稻茬免耕移栽油菜田杂草的防除技术研究

Weed Control Technique of Rice Fields for Non-tillage Transplanting Rape

为了有效控制稻茬免耕移栽油菜田杂草的发生和危害,采用小区试验与大区试验示范相结合的方法,研究了50%乙草胺乳油100mL+200g/L百草枯水剂150mL/667m2、50%乙草胺乳油100mL+41%草甘膦异丙胺盐水剂150mL/667m2、200g/L百草枯水剂150mL/667m2、41%草甘膦异丙胺盐水剂150mL/667m2等不同药剂的杂草防除效果。结果表明:小区试验,药后60d,以上不同药剂处理对棒头草、碎米荠菜、毛茛、稻搓草等杂草鲜重防效均在90%以上;大区试验示范,在免耕油菜移栽3d前,用20%百草枯水剂150mL/667m2+50%乙草胺乳油100mL/667m2对免耕移栽油菜田杂草进行处理,以及在油菜生长阶段,根据田间杂草的草相组成,选择喷施50%草除灵悬浮剂或10.8%高效氟吡甲禾灵乳油防除,防效均在80%以上。采用以上技术措施能有效控制免耕油菜田杂草对油菜的危害,油菜生长安全。

Different herbicides and herbicide combinations were tested to study the weed control effect in rice field for non-tillage transplanting rape by the plot and big area experiments.The results showed that 100 mL/667m2 of 50% acetochlor ＋150 mL/667m2 of 200 g/L paraquat,100 mL/667m2 of 50% acetochlor ＋150 mL/667m2 of 41% glyphosateisopylammonium,150 mL/667m2 of 200 g/L paraquat and 150 mL/667m2 of 41% glyphosateisopylammonium all had over 90% control effect on fresh weight of Polypogon fugax,Capsella bursa-pastoris,Ranuncilus acris and Lapsana apogonoides at 60 d after spraying in the plot test.The control effect of spraying 100 mL/667m2 of 50% acetochlor ＋150 mL/667m2 of 200 g/L paraquat at 3 d before non-tillage rape transplanting and spraying 50% benazolin or 10.8% haloxyfob at growth period of transplanting rape on weeds in rice field was over 80% in the big area test.