Balance system of nutrient at the sediment interface in the culture area

Based on the field investigation in the cultural water of Daya Bay, 1999, the contents of total nitrogen and phosphorus in water, surface sediment and core samples were analyzed. At last the article concluded that ⑴the impact of nutrient in the sediment on water was due to surface sediment; ⑵the solubility rate of total nitrogen was higher than of total phosphorus in the sediment,and the balance system of nitrogen near the sediment interface was easy destroyed; ⑶phosphorus inwater was absorbed by the sediment and it was hardly released from the sediment; ⑷the content of total phosphorus in overlying waters was high.Based on those conclusions,it is article suggested that the content of total nitrogen in the sediment was taken for monitoring factor of red tide.