放牧和封育条件下金露梅灌丛草地群落动态变化的研究

对放牧和封育条件下金露梅灌丛群落动态变化进行了研究.结果表明：金露梅灌丛群落种类数量在放牧条件下不会发生明显的改变（P＞0.05）,在封育条件下出现轻微的先增后减的变化格局;盖度和地上生物量在放牧条件下6-7月无明显的差异,到9月上旬呈现下降趋势,显著地低于前期（P＜0.05）;在封育条件下7月下旬后趋于稳定状态,且明显地高于6月底的数值（P＜0.05）.群落的平均高度在放牧条件下无明显变化（P＜0.05）,在封育条件下呈现逐步增高的趋势,不同时期有明显的差异（P＜0.05）.

Study on the plant community dynamic change of Potentilla fruticosa shrubs under grazing and enclosure

The plant community dynamic change of Potentilla fruticosa shrubs under grazing and enclosure were studied. The results showed that the species number didn't change significantly with seasonal change under grazing (P>0.05). It presented a pattern of slight-increase first and slight-decrease later under enclosure. Both coverage and aboveground biomass didn't change significantly during late June and July and they showed a significant decreasing trend in early September under grazing (P<0.05). However, they were significantly higher than those of June's and tended to be stable after late July under enclosure. There were no significant differences for average height of the community along with time going under grazing (P>0.05) . It showed a increasing trend and had significant differences at different stages (P<0.05).