几种除草剂对夏播大豆的安全性研究

Study on the Safety Aspects of Herbicides on the Summer Soybean

试验采用单因素随机区组设计,研究了乙草胺、扑草净、赛克、速收这几类除草剂单用及混配对夏播大豆安全性的影响。试验结果表明:乙草胺与赛克适量浓度(1.5 L/hm2+0.75 kg/hm2)混用处理效果最好。该处理有利于调节光分布,提高光合速率;子粒重量明显高于对照。研究表明:土壤处理除草剂能在最早时间防治杂草,改善田间群体结构,从而促进大豆生长发育,对产量提高具有重要作用;适当的除草剂混用,可降低用药量,对杂草可持续防治具有重要意义。

This paper studies the influence of respective application or mixed application of acetochl, prometryne, metribuzin and flumioxazin on the safety of summer soybean. And the results show that the best can be got by using the mixture of acetochl and metribuzin at the rate of 1.5L/ha ＋ 0.75 kg/hm^2. Through this way ,the distribution of light can be regulated, the photosynthesis rates can be increased, and the seed weight will be higher. Experiment reveals that soil-applied herbicide can kill weed during earlier stage and improve group structure and then promote the growth of soybean,which is important to increase the yield of soybean. Suitable mixture of herbicides can decrease the dose, which is important to the sustainable prevention of weed.