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轻组有机质对太湖沉积物氮、磷矿化的影响

杨春霞 王圣瑞 金相灿 吴丰昌

杨春霞, 王圣瑞, 金相灿, 吴丰昌. 轻组有机质对太湖沉积物氮、磷矿化的影响[J]. 环境科学研究, 2009, 22(9): 1001-1007.
引用本文: 杨春霞, 王圣瑞, 金相灿, 吴丰昌. 轻组有机质对太湖沉积物氮、磷矿化的影响[J]. 环境科学研究, 2009, 22(9): 1001-1007.
YANG Chun-xia, WANG Sheng-rui, JIN Xiang-can, WU Feng-chang. Effect of Light Fraction Organic Matter on Mineralization of N and P in Taihu Lake Sediments[J]. Research of Environmental Sciences, 2009, 22(9): 1001-1007.
Citation: YANG Chun-xia, WANG Sheng-rui, JIN Xiang-can, WU Feng-chang. Effect of Light Fraction Organic Matter on Mineralization of N and P in Taihu Lake Sediments[J]. Research of Environmental Sciences, 2009, 22(9): 1001-1007.

轻组有机质对太湖沉积物氮、磷矿化的影响

基金项目: 国家自然科学基金项目(40703017,40873079);中央级公益性科研院所基本科研业务专项(2007KYYW27)

Effect of Light Fraction Organic Matter on Mineralization of N and P in Taihu Lake Sediments

  • 摘要: 采用连续淹水培养试验研究轻组有机质(LFOM)对鼋头渚(Y)和贡湖(G)2种不同污染程度太湖沉积物氮、磷矿化的影响. 结果表明,去除LFOM并没有改变沉积物氮、磷的矿化趋势. 试验初期,沉积物累积矿化氮、磷量急速上升,之后增速变慢,至峰值后迅速下降,42 d时达到最小值,并持续至试验结束. 经过77 d的培养试验,不同处理的2种不同污染程度沉积物有24%~39%的总氮(TN)和7%~26%的总磷(TP)被矿化;污染较重的沉积物Y的净矿化氮、磷量和矿化速率均高于沉积物G;去除LFOM使沉积物的净矿化氮、磷量和矿化速率均有所降低,其中沉积物Y的净矿化氮、磷量分别降低了110.86和145.26 mg/kg,下降了15%和74%,沉积物G降低了195.13和29.99 mg/kg,下降了40%和50%. 沉积物Y的氮、磷平均矿化速率分别降低了3.01和5.36 mg/(kg·d),沉积物G分别降低了6.35和1.30 mg/(kg·d).

     

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出版历程
  • 收稿日期:  2008-12-29
  • 修回日期:  2009-02-09
  • 刊出日期:  2009-09-25

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