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Chinese Journal of Applied Ecology ›› 1996, Vol. 7 ›› Issue (1): 19-22.

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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

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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