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JENSEN (1998) six-step separation of November 2003 and May 2004, the Bohai Bay sediment samples collected P morphological analysis, using laboratory culture at the same time on the May 2004 acquisition of the Bohai Bay A21 bits of nutrients in the sediment - water interface exchange research results show that: 1, the physical and chemical properties of sediment, the sediment nutrient level and geographical environment have. Overall trend is sediment finer the higher the clay content, the higher the level of nutrients; offshore nearer the more serious pollution, pollution of the smaller farther offshore. Bohai Bay sediment particle size distribution from the intertidal sand and sandy silt, clayey silt of the Bohai Bay the Omo station's gradual transition to. , Bohai Bay surface sediment phosphorus presented the situation to the the the Bohai Bay Omo station increases from the intertidal zone, total phosphorus mainly inorganic phosphorus, total phosphorus and organic phosphorus is highly correlated, indicating that the two are closely related. Phosphorus forms, various forms of P content in the sedimentary environment is closely related to the P morphological content of different depositional environments. The core sediments P FAP and Ref phosphorus, FAP accounts for more than 43% of the entire P form, an average of about 56% or more, Ref accounted for more than 24%, an average of about 37% or more. Followed Lea-P, such morphology P is an average of about 5%, and finally followed by the Fe-P, CFAP, and Lsor-P, the content of these three forms are less than 10% or less. This indicates that the main source of the Bohai Bay sediment P terrigenous input and sewage discharged into. Conclusion (3), we know that more than half of the phosphorus in the Bohai Bay sediments can not be bioavailable. 5, Bohai Bay A21 stations, TIN exchange mainly NO 3 -N NO 3 -N exchange about TIN exchange compared to state 99 %; charge-oxygen environment, NO 3 -N exchange about TIN exchange of 64%; nitrogen filling environment NO 3 -N exchange about TIN exchange 84 percent. Added mercury chloride under three states, the NO 3 -N exchange about are also accounted for more than 50% of the TIN exchange. Bioturbation nutrients in the sediment - water interface exchange. Bioturbation stations PO Bohai Bay A21 4 3 - P in the sediment - water interface exchange flux decreases; relative contrast state changed NH 4 -N exchange direction, while the NH 4 -N NO 3 -N deposition increased exchange fluxes at the sediment - water interface; material - water interface exchange flux decreases; NO 2 -N exchange fluxes at the sediment - water interface increases slightly. 7, the oxygen-enriched conducive No to 3 -N and the of NO 2 -N of the exchange, the oxygen-depleted inhibit their exchange. The poor oxygen conducive NH 4 -N in the sediment - water interface exchange, oxygen-enriched not conducive NH 4 -N exchange.
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