75%二氯吡啶酸对油菜田阔叶杂草的防除效果  

Effect of Clopyralid 75% SG on Broad-Leaf Weed and Yield of Rape

作　　者：张宏军[1] 郭嗣斌[2] 朱文达[3] 黎银忠 

机构地区：[1]农业部农药检定所,北京100125 [2]湖北省农业科学院粮食作物研究所,武汉430064 [3]湖北省农业科学院植保土肥研究所,武汉430064 [4]湖北省京山县农业局,京山431800

出　　处：《华中农业大学学报》2009年第1期27-30,共4页Journal of Huazhong Agricultural University

基　　金：国家"十五"科技攻关项目(2001BA509B07);湖北省重点科技研究项目(992P0504)资助

摘　　要：为明确75％二氯吡啶酸可溶性粒剂在油菜田的应用前景，采用田间试验、取样考种和仪器测定分析的方法，观察了其对油菜田主要阔叶杂草的控制作用和光照强度、肥水条件及油菜产量的影响。结果表明：75％二氯吡啶酸可溶性粒剂对油菜田主要阔叶杂草大巢菜和稻搓菜的防除效果较好，施药后40d的防效分别为93-100％和90％-100％，施药后60d的防效分别为94％-100％和91％-100％；对油菜田牛繁缕和禾本科杂草看麦娘、蔺草等防效较差。使用75％二氯吡啶酸可溶性粒剂后，随着用药量的增加，田间透光率逐渐上升；同时降低了杂草对田间氮、磷、钾和水分的吸收，改善了油菜生长的光照和肥水条件，显著提高了油菜产量。The weed control effects of clopyralid 75% soluble granules（SG） and subsequent dynamics in rape fields, as well as the effect of clopyralid 75% SG on the sunlight, fertilizer, water and crop yield were studied to evaluate the application prospect of clopyralid 75% SG. The results showed that clopyralid 75% SG provided apitimum control effects on Vicia sativa L. and Lapsana apogonocides in rape fields, the control effects ranged from 94% to 100G and from 91% to 100% sixty days after thetreatment（DAT） respectively. However,clopyralid 75% SG provided poor control effects on Alopecurus aequalis,Beckmannia erucaeformis Host. and Malachium aquaticum （L.） Fries. With the increase of the dosage of herbicide, the light penetration rate increased, and the content of total nitrogen, phosphorus,potassium and water of Vicia sativa L. reduced. Clopyralid 75% SG application significantly improved the light, fertilizer and water conditions in rape field, and increased the yield of rape significantaly.

关 键 词：二氯吡啶酸 大巢菜 稻搓菜 药效 产量 

分 类 号：S451.1[农业科学—植物保护] S565.4