2007•Journal of Gansu Forestry Science and TechnologyRequires access
Hydrological and Ecological Effects of Forest Soil in Qilian Mountain
Luo Long-fa
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Abstract
Multi-generation succession was coexisted in water conservation forest of Qilian mountain because of influences of water and hot in forest site and disturbances of nature and history.The distribution of water conservation forest accounted for three vertical climate belts in Qilian mountain and mainly consisted 4 types of wet shrub forest,Picea crassifolia forest,Juniperus przewalskii forest and dry shrub forest,6 forest stands of wet shrub forest,moss-Picea forest,shrub-P.crassifolia forest,grass-P.crassifolia forest,Juniperus przewalskii forest and dry shrub forest.The investigation results indicated that the present quantity and component of litter-fall,water holding rate and holding content of soil were all different in various types of forest.The main physical property in mineral layer in forest soil was different in various forest stands and showed some regular variation with the depth of soil.The water holding content of forest soil was mainly influenced by soil porosity.The water holding content of forest soil was higher than that of non-forest soil,and the water content of both Picea crassifolia forest and shrub forest was higher than that of Juniperus przewalskii : forest among all types of forest stands in Qilian mountainous area