内蒙古冷蒿小禾草放牧草原退化与恢复对策研究

Inner Mongolia Artemisia frigida degraded rangeland and restoration strategies

对不同围栏年限放牧草原的研究结果表明,冷蒿重要性随着围栏时间的增加呈先增后降的趋势;地上部总干物重、植被总覆盖度、植物平均高度与围栏时间呈负相关变化。在全年性放牧草地中,以上指标均低于围栏放牧草地。植物多样性指数与均匀性指数与围栏时间呈正相关关系。由此提出了遵循生态学原理恢复退化草地的几种措施。

A study was conducted within rangeland fenced for different numbers of years on Inner Mongolia steppe land. The results showed that with fenced time increasing, the importance value of Artemisia frigida increased, then decreased. Changes in total aboveground dry matter, overall vegetation coverage, and average plant height all showed negative correlations with fenced time. For year round unfenced grazing land, the indexes named above were all lower than for fenced grazing land. Plant diversity and evenness indices showed positive correlations with fenced time. It is therefore suggested that measures in line with ecological principles for the restoration of degraded grassland be adhered to.