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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Manejo da irriga??o com Irrig?s?, tanque Classe A e um sistema autom?tico de baixo custo no cultivo org?nico de alface

GON?ALVES, Fab?ola Vieira 19 February 2013 (has links)
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-11-23T17:12:33Z No. of bitstreams: 1 2013 - Fab?ola Vieira Gon?alves.pdf: 1632318 bytes, checksum: 51fa49c5b0f181ff4cbe5be8d6fa272f (MD5) / Made available in DSpace on 2018-11-23T17:12:33Z (GMT). No. of bitstreams: 1 2013 - Fab?ola Vieira Gon?alves.pdf: 1632318 bytes, checksum: 51fa49c5b0f181ff4cbe5be8d6fa272f (MD5) Previous issue date: 2013-02-19 / CAPES / The objective of the present research was to compare different techniques of irrigation scheduling. The experiment was conducted in 2012 on the premises of SIPA (Integrated Agroecological Production System), located in Serop?dica, state of Rio de Janeiro. The cultivation of lettuce was developed in a randomized complete blocks design with four treatments randomized in six replicates, totalizing 24 plots. The treatments consisted of four different managements of irrigation, characterized by the use of automatic irrigation device in two unevenness of pressostate (0.90 m and 1.20 m), Irrigas? system and Class A pan. It were evaluated data of temperature and air humidity, soil moisture, irrigation depth, water use efficiency and crop productivity, beyond production variables - fresh and dry weight of shoot, head height and diameter, leaf area. The production variables studied were subjected to analysis of variance using the F test. Data analysis showed that there wasn?t significant difference between the production variables evaluated and the irrigation depth did not differ significantly between treatments; although differences have been observed in the frequency of irrigation among the treatments had no irrigation schedule pre-established, it is not possible to establish a fixed interval of days to describe them. The data water use efficiency in the treatment Class A pan, AAI90 (9kPa), Irrigas?, AAI120 (12kPa), (241,4; 217,9; 205,5; 267,1 kg ha-1 mm-1, respectively) as well as for crop yield (32,80; 28,86; 28,80; 35,45 ton ha-1), are close to the values commonly found in the literature for lettuce varieties from the same study group. Thus it is concluded based on direct responses obtained from crops, all management methodologies evaluated were effective for growing lettuce, although they showed marked differences regarding the operation, which could be a deciding factor in choosing the farmer by what methodology to use.? / O presente estudo teve como objetivo comparar diferentes t?cnicas de manejo da irriga??o na cultura da alface (Lactuca sativa L.) O experimento foi conduzido em 2012, nas instala??es do SIPA (Sistema Integrado de Produ??o Agroecol?gica), localizado no munic?pio de Serop?dica-RJ. O cultivo da alface foi desenvolvido em delineamento experimental de blocos ao acaso (DBC), com 4 tratamentos casualizados em 6 blocos, totalizando 24 parcelas experimentais. Os tratamentos constitu?ram-se por quatro diferentes manejos da irriga??o, caracterizados pelo uso de um acionador artesanal de baixo custo para irriga??o (AAI) em 2 tens?es distintas de ?gua no solo (9kPa e 12kPa), sistema Irrig?s? e tanque Classe A. Foram avaliados dados de temperatura e umidade do ar, umidade do solo, l?mina aplicada, efici?ncia no uso da ?gua e produtividade da cultura, al?m das vari?veis de produ??o: massa fresca e massa seca da parte a?rea, di?metro e altura da cabe?a, ?rea foliar de cada planta. As vari?veis de produ??o estudadas foram submetidas ? an?lise de vari?ncia utilizando o teste F. A an?lise dos dados demonstrou que n?o houve diferen?a significativa entre as vari?veis de produ??o avaliadas e, as l?minas aplicadas n?o diferiram de forma expressiva entre os tratamentos; muito embora tenha se observado diferen?as na frequ?ncia da irriga??o, entre os tratamentos que n?o tinham turno de rega pr?-estabelecido; n?o sendo poss?vel estabelecer um intervalo fixo de dias para descrev?-los. Os dados de efici?ncia no uso da ?gua nos tratamentos Tanque, AAI90 (9kPa), Irrig?s, AAI120 (12kPa); (241,4; 217,9; 205,5; 267,1 kg ha-1 mm-1, respectivamente) assim como, para produtividade da cultura (32,80; 28,86; 28,80; 35,45 ton ha-1), est?o pr?ximos ? valores comumente encontrados na literatura para variedades de alface do mesmo grupo em estudo. Dessa forma conclui-se com base nas respostas diretas obtidas dos cultivos, que todas as metodologias de manejo avaliadas foram eficientes para o cultivo de alface, embora tenham apresentado diferen?as marcantes quanto ? operacionalidade, o que poder? ser um fator decisivo no momento da escolha do agricultor por qual metodologia utilizar.
2

Avalia??o do desempenho da cultura da alface (Lactuca sativa) cultivada em sistema org?nico de produ??o, sob diferentes l?minas de irriga??o e coberturas do solo. / Evaluation of the acting of the culture of the lettuce (Lactuca sativa) cultivated in organic system of production, under different irrigation sheets and coverings of the soil.

Lima, M?rcio Emanoel de 28 February 2007 (has links)
Made available in DSpace on 2016-04-28T14:58:33Z (GMT). No. of bitstreams: 1 2007- Marcio Emanoel de Lima.pdf: 716082 bytes, checksum: 776f00d9f4cf02d4e31b2cbd8d2f14ab (MD5) Previous issue date: 2007-02-28 / The present work had like objective study the effect of different levels of irrigation handled on the basis of the evaporation of the tank Class TO in the growth and performance of the lettuce (Lactuca sativa) cultivated in different epochs of the year in soil with and without utilization of dead cover. They were driven two series of experiments evaluating the effect of different levels of water in the first phase they determined itself the growth rates of the culture and in the second one evaluated the performance of the lettuce cultivated in a soil with and without utilization of dead cover. Both the series were carried out in the experimental area of the SIPA (System Integrated of output Agroecol?gica), located in the town of Serop?dica-Rio de Janeiro. The experimental delineation adopted in the first essay was in randomized blocks, with 5 handlings (25, 50, 80, 100 and 115% of the evapotranspira??o of the culture - ETc) and four repetitions, totalling up 20 experimental units containing 44 plants by installment. They were carried out collections of the plants during the cycle of the culture to the 10, 16, 22, 28 and 32 days after transplant (DAT), with an aim to determine the growth rates of them plants by the functional approach, being analyzed the variables area foliar and batter drought of the plants. To the 32 DAT was characterized the productivity of the culture by the analysis of the variables area foliar, fresh batter, number of sheets and diameter of the head. The culture presented a slow growth to the cultivation day 22o, being observed, from this date, a bigger accumulation of biomassa and increase of area foliar. The handling that replaced a sheet of 80% ETc provided a better performance of the culture regarding the productivity in all the variables analyzed, but was not possible observe significant differences between the handlings, due to humidity of soil to remain homogeneous during the conduction of the experiment. In the second phase, were driven two simultaneous experiments, being applied 5 levels of irrigation (25, 50, 80, 100 and 115% ETc), in two conditions of cover of him soil: soil n? and soil covered with straw of leguminous plant gliric?dia (Gliricidia sepium). The delineation adopted was in randomized blocks, with 5 handlings (sheets of irrigation) and 4 repetitions. After it attend all the of the statistical viewpoint, was carried out a joint analysis of the facts, with regression for the irrigation level variable, and test F for the variable dead cover. For the variables analyzed, in the system of plantation with dead cover had an increase in the area foliar, fresh batter and number of sheets to the level of 100% ETc and for the level of 115%, had a decrescimento of the same, due to the excess of humidity. Utilizing the equations adjusted, the maximum values of the variables studied were observed in the break of the sheets of irrigation 80 and 100% of the ETc. In the system of plantation without dead cover, the levels of irrigation analyzed were not sufficient for manifest the maximum performance of the culture. In the joint analysis for the variable fresh batter, the system of cultivation with utilization of dead cover was over the without cover differentiating estatisticamente level with 5% probability by the test F. Only not they were observed statistical differences between the corresponding sheets to 25 and 115% ETc, showing that only the utilization of dead cover is not sufficient for obtaining of better productivity. / O presente trabalho teve como objetivo estudar o efeito de diferentes n?veis de irriga??o manejada com base na evapora??o do tanque Classe A no crescimento e desempenho da alface (Lactuca sativa) cultivada em diferentes ?pocas do ano em solo com e sem utiliza??o de cobertura morta. Foram conduzidas duas s?ries de experimentos avaliando o efeito de diferentes n?veis de ?gua, na primeira etapa determinaram-se as taxas de crescimento da cultura e na segunda avaliou o desempenho da alface cultivada em um solo com e sem utiliza??o de cobertura morta. Ambas as s?ries foram realizadas na ?rea experimental do SIPA (Sistema Integrado de produ??o Agroecol?gica), localizado no munic?pio de Serop?dica-RJ. O delineamento experimental adotado no primeiro ensaio foi de blocos casualizados, com 5 tratamentos (25, 50, 80, 100 e 115 % da evapotranspira??o da cultura - ETc) e quatro repeti??es, totalizando 20 unidades experimentais contendo 44 plantas por parcela. Foram realizadas coletas das plantas durante o ciclo da cultura aos 10, 16, 22, 28 e 32 dias ap?s transplantio (DAT), com vista a determinar as taxas de crescimento das plantas pelo m?todo funcional, sendo analisadas as vari?veis ?rea foliar e massa seca das plantas. Aos 32 DAT foi caracterizada a produtividade da cultura pela an?lise das vari?veis ?rea foliar, massa fresca, n?mero de folhas e di?metro da cabe?a. A cultura apresentou um crescimento lento at? o 22o dia de cultivo, sendo observado, a partir desta data, um maior ac?mulo de biomassa e aumento de ?rea foliar. O tratamento que repunha uma l?mina de 80% ETc proporcionou um melhor desempenho da cultura em rela??o ? produtividade em todas as vari?veis analisadas, mas n?o foi poss?vel observar diferen?as significativas entre os tratamentos, devido a umidade do solo permanecer homogenia durante a condu??o do experimento. Na segunda etapa, foram conduzidos dois experimentos simult?neos, sendo aplicados 5 n?veis de irriga??o (25, 50, 80, 100 e 115 % ETc), em duas condi??es de cobertura do solo: solo n? e solo coberto com palha de leguminosa gliric?dia (Gliricidia sepium). O delineamento adotado foi de blocos casualizados, com 5 tratamentos (l?minas de irriga??o) e 4 repeti??es. Ap?s atender todas as pressuposi??es do ponto de vistas estat?stico, foi realizada uma an?lise conjunta dos dados, com regress?o para a vari?vel n?vel de irriga??o, e teste F para a vari?vel cobertura morta. Para as vari?veis analisadas, no sistema de plantio com cobertura morta houve um aumento na ?rea foliar, massa fresca e n?mero de folhas at? o n?vel de 100 % ETc e para o n?vel de 115%, houve um decrescimento das mesmas, devido ao excesso de umidade. Utilizando as equa??es ajustadas, os valores m?ximos das vari?veis estudadas foram observados no intervalo das l?minas de irriga??o 80 e 100 % da ETc. No sistema de plantio sem cobertura morta, os n?veis de irriga??o analisados n?o foram suficientes para manifestar o m?ximo rendimento da cultura. Na an?lise conjunta para a vari?vel massa fresca, o sistema de cultivo com utiliza??o de cobertura morta foi superior ao sem cobertura diferenciando estatisticamente ao n?vel de 5 % probabilidade pelo teste F. Somente n?o foram observadas diferen?as estat?sticas entre as l?minas correspondentes a 25 e 115 % ETc, demonstrando que somente a utiliza??o de cobertura morta n?o ? suficiente para obten??o de melhores produtividades.
3

CULTIVO DA BERINJELA (Solanum melongena L.) EM MANEJO ORG?NICO SOB DIFERENTES SISTEMAS DE CULTIVO E L?MINAS DE IRRIGA??O NO MUNIC?PIO DE SEROP?DICA-RJ / Cultivation of eggplant (Solanum melongena L.) in organic management systems in different culture and blades in the municipality of irrigation Serop?dica-RJ. UFRRJ

Lima, M?rcio Emanoel de 03 December 2009 (has links)
Made available in DSpace on 2016-04-28T14:58:55Z (GMT). No. of bitstreams: 1 Marcio E Lima .pdf: 9019810 bytes, checksum: 89a1e038ffab0307e67d30879c9c3fe2 (MD5) Previous issue date: 2009-12-03 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / This study aimed to: determine the productivity and efficiency of water use of eggplant crop under different irrigation levels in the system of no-tillage cultivation (and intercropped with a legume crop); determine the crop coefficients, evapotranspiration maximum growth of eggplant crop in no-tillage system with the addition of mulch and soil with conventional tillage with plowing and harrowing. The work was performed in the years 2007-2008, the SIPA (Integrated Production Agroecological), and conducted two series of experiments. In 2007 was established the culture of eggplant in a total area of 576 m2, using randomized block design in split plots, with treatments in the plot (four irrigation levels) and subplot (two cropping systems - consortium and cowpea with monoculture). The eggplant-cowpea intercropping did not significantly affect the yield of eggplant in organic management in notillage system. The eggplant crop responds to different irrigation affecting business productivity and total, were not observed, however, significant differences in the number of fruits per plant. In 2008 a second experiment was conducted using a randomized design (CRD) with two treatments (cultivation system: direct and conventional) and five replications. There were no significant differences in yield of eggplant in the two cropping systems, and the marketable fruit yield equal to 47.42 Mg ha-1 in PD and 47.91 Mg ha-1 on PC. The coefficients of eggplant crop cultivation for the DP system were 0.83 (from transplanting to flowering), 0.77 (from flowering to fruiting), 0.90 (fruiting the first harvest) and 0.97 (the first harvest at the end of the cycle). For the PC system, the crop coefficients were respectively 0.81, 1.14, 1.17 and 1.05. The water consumption of eggplant was 342.2 and 388.1 mm for the PD and PC, respectively, during 134 days of cultivation of eggplant. The maximum efficiency of water use (considering irrigation + precipitation) was 8.17 kg m-3 for the PD and 7.66 kg m-3 for the PC. The growth analysis showed that the conventional tillage system showed maximum accumulation of dry matter to 127 DAT with an estimated value of 454.28 g m-2. For no-till, the maximum estimated value was 369.81 g m-2 at 124 DAT. The largest leaf area index (LAI) was estimated to be 2.84 m2 m-2 to 130 DAT for conventional tillage and 2.96 m2 m-2 for the till. The maximum height of plants was 88.66 and 95.20 cm for NT and CT at 138 DAT. / O presente trabalho teve como objetivos: Determinar a produtividade e a efici?ncia do uso da ?gua da cultura da berinjela em fun??o de diferentes l?minas de irriga??o no sistema de cultivo de plantio direto (consorciada com uma leguminosa e solteira); Determinar os coeficientes de cultivo, evapotranspira??o m?xima e o crescimento da cultura da berinjela, no sistema de plantio direto com adi??o de palhada e em solo com o preparo convencional com ara??o e gradagem. O trabalho foi executado nos anos de 2007-2008, no SIPA (Sistema Integrado de Produ??o Agroecol?gica), sendo conduzidas duas s?ries de experimentos. Em 2007 foi implantada a cultura da berinjela em uma ?rea total de 576 m2, utilizando o delineamento de blocos casualizados, no esquema de parcelas subdivididas, sendo os tratamentos na parcela (4 l?minas de irriga??o) e na subparcela (2 sistemas de cultivo cons?rcio com caupi e monocultivo). O cons?rcio berinjela-feij?o caupi n?o influenciou significativamente a produtividade da cultura da berinjela em manejo org?nico no sistema de plantio direto. A cultura da berinjela responde a diferentes l?minas de irriga??o afetando a produtividade comercial e total, n?o sendo observadas, no entanto, diferen?as significativas no n?mero de frutos por planta. Em 2008 foi conduzido um segundo experimento utilizando o delineamento inteiramente casualizado (DIC) com os dois tratamentos (sistema de cultivo: direto e convencional) e cinco repeti??es. N?o houve diferen?as significativas na produtividade da cultura da berinjela nos dois sistemas de cultivo, sendo a produ??o de frutos comerciais igual a 47,42 Mg ha-1 no PD e de 47,91 Mg ha-1 no PC. Os coeficientes de cultivo para cultura da berinjela no sistema de PD foram de 0,83 (do transplantio ao florescimento), 0,77 (do florescimento ? frutifica??o), 0,90 (da frutifica??o ? 1a colheita) e 0,97 (da 1a colheita ao final do ciclo). Para o sistema PC, os coeficientes de cultivo foram de, respectivamente, 0,81; 1,14; 1,17 e 1,05. O consumo h?drico da berinjela foi 342,2 e 388,1 mm para o PD e PC, respectivamente, durante 134 dias de cultivo da berinjela. A m?xima efici?ncia do uso da ?gua (considerando irriga??o + precipita??o) foi de 8,17 kg m-3 para o PD e de 7,66 kg m-3 para o PC. A an?lise de crescimento evidenciou que o sistema de plantio convencional apresentou o m?ximo acumulo de mat?ria seca estimada aos 127 DAT com valor de 454,28 g m-2. Para o plantio direto, o valor m?ximo estimado foi de 369,81 g m-2 aos 124 DAT. O maior ?ndice de ?rea foliar (IAF) estimado foi de 2,84 m2 m-2 aos 130 DAT para o plantio convencional e de 2,96 m2 m-2 para o plantio direto. A altura m?xima das plantas foi de 88,66 e 95,20 cm para o PD e PC aos 138 DAT.
4

Custos monet?rios do quiabeiro org?nico em fun??o de l?minas de irriga??o automatizada, ?pocas de cultivo e bombeamento solar fotovoltaico / Monetary costs of the organic okra as a function of automated irrigation slides, cultivation times and photovoltaic solar pumping

FORTUNA, Gabriel C?ssia 21 February 2017 (has links)
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-03-15T18:51:08Z No. of bitstreams: 1 2017 - Gabriel C?ssia Fortuna.pdf: 1043987 bytes, checksum: 6a9354d53e0a589be62528a21844130c (MD5) / Made available in DSpace on 2018-03-15T18:51:08Z (GMT). No. of bitstreams: 1 2017 - Gabriel C?ssia Fortuna.pdf: 1043987 bytes, checksum: 6a9354d53e0a589be62528a21844130c (MD5) Previous issue date: 2017-02-21 / CAPES / The work was carried out in the Integrated Agroecological Production System (SIPA), known as Fazendinha Agroecol?gica Km 47, in the city of Serop?dica - RJ, Brazil. The objective was to evaluate the productivity, development and economic viability of the okra (Abelmoschus esculentus) of summer, in regrowth driving and in winter cultivation, when submitted to automated irrigation slides and solar photovoltaic energy. An area of 225 m2 was used and the experimental design of randomized blocks with 4 irrigation slides was used, referring to different flows of drippers (2.0, 4.0, 6.0 and 8.0 Lh-1), Arranged in 5 blocks with 4 replicates, totalizing 20 experimental plots. Irrigation management was performed by the Simplified Irrigation Trigger (ASI). Two cultivation cycles were carried out and characterized as a summer crop (October 2015 to April 2016) and later regrowth (April to August 2016) and winter crop (June to September 2016). The total and commercial yields were evaluated in the three periods, as well as quality indices and crop development. The monetary costs were realized considering the costs of implantation and conduction of the crop and the selling prices practiced in the organic and conventional retail market (free markets) and in the wholesale market, being determined the net income, the rate of return and the index of profitability. The monetary costs of the photovoltaic system were calculated from the irradiance data during the cultivation period and the energy consumption of the pump. There was no significant difference between the treatments tested for all variables, except for total and commercial productivity in the eleventh week of winter cultivation. The analysis of monetary costs confirmed the production results, indicating that the lowest applied blade is responsible for the greater profitability and efficiency of water use, even commercializing the production by the values practiced in the conventional wholesale market. Likewise, there was a profitability also with the increment of the photovoltaic system in the total costs of the production system, being smaller, however, when compared to the use of the electric energy for the pumping of water. The minimum yields to be achieved in order to avoid losses were within the range of productivity expected for the crop, for the summer, winter and year of production in the three commercialization systems, even with the cost increase due to the use of solar energy. / O trabalho foi realizado no Sistema Integrado de Produ??o Agroecol?gica (SIPA), conhecido como Fazendinha Agroecol?gica Km 47, no munic?pio de Serop?dica ? RJ, e teve como objetivo avaliara produtividade, o desenvolvimento e a viabilidade econ?mica do quiabeiro (Abelmoschus esculentus) no cultivo de ver?o, na condu??o de rebrota e no cultivo de inverno, quando submetido a l?minas de irriga??o automatizada e energia solar fotovoltaica. Foi utilizada uma ?rea de 225 m2 e adotado o delineamento experimental de blocos ao acaso, com 4 l?minas de irriga??o, referentes a diferentes vaz?es de gotejadores (2,0; 4,0; 6,0 e 8,0 L.h-1), dispostas em 5 blocos com 4 repeti??es, totalizando 20 parcelas experimentais. O manejo da irriga??o foi realizado pelo Acionador Simplificado para Irriga??o (ASI). Dois ciclos de cultivo foram realizados e caracterizados como cultivo de ver?o (outubro de 2015 a abril de 2016) e posteriormente sua rebrota (abril a agosto de 2016) e pelo cultivo de inverno (de junho a setembro de 2016). Foram avaliadas nos tr?s per?odos, as produtividades total e comercial, al?m de ?ndices de qualidade e desenvolvimento da cultura. Os custos monet?rios foram realizados considerando os custos de implanta??o e condu??o da lavoura e os pre?os de venda praticados no mercado varejista org?nico e convencional (feiras livres) e no mercado atacadista, sendo determinados a renda l?quida, a taxa de retorno e o ?ndice de lucratividade. Os custos monet?rios do sistema fotovoltaico foram realizados a partir dos dados de irradi?ncia durante o per?odo de cultivo e do consumo energ?tico da bomba. N?o houve diferen?a significativa entre os tratamentos testados, para todas as vari?veis, exceto para a produtividade total e comercial na d?cima primeira semana do cultivo de inverno. A an?lise dos custos monet?rios confirmou os resultados de produ??o, indicando que a menor l?mina aplicada ? respons?vel pela maior lucratividade e efici?ncia do uso da ?gua, mesmo comercializando a produ??o pelos valores praticados no mercado atacadista convencional. Da mesma forma, houve rentabilidade tamb?m com o incremento do sistema fotovoltaico nos custos totais do sistema de produ??o, sendo menor, por?m, quando comparada ao uso da energia el?trica para o bombeamento de ?gua. As produtividades m?nimas a serem alcan?adas para que n?o ocorram preju?zos ficaram dentro da faixa de produtividade esperada para a cultura, para o cultivo de ver?o, inverno e ano de produ??o, nos tr?s sistemas de comercializa??o, mesmo com o incremento de custo devido ao emprego da energia solar.

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