Moffat A S. Global nitrogen overload problem grows critical[J].Science, 1998,279:988-989.
[2]
Benjamin L Peierls, Nina F Caraco,Mihael L Pace. Human influence on river nitrogen[J]. Nature,1991,350(4):386-387.
[3]
Michel Meybeck.Carbon, nitrogen, and phosphorus transport by world river[J].American Journal of Science,1982,282:401-450.
[4]
Krug E C, Winstanley D.The need for comprehensive and consistent treatment of the nitrogen cycle on nitrogen cycling and mass balance studies: terrestrial nitrogen cycle[J].The Science of the Total Environ ment, 2002,(293):1-29.
Xing G X & Zhu Z L.An assessment of N loss from agricultural field to the environment in China[J].Nutrient Cycling in Agroecosystems, 2000, 57:67-73.
[7]
Duan Shuiwang, Zhang shen & Huang Hongyu. Transport of dissolved inorganic nitrogen from the major rivers to estuaries in China[J].Nutrient Cycling in Agroecosystems, 2000, 57: 13-22.
Meybeck M and Helmer R.The quality of rivers from pristine stage to global pollution[J].Palaeogeogr,Palaeoclimatol, Palaeoecol(Global Planet Change Sect),1989, 75: 283-309.