50％四唑草胺·苄嘧磺隆WP防除水稻直播田杂草的效果

通过田间试验研究50％四唑草胺·苄嘧磺隆WP对直播稻田杂草的控制效果和对水稻产量的影响,为直播稻田草害的化学防控提供依据.试验结果表明,每公顷使用50％四唑草胺·苄嘧磺隆WP有效成分112.5～187.5 g对直播稻田的稗草Echinochloa crusgalli (L.) Beauv]、鸭舌草Monochoria vaginalis (Burm.F.)]等均具有良好的防治效果,综合鲜重防效达到90％以上,优于对照药剂50％拜田净WP和10％苄嘧磺隆WP.施用50％四唑草胺·苄嘧磺隆WP能有效降低杂草对田间氮、磷、钾和水分的吸收,改善田间光照和水肥条件,水稻增产效果明显.

Effects of Weed Control in Direct-Seeded Rice Field Treated with the Compound of 50% Bensulfuron-Methyl and Fentrazamide

To provide guidance for chemical weed management in direct-seeded rice fields,trials were conducted to evaluate the effects on weed control and crop yield of the compound mixed with 50% bensulfuron-methyl and fentrazamide.The results showed that 50% wettable powder mixed with bensulfuron-methyl and fentrazamide at the dose of 112.5～187.5 g/hm2 had good control on Echinochloa crusgalli(L.) Beauv,Monochoria vaginalis(Burm.F.).The overall fresh control effects were over 90% which were better than that of 50% fentrazamide WP and 10% bensulfuron-methyl WP.The application of 50% wettable powder mixed with bensulfuron-methyl and fentrazamide significantly reduced the weeds absorption of nutrition and water,and improved the light and moisture of the field which resulting in prominent yield enhancing.