Advances on Researches of Nutrient Cycling in Forest Ecosystem

At present, nutrient cycling is one of the important research fields in forest ecosystem, and has been widely and deeply studied based on researches on the cycle of substance flow, balance of energy flow, cycle of water flow, and physiological and ecological processes in the forest ecosystem. With the introduction of the computer techniques and the loculose methods of system analysis, the study in nutrient cycling of forest ecosystem had changed from static to dynamic process, which promoted its progress. The research methods, results and trend of nutrient cycling of forest ecosystem are reviewed from ecological, physiological, and eco-physiological aspects in this paper.