Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-07-26T16:32:18Z No. of bitstreams: 1 2016 - Marcelly Alves da Silva.pdf: 1109436 bytes, checksum: cf0918f898aa3347f3dda630016df417 (MD5) / Made available in DSpace on 2016-07-26T16:32:18Z (GMT). No. of bitstreams: 1 2016 - Marcelly Alves da Silva.pdf: 1109436 bytes, checksum: cf0918f898aa3347f3dda630016df417 (MD5) Previous issue date: 2016-02-26 / SILVA, Marcelly Alves da. Using of calcium and magnesium lignosulfonate in mixtures with phenol-formaldehyde in particleboard manufacturing. 2016. 33 p. Dissertation (Master in forest and Environmental Sciences). Instituto de Florestas, Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ, 2016. The purpose of this study was to evaluate the feasibility of using calcium and magnesium lignosulfonate (LS) in the production of Pinus caribaea var. caribaea particleboard panels, used pure and in mixtures with phenol-formaldehyde (FF). It was determined the basic and apparent density of the wood, as well as the physical and chemical properties of adhesives. In order to evaluate the effect of FF replaced by LS on the physical and chemical properties, panels were produced with different concentrations of these adhesives. The experiment consisted of two phases. The first phase was performed under temperature of 160?C and pressing time of 10 mitutes with the following compositions: 100% FF, and LS substitutions in the proportions of 20, 40, 60, 80 and 100%, with three replications each. In the second phase, the first phase of the three treatments with lower performance in the mechanical properties were tested at a temperature of 180?C and to 7 minutes. The results of basic and apparent wood density were 0.54 and 0.60 g/cm?, respectively. In the second stage the temperature increased and decreased of the pressing time were not sufficient to consolidate the panel, becoming not possible to analyze the results of this phase. In respect to the thickness swelling and water absorption, increases in the proportion of lignosulfonate in the mixture also raise up these values. The substitution of the phenol-formaldehyde adhesive of lignosulfonate was satisfactory in attendance the specific norm for mechanical properties by 80%. The lignosulfonate showed efficiency in the use as an adhesive in the production of particleboard in mixtures with phenol formaldehyde, suggesting that this is an alternative of the use of synthetic adhesives. / SILVA, Marcelly Alves da. Utiliza??o de lignosulfonato de c?lcio e magn?sio em misturas com fenol-formalde?do na produ??o de pain?is aglomerados. 2016. 33 p. Disserta??o (Mestrado em Ci?ncias Ambientais e Florestais). Instituto de Florestas, Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ, 2016. O objetivo deste estudo foi avaliar a viabilidade da utiliza??o do lignosulfonato de c?lcio e magn?sio (LS) na produ??o de pain?is aglomerados de Pinus caribaea var. caribaea, na forma pura e em misturas com fenol-formalde?do (FF). Foram determinadas a densidade b?sica e aparente da madeira, bem como as propriedades f?sicas e qu?micas dos adesivos. De modo a avaliar o efeito da substitui??o de FF por LS sobre as propriedades f?sicas e qu?micas, foram produzidos pain?is com diferentes concentra??es desses adesivos. O delineamento experimental foi constitu?do de duas fases. A primeira fase foi realizada sob a temperatura de 160?C e tempo de prensagem de 10 minutos, com as seguintes composi??es: 100% de FF, e as substitui??es por LS nas propor??es de 20, 40, 60, 80 e 100%, com tr?s repeti??es cada. Na segunda fase, os tr?s tratamentos da primeira fase com desempenho inferior nas propriedades mec?nicas foram testados na temperatura de 180?C em tempos de prensagem de 5 e 7 minutos. Os resultados m?dios da densidade b?sica e aparente da madeira foram de 0,54 e 0,60g/cm?, respectivamente. Na segunda fase, o aumento da temperatura e a diminui??o do tempo de prensagem n?o foram suficientes para consolidar o painel, n?o sendo poss?vel analisar os resultados desta fase. Com rela??o ao inchamento em espessura e absor??o de ?gua, ? medida que aumentou a propor??o de lignosulfonato na mistura elevaram-se tamb?m esses valores. Em at? 80%, a substitui??o do adesivo fenol-formalde?do por lignosulfonato foi satisfat?ria no atendimento a NBR 14810-2 (ABNT,2013) para propriedades mec?nicas. O lignosulfonato apresentou efici?ncia na utiliza??o como adesivo na produ??o de pain?is aglomerados em misturas com fenol-formalde?do, evidenciando que esta ? uma alternativa ? utiliza??o de adesivos sint?ticos.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-15T19:08:49Z No. of bitstreams: 1 LuanHenriqueBarbosaDeAraujo_DISSERT.pdf: 1066346 bytes, checksum: fc97eae876c26fceac9a7ba4fb725583 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-20T20:46:18Z (GMT) No. of bitstreams: 1 LuanHenriqueBarbosaDeAraujo_DISSERT.pdf: 1066346 bytes, checksum: fc97eae876c26fceac9a7ba4fb725583 (MD5) / Made available in DSpace on 2016-06-20T20:46:18Z (GMT). No. of bitstreams: 1 LuanHenriqueBarbosaDeAraujo_DISSERT.pdf: 1066346 bytes, checksum: fc97eae876c26fceac9a7ba4fb725583 (MD5) Previous issue date: 2015-12-15 / Apesar da import?ncia do estudo sobre ra?zes, pouco se sabe sobre os efeitos negativos da compacta??o do solo no desenvolvimento esp?cies florestais da Caatinga. Nesse sentido, objetivou-se avaliar o crescimento inicial de Mimosa caesalpiniifolia, Tabebuia caraiba e Erythina velutina, em solo submetido a variados n?veis de compacta??o. O experimento foi conduzido em casa de vegeta??o localizada na Unidade Acad?mica Especializada em Ci?ncias Agr?rias da UFRN. Pra realiza??o do experimento, foi utilizado Latossolo Amarelo de textura franco-arenosa, proveniente da ?rea de experimenta??o florestal da Escola Agr?cola de Jundia? (EAJ) do munic?pio de Maca?ba-RN, em unidade experimental composta por tr?s an?is de PVC sobrepostos, de 10 cm de di?metro e 25 cm de altura, sendo o anel central o que sofreu a compacta??o. O delineamento experimental utilizado foi o de blocos casualizados, com seis repeti??es, sendo testados quatro n?veis de compacta??o do solo (1,35; 1,45; 1,60 e 1,80 kg.dm-?), avaliando-se as seguintes vari?veis: di?metro, altura, n?mero de folhas, massa seca da parte a?rea e do sistema radicular em cada camada dos vasos. No geral, as esp?cies M. caesalpiniifolia, T. caraiba e E. velutina tiveram o crescimento inicial favorecido pelo tratamento composto por solo n?o compactado. As esp?cies M. caesalpiniifolia e T. caraiba se mostraram relativamente resistente a compacta??o do solo, n?o sofrendo nenhuma redu??o significativa no crescimento radicular a densidade igual ou inferiores a 1,60 kg.dm-?, enquanto, E. velutina se mostrou suscept?vel aos efeitos da compacta??o do solo, apresentando altera??es significativas no crescimento radicular sob densidades de solo igual ou superiores a 1,45 kg.dm-?. O aumento da compacta??o do solo provocou o impedimento da expans?o da raiz pivotante no interior das unidades experimentais, promovendo o ac?mulo de ra?zes nas camadas superiores do solo para as esp?cies estudadas. O impedimento f?sico em subsuperf?cie alterou o crescimento a?reo inicial das esp?cies M. caesalpiniifolia e E. velutina, por?m n?o influenciou o crescimento a?reo das mudas de T. caraiba aos n?veis de compacta??o testados. / Despite the importance of the study of roots, little is known about the negative effects of soil compaction in the development of the Caatinga forest species. In this sense, the objective was to evaluate the initial growth of Mimosa caesalpiniifolia, Tabebuia caraiba and Erythina velutina in soil under varying levels of compression. The experiment was conducted in a greenhouse located at the Academic Unit Specialized in Agricultural Sciences, UFRN. To perform the experiment, was used Oxisoil of sandy loam texture, from forest trial Area Agricultural School of Jundia? (EAJ) of the municipality of Maca?ba-RN, in an experimental unit consisting of three overlapping PVC rings, 10 cm in diameter and 25 cm in height, with a central ring which has undergone compression. The experimental design was a randomized block with six replications, being tested four levels of soil compaction (1.35; 1.45; 1.60 and 1.80 kg.dm-?), evaluating the following variables: diameter, height, number of leaves, dry weight of shoot and root system in each layer of the vessels. Overall, the species M. caesalpiniifolia, T. caraiba and E. velutina had initial growth favored by treatment consists of uncompressed soil. The M. caesalpiniifolia and T. caraiba species proved relatively resistant to compaction of the soil does not undergo any significant reduction in root growth density equal to or less than 1.60 kg.dm-?, whereas E. velutina proved susceptible effects of soil compaction, with significant changes in root growth under soil densities equal to or greater than 1.45 kg.dm-?. Increased soil compaction caused the impediment to the expansion of taproot inside the experimental units, promoting the accumulation of roots in the upper layers of the soil for the studied species. The subsoil physical impediment changed the initial aerial growth of M. caesalpiniifolia and E. velutina, but did not influence the growth of air T. caraiba seedlings the tested compression levels.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-15T19:08:49Z No. of bitstreams: 1 LucianaGomesPinheiro_DISSERT.pdf: 1037688 bytes, checksum: b115230733d95dcc8f34deccfa475cd2 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-20T20:55:22Z (GMT) No. of bitstreams: 1 LucianaGomesPinheiro_DISSERT.pdf: 1037688 bytes, checksum: b115230733d95dcc8f34deccfa475cd2 (MD5) / Made available in DSpace on 2016-06-20T20:55:22Z (GMT). No. of bitstreams: 1 LucianaGomesPinheiro_DISSERT.pdf: 1037688 bytes, checksum: b115230733d95dcc8f34deccfa475cd2 (MD5) Previous issue date: 2015-12-14 / O estudo visou (1) desenvolver marcadores microssat?lites (SSR) para Copernicia prunifera, e (2) caracterizar o padr?o demogr?fico e a estrutura gen?tica espacial (EGE) entre est?gios de vida por meio de iniciadores ISSR. Foram desenvolvidos 17 pares de iniciadores SSR. A estrutura demogr?fica e EGE foram avaliadas em uma parcela com ?rea de 0,55 ha em ?rea natural, onde todos os indiv?duos foram georreferenciados (n = 161). As an?lises moleculares dos SSR indicaram que todos os pares de iniciadores constru?dos, quando submetidos ? PCR, amplificaram. Estes apresentaram tamanhos de pares de bases variando entre 113 e 250 bp. As an?lises demogr?ficas mostraram padr?o de distribui??o espacial agregado nas primeiras classes de dist?ncia, aleat?rio entre 40 e 50 m e segregado em dist?ncias superiores. Dos 30 marcadores ISSR testados, oito foram selecionados gerando um total de 102 locos, sendo 100 polim?rficos. Entre os tr?s est?gios, os jovens apresentaram maior ?ndice de diversidade gen?tica de Nei (He = 0,37), j? o menor ?ndice foi observado nos adultos reprodutivos (He = 0,34). Os resultados da AMOVA mostraram maior diferencia??o gen?tica dentro dos est?gios de desenvolvimento (98,61%) do que entre os est?gios (1,39%). A popula??o total apresentou rela??o positiva e significativa de parentesco na primeira classe de dist?ncia (12,3 m). Os jovens apresentaram parentesco significativo at? 10,5 m e negativa na quinta classe de dist?ncia (37,6 m). Os adultos n?o reprodutivos tiveram rela??o positiva de parentesco na primeira classe de dist?ncia (10,9 m) e distribui??o aleat?ria dos gen?tipos nas demais classes. Os adultos reprodutivos apresentaram gen?tipos espacialmente aleat?rios. Os valores para os testes de gargalo gen?tico demonstraram que o n?mero de locos com excesso de heterozigosidade observado foi maior que o esperado. Os resultados da EGE refletem a dispers?o restrita da esp?cie e os testes de gargalo a redu??o de gen?tipos provocados pela antropiza??o dos ambientes naturais de C. prunifera. / The present study aimed to develop microsatellite markers (SSR) for Copernicia prunifera; and characterize the demographic pattern and the spatial genetic structure (SGS) in different development stages of C. prunifera in a natural population of Rio Grande do Norte (RN) by using ISSR molecular markers. 17 SSR primers pairs were developed, which were tested by using DNA from samples of different populations. The demographic and genetic spatial structure was assessed in a plot with an area of 0.55 ha, where all individuals were georeferenced. The molecular analyses with the use of microsatellite markers pointed out that all built primers pairs, when submitted to PCR, had amplification. They showed sizes of base pairs ranging between 113 and 250 bp. The demographic analyses showed a clustered standard of spatial distribution in the first distance classes, random between 40 and 50 m and segregated in higher distances. Eight ISSR primers were used, thereby producing a total of 102 loci, with 100 of them being polymorphic. Among the three stages, the young showed the highest Nei?s genetic diversity index (He = 0.37); whilst the lowest index was found in the reproductive adults (He = 0.34). The AMOVA results showed a greater genetic differentiation within the development stages (98.61%) in comparison to the interval among the stages (1.39%). The total population (n = 161) showed a positive and significant relationship of kinship in the first distance class (12.3 m). The young showed a significant kinship up to 10.5 m and negative in the fifth distance class (37.6 m). The non-reproductive adults had a positive relationship of kinship in the first distance class (11.0 m) and random distribution of genotypes in the remaining classes. The reproductive adults showed genotypes spatially distributed in a random way. The values for the genetic bottleneck tests proved that the number of loci with excess observed heterozygosity was greater than expected. The SGS results reflect the restricted dispersion of the species, and the bottleneck tests reflect the reduction genotypes provoked by the anthropization of natural environments of C. prunifera.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-20T23:44:11Z No. of bitstreams: 1 AnnyGabrielleDaCruzChaves_DISSERT.pdf: 1741227 bytes, checksum: 6fa35aa295516ed7c00ec3caaccad18c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-27T18:34:48Z (GMT) No. of bitstreams: 1 AnnyGabrielleDaCruzChaves_DISSERT.pdf: 1741227 bytes, checksum: 6fa35aa295516ed7c00ec3caaccad18c (MD5) / Made available in DSpace on 2017-03-27T18:34:48Z (GMT). No. of bitstreams: 1 AnnyGabrielleDaCruzChaves_DISSERT.pdf: 1741227 bytes, checksum: 6fa35aa295516ed7c00ec3caaccad18c (MD5) Previous issue date: 2016-12-12 / Este trabalho teve como objetivo diagnosticar a explora??o de lenha em ?reas com Plano de Manejo Florestal Sustent?vel (PMFS) na Caatinga do Estado do Rio Grande do Norte. A coleta dos dados foi realizada entre 2015 e 2016, por meio de entrevistas com uma amostra de propriet?rios de 30 ?reas com PMFS e aplica??o de question?rio. Cerca de 63,3% dos PMFS tinham ?rea at? 750 ha, com produtividade variando entre 83 e 263 st/ha. A maioria (70%) tinha at? tr?s anos de atividade de explora??o e o principal produto explorado foi a lenha para consumo direto. O corte da lenha estava sendo terceirizado em 83,3% das ?reas e realizado pelos propriet?rios nas demais. Grande parte dos propriet?rios (43,3%) encontrou dificuldade para contrata??o de pessoal capacitado para o corte, que foi realizado com motosserra em 66,7% das propriedades e com machado e foice em 13,3%. Em 30% das ?reas havia explora??o ilegal de lenha antes do PMFS e em 63,3% das propriedades a Reserva Legal foi demarcada por ocasi?o da elabora??o do PMFS. Para 87,7% dos propriet?rios entrevistados o manejo florestal sustent?vel foi considerado economicamente interessante. Em rela??o ?s principais dificuldades encontradas, 80% dos propriet?rios citaram a falta de fiscaliza??o da explora??o e do com?rcio de lenha clandestina e os demais citaram a demora da autoriza??o pelo ?rg?o ambiental para o in?cio das atividades de explora??o. Apesar das dificuldades, a maioria dos propriet?rios declarou que pretende continuar com o manejo florestal. / The aim of this study was to diagnostic the logging practices in areas showing a Sustainable Forest Management Plan (SFMP) from Caatinga in the State of Rio Grande do Norte, Brazil. Data were collected between 2015 and 2016, by interviews with farm owners from 30 areas that showed a SFMP and by application of a questionnaire. About 63,3% of SFMP had an area up to 750 ha, with productivity varying between 83 and 263 st/ha. The majority (70%) had up to three years of exploration activity and the main explored product was firewood for direct consumption. The wood slashing was being outsourced in 83% of the areas and accomplished by the farm owners in the others. Most of the farm owners (43,3%) found obstacles to hire trained workforce for slashing, which was performed using chainsaw in 66,7% of the properties and using axe and sickle in 13,3% of the properties. In 30% of the areas, there was an illegal exploration of firewood before the SFMP and in 63,3% of the properties the Legal Reserve was delimited by the occasion of SFMP elaboration. To 87,7% of farm owners that were interviewed, the sustainable forest management was considered economically interesting. Regarding the main obstacles found, 80% of the farm owners mentioned the lack of inspection of the exploration and the clandestine trade of firewood, and the others mentioned the delay of authorization by the environmental agency for starting the exploration activities. Despite these obstacles, most of the owners stated that they intend to keep the forest management.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-05-08T23:59:12Z No. of bitstreams: 1 DanielFerreiraDaCosta_DISSERT.pdf: 447435 bytes, checksum: 3f684603b1cf2fc0e045701ddabedf68 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-05-09T00:09:37Z (GMT) No. of bitstreams: 1 DanielFerreiraDaCosta_DISSERT.pdf: 447435 bytes, checksum: 3f684603b1cf2fc0e045701ddabedf68 (MD5) / Made available in DSpace on 2017-05-09T00:09:37Z (GMT). No. of bitstreams: 1 DanielFerreiraDaCosta_DISSERT.pdf: 447435 bytes, checksum: 3f684603b1cf2fc0e045701ddabedf68 (MD5) Previous issue date: 2014-12-15 / A esp?cie Hancornia speciosa Gomes ? nativa do Brasil com ampla distribui??o no territ?rio nacional. Seu fruto ? bastante apreciado pelas popula??es locais, sendo utilizado para fabrica??o de doces, sorvetes e polpas. O crescimento urbano e a expans?o agr?cola favoreceram ? fragmenta??o das ?reas florestais onde a esp?cie ocorre, com a consequente redu??o do tamanho populacional, podendo ocasionar s?rias implica??es para a manuten??o da esp?cie a longo prazo. O objetivo deste estudo foi avaliar a diversidade gen?tica remanescente em sete popula??es de H. speciosa do estado do Rio Grande do Norte, ap?s selecionar marcadores de DNA entre repeti??es de sequ?ncias simples do genoma (ISSR). Na avalia??o da qualidade do DNA, o material gen?tico obtido a partir do caule apresentou pureza semelhante ao extra?do da folha, obtendo valores para a raz?o entre as absorv?ncias (A260/A280) de 1,46 para o caule e de 1,42 para a folha, ficando, ambos, um pouco abaixo do valor considerado ?timo que ? entre 1,5 e 2,5. O tecido caulinar apresentou DNA de qualidade para an?lises moleculares da esp?cie. Foram testados 19 primers ISSR onde seis foram selecionados (UBC 808, UBC 810, UBC 826, UBC 827, UBC 841, UBC 842) por apresentarem locos n?tidos, inequ?vocos e em maior n?mero, totalizando 63 locos, sendo que 30 (47,62%) apresentaram polimorfismo. O valor de PIC (conte?do de informa??es polim?rficas) para os primers selecionados atingiu a m?dia de 0,37, variando de 0,26 a 0,44, indicando que s?o ?teis para avaliar a diversidade gen?tica da esp?cie. Para o total das popula??es, o n?mero de locos polim?rficos foi de 57 (81,43%), com o n?mero total de alelos efetivos (Ne) 1,493. A diversidade gen?tica de Nei (He) foi de 0,287 e o ?ndice de Shannon (I) o valor de 0,429. Entre as popula??es o n?mero de locos polim?rficos foi considerado baixo, variando de 29 (41,43%) na popula??o Cotovelo, ? 33 (47,14%) em Maca?ba. Os ?ndices de diversidade He e I para cada popula??o variou respectivamente de 0,161 e 0,237 na popula??o Parque das Dunas ? 0,206 e 0,294 na popula??o Maca?ba. De acordo com a an?lise bayesiana os gen?tipos foram divididos em cinco grupos distintos (K = 5). Os padr?es observados para diversidade al?lica indicam a ocorr?ncia de gargalo gen?tico em todas as popula??es, de acordo com o modelo de passos de muta??o. O modelo de alelos infinitos revelou desequil?brio entre muta??o e deriva gen?tica apenas na popula??o Parque das Dunas. Os ?ndices de fluxo g?nico (Nm) revelaram troca de alelos entre todas as popula??es. Os resultados obtidos sugerem que a diversidade gen?tica est? distribu?da em diversas popula??es, sendo essencial a conserva??o das ?reas de sua ocorr?ncia para a manuten??o da diversidade gen?tica da esp?cie. / The Hancornia speciosa Gomes is a native of Brazil with wide distribution in the country. Its fruit is well appreciated by local people and is used for the manufacture of sweets, ice creams and pulps. Urban growth and agricultural expansion led to fragmentation forest areas where the species occurs, with a consequent reduction in population size, which can cause serious implications for the maintenance of long-term species. The objective of this study was to evaluate the remaining genetic diversity in seven populations of H. speciosa at Rio Grande do Norte state. In DNA's quality evaluation, the genetic material obtained from stems showed similar purity to the extracted sheet, obtaining values for the ratio between the absorbance (A260/A280) of 1.46 for the stem and 1.42 for the sheet, both were slightly below the value considered optimal which is between 1.5 and 2.5. The stem tissue showed DNA quality for molecular analyzes of the species. For the selection, 19 ISSR primers were tested, six of them were selected (UBC 808, UBC 810, UBC 826, UBC 827, UBC 841, UBC 842), for presenting clear locus, unambiguous and in great numbers, totaling 63 locus, and 30 (47.62%) showed polymorphism. The PIC value (polymorphic content information) for the selected primers averaged 0.37, ranging from 0.26 to 0.44, indicating that they are useful to evaluate the genetic diversity of the species. For the total population, the number of polymorphic locus was 57 (81.43%), with the total number of effective alleles (Ne) 1.493. The genetic diversity of Nei (He) was 0.287 and the Shannon index (I) was 0.429. Among populations the number of polymorphic locus was considered low, ranging from 29 (41.43%) in Cotovelo's population, to 33 (47.14%) in Maca?ba. The diversity indices He and I for each population ranged respectively 0.161 and 0.237 in Parque das Dunas's population to 0.206 and 0.294 in Maca?ba's population. According to the Bayesian analysis, the genotypes were divided into five groups (K = 5). The patterns observed in allelic diversity indicate the occurrence of bottleneck in all populations, according to the model of mutation steps. The infinite alleles model revealed imbalance between mutation and genetic drift only in the Parque das Dunas's population. The gene flow rates (Nm) revealed an exchange of alleles between all populations. The results suggest that genetic diversity is distributed among different populations, it is essential to conservation of areas of its occurrence to maintain the genetic diversity of the species.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-27T17:39:00Z No. of bitstreams: 1 MariaLuizaDeSouzaMedeiros_DISSERT.pdf: 778297 bytes, checksum: 3012a0a9e0e06a0f632900e02f88e311 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-29T20:16:49Z (GMT) No. of bitstreams: 1 MariaLuizaDeSouzaMedeiros_DISSERT.pdf: 778297 bytes, checksum: 3012a0a9e0e06a0f632900e02f88e311 (MD5) / Made available in DSpace on 2016-06-29T20:16:49Z (GMT). No. of bitstreams: 1 MariaLuizaDeSouzaMedeiros_DISSERT.pdf: 778297 bytes, checksum: 3012a0a9e0e06a0f632900e02f88e311 (MD5) Previous issue date: 2015-12-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A avalia??o do vigor de sementes ? um fator importante para a detec??o de lotes de sementes de alta qualidade, de modo que o desenvolvimento de procedimentos para avaliar o potencial fisiol?gico tem sido importante ferramenta dentro de programas de controle de qualidade de sementes. Nesse sentido, este trabalho teve como objetivo adequar as metodologias dos testes de envelhecimento acelerado, condutividade el?trica e lixivia??o de pot?ssio para a avalia??o do vigor de sementes de Moringa oleifera LAM.. Para tanto, quatro lotes de sementes foram submetidos aos testes de germina??o, emerg?ncia de pl?ntula, ?ndice de velocidade de emerg?ncia, primeira contagem de emerg?ncia, comprimento e massa seca de pl?ntulas e teste frio, para a sua caracteriza??o fisiol?gica, al?m dos testes de envelhecimento acelerado, condutividade el?trica e lixivia??o de pot?ssio. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repeti??es de 50 sementes, e as m?dias comparadas pelo teste de Tukey a 5% de probabilidade, sendo realizada a an?lise de regress?o polinomial no teste de condutividade el?trica. Para o teste de envelhecimento acelerado, foram estudados os per?odos de envelhecimento de 12, 24 e 72 horas, a 40, 42 e 45 ?C. Para o teste de condutividade el?trica, utilizou-se a temperatura de 25 ?C por per?odos de 4, 8, 12, 16 e 24 horas de imers?o, em 75 e 125 mL de ?gua destilada, utilizando-se 25 e 50 sementes e, para o teste de lixivia??o de pot?ssio, utilizou-se amostras de 25 e 50 sementes, colocadas em copos pl?sticos contendo 70 e 100 mL de ?gua destilada ? 25 ?C por per?odos de 1, 2, 3, 4, 5 e 6 horas. A partir dos resultados obtidos, pode-se inferir que as metodologias que melhor se ajustaram para o teste de envelhecimento acelerado em sementes de moringa foram a temperatura de 40 ?C por 12 e 72 horas, 42 ?C a 72 horas e 45 ?C a 24 horas. Para o teste de condutividade el?trica em sementes de moringa, a combina??o de 50 sementes em 75 mL de ?gua destilada por per?odo de embebi??o de 4 horas e, 50 sementes em 125 ml por 4 horas foram eficiente para a diferencia??o dos lotes de sementes de moringa quanto ao vigor e, para o teste de lixivia??o de pot?ssio em sementes de moringa, a combina??o de 50 sementes /100 mL de ?gua destilada permitiu a separa??o dos lotes em quatro n?veis de vigor, a partir de 2 horas de imers?o, mostrando-se promissor na avalia??o da qualidade de sementes de moringa. / The evaluation of seed vigor is an important factor for detection of lots of high quality seeds, so that development of procedures to evaluate the physiological potential has been an important tool in quality control programs seeds. In this sense the study aimed to adapt the methodologies of accelerated aging, electrical conductivity and potassium leaching to evaluate Moringa oleifera seed vigor LAM.. Therefore, four lots of moringa seeds were subjected to the germination tests, seedling emergence, speed of emergence index, emergence first count, length and dry mass of seedlings and cold test for their physiological characterization, in addition to accelerated aging, electrical conductivity and potassium leaching. The experimental design was completely randomized with four replications of 50 seeds and the means compared by Tukey test at 5% probability. For accelerated aging the periods were studied aging 12, 24 and 72 hours at 40, 42 and 45?C. For the electrical conductivity test was used to a temperature of 25?C for periods of 4, 8, 12, 16 and 24 hours of immersion in 75 to 125 mL of distilled water, using 25 to 50 seeds, and for potassium leaching test samples were used 25 to 50 seeds, placed in plastic cups containing 70 and 100 mL of distilled water at 25?C for periods of 1, 2, 3, 4, 5 and 6 hours. From the results obtained, it can be inferred that the methods best fit for the accelerated aging test Moringa seeds were a temperature of 40?C for 12 to 72 hours, 42?C 72 hours 45?C 24 hours . In the electrical conductivity test Moringa seeds, the combination of 50 seeds in 75 mL distilled water for a period of immersion of 4 hours and 50 seeds in 125 mL of 4 hours were efficient for the differentiation of lots of Moringa seeds as to vigor and for potassium leaching test moringa seeds, the combination of 50 seeds in 100mL of distilled water allowed the separation of lots of four levels of vigor, at 2 hours of immersion, showing promise in evaluate the quality of moringa seeds.