o aceit?vel ou n?o. Quando o percentual de incerteza ultrapassa o limite aceit?vel, ? necess?rio conhecer quais as vari?veis do m?todo que mais contribuem para a incerteza e executar as medidas corretivas a fim de minimizar este impacto e, consequentemente, reduzir a incerteza total. O objetivo geral deste trabalho foi determinar a incerteza expandida associada ? an?lise titulom?trica de a??cares redutores totais (ART) pelo m?todo de Lane-Eynon, tendo como matriz uma amostra de mel, utilizando balan?a anal?tica e semi anal?tica e buretas de 10mL e 25mL. Para o c?lculo da incerteza padr?o (u), utilizaram-se os dados obtidos nos certificados de calibra??o de equipamentos e vidrarias empregados na an?lise. A incerteza combinada ( ) foi obtida derivando os fatores de influ?ncia e considerando, quando necess?rio, o grau de liberdade efetivo (?eff), dado pela Equa??o de Welch-Satterthwaite. Obteve-se a incerteza expandida (U) multiplicando-se por 2 (dois) o valor de para um n?vel de confian?a de 95,45%. Os resultados obtidos mostraram que a incerteza expandida de ART utilizando balan?a anal?tica n?o foi significativa (<2%) e que a vari?vel que mais influenciou foi o volume de amostra gasto (~80%), seguido do T?tulo (~20%). A an?lise da incerteza expandida de ART obtida com balan?a semi anal?tica e buretas de 10mL e 25mL gerou resultados confi?veis. No entanto, deve haver cautela neste caso, especialmente ao se utilizar bureta de 25mL, visto que o valor percentual de incerteza superou 3,5%. Observa-se que a vari?vel que mais contribui para a incerteza foi o T?tulo com 79,82% (bureta de 10mL) e 87,10% (bureta de 25mL).

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-09-20T12:24:52Z No. of bitstreams: 1 2011 - Cristina Silva Feltrin.pdf: 14589296 bytes, checksum: 0ec7d210e2c7239992ff99553a57fdb9 (MD5) / Made available in DSpace on 2016-09-20T12:24:52Z (GMT). No. of bitstreams: 1 2011 - Cristina Silva Feltrin.pdf: 14589296 bytes, checksum: 0ec7d210e2c7239992ff99553a57fdb9 (MD5) Previous issue date: 2011-09-29 / The pig is a very important activity in the economic scenario of the country, but the pig manure, and if not properly treated, they become a powerful environmental polluter. On the other hand, environmental education can be a means of generating ideas and actions to improve the quality of teaching in schools. Thus, the objective of this study was to propose that environmental education is applied in the swine industry of the Farroupilha Federal Institute ? Campus S?o Vicente do Sul (IFF - Campus SVS), and valued, both in practical classes, as in the theoretical . Thus, it was necessary to conduct an environmental analysis of waste management of these facilities, evaluating the students' perception about the environmental impacts. The result was, more than 68% of students are unaware of the harm that poor disposal of pig waste can cause to the environment. In step characterized by meetings and field research, students found that the IFF ? Campus SVS facilities are pigs in adverse conditions, so students do not show, appropriately, the correct way of handling the waste. After the fieldwork, students who participated and those who did not participate in the survey were asked again to verify the degree of learning. The result of this step showed that students who participated in the survey had a higher rate of correct responses, which shows that implementation of the Environmental Education methods are effective when applied effectively. As a result of the lack of increased workload on the topic "Swine and the Environment" in the disciplines of Environmental Management and Swine, the bad influence of facilities on learning, students found it difficult to correctly answer some simple questions of the questionnaires. It was also found that most students said that the facilities needed reforms because, as they themselves said, the facilities were poor and lacked space for practical classes. Thus, the final results have intensified the need for improvements in environmental education and care for the proper management of waste at IFF ? Campus SVS is therefore a necessary pedagogical proposal seeking to increase the amount of content related to the preservation of environment and proper management to pig farming waste. Because agricultural education, teaching practice dedicated to the preservation of the environment should be highlighted. From all the results found in this study, warned that the direction of the IFF - Campus SVS that need to be built new facilities for swine, with adequate infrastructure. As a consequence, in April 2011, the direction of the IFF - Campus SVS calls for a new project facilities for swine. In July 2011 the project was completed. Thus, it is considered that this work has contributed significantly to changes in posture in the face of reality presented, and attracted the attention of managers of the Institute, helping to make possible the implementation of projects for new facilities. / A suinocultura ? uma atividade muito importante no cen?rio econ?mico do pa?s, por?m os dejetos de su?nos, se n?o forem corretamente tratados, tornam-se um poderoso poluidor ambiental. Por outro lado, a educa??o ambiental pode ser um meio de gerar reflex?es e a??es para a melhoria da qualidade de ensino nas escolas. Diante disso, o objetivo deste trabalho foi o de propor que a Educa??o Ambiental seja aplicada no setor de suinocultura do Instituto Federal Farroupilha Campus S?o Vicente do Sul (IFF ? Campus SVS), sendo valorada, tanto no ?mbito das aulas pr?ticas, como nas te?ricas. Para tanto, foi necess?rio realizar uma an?lise ambiental do manejo dos dejetos nessas instala??es, avaliando-se a percep??o dos alunos a respeito dos impactos ambientais. O resultado foi: mais de 68% dos alunos n?o sabem dos malef?cios que a m? disposi??o dos dejetos su?nos pode causar ao meio ambiente. Na etapa caracterizada pelos encontros e pesquisas de campo, os alunos verificaram que no IFF ? Campus SVS as instala??es de su?nos est?o em condi??es adversas, sendo assim, os alunos n?o evidenciam, de maneira apropriada, o correto modo de manejo dos dejetos. Ap?s a pesquisa de campo, os alunos que participaram e os que n?o participaram da pesquisa foram novamente questionados para a verifica??o do grau de aprendizado. O resultado dessa etapa mostrou que os alunos, que participaram da pesquisa, tiveram maior ?ndice de acertos nas respostas, o que demonstra que a aplica??o das metodologias de Educa??o Ambiental surtem efeito, quando aplicadas efetivamente. Em conseq??ncia da falta de maior carga hor?ria sobre o tema ?Suinocultura e o Meio Ambiente? nas disciplinas de Gest?o Ambiental e Suinocultura, al?m da m? influ?ncia das instala??es sobre o aprendizado, os alunos encontraram dificuldades em responder corretamente algumas perguntas simples dos question?rios. Constatou-se tamb?m que a maioria dos alunos manifestou que as instala??es precisavam de reformas, pois, como eles mesmos afirmaram, as instala??es estavam prec?rias e faltava espa?o para as aulas pr?ticas. Assim sendo, os resultados finais intensificaram a necessidade de melhorias na Educa??o Ambiental e na preocupa??o com o manejo adequado dos dejetos no IFF - Campus SVS. Portanto ? necess?ria uma proposta pedag?gica buscando aumentar a quantidade de conte?dos relacionados ? preserva??o do meio ambiente e ao manejo adequado para os dejetos da suinocultura. Por ser ensino agr?cola, a pr?tica de ensino voltada para a preserva??o do meio ambiente deveria ser evidenciada. A partir de todos os resultados encontrados nessa pesquisa, advertiu-se ? dire??o do IFF ? Campus SVS da necessidade que fossem constru?das novas instala??es de suinocultura, com infraestrutura adequada. Como conseq??ncia disto, em Abril de 2011, a dire??o do IFF - Campus SVS solicitou a elabora??o de um novo projeto de instala??es para suinocultura. Em Julho de 2011 o projeto foi conclu?do. Assim, considera-se que este trabalho contribuiu expressivamente para as mudan?as de postura, diante da realidade apresentada, e despertou a aten??o dos gestores do Instituto, colaborando para a viabiliza??o da execu??o dos projetos de novas instala??es.

Submitted by Leticia Schettini (leticia@ufrrj.br) on 2016-09-21T15:12:59Z No. of bitstreams: 1 2011 - Camila Pinheiro Nobre.pdf: 2714138 bytes, checksum: bc436d879ddfded703d4d5fea9f9943c (MD5) / Made available in DSpace on 2016-09-21T15:12:59Z (GMT). No. of bitstreams: 1 2011 - Camila Pinheiro Nobre.pdf: 2714138 bytes, checksum: bc436d879ddfded703d4d5fea9f9943c (MD5) Previous issue date: 2011-02-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior-CAPES / The aim of this study was to observe the germination, production of glomalin and monitor development of species of mycorrhizal fungi (AMF) of the germplasm bank of Embrapa in root organ culture (ROC) of basil and bryophytes in vitro, analyzing their interaction with the hosts and the influence of the culture medium enriched with humic acids on fungal growth and bryophyte Lunularia cruciata. For this, some AMF species were selected and had their glomerospores extracted and subjected to surface disinfection process, placed in water-agar medium and temperature-controlled chamber to germinate. A germination test was conducted for 15 days, and the results were analyzed by ANOVA and Tukey test applied to 5% probability. Species with germinated glomerospores (Gigaspora margarita, Glomus manihots, Scutellospora heterogama and Glomus proliferum) were placed in ROC of purple basil where they had their growth observed until 100 days after inoculation. Also as part of the characterization of AMF species it was quantified the level of glomalin in the samples of multiplication and the results were subjected to analysis of variance and Scott-Knott test at 5% probability. In the second chapter it was investigated the effect of mycorrhizal association in ROC of purple basil, and in the third chapter the influence of different concentrations of humic acid and association with growth of Lunularia cruciata (area and length). The results were submitted to ANOVA and Tukey test at 5% probability. Scutellospora heterogama was the species with higher germination rates of glomerosporos, followed by Gigaspora margarita. The species of Glomus sporulated after formation of symbiosis. The amount of glomalin produced by different AMF was distinct, especially in total glomalin fraction. Different AMF species did not show difference in efficiency to promote development of Ocimum basilicum transformed roots. The growth of basil transformed roots in the MSR was extended from 15 days after inoculation with mycorrhizal fungi. The usage of humic acids in the culture medium in concentrations of 20 and 80 mg CL-1 enhanced growth of bryophyte L. cruciata, and its association with mycorrhizal fungi, as well as promoted the highest number of spores of Gl. proliferum. The association L. cruciata and AMF was characterized as mutualistic, since both had advantages in growth and sporulation. Gigaspora margarita and Glomus proliferum increased growth of Lunularia cruciata. / O objetivo do trabalho foi observar a germina??o e produ??o de glomalina e acompanhar desenvolvimento de esp?cies de fungos micorr?zicos arbusculares (FMA) do banco de germoplasma da Embrapa em ra?zes geneticamente modificadas de manjeric?o e em bri?fitas in vitro. Ainda, avaliar sua intera??o com os hospedeiros e a influ?ncia de meio de cultura enriquecido com ?cidos h?micos no crescimento do fungo e da bri?fita Lunularia cruciata. Para isso algumas esp?cies de FMAs foram selecionadas e tiveram seus glomerosporos extra?dos e submetidos ao processo de desinfesta??o superficial, colocados em meio Agar?gua e c?mara com temperatura controlada para germinar. Realizou-se teste de germina??o por 15 dias e os resultados foram submetidos a an?lise de vari?ncia e aplicado teste de Tukey ? 5% de probabilidade. Esp?cies com glomerosporos germinados (Gigaspora margarita, Glomus manihots, Scutellospora heterogama e Glomus proliferum) foram colocadas em ra?zes modificadas de manjeric?o roxo onde tiveram seu crescimento observado at? 100 dias ap?s a inocula??o. Ainda como parte da caracteriza??o de esp?cies de FMAs foi realizado a quantifica??o dos teores de glomalina nas amostras de multiplica??o sendo os resultados submetidos a an?lise de vari?ncia e aplicado teste de Scott-Knott ? 5% de probabilidade. No segundo cap?tulo foi verificado o efeito da associa??o FMAs em ra?zes modificadas de manjeric?o roxo e no terceiro cap?tulo a influ?ncia da associa??o ?cido h?mico em diferentes concentra??es, bri?fita Lunularia cruciata (?rea e comprimento) e FMAs. Os resultados foram submetidos ? an?lise de vari?ncia e teste de Tukey a 5% de probabilidade. Scutellospora heterogama foi a esp?cie com maiores taxas de germina??o de glomerosporos, seguida da Gigaspora margarita. As esp?cies de Glomus esporularam logo ap?s a forma??o da simbiose. A quantidade de glomalina produzida pelos diferentes FMAs foi distinta, em especial na fra??o glomalina total. As diferentes esp?cies de FMAs n?o apresentaram distin??o na efici?ncia de promover o desenvolvimento das ra?zes transformadas de Ocimum basilicum. O crescimento de ra?zes transformadas de manjeric?o em meio MSR foi ampliado a partir dos 15 dias ap?s a inocula??o de fungos micorr?zicos. O uso de ?cidos h?micos no meio de cultura em concentra??es de 20 e 80 mg C.L-1 incrementou o crescimento da bri?fita Lunularia cruciata e sua associa??o com fungos micorr?zicos arbusculares, assim como promoveram a maior esporula??o de Gl. proliferum. A associa??o Lunularia cruciata e FMAs foi caracterizada como mutualista j? que ambos apresentaram benef?cios em crescimento e esporula??o. Gigaspora margarita e Glomus proliferum promoveram maior crescimento de Lunularia cruciata.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-09-28T14:27:47Z No. of bitstreams: 1 2011 - Erica Cristina Rocha Roier.pdf: 982721 bytes, checksum: 24c0654d64de8a5b21a0eea5376f828c (MD5) / Made available in DSpace on 2016-09-28T14:27:47Z (GMT). No. of bitstreams: 1 2011 - Erica Cristina Rocha Roier.pdf: 982721 bytes, checksum: 24c0654d64de8a5b21a0eea5376f828c (MD5) Previous issue date: 2011-02-28 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / This study aimed to evaluate the prevalence of antibodies against Neorickettsia risticii in horses in the microregion of Itagua? RJ, show possible associated factors and identify the agent by molecular techniques. The study was conducted in the districts of Serop?dica, Itagua? and Mangaratiba, Rio de Janeiro. The 350 blood samples were obtained by convenience from horse properties belonging to the region. Serologic testing was performed by Immunofluorescence Assay (IFAI) for N. risticii, being considered positive samples titer 1:50. To evaluate risk factors associated with the presence of antibodies to N. risticii an epidemiological questionnaire was applied to the owners or guardians of animals, which aimed especially farm characteristics and management of animals. Hematological and clinical evaluation was performed for all animals. Molecular analysis by a Real Time PCR was performed from leukocyte cover. The prevalence of antibodies anti-N.risticii in horses of the region of Itagua? was 26.3% (92/350). The frequencies of IgG anti-N.rristicii were 52.2% (48/92) for titers of 1:50, zero for titers of 1:100, 13% (12/92) for titles of 1:200, 28.3% (26/92) for evidence of 1:400 and 6.5% (6 / 92) for titles of 1:800. The age and quality level of the properties were associated (p <0.05) with horses seropositivity for N. risticii. DNA from N. risticii was not detectable in samples of this study. Also no significant changes in the clinical evaluation of animals was found in relation to seropositivity for the agent. Despite showing association (p <0.05) between the seropositivity of the animals and changes in white blood cell of negative animals, these changes were not outside reference limits for the species evaluated. The existence of horses seropositive for N. risticii indicates the presence of this agent in the microregion of Itagua?. / O presente estudo teve por objetivo avaliar a preval?ncia de anticorpos contra Neorickettsia risticii em equinos na microrregi?o de Itagua?-RJ, demonstrar os poss?veis fatores associados e identificar o agente atrav?s de t?cnicas moleculares. O estudo foi conduzido nos munic?pios de Serop?dica, Itagua? e Mangaratiba, estado do Rio de Janeiro. As 350 amostras de sangue foram obtidas por conveni?ncia, das propriedades de cria??o de equinos pertencentes ? regi?o. O teste sorol?gico foi realizado atrav?s da Rea??o de Imunofluoresc?ncia Indireta (RIFI) para N. risticii, sendo consideradas positivas amostras com t?tulo 1:50. Para avalia??o dos fatores de risco associados ? presen?a de anticorpos de N. risticii, aplicou-se um question?rio epidemiol?gico com os propriet?rios e/ou respons?veis dos animais, destacando caracter?sticas da propriedade e manejo dos animais. Realizou-se hemograma e avalia??o cl?nica de todos os animais. As an?lises moleculares atrav?s da t?cnica de Real Time PCR foram realizadas a partir de capa leucocit?ria. A preval?ncia de anticorpos anti-N. risticii em equinos da microrregi?o de Itagua? foi de 26,3% (92/350) pela RIFI. As frequ?ncias de anticorpos IgG anti-N. risticii foram 52,2% (48/92) para titula??es de 1:50, zero para titula??es de 1:100, 13% (12/92) para t?tulos de 1:200, 28,3% (26/92) para t?tulos de 1:400 e 6,5% (6/92) para t?tulos de 1:800. A idade e o n?vel de qualidade das propriedades apresentaram associa??o (p<0,05) com a soropositividade dos equinos para N. risticii. N?o foi detectado o DNA de N. risticii nas amostras do presente estudo. Tamb?m n?o foram evidenciadas altera??es significativas na avalia??o clinica dos animais, em rela??o ? soropositividade para o agente. Apesar de haver associa??o (p<0,05) entre a soropositividade dos animais e altera??es no leucograma dos animais negativos, estas altera??es n?o estiveram fora dos limites de refer?ncia para a esp?cie animal avaliada. A exist?ncia de equinos soropositivos para N. risticii indica a circula??o desse agente na microrregi?o de Itagua?

Submitted by Leticia Schettini (leticia@ufrrj.br) on 2016-10-04T15:54:19Z No. of bitstreams: 1 2011 - Arcangelo Loss.pdf: 3517882 bytes, checksum: 70d6fb3cef54e289b9abe89818c070c1 (MD5) / Made available in DSpace on 2016-10-04T15:54:19Z (GMT). No. of bitstreams: 1 2011 - Arcangelo Loss.pdf: 3517882 bytes, checksum: 70d6fb3cef54e289b9abe89818c070c1 (MD5) Previous issue date: 2011-06-10 / Funda??o Carlos Chagas Filho de Amparo ? Pesquisa do Estado do RJ, FAPERJ, Brasil / The Integrated Agriculture and Cattle-raising System (IACRS) is an excellent option for Cerrado soils, since the association with grasses (Brachiaria) intensify biomass production, especially in the year dry season. The No-till System (NTS) interspersed with brachiaria (Urochloa ruziziensis) and in consortium with maize (IACRS), when compared to the IACRS without brachiaria provides the best balance between distribution of C in the more labile and recalcitrant fractions of soil organic matter (SOM), and increases C and N stock, and soil aggregation. The general objective of this study was to evaluate the contribution of IACRS system on soil fertility, in chemical and physical fractions of SOM, in the distribution of oxidized carbon fractions, in soil aggregation, and C and N stocks in different land use systems in Cerrado, Goias State. Two areas with crop rotation were evaluated in Montividiu municipality, Goias State, identified as: IARCS (Brachiaria + corn/bean/cotton/soybean) and NTS (sunflower/millet/soy/corn). A natural area of Cerrado was taken as natural soil reference. Soil was sampled at 0.0-5.0; 5.0-10.0; 10.0-20.0 and 20.0-40.0 depths, and also up to 100.0 cm, in a randomized design. In Chapter I it was evaluated bulk density (BD), mineralogy properties, and soil fertility. Due to the animal range used in the IACRS, it was not observed increase in BD in comparison to the area without cattle (NTS). The values of SiO2/Al2O3 (ki) soil ratio indicate dominance of gibbsite in the Cerrado natural area, and kaolinite in the cultivated areas. The IACRS, associated with crop and pasture fertilization, resulted in higher soil fertility and nutrient stocks, compared with the NTS. In Chapter II physical and chemical indicators of SOM were evaluated. The total organic carbon (TOC), stocks of C in the humic acid fraction (C-HAF) and oxidizable carbon, and the physical indicators, particulate organic carbon (POC), light organic matter (LOM) and free light fraction (FLF), allowed inferring that IACRS increased these SOM fractions when compared with the NTS. The IACRS also provided a balanced distribution of C labile forms (F1) and recalcitrant (F4) in the soil, a higher degree of SOM humification, and better stratification of POC than the NTS area. In chapter III it was evaluated the soil aggregation, distribution of C and N, natural abundance of 13C and 15N in aggregates and C-CO2 (mineralization carbon) from soil aggregates incubation. IACRS increased: soil aggregation indexes (0-5 and 5-10 cm), TOC and N (0-5 cm), formation of water stable aggregates (5-10 cm), and also had higher accumulation of C-CO2 than NTS. In Chapter IV the distribution of TOC, N total, natural abundance of 13C and 15N were assessed, and quantified the TOC and nitrogen values. The usage of Urochloa ruziziensis associated with IACRS, increased the TOC levels (0-30 cm) and N (0-20 cm), when compared with NTS. It was possible to conclude that IACRS was more efficient to storage TOC than the natural Cerrado area in the 10.0-20.0 and 20.0-30.0 cm layers, and for the sum of the layers 0.0-40.0, and 0.0-60.0 cm. The use of legumes in the crop systems resulted in higher values of 15N compared to Cerrado area. The replacement of the original Cerrado vegetation by agriculture resulted in changes in 13C, as proven after 17 years of cultivation, by incorporation of carbon from grasses in areas of NTS and IACRS. / O sistema de Integra??o Lavoura-Pecu?ria (ILP) ? uma excelente op??o de uso para solos do Bioma Cerrado, pois a associa??o com esp?cies po?ceas (braqui?ria) intensifica a produ??o de palhada, principalmente no per?odo seco do ano. O Sistema Plantio Direto (SPD) intercalado com braqui?ria (Urochloa ruziziensis) e consorciado ao milho safrinha (ILP), comparado ao SPD sem braqui?ria, pode conduzir a equil?brio entre a distribui??o do C das fra??es da mat?ria org?nica do solo (MOS) mais l?beis e recalcitrantes e aumentar estoques de C e N e a agrega??o do solo. O objetivo geral do estudo foi avaliar contribui??es do sistema de ILP na fertilidade do solo, nas fra??es qu?micas e f?sicas da MOS, na distribui??o das fra??es de carbono oxid?vel, na agrega??o do solo e nos estoques de C e N em diferentes sistemas de uso do solo no Cerrado goiano. Foram avaliadas duas ?reas com rota??o de culturas em Montividiu, GO: ILP (milho+braqui?ria/feij?o/algod?o/soja) e SPD (girassol/milheto/soja/ milho). Uma ?rea de Cerrad?o natural foi tomada como condi??o original do solo. Foram coletadas amostras de terra nas profundidades de 0,0-5,0; 5,0-10,0; 10,0-20,0 e 20,0-40,0 cm, e, tamb?m at? 100 cm, em delineamento inteiramente casualizado. No Cap?tulo I foram avaliadas a densidade do solo (Ds), caracteriza??o mineral?gica e fertilidade do solo. Devido a lota??o animal utilizada no ILP n?o foram constatados aumentos da Ds em compara??o ? ?rea sem pisoteio animal (SPD). Os valores da rela??o SiO2/Al2O3 (ki) no solo indicam predom?nio de gibbsita na ?rea de Cerrad?o e de caulinita nas ?reas cultivadas. O sistema de ILP, mais ?s aduba??es das culturas e na braqui?ria, acarretou maior fertilidade do solo e estoques de nutrientes comparados ao SPD. No Cap?tulo II foram avaliados indicadores f?sicos e qu?micos da MOS. Os indicadores carbono org?nico total (COT), estoques de C da fra??o ?cido h?mico (C-FAH) e C oxid?vel e, os indicadores f?sicos, C org?nico particulado (COp), mat?ria org?nica leve (MOL) e fra??o leve livre (FLL), permitiram inferir que o sistema de ILP aumentou essas fra??es da MOS comparado ao SPD. No sistema de ILP a distribui??o das formas de carbono l?beis (F1) e recalcitrantes (F4) no solo foi mais equilibrada, com maior grau de humifica??o da MOS e melhor estratifica??o do COp, comparado ao SPD. No cap?tulo III foram avaliados os ?ndices de agrega??o do solo, a distribui??o dos teores de C e N e a abund?ncia natural de 13C e 15N dos agregados e o C-CO2 (carbono mineraliz?vel) proveniente da incuba??o de agregados do solo. A ILP aumentou os ?ndices de agrega??o do solo (0-5 e 5-10 cm), os teores de COT e N (0-5 cm), a forma??o de agregados est?veis em ?gua (5-10 cm) e tamb?m o ac?mulo de C-CO2, comparada ao SPD. No Capitulo IV foi avaliada a distribui??o do COT, N total, abund?ncia natural de 13C e 15N, e quantificados os estoques de COT e N do solo. A utiliza??o da Urochloa ruziziensis com rota??o de culturas (ILP) aumentou os teores de COT (0-30 cm) e N (0-20 cm), comparada ? rota??o de culturas (SPD). Conclui-se que o sistema de ILP foi mais eficiente em estocar COT no solo que a ?rea de Cerrad?o nas camadas de 10,0-20,0 e 20,0-30,0 cm e, na soma das camadas de 0,0-40,0 e 0,0-60,0 cm. O uso de leguminosas nas ?reas cultivadas acarretou em maiores valores de 15N em compara??o a de Cerrad?o. A substitui??o da vegeta??o original de Cerrad?o para implantar lavouras acarretou mudan?as do 13C, sendo comprovada, ap?s 17 anos de cultivo, a incorpora??o de C das po?ceas nas ?reas de SPD e ILP.