1Redfield A.C. The bio logical contral of chemical factors in the environment [J]. American Scientist, 1958, (46) : 205 - 221.
2Zhang,J. Nutrient elements in large Chinese estuaries [J]Continental Shelf Research, 1996,16(8) :1023-1045.
3Ruttenberg t< C. Development of a sequential extraction method for different forms of phosphorus in marine sediment-[J]. Limnolo- gy and Oeeanogerphy, 1992, a77:1460 1482.
4Eijsink I. M Krom M I-) I.ang 1-). Tile use of sequential extraction techniques for sedimen- tary phosphorus in eastern Mediterranean sediments [J]. Marine Geology. 1997, 139: 147-155.
7Jensen H S. lKaren J. McGlathery R. Forms and availability of sediment phosphorus in carbonate sand of l-ermuda seagrass beds [J]. I.imnology and Oceanogerphy, 1998,4a (5) :799-810.
8Andriux FAmlnot A. two year of phospho- rus speciation in the sediments of the bay of seine (france) [J] Continental shelf Re- search, 1997,17(10) : 1229- 1245.
