【摘要】 本文研究了浙江省萧山市山一村农业生态系统中农田、山地和水域３个子系统的氮、磷、钾养分循环。结果表明：该村土壤有机质含量属较高水平，无机氮肥施用量偏大，流失量也较大，磷的总投入量远低于总输出量，钾的输入量也偏低；水体属富营养型，鱼的生长系数仅２．９６。更多还原

【Abstract】 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 con-tent in the village was relatively rich; the inorganic nitrogenfertilizer was overused with N loss;the totai input of P fertiliz-er was far lower that of total output,and the K input was alsoIow,The waterbedy has been eutrophicated and fish growthcoefficient was 2.96.更多还原