摘要
贵州省农田发生杂草种类有８７科３０６属５８０种；其中农田主要杂草１５８种，重要杂草１６种，危害较重的杂草１７种，区域性主要杂草２３种，常见主要杂草１０２种；杂草群落因作物、海拔而变化；全省２级以上杂草危害面积１５４．２～２０９．９万ｈｍ２，占种植面积的４０．４％～６０．５％，产量损失率１１．７％，年粮食损失１．４５～２．５５亿ｋｇ，受害程度小麦＞玉米＞烤烟＞油菜＞水稻。
There are 580 weeds species in farmland in the province with 158 major species.According to the distrubution and its infestation level it could be divided into 4 categories:(1)most important16 species,(2)important-17 species,(3) common-102 species,(4) regional-23 species;The composition of the community vary with elevation and crop species;The weed infestation area reached 1.542～2.099 million ha,which is make up 40.4%～60.5% of total cropping area,and it may resulted in 11.7% of yield loss with the loss of 145～255 million kg of grains.The serious infestation order is wheat,maize,tobacco,rapeseed and rice.
出处
《植保技术与推广》
1996年第4期3-6,共4页
Plant Protection Technology and Extension
关键词
农田杂草
种类
群落
危害
产量损失
贵州
weed of farmland species society degree of damage production losses
