摘要： 通过2003年7-8月对大兴安岭生态定位站落叶松林内0~30cm土壤容重、根系的测定及土壤质量含水量的动态监测得出如下结论：10~20cm土层和20~30cm土层土壤容重的平均值分别为0.338g/cm³、1.352g/cm³，随深度的增大土壤容重增大；67.9%的根系分布在10~20cm的土层中，32.1%的根系分布在20~30cm的土层中，随深度的增大根系分布减少；从垂直分布看，降雨过后，表层0~10cm土壤质量含水量首先出现最大值且损耗最快；其次为10~20cm，20~30cm土壤质量含水量最大值出现在降雨后的第四天；降雨第四天后三层土壤质量含水量比较接近；从水平分布看，随坡度下降土壤质量含水量增大，即坡底样地土壤质量含水量要高于坡顶样地。

关键词: 大兴安岭落叶松林, 土壤水分

Abstract: Through measuration of soil quantity and bedrock and dynamic measuration of soil water arrange in 0~30cm in the shed leaves pine the wood in Ecosystem Position of Daxinganlin in 7-8,2003,the results are as follow:the average of soil bulk density on preface is 0.338g/cm³、1.352g/cm³ in 10、20cm and 20、30cm,then it would increase with depth arden;67.9 percent of bedrock distributes in soil depth of 10~20cm,the 32.1 percent in 20~30cm and distribution of bedrock is lessen with depth arden.In term of vertical distribution of mass water content of soil in 0~10cm will appear max value but its consume is most quick after rained.The most of mass water content of soil is second in 10~20cm,20~30cm appears at fouth day when the mass water content of soil of three floors is similar.In term of level distributing of mass water content of soil,the mass water content of soil is lessen with gradient deceased,that is,the mass water content of soil of ramp bottom is higher than its top's.

Key words: The shed leaves pine the wood in the Da xing an ling, Soil water

中图分类号: 

• S565.5

• S143.7