【摘要】 为明确新型吡啶类和环己烯酮类除草剂复配制剂对油菜田杂草的防控效果,指导新型除草剂在油菜田的合理使用,通过田间试验研究了20%氨氯吡啶酸·二氯吡啶酸·烯草酮可分散油悬浮剂对油菜田主要杂草的防除效果,以及杂草防除后对田间光照和杂草氮、磷、钾及水分累积的影响。试验结果表明,施用20%氨氯吡啶酸·二氯吡啶酸·烯草酮可分散油悬浮剂防除油菜田杂草效果显著,对菵草、大巢菜、看麦娘、牛繁缕等单双子叶杂草均有良好防效,总草鲜重防效可达88. 7%～98. 0%,显著优于两种对照药剂。杂草防除后,显著降低了杂草对田间氮、磷、钾和水分的消耗,有效地改善了田间光照和水肥条件。20%氨氯吡啶酸·二氯吡啶酸·烯草酮可分散油悬浮剂处理的油菜产量达到2 626. 26～2 836. 26kg/hm~2,增产效果显著,产量较空白对照增加18. 2%～27. 9%,增收2 173. 5～3 307. 5元/hm~2。研究结果表明,20%氨氯吡啶酸·二氯吡啶酸·烯草酮可分散油悬浮剂在油菜田有良好的应用前景,推荐剂量为每公顷使用有效成分225～300g。更多还原

【Abstract】 To evaluate the efficiency of 20% picloram·clopyralid·clethodim OD,a novel pyridine and cyclohexenone herbicide,and to provide guidance for rational use in rapeseed field,its weed control effect,rapeseed yield,light intensity,the content of N-P-K and water were analyzed after weed control by picloram·clopyralid·clethodim. The experiment results indicated that the offect of weed control was remarkable by 20% picloram·clopyralid· clethodim OD. Beckmannia syzigachne,Vicia sativa,Alopecurus aequalis and Malachium aquaticum were all effectively controlled with reduction of total grass fresh weight ranged from 88. 7 to 98. 0%,which greatly improved the light intensity,water and fertilizer effectivity for rapeseed in field,and contributed to increase of rapeseed yield of 18. 2-27. 9%,income increase of 1 086. 8-1 653. 8 Yuan/hm~2 compared to untreated control. It concluded that 20% picloram·clopyralid·clethodim OD was a promising herbicide in rape field,and the recommended dose is 225-300 g/hm~2.更多还原