新疆拜城冬小麦地主要杂草类型与不同轮作方式杂草种类调查

摘要

Occurrence of weeds in winter wheat fields was determined by a diagonal five -point sampling in Baicheng re-gion of Xinjiang .There were 41 weed species from 16 families in winter wheat fields of this region ,with annual weeds and herbaceous perennials accounting for 61% and 39%,respectively.Dominant species were Echinochloa crusgalli,Setaira viridis,and Chenopodium glaucum at densities of 121,33 and 14 plants/m2 respectively.Winter wheat -silage corn and winter wheat -sweet clover rotations decreased the occurrence of winter wheat weeds ;winter wheat interplanting with sweet clover substantially decreased weed infestations (P<0.01).%采用对角线5点取样法调查新疆拜城地区冬小麦田杂草发生情况，结果表明：该地区冬小麦地有杂草16科41种，一年生杂草占60．98％，多年生杂草占39．02％，优势杂草为无芒稗、狗尾草、藜，其密度分别为120．7、32．6、14.1株/m2；冬小麦-青贮玉米、冬小麦-草木樨能够抑制冬小麦地杂草的发生，其中冬小麦套种草木樨抑制杂草效果极显著（P＜0．01）。