稻秆覆盖结合除草剂减量化使用对移栽豆角田杂草的控制效果

为了明确稻秆覆盖结合除草剂减量使用对移栽豆角田杂草的控制效果及对产量的影响，采用大田试验的方法，将乙草胺和二甲戊乐灵按常量（田间常规推荐剂量），半量（1/2 常量），1/4 量（1/4 常量）分别与稻秆覆盖相结合，调查不同处理对移栽豆角田杂草发生及豆角产量的影响。结果表明：从豆角移栽至收获，若仅用稻秆覆盖对豆角田杂草的株防效和鲜重防效分别为64.7%和61.9%；若将除草剂与稻秆相结合使用，从对总草的控制效果看，二甲戊乐灵各剂量与稻秆相结合均不同程度高于乙草胺相应剂量与稻秆相结合效果。二甲戊乐灵1/4 剂量与稻秆相结合对豆角田总草的株数和鲜重达到了较好的效果，分别为88.7%和83.9%，且具有一定的增产效果，增产率为320.0%。

Effect of rice straw mulching combined with herbicide reduction on weeds in transplanted cowpea field

Experiments were conducted by combining the rice straw mulching with herbicides reduction to know their effect on weeds in transplanted cowpea field. The results showed that rice straw covering before cowpea seedlings were transplanted could inhibit 64.7% of the weed strains and 61.9% of fresh weight development. However, if the rice straw covering combined with a quarter of the commended dose of pendimethalin, it can reach better efficiency to the total weeds in field than that of acetachlor combined with rice straw covering, and the efficiency of volume of weeds and fresh weight were 88.7% and 83.9%, respectively. And the yield of cowpea increased by 320.0%.