avaliação de cultivares de soja, sob manejo orgânico, para fins de adubação verde e produção de grãos evaluation of soybean cultivars under organic management for green manuring and grain production
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2002
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Abstract
O objetivo deste trabalho foi avaliar o desempenho de seis cultivares de soja, sob manejo orgânico, para fins de adubação verde e produção de grãos. Utilizou-se delineamento experimental de blocos casualizados, com quatro repetições por tratamento (cultivar). Na época da colheita, 81 dias após a emergência das plântulas, todas as cultivares testadas (Celeste, Surubi, Campo Grande, Mandi, Lambari e Taquari) mostraram excelente nodulação, variando de 545 a 760 mg/planta de massa nodular seca. As cultivares Celeste e Taquari, que produziram, respectivamente, 8,33 e 7,12 t ha-1 de biomassa seca da parte aérea, apresentaram outras características agronômicas vantajosas, tais como: ciclo curto, alta acumulação de nutrientes (N, P, K, Ca e Mg) nos tecidos verdes e bom rendimento de sementes. Esses caracteres indicam potencial de 'Celeste' e 'Taquari' para adubação verde de verão em sistemas de agricultura orgânica. Cinco das cultivares avaliadas revelaram tendência ao acamamento, porém dentro de níveis aceitáveis. As cultivares Celeste, Surubi, Campo Grande, Mandi e Taquari suplantaram em 23%, 32%, 33%, 44% e 70%, respectivamente, a média nacional de produtividade de soja, estimada em 2.398 kg ha-1 nas últimas três safras.
The objective of this work was to evaluate the grain and aboveground biomass production of six soybean cultivars under organic management. A randomized block design was adopted with four replications per treatment (cultivar). By harvest time, 81 days after plants emergence, all tested cultivars (Celeste, Surubi, Campo Grande, Mandi, Lambari, and Taquari) had excellent nodulation ranging from 545 to 760 mg/plant of nodule mass (dry weight). The cultivars Celeste and Taquari, which yielded 8.33 and 7.12 t ha-1 of dry biomass, respectively, showed other advantageous agronomic characteristics such as: short cycle, a high accumulation of nutrients (N, P, K, Ca and Mg) in green tissues, and good seed setting. These traits indicated potential of 'Celeste' and 'Taquari' to be used as green manure summer crops in organic agriculture systems. Five of the cultivars revealed a tendency for lodging, however within acceptable levels. Cultivars Celeste, Surubi, Campo Grande, Mandi, and Taquari exceeded in 23%, 32%, 33%, 44%, and 70%, respectively, the Brazilian soybean grain yield average of 2,398 kg ha-1 of the last three years.
The objective of this work was to evaluate the grain and aboveground biomass production of six soybean cultivars under organic management. A randomized block design was adopted with four replications per treatment (cultivar). By harvest time, 81 days after plants emergence, all tested cultivars (Celeste, Surubi, Campo Grande, Mandi, Lambari, and Taquari) had excellent nodulation ranging from 545 to 760 mg/plant of nodule mass (dry weight). The cultivars Celeste and Taquari, which yielded 8.33 and 7.12 t ha-1 of dry biomass, respectively, showed other advantageous agronomic characteristics such as: short cycle, a high accumulation of nutrients (N, P, K, Ca and Mg) in green tissues, and good seed setting. These traits indicated potential of 'Celeste' and 'Taquari' to be used as green manure summer crops in organic agriculture systems. Five of the cultivars revealed a tendency for lodging, however within acceptable levels. Cultivars Celeste, Surubi, Campo Grande, Mandi, and Taquari exceeded in 23%, 32%, 33%, 44%, and 70%, respectively, the Brazilian soybean grain yield average of 2,398 kg ha-1 of the last three years.
| Reference Key |
padovan2002pesquisaavaliao
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| Authors | ;Milton Parron Padovan;Dejair Lopes de Almeida;José Guilherme Marinho Guerra;Raul de Lucena Duarte Ribeiro;Aly Ndiaye |
| Journal | proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006 |
| Year | 2002 |
| DOI |
10.1590/S0100-204X2002001200005
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