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198 6～ 2 0 0 0年由科研、推广及管理 8家单位组成的浙江省农田杂草研究协作组在浙江省嘉兴、杭州、金华和温州 4个农区 ,对水稻田杂草发生种类和危害程度开展全面系统调查 ,涉及早稻、晚稻、单季稻、秧田等各种耕作稻制和直播、抛秧、旱育秧等不同轻型栽培方式。调查结果 ,浙江省水稻田共有杂草 4 1科 77属 131种和 2变种 ,其中主要杂草 2 1科 35属 4 1种和 1变种 ,如稗草、千金子、双穗雀稗、异型莎草、空心莲子草、鸭舌草、矮慈菇、节节菜、牛毛毡、丁香蓼等。杂草危害以单季稻田最重 ,晚稻田次之 ,早稻田最轻 ;早稻田杂草群落简单 ,以稗草占绝对优势 ,而晚稻田群落较为复杂 ,由稗草和阔叶草及莎草共同构成群落。一些杂草在局部地区造成严重危害。同时 ,直播田和抛秧田杂草危害重于常规移栽田 ,旱育秧田杂草种类多于常规水育秧田。长期使用除草剂 ,使常规栽培稻田一年生杂草发生减轻 ,而多年生杂草危害上升 ,但稗草仍为主要恶性杂草。最后 ,附有浙江省水稻田杂草名录
198 6 ~ 2000 Zhejiang Province Farmland Weed Research Collaborative Group consisting of 8 units of scientific research, promotion and management in four rural areas of Zhejiang Province, Jiaxing, Hangzhou, Jinhua and Wenzhou, To carry out a comprehensive and systematic investigation on the degree of damage, involving various early rice, late rice, single-cropping rice, seedling and other tillage rice and direct seeding, throwing seedlings, dry nursery seedlings and other light-weight cultivation methods. The results showed that there were 131 species and 2 varieties of 77 genera and 41 genera in paddy field of Zhejiang Province. The main weeds were 21 families, 35 genera and 41 species and 1 variety, such as barnyardgrass, cadmium, paspalum, Sedge, Alternanthera philoxeroides, Monochoria, Sagittaria mushrooms, section dishes, cattle blankets, clove Polygonum and so on. The weeds harms the heaviest in single-season paddy fields, the second-most in late-season paddy fields and the lightest in early-season paddy fields. The weedy community in early-season paddy fields is simple and dominated by barnyardgrass, while the late-season paddy fields are more complex. Both barnyard grass and broadleaf and sedge Community. Some weeds cause serious damage in some areas. At the same time, weeds harvested more often than conventional transplanting fields in field and throwing seedlings. Long-term use of herbicides, mitigation of annual weeds in conventional cultivated rice, perennial weeds hazards increased, but barnyardgrass is still the main weed. Finally, we have a list of paddy weeds in Zhejiang Province