一种除草剂对直播稻田杂草的防除效果及增产效应

Weed Control with a Kind of Herbicide in Direct Seeding Rice Fields

为明确24%五氟磺草胺·吡嘧磺隆·氰氟草酯油悬浮剂对直播稻田杂草的防治效果,2015~2016年在大田条件下研究了其对水稻直播田杂草的防治效果及对水稻产量的影响。试验结果表明:该药剂对稻田禾本科杂草稗草和千金子、阔叶杂草鸭舌草和节节菜以及莎草科杂草异型莎草均具有良好的防效,且对水稻安全。其适宜的施用剂量为144.0~180.0 g a.i./hm2,施药适期为水稻3~5叶,稗草3~4叶期或千金子2~3叶期。水稻增产幅度在148.1%~207.9%之间,与对照相比增产明显。

24% Penoxsulam ·pyrazosulfuron-ethyl ·cyhalofop-butyl OD is a new herbicede for weed control in Direct Seeding rice felds. Weed control effect and rice security of 24% penoxsulam pyrazosulfuron-ethyl cyhalofop-butyl OD was studied with the feld experiment in 2015-2016. The results showed that penoxsulam ·pyrazosulfuron-ethyl ·cyhalofop-butyl has good control for most of rice feld weeds such as Echinochloa crusgalli（L.） Beauv., Leptochloa chinensis（L.） Nees, Monochora vaginalis （Burm.f.） Presl ex Kunth）, Rotala indica（Willd.） koehne and Cyperus L., The herbicide has very good safety to direct seeding rice. The rate from 144.0 to 180.0 g a.i./hm^2 is the best suitable dosage. the suitable applying period is at 3-4 leaves stage of rice and 3-4 leaves stage of Echinochloa crus-galli or 3-4 leaves stage of Leptochloa chinensis（L.）. Compared with controlling, rice production increased from 148.1% to 207.9%.