选用96％精异丙甲草胺乳油、33％二甲戊乐灵乳油2种除草剂，结合地膜覆盖栽培进行甘薯田杂草防除效果试验。结果表明：覆盖黑色地膜和所用2种除草剂均可有效防除甘薯田杂草；30 d时，各措施对杂草的防除效果均在85％以上，以覆盖黑色地膜防效最高；45 d时，覆盖黑色地膜和透明地膜＋喷施33％二甲戊乐灵乳油对杂草的防除效果较好，杂草株防效、鲜质量防效均在90％以上；采用地膜覆盖或除草剂除草均能提高甘薯鲜薯产量，与空白对照相比，覆盖黑色地膜处理增产极显著，达到27．70％，透明膜＋除草剂的2个处理增产显著，分别为18.75％、21．33％；喷施除草剂但不覆地膜的2个处理增产不显著，分别为5．02％、6．79％。综合试验结果可知，甘薯黑色地膜覆盖栽培对甘薯田杂草防效与试验用除草剂效果相当，黑色地膜覆盖不但可有效防除甘薯田杂草，而且可提高鲜薯产量，值得推广。%The efficacy of two herbicides (96% s-metolachlor EC and 33% pendimethalin EC)combined with plastic film mulching cultivation for controlling weeds in sweet potato fields was studied.Both black plastic film mulching cultiva-tion and the two herbicides effectively controlled weeds in sweet potato fields.All treatments provided more than 85%control at 30 days after treatment,the best control being obtained with the black plastic mulching treatment.At 45 days after treatment,black plastic mulching and 33%pendimethalin EC effectively controlled weeds above 90%based on total strain and fresh weight.The use of plastic film mulching or herbicides increased fresh tuber yields.Compared with the CK,black plastic mulching significantly increased tuber yield by 28%as well as transparent plastic film mulching combed with herbicides that increased yield by 18%to 21%whereas herbicides without plastic film mulching only increased yield by 5% to 7%.Adoption of black plastic film cultivation should be promoted in sweet potato production for effectively controlling weeds and increasing fresh tuber yield.
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