贵阳地区稻田主要杂草的发生及化学防除研究  

STUDY ON OCCURENCE OF MAJOR WEEDS AND THEIR CHEMICAL CONTROL IN PADDY FIELD IN GUIYANG AREA

作　　者：何占祥[1] 李照荣[1] 奏立新 李大庆 

机构地区：[1]贵州省农业科学院植保所,贵阳550006 [2]余庆县农业局植保站,564400

出　　处：《贵州农业科学》1990年第6期31-36,共6页Guizhou Agricultural Sciences

摘　　要：贵阳地区稻田主要杂草有22科48种,其中优势种以鸭舌草、眼子菜、泽泻为主,其次是野荸荠、牛毛毡和稗草。不同类型田(高榜田、坝子田、泡冬田)杂草群落组成和发生时期也有所不同。杂草的发生一般于插秧后20～25天和40～45天先后出现两个高峰期。当眼子菜和野荸荠鲜茎密度达10个/m^2,水稻分别减产26％和22％。5.3％丁西颗粒剂和20％丁草净乳油对稻田多种杂草的防除效果在85～90％。There are 48 species of major weeds belonging to 22 families in paddy field in Guiyang area. The superior species are Bog pond-weed (Potameogeton distinctus), Ducktongue weed (monochoria vaginalis), oriental waterplantain (Alismc plantagoquatica) etc. The .next are needle spikesedge (Eleocharis acicalaris), barnyardgrass (Echinochlola crusgalli) and spikesedge (Ecleochris tuberosa). The population and occurence period of weeds are different in various kind of field (terrace field, basin field, soaked field). As usually 20-25 and 40-45 days respectively after transplanting of rice. In general,the rice yield get reduced by 26% and 20% respectivelywhen the bulb density of bog pondweed and spikesedge reched 10/m. The efficiency could recah up to 85-90% in controlling many kinds of annual weeds by spraying 5.3% butachor-simetryme DF and 20% butachlor-prometryne Emul.

关 键 词：稻田 杂草种类 发生 化学防除 

分 类 号：S511.105.3[农业科学—作物学]