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生态学杂志 ›› 1993, Vol. ›› Issue (5): 29-35.

• 研究报告 • 上一篇    下一篇

壁山县农田生态系统中氮肥利用与平衡的研究

何新华   

  1. 云南师范大学生物系, 昆明650092
  • 收稿日期:1992-04-25 修回日期:1992-08-15 出版日期:1993-10-10

N Balance in Agroecosystem of Bishan County after Applying Nitrogenous Fertilizers

He Xinhua   

  1. Department of Biology Yunnan Normal University, Kunming, 650092
  • Received:1992-04-25 Revised:1992-08-15 Online:1993-10-10

关键词: 土壤侵蚀, USLE/RUSLE模型, 植被覆盖管理因子, 遥感

Abstract: The input and output of nitrogen and grain yield during 1949-1980 in Bishan County are analysed. Theresults show that nitrogen consumption is higher than its accumulation(-31.6%,+14.0%)and the ra-tio of organic-Nto chemlcal-N is obviously in disorder (2.00:0.67).It is suggested that nitrogen bal-ance can be maintained through planting green manure crops and properly applying manure and chemicalfertilizers.Raising the utilization rate of N fertilizer and the econornic effect of manure can increase thegrain yield and income in agricultural production.

Key words: soil erosion, USLE/RUSLE model, vegetation cover and management factor, remote sensing.