11种除草剂对全膜双垄沟播玉米田杂草的防治效果

为了明确11种除草剂对全膜双垄沟播玉米田杂草的防治效果,采用随机区组法开展了田间小区药效试验.结果表明：42％甲·乙·莠悬浮剂5625 mL/hm2、48％乙·莠可湿性粉剂3.75 kg/hm2和42％异丙草·莠悬浮剂4 125 mL/hm2对全膜双垄沟播玉米田杂草有较好的防效,其中,30 d和45d的株防效分别为92.9％、91.3％、92.3％和89.0％、88.0％、88.3％,45 d的鲜重防效分别为89.1％、88.2％、88.6％,显著优于其他药剂处理（P＜0.05）.同时,3种药剂处理玉米出苗整齐、生长良好、安全无药害发生,且分别比对照增产24.19％、22.04％、20.43％.

Weed Control Effect of 11 Herbicides in the Whole Film and Double Furrow Sowing Corn Field

The efficacy of eleven herbicides was determined under whole film and double furrow sowing in corn in a field experiment established as a randomized block design.Best weed control was obtained with alachlor o acetochlor o atrazine （42％ SC,5 625 mL/hm2）,acetochlor o atrazine （48％ WP,3.75 kg/hm2） and propisochlor o atrazine （42％ SC,4 125 mL/hm2）.At 45 d and 30 d after application they provided control at levels of 93％,91％,92％ and 89％,88％,88％ respectively.Control at 45 d based on fresh weight was 89％,88％ and 89％ respectively,being significantly better than other treatments.Additionally,these three treatments were selective and seedlings grew normally without any indication of phytotoxicity and yields increased by 24％,22％ and 20％,respectively,compared to the control treatment.