祁连山东段哈溪林区不同海拔对青海云杉林下土壤有机碳含量的影响

摘要

Through field investigation and experiment,using multiple comparisons,correlation analysis and other methods,soil organic carbon content of Picea crassifolia in Haxi Forest Zone of Eastern segment of the Qilian Mountains was studied.Result shows that:in different altitudes,soil organic carbon content is different with the deepening of soil depth.The soil organic carbon content increased gradually with the deepening of soil depth at the altitude of 2 553.8 m and 2 786.4 m.But at the altitude of 3 01 6.8 m,the soil organic carbon content gradually de-crease with the deepening of soil depth,and changed relatively greatly.In general,the total soil organic carbon con-tent increased gradually with the increase of altitude,the change trend is obvious.%通过野外样地调查和试验,采用多重比较、相关分析等方法,研究了祁连山东段哈溪林区青海云杉土壤有机碳含量。结果表明：不同海拔高度上,土壤有机碳含量随土层厚度加深所呈现的变化趋势不一样,在海拔2553.8 m 和2786.4 m,土壤有机碳含量随土层厚度的加深而逐渐升高,而在海拔3016.8 m,土壤有机碳含量随土层厚度的加深而逐渐降低,且变化幅度较大。总体来说,土壤总有机碳含量随海拔的升高而逐渐升高,变化趋势明显。