北方半干旱地区草坪主要杂草生态学特征及其生长发育动态研究

环境条件的差异对草坪杂草种群的发生具有明显的动态影响:早开堇菜(Viola prionantha Bunge)大量生长在管理水平较差的草坪中；鼠掌老鹳草(Geranium sibiricum L.)、鹅绒委陵菜(Potentilla anserine L.)是管理水平较好(尤其是水分条件较优越)草坪的主要杂草种群;赖草(L. sacalinus (Georgi.) Tzvel)主要在管理水平一般的草坪中生长. 4种植物种群数量季节变化趋势均为“四蜂型”曲线，鹅绒委陵菜种群与早开堇菜种群变化十分相似，而鼠掌老鹳草种群数量季节变化与其主要竞争杂草——鹅绒委陵菜明显不同. 4种植物单株各器官生物量季节变化趋势均存在显著差异. 

The Study on the Ecological Characteristics and Growth of the Main Weeds in Lawns in Semi-Arid Region of the North of China

The difference of environmental conditions obviously affects the growth of weedsin lawns. Viola prionantha Bunge mainly grows in the badly managed lawns, and Geranium sibiricum L. and Potentilla anserine L. are the dominating weeds in the better managed lawns. L. sacalinus (Georgi.) Tzvel mostly appears in the average-managed lawns. The tendencies of the quantity of the four kinds of weeds present the curves with “four-peak”. The seasonal changes of population quality all take on four-peak curves. And the curves of Viola prionantha Bunge and Potentilla anserine L. are similar very much. But the curves of Geranium sibiricum L. and Potentilla anserine L. are quite different.The seasonal changes of organ-biomass of the four kinds of plants have great differences.