四湖地区涝渍地油菜田杂草消长规律的研究

The Pattern of Growing and Declining of Weeds in Rape Fields in Waterlogged Land of Four lake Region

运用倒置“W”9点取样法对湖北省四湖地区涝渍地油菜田杂草发生情况进行了调查 ,比较了各种杂草在油菜各生长阶段的相对多度和单位面积鲜重 ,结果表明该地区油菜田主要杂草有 1 3科 2 5种 ,棒头草、看麦娘、繁缕和稻槎菜为最优势种群 ,水芹和艾蒿的发生在油菜生长后期逐渐增强。

A rape field weed survey was conducted using an inverted W pattern with 9 sampling points in waterlogged land of Four lake Region of Hubei Province in every growth period of rape.The results showed there were totally 25 species of weeds,belonging to 13 families.Based on the analysis of their relative abundance and fresh weight,Polypogon fugax,Alopecurus aequalis,Stellaria media and Lapsana apogonoideswere found to be the most abundant weeds in the area whereas Oenanthe javania and Artemisia vulgaris became important weeds gradually in later periods.