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生态学杂志 ›› 1986, Vol. ›› Issue (3): 37-40,56.

• 研究报告 • 上一篇    下一篇

定西地区旱农生态系统的问题及其改善途径

蔺海明   

  1. 甘肃农业大学
  • 收稿日期:1984-09-28 出版日期:1986-06-10

Dryland-Ecosystem and Its Improvement in Dingxi District of Gansu

Lin Haiming   

  1. Gansu Agricultural University
  • Received:1984-09-28 Online:1986-06-10

关键词: 长效碳酸氢铵, DCD, 硝化和反硝化, NO和N2O排放

Abstract: This paper discusses several problems existed in dryland-ecosystem of Din gxi district and their occurence.It's considered that the main problems are lower and unstable crop yields,serious water-and soil erosion and deficiency of fertilizer,forage and fuel.Their occurence is due to the unreasonable structure of agriculture,low utilization rate of natural resources and unbalance of material and energy flow in this ecosystem.Some corresponding countermeasures are put forward by the author.

Key words: Modified ammonium bicarbonate, DCD, Nitrification and denitrification, NO and N2O emission