水生植物对滇池沉积物间隙水氮形态特征的影响及其释放控制效果

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• 英文论文题名：Influence and release control effect of aquatic macrophytes on nitrogen forms of interstitial water in Dianchi Lake sediment
• 论文作者：丁帅 ; 肖焱波 ; 王圣瑞 ; 张蕊 ; 焦立新 ; 李乐 ; 余佑金
• 英文论文作者：DING Shuai ; XIAO Yan-bo ; WANG Sheng-rui ; ZHANG Rui ; JIAO Li-xin ; LI Le ; YU You-jin ; School of Ethnic Medicine ; Yunnan Minzu University ; State Key Laboratory of Environmental Criteria and Risk Assessment ; Chinese Research Academy of Environmental Sciences ; Research Center of Lake Eco-Environment ; State Environmental Protection Key Laboratory for Lake Pollution Control ; Chinese Research Academy of Environmental Sciences
• 年：2015
• 作者机构：中国环境科学研究院环境基准与风险评估国家重点实验室;中国环境科学研究院国家环境保护湖泊污染控制重点实验室湖泊生态环境创新基地;云南民族大学民族医药学院;
• 论文关键词：水生植物 ; 沉积物 ; 间隙水 ; 氮 ; 控制效果
• 英文论文关键词：aquatic macrophytes ; sediment ; interstitial water ; nitrogen ; control effect
• 会议召开时间：2015-11-26
• 会议录名称：2015年水资源生态保护与水污染控制研讨会论文集
• 语种：中文
• 分类号：X173;X524
• 学会代码：HJKP
• 会议名称：2015年水资源生态保护与水污染控制研讨会
• 会议地点：中国海南海口
• 主办单位：中国环境科学学会、哈尔滨师范大学
• 学会名称：中国环境科学学会
• 页数：8
• 文件大小：1134k
• 原文格式：D
• 会议级别：全国

摘要

研究了滇池不同湖区沉积物间隙水氮形态组成,沉积物-水界面扩散通量,探讨了水生植物分布对沉积物间隙水氮形态特征的影响及其释放控制效果,结果表明:(1)水生植物改变了柱状沉积物间隙水不同形态氮的分布规律,但因分布湖区不同而表现不尽一致;(2)水生植物显著降低了沉积物间隙水DON贡献百分比,有植物分布区DON平均贡献为41%,而无植物DON平均贡献可达到59%;(3)水生植物显著抑制了沉积物无机氮的释放,促进了DON的转化,同一站点有植物区域NH4+-N和NO3--N沉积物-水界面扩散通量分别比无植物区域平均降低了87%和92%;(4)水生植物生长显著削减沉积物间隙水氮的浓度,尤其是DON,削减率达到了50%~80%,可见水生植物根系作为微生物和多种活性酶的主要载体,为沉积物有机氮的矿化降解起到了促进作用。
Nitrogen forms of sediment interstitial water and nitrogen diffusion flux of sediment-water interface in the different Dianchi Lake were studied. Influence and release control effect of aquatic macrophytes distribution on characteristics of nitrogen forms in sediment interstitial water were discussed. The results showed:(1) Aquatic macrophytes changed the different nitrogen forms distribution in the columnar sediment interstitial water, but which were not consistent with the distribution of the lake area;(2) Aquatic macrophytes significantly decreased the percentage of the sediment interstitial water DON contribution. The average contribution of DON in vegetated areas was 41%, while that in non-vegetated areas reached 59%;(3) Aquatic macrophytes significantly inhibited the release of inorganic nitrogen in sediments and promoted the transformation of DON. In the same site, the NH4+-N and NO3--N diffusion flux at sediment-water interface in vegetated areas had respectively decreased by 87% and 92% compared with the non-vegetated areas;(4) The growth of aquatic macrophytes significantly reduced concentration of nitrogen in sediment interstitial water, especially DON, and reduction rate of the sediment interstitial water DON had reached 50%~80%. As the main carrier of the microorganism and many active enzymes, the root of aquatic macrophytes promoted the mineralization of organic nitrogen in sediments

引文

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