人工植被土壤水分状况与动态研究进展

Research Development on Dynamical Soil Water Condition in Artificial Plantation

20世纪80年代后,人工植被在干旱、半干旱、半湿润地区都出现了土壤干化现象,而集水造林对改善土壤水分亏缺具有良好的效果.人工植被的土壤水分动态研究主要集中在季节动态和垂直动态两方面,土壤水分的运动定量化研究取得了一定进展,目前,研究主要围绕饱和—非饱和条件下运动参数的确定.土壤干化评价指标、水分环境负荷量、特定条件下树种结构和密度设计等将是今后研究的主要方向.

The research development of soil water, water harvesting afforestation, soil water dynamics and the rules of soil water movement in artificial plantation is summarized. It is pointed out that soil drying up phenomenon has been common to artificial plantations in arid, semi-arid and semi-moist areas since 1980's, and water harvesting afforestation has been proven an efficient way to increase water content in the soil. The research on soil water dynamics of artificial plantation has been stressed on seasonal and vertical dynamics in the past, and some progress has been made in quantitative study on soil water movement. Current study is being focused on determination of parameters reflecting soil water movement under both saturated and unsaturated status. While the major research contents in the future will be oriented to frame evaluation indexes for soil dehydration, determine soil water capacity and design right plantation density and tree species structure under some special conditions.