RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2005, Vol. 14 >> Issue (4): 507-511.

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FORMS OF CHEMICALS NITROGEN AND PHOSPHORUS IN SEDIMENTS IN A SHALLOW, PLATEAU LAKE

HU Kai(1,2), KE Peng-zhen(3), WU Yong-hong(1), CHEN Xiao-guo(3), SHEN Yin-wu,LIU Jian-tong(1)   

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-07-20
  • Contact: HU Kai

Abstract: The forms of nitrogen and phosphorus in the three interfaces of sediments, interstitial water and overlaying water were studied in the present study. The CaP takes up the largest proportion in the total Phosphorus, followed by Org/BactP and residual Phosphorus. The content of total Phosphorus was very high, with the average of 2.63mg/g, while the nitrite was very low and there was no relative chemic counterbalance among nitrate, nitrite and ammoniate, because the inorganic nitrogen circle was also affected by organic nitrogen in water and sediments. The results also showed that there was perfect linear relationship between FeP in sediments and PO\+\{3-\}\-4-P in interstitial water, logarithmic relationship between FeP in sediments and Eh of interstitial water. The average net inner load of Phosphorus in sediments of these two bays in Dianchi Lake was 4.25g·m\+\{-2\}·a\+\{-1\}, and the contents of phosphorus and nitrogen of the 0~5 cm sediments in these two bays were 148.3t、218.94t,respectively.

Key words: Dianchi Lake, sediments, phosphorus forms, inorganic nitrogen

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