| 滇池水生植物分布对沉积物间隙水中不同形态氮的影响 |
| |
| 引用本文： | 丁帅,焦立新,王圣瑞,张蕊,肖焱波,李乐,余佑金.滇池水生植物分布对沉积物间隙水中不同形态氮的影响[J].环境科学研究,2016,29(5):700-707. |
| |
| 作者姓名： | 丁帅 焦立新 王圣瑞 张蕊 肖焱波 李乐 余佑金 |
| |
| 作者单位： | 1.云南民族大学民族医药学院, 云南 昆明 650500 ;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, 北京 100012 ;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, 北京 100012 ;云南民族大学植物营养与新型肥料研究所, 云南 昆明 650500 |
| |
| 基金项目： | 国家水体污染控制与治理科技重大专项(2012ZX07102-004)；国家自然科学基金项目(U1202235) |
| |
| 摘 要： | 为揭示水生植物分布对滇池沉积物间隙水中各形态氮质量浓度的影响,于2015年6月在滇池分别采集有植物区域和无植物区域的沉积物柱状样,检测间隙水及上覆水中DTN(溶解性总氮)、NH4+-N、NO3--N和DON(溶解性有机氮)的质量浓度,分析其垂向变化特征以及水生植物对间隙水中各形态氮的释放控制效果. 结果表明:①水生植物改变了柱状沉积物间隙水中不同形态氮的分布规律,并且这种改变随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中DON的贡献率,有植物分布区域ρ(DON)对ρ(DTN)的平均贡献率为41.05%,无植物区域可达58.48%；③水生植物显著抑制了沉积物中无机氮的释放,促进了DON的转化,同一采样点有植物区域NH4+-N和NO3--N的沉积物-水界面扩散通量分别比无植物区域平均降低了87.52%和91.99%；④水生植物生长显著削减了沉积物间隙水中氮的质量浓度,其中ρ(DON)的削减率达到了53.27%~80.42%. 研究显示,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.
|
| 关 键 词： | 水生植物 沉积物 间隙水 氮 控制效果 |
| 收稿时间： | 2015/11/24 0:00:00 |
| 修稿时间： | 2016/2/1 0:00:00 |
Concentrations of Different Nitrogen Forms in Interstitial Water along Sediment Columns as Affected by Aquatic Plants in Dianchi Lake |
| |
| DING Shuai,JIAO Lixin,WANG Shengrui,ZHANG Rui,XIAO Yanbo,LI Le and YU Youjin.Concentrations of Different Nitrogen Forms in Interstitial Water along Sediment Columns as Affected by Aquatic Plants in Dianchi Lake[J].Research of Environmental Sciences,2016,29(5):700-707. |
| |
| Authors: | DING Shuai JIAO Lixin WANG Shengrui ZHANG Rui XIAO Yanbo LI Le and YU Youjin |
| |
| Affiliation: | School of Ethnic Medicine, Yunnan Minzu University, Kunming 650500, China ;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Institute of Plant Nutrition and Fertilization, Yunnan Minzu University, Kunming 650500, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,School of Ethnic Medicine, Yunnan Minzu University, Kunming 650500, China ;Institute of Plant Nutrition and Fertilization, Yunnan Minzu University, Kunming 650500, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China and State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
| |
| Abstract: | In order to investigate the effects of aquatic plants on nitrogen forms in sediment interstitial water sampling from areas with plants and no plants in the same site of Dianchi Lake, the concentrations of DTN, NH4+-N, NO3--N and DON in interstitial water of sediment columns were studied. Based on the nitrogen concentration data from interstitial water and the overlying counterpart, the Fick Law was applied to mimic the concentration of different nitrogen forms from the interstitial water within the sediments column as affected or controlled by the aquatic plant distribution. The results showed:1) Aquatic plants changed the concentrations of different nitrogen forms within the sediment interstitial water, with variation from site to site. 2) Aquatic plants reduced significantly the contribution from the concentration of dissolved organic nitrogen (DON) within the sediment interstitial water. The average contribution of DON with aquatic plants was 41.05%, while that without reached 58.48%. 3) Aquatic plants inhibited significantly the release of inorganic nitrogen from sediments and promoted the transformation of DON. At the same sampling site, NH4+-N and NO3--N diffusion flux with aquatic plants at the sediment-water interface decreased by 87.52% and 91.99% respectively over those without. 4) The growth of aquatic plants exhausted significantly the mass concentration of nitrogen within the sediment interstitial water, especially that of DON; the reduction rate of DON from interstitial water within the sediment was from 53.27% to 80.42%. Studies showed that as surrounded by the microorganism and many active enzymes, the activity of the aquatic plant root promoted the mineralization of organic nitrogen and reduced the nitrogen concentration within the sediments. |
| |
| Keywords: | aquatic plant sediment interstitial water nitrogen control effect |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境科学研究》浏览原始摘要信息 |
|
点击此处可从《环境科学研究》下载全文 |
|
