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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

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.
2

Cultivo org?nico de tomate em vasoponia e ambiente protegido com manejo da irriga??o por acionador autom?tico / Organic cultivation of tomatoes in potponics and greenhouse with irrigation management by controller automatic

GOMES, Daniela pinto 26 February 2016 (has links)
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2016-10-06T18:58:26Z No. of bitstreams: 1 2016 - Daniela Pinto Gomes.pdf: 2118994 bytes, checksum: df26092e9f2c17eb3ae1a9ff3e3aad9a (MD5) / Made available in DSpace on 2016-10-06T18:58:26Z (GMT). No. of bitstreams: 1 2016 - Daniela Pinto Gomes.pdf: 2118994 bytes, checksum: df26092e9f2c17eb3ae1a9ff3e3aad9a (MD5) Previous issue date: 2016-02-26 / CAPES / FAPERJ / This work entitled "Organic farming tomatoes in potponics and greenhouse with irrigation management by controller automatic" aimed to provide information to serve as a recommendation for a new tomato cultivation system potted and greenhouse with respect to inputs water and fertilizer, to ensure a sustainable production, mainly based on the use of residu?rios materials as a source of nutrients and automatic irrigation low cost. The specific objectives of this study were to assess: (a) the effect of different doses of wood ash and castor bean cake in the growth and productivity of tomato culture; and (b) the effect of different irrigation levels on growth and productivity of the tomato crop. Three experiments were conducted from 2013 to 2015 using a randomized block. In 2013, we evaluated the effect of five crecentes doses of wood ash and castor bean cake (160 g of ash and 90 g of castor bean cake per plant, 195 g of ash and 120 g of castor bean cake per plant, 230 g of ash and 140 g of castor bean cake per plant; 265 g of ash and 160 g of castor bean cake per plant, and 300 g of ash and 180 g of castor bean cake per plant) productivity of tomato cultivation. In 2014, in a factorial scheme (3 x 2), evaluated the effect of three wood ash levels (40, 80 and 120 g per plant) and two castor bean cake doses (140 and 280 g per plant) growth and productivity of the tomato crop. In 2015 we evaluated the effect of four irrigation levels (135, 165, 191 and 213 mm) on the growth and productivity of the tomato crop. The results in 2013 showed that the ash doses tested and castor bean cake did not influence the marketable productivity of tomato (1.24 to 1.59 kg per plant (24.8 to 31.8 t ha-1)). In 2014 most of the growth variables were positively influenced by the increase in wood ash and castor bean cake doses. Most marketable yield was obtained with the dose of 280 g of castor bean cake (1.99 kg per plant (39.8 t ha-1)), not significantly influenced by the ash doses. In 2015 most of the growth variables and marketable productivity were negatively with decreasing water depth. The level of 213 mm was responsible for greater marketable productivity (4.04 kg per plant (80.8 t ha-1)). / O presente trabalho intitulado ?Cultivo org?nico de tomate em vasoponia e ambiente protegido com manejo da irriga??o por acionador autom?tico? teve por objetivo proporcionar informa??es que sirvam de recomenda??o para um novo sistema de cultivo de tomate em vaso e em ambiente protegido, com rela??o aos insumos ?gua e fertilizante, visando uma produ??o sustent?vel, baseada principalmente na utiliza??o de materiais residu?rios como fonte de nutrientes e irriga??o automatizada de baixo custo. Os objetivos espec?ficos deste trabalho foram avaliar: (a) o efeito de diferentes doses de cinza e torta de mamona no crescimento e na produtividade da cultura do tomate; e (b) o efeito de diferentes l?minas de irriga??o no crescimento e na produtividade da cultura do tomate. Foram realizados tr?s experimentos no per?odo de 2013 a 2015 utilizando o delineamento experimental em blocos casualizados. Em 2013, avaliou-se o efeito de cinco doses crescentes de cinza e torta de mamona (160 g de cinza e 90 g de torta de mamona por planta; 195 g de cinza e 120 g de torta de mamona por planta; 230 g de cinza e 140 g de torta de mamona por planta; 265 g de cinza e 160 g de torta de mamona por planta; e 300 g de cinza e 180 g de torta de mamona por planta) na produtividade da cultura do tomate. Em 2014, em esquema fatorial (3 x 2), avaliou-se o efeito de tr?s doses de cinza (40, 80 e 120 g por planta) e duas doses de torta de mamona (140 e 280 g por planta) no crescimento e na produtividade da cultura do tomate. Em 2015 avaliou-se o efeito de quatro l?minas de irriga??o (135, 165, 191 e 213 mm) no crescimento e na produtividade da cultura do tomate. Os resultados obtidos em 2013 mostraram que as doses de cinza e torta de mamona n?o influenciaram significativamente a produtividade comercial do tomateiro (1,24 a 1,59 kg por planta (24,8 a 31,8 t ha-1)). Em 2014 a maioria das vari?veis de crescimento avaliadas foram influenciadas positivamente pelo aumento das doses de cinza e torta de mamona. A maior produtividade comercial foi obtida com a dose de 280 g de torta de mamona (1,99 kg por planta (39,8 t ha-1)), n?o sendo influenciada significativamente pelas doses de cinza. Em 2015 a maioria das vari?veis de crescimento e a produtividade comercial foram influenciadas negativamente com a diminui??o da l?mina de irriga??o. A l?mina de 213 mm foi a respons?vel pela maior produtividade comercial (4,04 kg por planta (80,8 t ha-1)).

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