7[2]Mitsch W J,Gosselin T G.2000.Wetlands[ M].New York:Van Nostrand Reinhold Company Inc..89 -125.
8[3]Stepanauskas R,Leonardson L,Tranvik LJ.1999.Bioavailability of wetland derived DON to fresh water and marine bacteria plankton[ J ].Limnol Oceanogr,44:1 477-1 485.
9[4]Denmead O T.1983.Micrometeorological method for measuring gaseous losses of nitrogen in the field[ C ]//Freney J R,Simpson J R.Gaseous Losses of Nitrogen from Plant-soil Systems.Martinus Nighoff DiWjunk Publishers.133-157.
10[5]Dentener F J,Crutzen P J.1994.A three dimensional model of the global ammonia cycle[J].J.Atmos.Chem.,19:331 -369.
