云南高原盆地城市水源地土壤水源涵养能力研究

Water Conservation Capacity of Soil in Yunnan Plateau Water Source Basin Area

城市水源地土壤水源涵养能力大小关系到城市的供水安全，因此，对不同森林类型土壤的水源涵养能力进行研究对于保障城市水安全具有重要意义。采用实地采样调查法对云南省蒙自市菲白水库水源区4种植被类型区的土壤理化性质和贮水性能进行分析测试。结果表明，不同林分的土壤理化性质及其水源涵养能力差异明显。相同立地条件下0～80cm土层内贮水性能最优的为柏树次生林，总贮水量高达5946．9t／hm2^；4种林分的水源涵养能力从大到小依次为：柏树次生林（5946．9t／hm2^）〉桉树人工林（5725．85t／hm2^）〉桃树（5349．55t／hm2^）〉杉树人工林（4850．83t／hm2^）。

Urban water conservation in relation to the water security of the city. Therefore, the study on soil water conservation capacity of different forest types is of great significance for the urban water securi- ty. Choosing different vegetation types of Mengzi Feibai water reservoir areas , its physical and chemical properties and reservoir performance are measured, the results show the difference of soil and water con- servation in different stands are significant. Under the same site conditions 0 - 80era soil water storage , the optimal performance is cypress forest, the total storage capacity is up to 5946. 9 t/hm2, 4 species stands of water conservation function in descending order is followed as ： cypress secondary forest （5946. 9 t/hm2^） 〉 eucalyptus plantations （5725. 85 t/hm2^） 〉 peach （5349. 55 t/hm2^） 〉 cedar planta- tions （4850. 83 t/hm2^）.