6LEINWEBER L,MEISSNER R,ECKHARDT K U,et al.Management effects on forms of phosphorus in soil and leaching losses[J].European Jonrnal of Soil Science,1999,50:413-424.
7SHARPLEY A N,REKOLAINEN.Phosphorus in agriculture and its environmental implication[M]//TUNNEY H,eds.Phosphorus loss from soil to water.CAB International,Wallingford,1997.
8MILLER R W,DONAHUE R L.Soil in our environment[M].7th.New Jersey:Prentice-Hall,1995.