三江源地区不同退化程度草地土壤微量元素含量研究

The Research on the Microelement′s Content in Soil of Different Deserted-Grassland of Source Area of Lantsang,Yellow and Yangtse River

通过对三江源地区不同退化程度草地土壤微量元素含量的研究表明,在不同土层中有效锌随土层的加深其含量逐层减少,有效铜、有效锰随土层的加深其含量逐层增高;在轻度和中度退化草地土壤中的有效锌和有效铜随退化程度的减轻其含量逐渐增高;玉树地区土壤中有效锌、铜、锰的含量都高于果洛地区。

The research on the miscroelement′s content of soil in different degree of degradation in source area of Lantsang,Yellow and Yangtse river was conducted. The result indicated that in different soil layer, with its depth increase, the content of available Zn reduce while the available Cu and available Mn′s increase, in light and middle degree of degradation on soil ,with the degree of degradation reduce, the content of available Zn and available Cu′s increase. Yushu area is higher than Cuoluo area in the content of available Zn,Cu and Mn.