岷江杂谷脑河9种典型植被群落的水源涵养能力与价值评估
A Study of Water Conservation Capacity and Value Evaluation of 9 Kinds of Typical Vegetation Community in the Zagunao River of the Minjiang River
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摘要: 凋落物和土壤非毛管孔隙持水能力是计算植被群落水源涵养功能的重要组分。本文以理县杂谷脑河流域熊耳村的岷江柏人工林、刺槐人工林、油松人工林、黄栌次生林、杨柳阔叶林、云冷杉林、高山栎林、蔷薇灌草丛和沙棘灌丛为研究对象,分析了上述9种植被群落枯落物和土壤0~40 cm的非毛管孔隙持水量。结果表明,单位面积的枯落物现存量最大的是云冷杉林(34.53 t·hm-2),最小的是岷江柏人工幼龄林(1.37 t·hm-2),9种植被群落枯落物总持水量约27 099 t;单位面积的土壤非毛管孔隙持水总量最大的是高山栎林(905.3 t·hm-2),而持水量最小的是蔷薇灌草丛(227.9 t·hm-2),9种植被群落土壤非毛管孔隙持水总量约为331 751 t;熊耳村686.8 hm2植被群落枯落物和土壤非毛管持水总量约358 850 t,水源涵养价值约219.3万元。Abstract: Litter and soil water-holding capacity is one of the important components of computing function of water conservation vegetation community.In this paper,Cupressus chengiana forest,Robinia pseudoacacia forest,Pinus tabulaeformis forest,Cotinus coggygria forest,Populous and Salix forest,Picea and Abies forest,Quercus aquifolioides forest,Rosa brush and Hippophae rhamnoides brush were taken as the research objects,the litter and soil water-holding capacity in 0~40 cm were evaluated and calculated.The results showed that the total litter water-holding capacity of 9 plant communities was about 27 099 t.The total soil water-holding capacity in 0~40 cm of 9 plant communities was about 331 751 t.Based on the 686.8 hm2 plant communities in Xionger village,the total water-holding capacity of litter and soil in 0~40 cm was about 358 850 t,and the total water conservation value was about 2.193 million Yuan.
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