近年来,饲料作物种植在京郊迅速发展,其中小黑麦是本市新发展的一种饲料作物,同时,为了抑制农田扬尘,小黑麦免耕播种技术正在进行试验、推广。由于免耕播种田杂草发生早、密度大,越年生和春生杂草混合发生,严重影响了小黑麦生物产量。为此,2003年我们进行了免耕播种小黑麦田除 In recent years, the cultivation of forage crops has rapidly developed in the suburbs of Beijing. Triticale is one of the newly developed fodder crops in the municipality. At the same time, triticale no-till sowing technology is being tested and popularized in order to restrain farmland dust. Because no-till sowing weeds occur early, density, perennial and spring mixed weeds, seriously affected the triticale biomass. To this end, in 2003 we conducted no-till sowing of small black wheat fields