| 轻组有机质对太湖沉积物氮、磷矿化的影响 |
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| 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. |
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| 作者姓名： | 杨春霞 王圣瑞 金相灿 吴丰昌 |
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| 作者单位： | 中国环境科学研究院湖泊生态环境创新基地,国家环境保护湖泊污染控制重点实验室,北京,100012 |
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| 基金项目： | 国家自然科学基金项目，中央级公益性科研院所基本科研业务专项 |
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| 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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| 关 键 词： | 氮 磷 湖泊沉积物 矿化 连续淹水培养 轻组有机质 |
| 收稿时间： | 2008/12/29 0:00:00 |
| 修稿时间： | 2009/2/9 0:00:00 |
Effect of Light Fraction Organic Matter on Mineralization of N and P in Taihu Lake Sediments |
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| YANG Chun-xi,WANG Sheng-rui,JIN Xiang-can and 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. |
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| Authors: | YANG Chun-xi WANG Sheng-rui JIN Xiang-can and WU Feng-chang |
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| Institution: | YANG Chun-xia,WANG Sheng-rui,JIN Xiang-can,WU Feng-changState Environmental Protection Key Laboratory for Lake Pollution Control,Research Center of Lake Eco-environment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China |
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| Abstract: | The effect of light fraction organic matter(LFOM) on nitrogen(N) and phosphorus(P) mineralization in the sediments of Taihu Lake was investigated under continuously water-logged incubation.The sediments from Yuantouzhu(Y) and Gonghu(G) at different pollution levels were used.The results showed that the effect of LFOM removal on N and P mineralization of different trophic sediments was similar.At the early stage,the amounts of N and P mineralization increased quickly,but later the extent decreased;after reac... |
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| Keywords: | N P lake sediment mineralization continuously water-logged incubation LFOM |
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