不同浓度莠去津对谷子田间杂草的防除效果

Control Effect of Different Concentration of Atrazine on Weed in Millet Field

研究比较了不同浓度莠去津对谷子田间杂草的防除效果,为筛选适宜谷子生产的除草剂最佳使用浓度提供理论依据。结果表明:喷施25 d和40 d后,莠去津300 m L/0.067 hm^2处理株防效和鲜质量防效最好,鲜质量防效达到83.99%和87.35%,与喷施清水(CK)相比200 m L/0.067 hm^2处理增产效果最佳,增产率达到59.90%,300 m L/0.067 hm^2次之,因此200 m L/0.067 hm^2是谷子生产中莠去津(播后苗前喷药)使用的最佳浓度。

Compared the control effect of different concentration of atrazine（3~5 leaf stage） on weed in foxtail millet field,which provided theoretical basis for screening suitable herbicides concentration for foxtail millet production. As a result,after spraying 25 d and 40 d, plant control effect and fresh weight control effect were best by 300 m L/0.067 hm^2 processing, and fresh weight control effect reached 83.99% and 87.35%. Compared with spraying water（CK）, yield-increasing effect was best by 200 m L/0.067 hm^2 processing, increase rate 59.90%, following 300 m L/0.067 hm^2. Therefore, 200 m L/0.067 hm^2 was the best concentration of atrazine for millet production.