摘要
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(0～40cm)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、20～40cm土层内,土壤有机质含量分别为(13.52±2.46)%、(11.12±1.43)%、(9.17±1.29)%;变异系数分别为18.23%、12.83%、14.10%.土壤有机质含量随土壤深度的增加逐渐降低,随海拔升高逐渐增加.土壤质量密度在土壤垂直剖面上自上而下具有明显的增大趋势,在海拔梯度上表现为波动下降趋势,且与土壤有机质变化呈显著负相关.土壤水分在0～40cm土层内随着深度的增加逐渐降低,在海拔梯度上表现为波动变化,无明显的上升或下降趋势.
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.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2011年第6期86-92,98,共8页
Journal of Gansu Agricultural University
基金
国家自然科学基金重点项目(30230290)
国家林业局项目(200109)
关键词
祁连山
青海云杉
土壤空间变异性
Qilian Mountains
Picea crassifolia
soil spatial variability
