黄河三角洲水库底泥中氮、磷特征及其与水体磷富营养化关系

Nitrogen and Phosphorus Characteristics in the Reservoir Sediments of Yellow River Delta and their Relationship to the Phosphorus Eutrophication of the Water

以黄河三角洲广南水库为研究对象，周年采集水库底泥与水样研究其N、P特征与水体富营养化的关系。结果表明：广南水库底泥中全氮（TN）存在一定的富集作用，底泥中TN含量（0．65～1．26g／kg）与有机质（TOC）含量呈极显著正相关关系（r=0．797^＊＊），其主要来自生物有机质的长期沉淀；底泥中总磷（TP）含量相对稳定（0．54～0．69g／kg），主要来源于黄河泥沙的沉淀；水库水体磷（WTP）含量0．011～0．214mg／L，水体已经达到富营养化水平，黄河水中的磷是广南水库水体中磷的主要来源，而底泥中有效氮（AN）能促进底泥中磷向水体中的转移转化。

The results were as follows： the total nitrogen （TN） contents of sediments of Yellow River Delta Guangnan reservoir were 0. 65 - 1.26 mg/L and there existed a rich collection function in the sediments. There was a significant positive correlation between TN and total organic carbon （TOC） in the sediments of the Yellow River Delta Guangnan reservoir （ r = 0. 797^ ＊ ＊ ） . The phosphorus of sediments （TP） came mainly from the silt of the Yellow River. Its content in the sediments was relatively stable. The total phosphorus contents of the water body （WTP）of Guangnan reservoir were 0.011 - 0.214 mg/L and it had already reached the eutrophication level. The phosphorus in the water body came mainly from the phosphorus of Yellow River. The phosphorus＇trans- formation from sediments to the water body was sped by the available nitrogen.