黑河上游冰沟流域不同林地土壤理化性质及有机碳和养分的剖面变化规律

Change of Soil Physical and Chemical Properties,Organic Carbon and Nutrients of Different Soil Profile on Different Forest in Binggou of Heihe Basin

在黑河上游的冰沟流域,采用野外采样和室内分析方法研究不同林地土壤理化性质及有机碳和养分的剖面变化规律。结果表明:不论是林地还是草地,土壤容重、物理性砂粒、pH值、CaCO3均随着土层的加深而增大;而孔隙度、团聚体、有机碳、全氮、全磷、CEC均随着土层的加深而降低。林地与草地土壤剖面的容重、物理性砂粒、pH值、CaCO3由小到大变化顺序为林地<草地;而总孔隙度、团聚体CEC、有机碳、全氮、全磷由大到小变化顺序为林地>草地。不同林地土壤剖面容重、物理性砂粒、pH值、CaCO3由小到大变化顺序为青海云杉<高山灌丛林<祁连圆柏林;而总孔隙度、团聚体CEC、有机碳、全氮、全磷由大到小变化顺序为青海云杉林>高山灌丛林>祁连圆柏林。

In the Binggou of Heihe basin, the change of soil physical and chemical properties, organic carbon and nutrients were investigated through field sample and laboratory analysis. The result showed that： Bulk density, content of physical sand grain, pH value, CaCOa increased with the deep of the profile. The consequence of these properties was forest 〈grassland. The consequence of those properties of different forest was Qinghai spruce 〈alpine scrub 〈Qilian juniper. Porosity, aggregate, organic carbon, total nitrogen, total phosphorus and CEC decreased with the layer. The consequence of these properties was forest 〉grassland. The consequence of properties of different forest was Qinghai spruce 〉alpine scrub 〉Qilian juniper.