文献类型： 会议论文

第一作者： X. Y. Ma

作者： X. Y. Ma ¹ ;

作者机构： 1.Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China

关键词： alopecurus japonicus;chlorsulfuron;hygrophilous grass;multiplied-dominance ratio;post-rice wheat

会议名称： The 18th Asian-Pacific Weed Science Society Conference v.1

主办单位：

页码： 278-282

摘要： The strata cover and multiplied dominance ratio methods have been employed in extensive survey of weediness and crop-weed community composition and have promoted monitor and survey of weed shifts in wheat. Investigations showed that in post ―rice wheat of Jiangsu, dominant and troublesome weed species are mostly hygrophilous grasses.eg. Alopecurus japonicus, Beckmannia syzigachne, Sclerochloa kengiana. Change from traditional cultivation to minimum and zero-tillage in post-rice wheat planting has favored and significantly increased infestation of hygrophilous grass species which prefer higher soil moisture. Minimun and zero-tillage combined with serial application of chlortoluron from middle to the end of 1980's resulted in shift of pre-dominant weed species from Alopecurus aequalis to A.japonicus. On basis of soil residual studies and weed shifts in 1990's, mixture formulations of low-dosage chlorsulfuron with isoproturon, chlortoluron or fenoxaprop-p-ethyl have been applied extensively in neutral or acidic soils of wheat-rice double cropping districts for effective control of A. japonicus, B. syzigachne, S. kengiana, Galium aparine and other broad-leaved weeds.

分类号： S3