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入洱海河流临湖段底泥氮的分布

张闻涛 邢 奕 卢少勇 薛 巍 蔡珉敏 曲洁婷

张闻涛, 邢 奕, 卢少勇, 薛 巍, 蔡珉敏, 曲洁婷. 入洱海河流临湖段底泥氮的分布[J]. 环境科学研究, 2015, 28(2): 213-218.
引用本文: 张闻涛, 邢 奕, 卢少勇, 薛 巍, 蔡珉敏, 曲洁婷. 入洱海河流临湖段底泥氮的分布[J]. 环境科学研究, 2015, 28(2): 213-218.
ZHANG Wentao, XING Yi, LU Shaoyong, XUE Wei, CAI Minmin, QU Jieting. Characteristics of Nitrogen Distribution in Sediments of Inflow Rivers of Erhai Lake, China[J]. Research of Environmental Sciences, 2015, 28(2): 213-218.
Citation: ZHANG Wentao, XING Yi, LU Shaoyong, XUE Wei, CAI Minmin, QU Jieting. Characteristics of Nitrogen Distribution in Sediments of Inflow Rivers of Erhai Lake, China[J]. Research of Environmental Sciences, 2015, 28(2): 213-218.

入洱海河流临湖段底泥氮的分布

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07105-002,2013ZX07101-014);中央级公益性科研院所基本科研业务专项(2012-YSKY-14)

Characteristics of Nitrogen Distribution in Sediments of Inflow Rivers of Erhai Lake, China

  • 摘要: 于2013年7月在洱海流域采集了17条主要入洱海河流临湖段的底泥和上覆水样品,测定分析样品中TN、NH3-N和NO3--N的含量,揭示底泥中氮素的分布特征,并探讨底泥与上覆水中氮素含量的相关性. 结果表明:①17条入洱海河流临湖段底泥中w(TN)为23.10~310.60 mg/kg,平均值为141.66 mg/kg. ②对w(TN)有显著性差异的河流进行分组,并按照w(TN)由低到高排序为清碧溪、双鸳溪<白石溪<灵泉溪、龙溪、阳溪<桃溪、梅溪、隐仙溪、弥苴河<莫残溪、波罗江<永安江<锦溪<中和溪、罗时江、白鹤溪. 其中,各组之内河流间w(TN)无显著差异,而各组之间w(TN)差异显著(P=0.05). ③底泥中w(NH3-N)、w(ON)与w(TN)呈极显著正相关,氮存在形态以ON为主. 其中,“北三江”临湖段底泥的厌/缺氧程度高,底泥中w(NO3--N)占w(TN)的比例明显低于西部入洱海河流;上覆水中ρ(TN)与底泥中w(TN)、w(ON)呈极显著正相关.

     

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