高梁(Sorghum bicolor(L.)Moench)是印度中部半干旱地区的一种重要粮食作物。该作物在夏季雨季来临时开始种植,在降雨量充沛的年份,杂草生长繁茂,估计因杂草造成高梁减产25—29％。在其它国家,因未及时除草而造成减产的幅度在8—14％。目前几乎没有关于行内杂草生长的竞争作用及适宜的除草时间等方面的资料,也缺乏有关人工除草、出苗前和出苗后施用除草 Sorghum bicolor (L.) Moench is an important food crop in semi-arid areas of central India. The crop is planted when the summer monsoon season comes and weeds flourish in heavily rainfall-prone years. We estimate a 25-29% cut in sorghum yield due to weeds. In other countries, the rate of decrease in production due to the lack of timely weeding is between 8-14%. At present, there is almost no information on the competition effect of weed growth in the line and the suitable weeding time, and there is also a lack of information on the effects of artificial weeding, pre-emergence and post-emergence application of weeds