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生态学杂志 ›› 1997, Vol. ›› Issue (5): 14-18,37.

• 研究报告 • 上一篇    下一篇

桤柏混交林的氮素积累与生物循环

石培礼1, 杨修1, 钟章成2   

  1. 1. 中国科学院自然资源综合考察委员会, 北京100101;
    2. 西南师范大学生命科学系, 重庆630715
  • 收稿日期:1996-01-04 修回日期:1996-09-28 出版日期:1997-10-10
  • 基金资助:
    国家“八五”科技攻关专题“长江中上游防护林体系综合效益定位观测与计量研究”

The Accumulation and Biological Cycling of Nitrogen in the Alder and Cypress Mixed Forest

Shi Peili1, Yang Xiu1, Zhong Zhangcheng2   

  1. 1. Commission for Integrated Survey of Natural Resources, Academia Sinica, Beijin 100101;
    2. Department of Life Sciences, Southwest China Normal University, Chongqing, 630715
  • Received:1996-01-04 Revised:1996-09-28 Online:1997-10-10

关键词: 林火烈度, 归一化火烧指数(NBR), 环境因子, 过火面积, 遥感, 大兴安岭呼中林区

Abstract: The accumulation and biological cycling of nitrogen of the 16 year old alder and cypress mixed forest have been studid in Yanting county,Sichuan province.The results showed that the amount of nitrogen in the standing biomass of the community was 533.98 kg穐a-1 of which the amounts of aboveground and underground parts were 468.48 kg穐a-1 and 55.50kg穐a-1 respectivly.With regard to the biological cycling of nitrogen in the community,the value of annual uptake was 110.36kg穐a-1 of which its retention was 23.45kg穐a-1 and the return was 86.91 kg穐a-1 per year.The turnover period was 6 years.The nitrogen cycling of the community was charaterized by large uptaking much returning and rapid turnover.

Key words: forest fire severity, normalized burn ratio (NBR), environmental factor, burnt area, remote sensing, Huzhong forest region of Great Xing’an Mountains.