不同除草剂对高粱地杂草防除效果

Control Effect of Different Herbicides on Weeds in the Sorghum Field

为探索防治高粱田杂草的适宜除草剂类型及其对高粱的安全性,采用田间小区试验,分别进行了4种播后苗前封闭除草剂和9种苗后除草剂对高粱田杂草的防除效果、高粱生长的安全性评价以及对高粱产量的影响研究。结果表明:播后苗前封闭处理的药剂为38%莠去津和二甲戊灵混合组合,使用剂量为(1995 g+1950 m L)/hm2,苗后茎叶处理的有效药剂有50%二氯喹啉酸450 g/hm2+50%氯氟吡氧乙酸异辛酯900 m L/hm2、10%乙羧氟草醚450 m L/hm2+50%乙草胺1350 m L/hm2、50%氯氟吡氧乙酸异辛酯900 m L/hm2+50%乙草胺1350m L/hm2,或单施10%乙羧氟草醚450 m L/hm2。以上5种药剂对高粱田杂草有很好的防除效果且对高粱生长安全,高粱产量也有显著提高。

In order to explore suitable herbicide to prevent weeds in sorghum field and its safety, plot test was adopted and four kinds of closed herbicide applied after sowing and before seedling and 9 kinds of herbicide ap-plied after seedling were tested. Their controlling effect to weeds and their safety to sorghum and their influence on sorghum were studied. The results showed that suitable herbicide applied after sowing and before seedling was 38% Atrazine at 1995 g/hm2 mixed with Pendimethalin at 1950 mL/hm^2. Effective herbicides which were suitable to be applied after seedling included 50% Quinclorac at 450 g/hm^2 plus 50% Fluroxypr mepthyl at 900 mL/hm^2, 10% Flu-oroglycofen at 450 mL/hm^2 plus 50% Acetochlor at 1350 mL/hm^2, 50% Fluroxypr mepthy at 900 mL/hm^2plus 50% Acetochlor at 1350 mL/hm^2, or a single application of 10% Fluoroglycofen at 450 mL/hm^2. These 5 kinds of treatments achieved good controlling effect of weeds, and they were safe to sorghum and sorghum production also increased significantly.