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应用生态学报 ›› 1996, Vol. 7 ›› Issue (1): 19-22.

• 研究论文 • 上一篇    下一篇

农林生态系统中营养元素N、P、K流动的网络分析

韩博平1, 吴刚2   

  1. 中山大学生物系, 广州 510275;
    2. 中国科学院生态环境研究中心, 北京 100085
  • 收稿日期:1995-03-03 修回日期:1995-07-24 出版日期:1996-01-25 发布日期:1996-01-25
  • 基金资助:

    国家自然科学基金资助项目

Network analysis of N, P and K flows in an agroforestry ecosystem

Han Boping1, Wu Gang2   

  1. 1. Zhongshan University, Cuangzhou 510275;
    2. Research Center for Eco-Environmental Science, Academia Sinica, Beijing 100085
  • Received:1995-03-03 Revised:1995-07-24 Online:1996-01-25 Published:1996-01-25

摘要: 对农林业系统沙兰杨-小麦-玉米群落类型中N、P、K流动网络分析表明,系统中N、P、K的循环指数分别为0.071、0.039、0.139,均小于传统的循环系数(CC等于回归量/吸收量),而在群落中的总滞留时间分别为22.41、79.72、26.57a.

关键词: 农林生态系统, 生态网络, 循环指数, 滞留时间, 消化道传播, 禾本科种子, 形态学, 瘤胃消化, 发芽率

Abstract: A network analysis of N,P and K flows in Populus/Euramericana-Triticum sativum-Zea mays agroforestry ecosystem shows that the cycling index(CI)of N, P and K in the ecosystem is respectively 0.071,0.039 and 0.139,which is smaller than their cycling coefficiency(vCC),being 0.078,0.055 and 0.15,respectively.The total retention time of N,P and K in the ecosystem is 22.41,79.72 and 26.57 years,respectively.

Key words: Agroforestry ecosystem, Econetwork, Retention time, Cycling index, endozoochorous dispersal, rumen digestion, ramineae seed, germination rate, morphology