河北省农科院粮油作物所杂草研究课题组对谷田杂草生态与防除的研究历时5年,研究结果如下: 1.谷田杂草的种类:经研究确定,河北省夏谷田的杂草以马唐为主,伴生草是牛筋。个别地有稗草和狗尾草。还有少许马齿苋、铁苋、苋菜等。2.谷田杂草一马唐的生物学特性:经研究,马唐种子具休眠性,其种子休眠期 Hebei Academy of Agricultural Sciences Cereals and Oils Weed Research Task Force on the weeds in the valley of the ecology and control of lasted 5 years, the research findings are as follows: 1. The type of weeds in the valley: The study determined that summer weeds in Hebei Province to Cang-based, associated grass is tendon. There are barnyard grass and foxtail individually. There are a little purslane, iron amaranth, amaranth and so on. 2. Trail weed a crab biological characteristics: the study, Crabgrass seeds with dormancy, the seed dormancy