称多县清水河乡典型退化草地调查研究

Investigation of Typical Degeneration Grassland in Qingshui-river Country of Chengdu County

对玉树州称多县清水河乡典型退化草地不同退化梯度高寒草甸的群落结构持征、土壤养分和退化成因等进行了调查研究。结果表明,4种不同退化梯度的草地中,植物的物种多样性、土壤养分和含水量等均随退化程度的加剧而降低;原生植被和轻度退化草地是受害轻微的退化草地生态系统;重度退化草地和极度("黑土型")退化草地是受害程度极大的退化草地生态系统。

The cummunity structure character, the soil nutrient and the degeneration cause of for marion in the the different degeneration gradient of the high-cold meadow of the typical degeneration grassland were investigated in Qingshui-river Country of Chengclu county, Qinghai provincl. The results showed that the species diversity of plant, the soil nutrient and the water content in four kinds of different degeneration gradients of grassland decreased with the increase of the degeneration degree. The primary vegetation and the light degeneration grassland were a slight destroyed degeneration grassland ecological system. The serious degeneration grassland and the extreme degeneration grassland （ ＂black-soil-type＂ ） were the extreame destroyed degeneration grassland ecological system.