A Study on Water Storage Capacity and Water Availability in Soil of Different Types of Sites in Jiulongshan, Beijing

The results from the studies on water storage capacity and water availabilityin soil of different types of sites in Jiulongshan showed that soil available water content were 149.63、133.49、102.49、99.93、95.92 and 70.78 mm respectively for man-made Pinus tabulaeformis woodland in middle-lower schattenseite, shrubland and bare soil in middle-upperschattenseite, man-made Platycladus orientalis woodland in middle-lower endroit and shrub-land and bare soil in middle-upper endroit;soil saturation water content ranges from 1605.86t/hm2 to 2353.66t/hm2. Only is soil water content readily available water during the periodof July～August,in other time, it is irreadily available water. Even in rainy season,soil available water content is below field moisture retention. Soil water content is near to (or below)wilting water storage capacity of soil during spring drought season.