宁夏南部半干旱黄土丘陵区不同整地方式下草地植物群落稳定性分析

Analysis on Stability of Steppe Plant Community under Different Site Preparation Methods in Semi-arid Loess Hilly Region of Southern Ningxia

主要以群落样方调查数据为基础,从植物群落结构、多样性以及稳定性测定方面,选择宁夏南部黄土丘陵区不同整地方式下的草地植物群落与自然恢复的天然草地群落进行对比研究,其结果表明:整地方式对草地植物群落结构、多样性和稳定性的影响不明显,鱼鳞坑整地植物群落相对稳定性较高,而天然封育草地的相对稳定性较低,主要是生境条件的不同影响了植物群落结构、多样性与稳定性.最终可知草地植物群落都处在一种相对不稳定的恢复阶段.

According to the structure, diversity and stability measuring of plant community, this paper compared the steppe plant community between different site preparation methods and natural resuming steppe in loess hilly area of southern Ningxia. The result showed that site preparation methods had a little effect on the structure of plant community, diversity and stability, and the relative stability of plant community in fish-scale pit site preparation was high, but the relative stability of natural closed steppe was low. Different habitat affected the structure of plant community, diversity and stability of plant community. Above all, the steppe plant community in this region was in a relatively unstable recovering stage.