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生态学杂志 ›› 1987, Vol. ›› Issue (5): 21-26.

• 研究报告 • 上一篇    下一篇

上海郊区农业投能量和投能效率研究

王方桃   

  1. 上海市农业科学院土壤肥料研究所
  • 收稿日期:1986-06-27 出版日期:1987-10-10

study on Energy Inputs in Agriculture and Their Efficiencies in Shanghai Outskirts

Wang Fangtao   

  1. Institute of Soil and Fertilizer, Shanghai Academy of Agricultural Sciences
  • Received:1986-06-27 Online:1987-10-10

关键词: 湿地生态系统, P、K分布特征, 季节动态, 三江平原

Abstract: The energy inputs,outputs and their structures in agriculture of Shanghai Outskirts werestudied.The results indicated when the chemical nitrogen fertilizers accounted for 72.4% in the total mineral energy inputs the efficiencies Of the energy inputs were reduced.There-fore,a proper decrease of the application of chemical nitrogen fertilizers was suggested.

Key words: Wetland ecosystem, Distribution characteristics of phosphorus and potassium, Seasonal dynamics, Sanjiang Plain