THE FOREST SOIL MOISTURE REGIMES OF WOLONG NATURAL RESERVE

Permanent sample plots were located under forests in the 30°45' ~31°25'N and 102°52'~103°24' E, between 1200~4300 m above sea level, in the Wolong Natural Reserve. There are five mountain forest soil types for the sample plots:(1) mountain yellow soils under the evergreen forest, (2) mountain brown forest soils under the deciduous and broadleaf forest, (3) mountain dark brown forest soils under the coniferous deciduous and broad-leaf mixed forest, (4) mountain brown dark coniferous forest soils under the pure fir forest, (5) alpine meadow soils of the alpine meadow zone.Observation began in 1981 and ended in 1984. It is found that the forest soil moisture storage capacities in the experimental forest field are: maximum water-holding capacities of forest floor 36~313 t/ha, water-storage capacity of forest soil 611~2334 t/ha, forest soil permeability coefficient 1.54-5.33 mm/min, the degree of forest soil moisture supply: mountain brown dark coniferous forest soils (heavy moist)alpine meadow soils (heavy moist) mountain brown forest soils (moist)mountain yellow soils (light moist) mountain dark brown forest soils (low-light moist).