松花坝水源区不同林分土壤特性及其水源涵养功能

通过对松花坝水源区4种主要林分样地的土壤物理性质和贮水量进行测定，同时与裸地进行对比分析，结果表明：4种林分平均土壤的自然含水量比裸荒地高15％，土壤容重、孔隙度、有机质含量和土壤粒度都优于裸荒地；林分的水源涵养功能高于裸荒地，其中圣诞林水源涵养功能最好，华山松林次之，云南松林和滇石栎林稍差。说明培植林分对水源涵养有巨大作用，对水源区生态发展意义重大。

Soil Characteristics of Different Forest Stand and Water Conservation Function in Songhuaba Water Source

Soil physical properties and water conservation function at different forest stand in Songhuaba water source area were determined, as well as compared with the bare land. The results showed that aver- age soil natural moisture content of four forest stand were 15% higher than the bare land, and soil hulk density, porosity, organic matter content and soil particle size were optimal than bare land respectively; water conservation function of forest stand was higher than bare land, in which water conservation func- tion of Christmas tree was the best, China pine was the next, and Yunnan pine and Yunnan stone oak were the least. Forest protection and planting have a huge effect on water source conservation and are also significance for eco- development in water conservation area.