Sistema org?nico de produ??o de mandioca consorciada com milho e caupi

• Ano de defesa: 2006
• Autor(a) principal: DEVIDE, Antonio Carlos Pries
• Orientador(a): Ribeiro, Raul de Lucena Duarte
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
• Programa de Pós-Graduação: Programa de P?s-Gradua??o em Fitotecnia
• Departamento: Instituto de Agronomia
• País: Brasil
• Palavras-chave em Português: Manihot esculenta; aduba??o verde; agricultura org?nica
• Palavras-chave em Inglês: green manure; organic agriculture
• Área do conhecimento CNPq: Agronomia
• Link de acesso: https://tede.ufrrj.br/jspui/handle/tede/505

Organic systems were evaluated for cassava root production directed to human comsuption in natura, at Serop?dica, Metropolitan Region of Rio de Janeiro State. Treatments consisted of: cassava ('IAC 576-70') single cropping and its intercropped with corn ('Eldorado'), cowpea ('Mau?') or corn plus cowpea. The organic management was standardized and the experimental area was submitted to artificial irrigation. Several phenological features were considered in the evaluations relating all three species under cultivation. Green (immature) corn ears were harvested at the point requiered for fresh marketing. The cowpea was included to function as green manure being cut at flowering and left on the soil surface. Both (corn and cowpea) species were sown between cassava rows, in an alternate design, following the first weeding of the main crop (cassava). The cultivar IAC 576-70 showed suitability with respect to organic management averaging approx. 31 Mg.ha-? of marketable roots. No significant differences were detected between cassava single cropping and any of the intercropping tested systems. Thus, the corn crop represented potential for additional income to the growers. Yield of Eldorado corn averaged 18.125 ears.ha-? correspponding to 5,1 Mg.ha-?. The harvested ears measured 19,5 cm of length by 4,5 cm of basal diameter (mean values) reaching the requirements for marketing, despite a certain frequency of grain failures at the apical end. Residues coming from cowpea cutting brought about an input close to 12 Mg.ha-1, which meant an expressive contribution in nutrient elements, specially nitrogen (about 44 kg N.ha-1). The legume crop, in addition, completely covered cassava inter-rows demonstrating its potential for controlling erosion and weeds.