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采用７级目测法，获得安徽省霍邱县夏收作物田６９个样点共８４．３ｈｍ￣２样地杂草种群的草害指数，对其进行数量分析——主成分分析（ＰＣＡ）和聚类分析，并赋以生态学意义的解释，结果显示该地区杂草的种类分布、危害程度与环境因子间的密切对应关系，杂草群落的分布主要取决于：（１）土壤湿度、结构性质；（２）土壤酸碱性。前者可通过样点的耕作制度，后者可通过样点的地理位置定性了解。数量分析的结果将全部样方分成３组——水稻土组、旱地组和偏碱土壤组，每组都对应着相应的杂草优势种。其中看麦娘、日本看麦娘、雀舌草为水稻土组的杂草优势种，猪殃殃、大巢菜、野燕麦为旱地组杂草优势种，偏碱土壤组优势种杂草为粘毛卷耳和牛繁缕。根据这些杂草群落的分布规律，提出了相应的杂草防除策略。
The grazing index of weed population of 69.3 hm ~ 2 in 69 sample plots of summer harvest crop in Huoqiu County of Anhui Province was obtained by using the 7-level visual inspection method. Quantitative analysis of PCA and poly The results show that there is a close correspondence between the distribution of weeds and the degree of damage and the environmental factors in the area. The distribution of weed communities mainly depends on: (1) the soil moisture, the structure and quality ; (2) soil pH. The former can pass the sample farming system, the latter can be qualitatively understood by the geographical location of the sample. The results of quantitative analysis divided all quadrats into three groups - paddy soil group, dryland group and partial alkali soil group, each corresponding to the corresponding weed dominant species. Among them, Anemarrhena asperata, Anemarrhena asiatica, the dominant species of weeds in the paddy soil group, the Galium aparinensis, the broadleaved weed and the wild oats were the weed dominant species in the dry land group, and the dominant weed species in the slightly alkaline soil group were Sticky hair ears and cattle chickweed. According to the distribution rules of these weed communities, we put forward the corresponding weed control strategies.