祁连山青海云杉分布带土壤的空间变异性研究

为了揭示土壤特性的空间变化规律,对祁连山青海云杉分布带不同土壤剖面(0～40 cm)及不同海拔梯度上(2 500～3 100m)的土壤温度、有机质、质量密度、水分等特征进行了分析.结果表明:研究区土壤温度随剖面深度的增加和海拔梯度的上升,表现出明显的降低趋势.在0～10、10～20、20～40 cm土层内,土壤有机质含...

Study on soil spatial variability of Picea crassifolia zonation in Qilian Mountains

The temperature,organic matter,bulk weight and water content of different soil profile(0~40 cm) and different altitudinal gradients(2 500~3 100 m) in Picea crassifolia zonation were researched in Qilian Mountains.The results showed that soil temperature significantly decreased with the increasing of profile depth and the increaing of altitude gradients.In 0~10,10~20,20~40 cm soil layers,the contents of soil organic matter were(13.52±2.46)%,(11.12±1.43)% and(9.17±1.29)% respectively,while the variation coefficient were 18.2%,12.83% and 14.10% respectively.The content of soil organic matter decreased with the increasing of soil depth,but increased with the increasing of altitude.Soil bulk weight had an obviously increasing trend with soil vertical section and decreased gradually with the increasing of altitude.Soil water reduced gradually with soil depth increasing in 0~40 cm soil layer,and it showed a fluctuation change with altitude gradients changing.