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