苯噻酰·吡嘧防除稻田杂草对田间光照和水稻产量的影响  

Influence of Weed Control by Mefenacet+Pyrazosulfuron on Light and Rice Yield in Paddy Fields

作　　者：朱文达[1] 张宏军[2] 何燕红[3] 李林[1] 

机构地区：[1]湖北省农业科学院植保土肥研究所,武汉430064 [2]农业部农药鉴定所,北京100026 [3]华中农业大学园艺林学学院,武汉430070

出　　处：《湖北农业科学》2012年第5期919-921,共3页Hubei Agricultural Sciences

基　　金：国家科技支撑计划项目(2006BAD08A09)

摘　　要：采用田间试验和仪器测定分析方法研究了40.3%苯噻酰.吡嘧泡腾颗粒剂对水稻田间主要杂草的防除效果、杂草防除后田间不同高度层的透光率变化以及水稻产量的变化。结果表明,施用40.3%苯噻酰.吡嘧泡腾颗粒剂能有效控制水稻田间杂草,对稗草、异型莎草、鸭舌草的综合密度防效为91.56%～99.80%,综合鲜重防效为93.02%～99.82%;施用40.3%苯噻酰.吡嘧泡腾颗粒剂后,水稻田间的透光率显著提高,有效改善了田间光照条件,增产效果显著。40.3%苯噻酰.吡嘧泡腾颗粒剂防除稻田杂草的推荐剂量为241.8～483.6 g/hm2。The effect of 40.3% mefenacet＋pyrazosulfuron EA on the main weed control and the afterward light penetration rate （LPR） at different heights of fields, as well as the yields of paddy were studied by means of field experiments and instru- ment mensuration. The results showed that 40.3% mefenacet＋pyrazosulfuron EA had significant weed control effects. The over- all control effects of Echinochloa crusgalli, Cyperus difformis, and Monochoria vaginalis were 91.56%~99.80%; and the over- all quantity control effects were 93.02%-99.82%. The LPR of the paddy fields was significantly improved after weed control. With the weed control, the situation of light penetration rate was markedly improved, which resulted in prominent enhance- ment of rice yield. The recommended dose of 40.3% mefenacet＋pyrazosulfuron EA for controlling weeds in paddy field was 241.8-483.6 g/hm^2.

关 键 词：苯噻酰·吡嘧 水稻 杂草防除 透光率 产量 

分 类 号：S451.21[农业科学—植物保护]