Nutrient cycle in agriculturat erosystem of Shanyi ViIlage

Nitrogen,phosphorus and potassiun1 nutrientscycles in the subsystems of farmland,hilly area and waterbodyat Shanyi Village of Xiaoshan City in Zhejiang province werestudied. The resuIts indicated that the soil organic matter content in the village was relatively rich; the inorganic nitrogenfertilizer was overused with N loss;the totai input of P fertilizer was far lower that of total output,and the K input was alsoIow,The waterbedy has been eutrophicated and fish growthcoefficient was 2.96.