Hydrological Process and Nutrient Tendency on the regenerative Forest Ecosystem of Tropical Mountain Rain Forest in Jianfengling,China

Based on the technique of small catchment and the measurement of integrated experiment,the nutrient tendency with the hydrological processes of rainfall,throughfall,stemflow and total runoff for 3 years were studied and analyzed at the regenerative forest of tropical mountain rain forest in Jianfengling,China. The results showed:(1)85.4 percent of annual precipitation was distributed in rainy reason May to October,15.1 percent of rainfall was intercepted by the forest canopy in rainy reason,19.7 percent of rainfall was intercepted by that in dry reason. 50 percent of annual rainfall was washed away by the total runoff. The system had marked a lag-phase on the runoff with the rainfall processes. (2)There was a close relation between tendency changing of the nutrient storage and hydrological changing,Main storage of hydrochemical matter was at rainy reason. Except Ca,annual nutrients input of the internal rainfall of forest could be increased by 1.5～18.7 times more than that of the precipitation,and main input by both distributed in the rainy season. (3)Except Si,annual accumulation of the nutrients in the catchment amounted to about 78 percent of the nutrient input amounts by rainfall,particularly Org. C,K,Ca and N. The accumulative order of elements in the catchment as follow:Org. CKCaNMgMnPAlSi. Analysis results displayed that the system not only had significance hydrologic benefit but also had store function of hydrochemical matter.