科研之友
微信
新浪微博
Facebook
分享链接
摘要
the effect of the winter cover crops rye, oat, ryegrass, vetch and fodder radish (and their mixtures) in no-tillage systems was investigated on soil cover, cover crop biomass and summer weed biomass during the critical competition stage with common bean. bean yield was also evaluated. the experimental design was randomized complete blocks and four repetitions. the highest soil cover during winter was observed in the treatments rye vetch, rye vetch fodder radish and oat vetch. the highest values of cover crops biomass production were observed in the treatments rye vetch fodder radish. weed suppression was higher in the ryegrass monoculture and in the rye vetch fodder radish association, and there was no correlation between cover crop biomass and summer weed suppression; the best bean yields were achieved with the following treatments: ryegrass in monoculture, oat in monoculture and rye vetch, producing 1,950, 1,730 e 1,790 kg ha-1 respectively. the monocultures of ryegrass and oat showed the lowest costs with seeds and the highest economic returns.
