精异丙甲草胺对大麻田一年生杂草的防除效果

Control Effect of(S)-Metolachlor on Annual Weeds in Hemp Fields

为研究精异丙甲草胺在大麻田杂草化学防控中的使用效果,进行了960 g/L精异丙甲草胺EC适宜剂量筛选田间试验,并进行了试验示范。结果表明,960 g/L精异丙甲草胺EC 900 m L/hm2处理的药后50 d后株防效和鲜质量防效分别为81.68%、81.33%,麻籽增产率为45%,为最优施用剂量;在技术示范中,960 g/L精异丙甲草胺EC施用量为900 m L/hm2的处理大麻产量有所增加,但与对照药剂相比差异不显著。用该药剂的适宜剂量来防除大麻田杂草具有可行性。

To study the effect of(S)-Metolachlor on weed chemical control in hemp field,an efficacy experiment of 960 g/L(S)-Metolachlor was conducted in the field to screen the appropriate dose,and the selected dose was demonstrated.The results showed that when 960 g/L(S)-Metolachlor EC was applied at a dose of 900 mL/hm2,the plant control effect and fresh quality control effect were 81.68%and 81.33%,respectively,after 50 d,and the yield increase rate of flaxseed was 45%,so the dosage of 900 mL/hm2 was the optimal application dose.In the technology demonstration,compared with the control,the hemp yield of 960 g/L(S)-Metolachlor EC application dose of 900 mL/hm2 increased,but the difference was not significant,so it was feasible to control weeds in hemp field.