Movement of Nitrogen and Phosphorus between Water and Sediment in Eutrophic Lake Koyama in Tottori.
Movement of Nitrogen and Phosphorus between Water and Sediment in Eutrophic Lake Koyama in Tottori.
复制标题
鸟取县小山湖富营养化水体和沉积物之间氮和磷的运动。
DOI：
10.2965/jswe.20.680
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
H. Ohashi
中科院分区：
文献类型：
--
作者：
H. Fujiyama;H. Nio;H. Ohashi
为了阐明富营养化的鸟取县小山湖沉积物与上覆水之间氮、磷的迁移规律，于1993年和1994年对上覆水中不同形态氮、磷浓度的变化进行了研究。沉积物中产生的铵态氮（NH_4-N）立即扩散或转化为有机氮（Org. - N）。沉积物中氮的矿化不受T-N或Org. -浓度的控制。氮的沉积物，但由水温。沉积物中的氮主要来源于浮游生物尸体中的有机质，孔隙水中T-P浓度远低于上覆水，沉积物中的P以无机态存在。除夏季水体溶解氧浓度较低的时段外，沉积物中的磷不太可能溶出到水体中。
In order to clarify the movement of nitrogen (N) and phosphorus (P) between the sediment and overlying water in the eutrophic Lake Koyama in Tottori, the change in the cocentration of the different forms of N and P was investigated in 1993 and 1994.The total N (T-N) concentration in the overlying water was fairly lower than that of the porewater. The ammonium-N (NH4-N) produced in the sediment was immediately diffused and/or was changed into organic N (Org.-N). The mineralization of N in the sediment was not controlled by the concentration of T-N or Org.-N of the sediment, but by the water temperature. The organic matter derived from the dead body of planktons seemed to be the main N supply to the sediment.The concentration of T-P in the porewater was far lower than that of the overlying water and the P in the sediment existed in the form of Inorg.- P, which suggested that the elution of P from the sediment into the water was not probable, except for the period of the low dissolved oxygen concentration of the water in summer.