枫香杉木混交林的水文效应分析

Analysis on hydrological effects of mixed forest of Liquidambar formosana and Cunninghamia lanceolata

通过标准地调查和试验测定,对枫香杉木混交林和纯林的林分持水量、土壤渗透性能等水文效应进行比较分析,结果表明:不同类型林分持水能力存在明显差异,枫香杉木混交林林地上部持水量、土壤层持水量、林分总持水量均高于纯林,表现为:5枫5杉> 4枫6杉>枫香纯林>杉木纯林;各林分不同层次持水量排序:土壤层(0~60 cm)>林冠层枝叶>枯枝落叶层>林下植被层;各林分土壤层是水源涵养的最重要层次,其持水量均占林分总持水量的99%以上。

The hydrological effects of mixed forest and pure forest of Liquidambar formosana and Cunninghamia lanceolata,such as water holding capacity and soil permeability,were compared and analyzed by standard land investigation and experiment.The results showed that there were significant differences in water holding capacity among different types of stands.The above-ground water holding capacity,soil water holding capacity and total water holding capacity of mixed forest of L.formosana and C.lanceolata were higher than those of pure forest,which were as follows:5 L.formosana:5 C.lanceolata>4 L.formosana:6 C.lanceolata>L.formosana pure forests>C.lanceolata pure forests.The order of water holding capacity of different layers of each stand was as follows:soil layer(0~60 cm)>branches and leaves of canopy layer>litter layer>vegetation layer under the forest.The soil layer of each stand was the most important level of water conservation in the forest,its water holding capacity accounts for more than 99%of the total water holding capacity of the stand.