Sucessão de cultivo de feijão-arroz com doses de adubação nitrogenada após adubação verde, em semeadura direta
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Data
2003-01-01
Autores
Bordin, Luciano
Farinelli, Rogério [UNESP]
Penariol, Fernando Guido [UNESP]
Fornasieri Filho, Domingos [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Instituto Agronômico de Campinas
Resumo
O trabalho objetivou avaliar a viabilidade agronômica do cultivo de feijão bravo do Ceará (Canavalia brasiliensis), Crotalaria juncea cv IAC-KR1, milheto cv. BN-2 (Pennisetum glaucum), sorgo cv. AG-2501C e sorgo guiné (Sorghum bicolor tipo guinea), semeados no período de safrinha, em comparação com a área mantida no limpo. Após a dessecação, efetuada aos 70 dias de semeadura e posterior manejo dos adubos verdes, foram cultivados em semeadura direta, o feijoeiro de inverno e em sucessão, o arroz de terras altas, ambos associados às adubações nitrogenadas de 0, 25, 50 e 75 kg.ha-1 de N. Concluiu-se que as gramíneas possibilitaram maior produção de matéria seca e cobertura de solo. Com relação à cultura do feijão, a maior produtividade de grãos e componentes da produção foram obtidos nos tratamentos com leguminosas e doses de 50 e 75 kg.ha-1 de N. A C. juncea e a C. brasiliensis influenciaram positivamente na produtividade de arroz, juntamente com doses de 50 e 75 kg.ha-1 de N. Dentre as gramíneas, a sucessão com o milheto foi a que proporcionou maiores produtividades para o feijão e o arroz. A utilização dos sorgos AG-2501C e guiné ocasionaram diminuição dos componentes da produção e da produtividade de arroz.
A field trial was set up aiming to evaluate the effects of green cover and nitrogen fertilization on the sequential crops: common bean during the winter and upland rice during the summer. The experiment was arranged in split-plot experimental design with four replications. The main plots were green cover species (Canavalia brasiliensis, Crotalaria juncea cv. IAC-KR1, Pennisetum glaucum cv. BN-2, Sorghum bicolor cv. AG-2501C and Sorghum bicolor guinea), and a control plot kept weed free. These plants were sowed in March and mowed in May. The sub-plot were nitrogen rates as cover fertilization (0, 25, 50 and 75 kg.ha-1 of N). Common bean production was evaluated in winter season, and the best productions were observed in the plots with leguminous plants as green cover under 50 and 75 kg.ha-1 of N. The rice grain production increased in the plot with Crotalaria juncea and Canavalia brasiliensis under 50 and 75 kg.ha-1 of N. Among the grass plants, Pennisetum glaucum was the green cover that promoted the best production for both sequential crops. The rice grain production decreased in the plot with Sorghum bicolor cv. AG-2501C and Sorghum bicolor guinea.
A field trial was set up aiming to evaluate the effects of green cover and nitrogen fertilization on the sequential crops: common bean during the winter and upland rice during the summer. The experiment was arranged in split-plot experimental design with four replications. The main plots were green cover species (Canavalia brasiliensis, Crotalaria juncea cv. IAC-KR1, Pennisetum glaucum cv. BN-2, Sorghum bicolor cv. AG-2501C and Sorghum bicolor guinea), and a control plot kept weed free. These plants were sowed in March and mowed in May. The sub-plot were nitrogen rates as cover fertilization (0, 25, 50 and 75 kg.ha-1 of N). Common bean production was evaluated in winter season, and the best productions were observed in the plots with leguminous plants as green cover under 50 and 75 kg.ha-1 of N. The rice grain production increased in the plot with Crotalaria juncea and Canavalia brasiliensis under 50 and 75 kg.ha-1 of N. Among the grass plants, Pennisetum glaucum was the green cover that promoted the best production for both sequential crops. The rice grain production decreased in the plot with Sorghum bicolor cv. AG-2501C and Sorghum bicolor guinea.
Descrição
Palavras-chave
Phaseolus vulgaris L., Oryza sativa L., matéria seca, componentes da produção, rotação de culturas, Phaseolus vulgaris L., Oryza sativa L. yield components, dry weight, crop rotation
Como citar
Bragantia. Instituto Agronômico de Campinas, v. 62, n. 3, p. 417-428, 2003.