几种除草剂对红小豆田间杂草的防除效果及产量的影响

Effects of Several Herbicides on Weed Control and Grain Yield of Adzuki Bean in Field

采用田间小区试验方法,研究了3种土壤处理除草剂和3种茎叶处理除草剂单用及混合使用对红小豆田杂草的除草效果及产量的影响。结果表明,在9种不同除草剂组合中,除T1(40%氧氟乙草胺乳油播后苗前喷雾)和T4(40%氧氟乙草胺乳油播后苗前喷雾,12.5%拿捕净乳油苗后喷雾)组合的药害严重外,其他组合的药害程度均较轻,对产量影响不大。通过综合分析除草剂组合对小豆田的整体防效、株高、药害和红小豆产量的影响,结果认为,T6除草剂组合(33%二甲戊灵乳油播后苗前喷雾、25%氟磺胺草醚水剂+10%精喹禾灵乳油苗后喷雾)对小豆田杂草的防治效果较好,防效达到83.8%;其产量达到2 534 kg/hm^2,比对照增产331.7%,且增产效果显著,T6是红小豆田理想的除草剂组合。

The efficacy of three soil-applied herbicides,three stem and leaf treatment herbicide and mixtures of them on the yield and the control of weed was studied under field condition.The results showed that the degree of drug damag and the effect of yield were very light in other combinations without T1 combination(Ofloxacin acetochlor 40%EC spraying before sowing)and T4 combination(Ofloxacin acetochlor 40%EC spraying before sowing and sethoxydim 12.5%EC post-seedling spraying).By comprehensively analyzing the weed controlling effects and the plant height and the effects on the yield,the herbicide combination T6(Pendimethalin 33%EC spraying before sowing,Fomesafen 25%AS+Quizalofop-p 10%EC post-seedling spraying)had the best effect,control effect was 83.8%.Compared with the control,the yield of T6 reached 2 534 kg/hm2,increased production by 331.7%,the difference reached extremely significant level.So that,T6 was suitable herbicide combinution for adzuki bean field.