三江源地区不同退化程度草地群落结构特征的变化

Analysis on Plant Community Structure in Different Degradation Grassland in the Sanjiangyuan Region

对三江源区玛多县鄂邻湖畔北岸不同退化程度的高寒草原紫花针茅草地和称多县珍秦乡不同退化程度的高寒草甸小嵩草草地植物群落结构及土壤养分进行了测定。结果表明,草地群落结构的各项指标随着草地退化程度的增加而降低;土壤中有机质含量随着退化程度的增加呈下降趋势。讨论了不同退化草地的恢复治理措施。

The plant community structure and grassland soil nutrition in Stipa purpurea type and Kobresia pygmaia type in different degradation of three-river source were determined. The results indicated that tvarious indicators of grassland community structure decreased as the increase of degeneration degree. The soil organic contents presented to reduce as increasing of grassland degradation. In this paper, the restoration and government measures in different grassland degradation were discussed.