麦田杂草不仅消耗土壤中的水分、养分,浪费光热资源,而且影响小麦产量。它们既是一个复杂的群体,又是形态特征各异的个体。其对小麦产量的影响因密度、种类、种群结构而异。所以,开展杂草对小麦影响的研究,是提高麦田化学除草技术的重要组成部分。为此,笔者于2001～2003年结合 Wheat weeds not only consume soil moisture, nutrients, waste light and heat resources, but also affect wheat yield. They are both a complex group of individuals with different morphological characteristics. The impact on wheat yield due to density, species, population structure vary. Therefore, the study on the impact of weeds on wheat is an important part of improving the technology of weeding on wheat fields. To this end, the author in 2001 ~ 2003 combined