吡嘧磺隆·五氟磺草胺防除水稻直播田杂草的效果

Effects of the Mixture of Pyrazosulfuron-ethyl and Penoxsulam on Controlling Weeds in Direct-seeded Rice Field

研究了4％吡嘧磺隆·五氟磺草胺油悬浮剂防除水稻直播田主要杂草的效果及对杂草氮、磷、钾及水分的影响。结果表明．施用4％吡嘧磺隆·五氟磺草胺油悬浮剂防除直播稻田杂草效果显著，对稗草[Echinochloa crusgalli（L．）Beauv]、异型莎草（Cyperus difformis L．）、鸭舌草[Monochoria caginalis（Burm．F．）]的防治效果达95．39％～100．00％，对旱莲草（Eclipta prostrata L．）的防治效果为85．42％-100．00％。4％吡嘧磺隆·五氟磺草胺油悬浮剂防除杂草，减少了杂草对田间养分水分的吸收，改善了田间的光照和水肥条件，增产效果显著。

The effects of 4% pyrazosulfuron-ethyl.Penoxsulam controlling weeds in the direct-seeded rice field and subsequent effects on absorption of N, P, K and moisture were studied. The results showed that 4% pyrazosulfuron-ethyl·Penoxsulam had good controlling on Echinochloa crusgalli （L.） Beauv., Cyperus difformis L. and Monochoria vaginalis （Burm.F.）, with the controlling effects ranged from 95.39% to 100.00%. The control effects on Herba Eeliptae Eclipta prostrala L. were 85.42- 100.00%. There was a negative correlation between the effects of controlling weeds and absorption of nutrition and moisture. The light penetration rate, water and nutrient conditions were significantly improved, resulting in yield increase.