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cje ›› 2004, Vol. ›› Issue (4): 69-71.

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Effect of sewage irrigation on fallen leaves of Avicennia marina

CHEN Guizhu1, CHEN Guikui2   

  1. 1. Institute of Environmental Science, Zhongshan University, Guangzhou 510275, China;
    2. South china Agricultural University, Guangzhou 510170, China
  • Received:2002-08-31 Revised:2003-07-03 Online:2004-08-10

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Abstract: During one year study,the biomass of fallen leaves of Avicennia marina in normal sewage water (NW) and five fold concentration sewage water (FW) were higher than that of control (CL),while ten fold concentration sewadge water (TW) was similar to CL.Contents of total Nand total Pin fallen leaves of sewage treatment were higher than that of control.The total amounts of total N,total P and total Zn in fallen leaves was in order of FW>NW≈TW>CL,while for Cd,Ni and Pb, was FW>TW>NW>CL.Their average annual return rates were:N 19.1%,P 21.3%,Cd 21.2%,Ni 21.4%,Pb 23.3%, and Zn 31.5%.All of their return amounts were quite small.

Key words: Phyllostachys praecox, Soil, Fertilization, Organic carbon

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