晋西黄土区不同森林植被的林地水源涵养功能

林地(包括枯落物层和土壤层)是森林植被水源涵养功能的主体,在水土保持中具有举足轻重的作用。根据蔡家川流域林地枯落物和土壤的分析与测定,研究比较了晋西黄土区不同森林植被的林地水源涵养功能。结果表明,不同植被类型枯落物的最大有效拦蓄量的大小排序为:虎榛子林(2 85mm)>沙棘林(2 38mm)>刺槐林(1 88mm)>油松×刺槐林(1 31mm)>油松林(0 77mm)。不同植被类型0～60cm土层的林地土壤最大拦蓄量为:虎榛子林(248 2mm)>油松×刺槐林(241 0mm)>刺槐林(210 2mm)>油松林(198 1mm)。晋西黄土区不同森林植被的林地水源涵养功能研究,为该区水土保持林的合理经营与利用提供了科学依据。

Functions of Water Conservation of Different Forestlands in Loess Plateau in Western Shanxi Province

Forestland(litter layer and soil layer)is the principal part of forest to conserve water, and has important functions in water and soil conservation. Based on the analysis on litter and soil of different forestlands in Caijiachuan watershed, the paper discusses the functions of water resources conservation of various forestlands of the Loess Plateau in the western Shanxi Province. The results show that the size of the maximum capability of litter interception in different vegetation types is: Ostryopsis davidiana (2.85mm)>Hippophae rhamnoides(2.38mm)>Robinia pseudoacacia (1.88mm)>Pinus tabulaeformis×Robinia pseudoacacia (1.31mm)>Pinus tabulaeformis(0.77mm). The maximum water amount of interception in 0～60cm soil layer in different forestlands is: Ostryopsis davidiana(248.2mm)> Pinus tabulaeformis×Robinia pseudoacacia(241.0mm)> Robinia pseudoacacia(210.2mm)> Pinus tabulaeformis (198.1mm).The research on water conservation of different forestlands in the western Shanxi Province provides a scientific basis for wise management and utilization of water and soil conservation forests in the region.