| 三峡库区干支流落干期消落带土壤可转化态氮含量及分布特征 |
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| 引用本文： | 何立平,刘丹,于志国,周斌,杨振宇,兰国新,郭冬琴,林俊杰.三峡库区干支流落干期消落带土壤可转化态氮含量及分布特征[J].环境科学,2016,37(3):950-954. |
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| 作者姓名： | 何立平 刘丹 于志国 周斌 杨振宇 兰国新 郭冬琴 林俊杰 |
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| 作者单位： | 重庆三峡学院三峡库区水环境演变与污染防治重庆高校市级重点实验室, 重庆 404100;四川大学建筑与环境工程学院, 成都 610225;重庆三峡职业学院农林科技系, 重庆 404100;南京信息工程大学水文气象学院, 南京 210044;辽宁省气象科学研究所, 沈阳 110166;重庆三峡学院三峡库区水环境演变与污染防治重庆高校市级重点实验室, 重庆 404100;重庆三峡学院三峡库区水环境演变与污染防治重庆高校市级重点实验室, 重庆 404100;重庆三峡学院三峡库区水环境演变与污染防治重庆高校市级重点实验室, 重庆 404100;重庆三峡学院三峡库区水环境演变与污染防治重庆高校市级重点实验室, 重庆 404100;中国科学院重庆绿色智能技术研究院中国科学院水库水环境重点实验室, 重庆 400714 |
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| 基金项目： | 国家自然科学基金项目(41301248);中国科学院水库水环境重点实验室开放基金项目(RAE2014BA01B);重庆高校市级重点实验室开放基金项目(13QN14,WEPKL2013MS-06);重庆三峡学院校青年项目(12QN18);南京信息工程大学人才启动项目(2015r56);重庆三峡学院土壤生态过程与生态重建创新团队项目;教育部春晖计划项目(Z2015133) |
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| 摘 要： | 为探明三峡支流水体富营养化频发与库岸消落带土壤氮素"源-库"关系转化之间的内在关系,采用分级浸提法,分析了三峡库区长江万州段干流、苎溪河支流、密溪河支流消落带落干期土壤可转化态氮含量和分布特征.结果表明,与三峡库区万州段干流相比,支流消落带落干期土壤有机质和总氮含量较高,而阳离子交换量(CEC)和p H值较低.三峡干支流消落带土壤可转化态氮(TF-N)以OSF-N(有机态和硫化物结合态)为主,且含量上OSF-NIMOF-N(铁锰氧化物结合态氮)IEF-N(离子交换态氮)CF-N(碳酸盐结合态氮);而空间分布上,TF-N表现为:密溪河苎溪河长江干流,4种TF-N形态中IEF-N和OSF-N在干支流间无显著差异,而CF-N和IMOF-N分布与TF-N相反,是造成干支流消落带TF-N差异的主要因素.
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| 关 键 词： | 氮形态 干支流 消落带 富营养化 落干期 三峡库区 |
| 收稿时间： | 7/4/2015 12:00:00 AM |
| 修稿时间： | 2015/10/9 0:00:00 |
Distribution and Content of Transferable Nitrogen in the Soil of Water Level Fluctuating Zones of Mainstream and Its Tributary of Three Gorges Reservoir Areas During the Dry Period |
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| HE Li-ping,LIU Dan,YU Zhi-guo,ZHOU Bin,YANG Zhen-yu,LAN Guo-xin,GUO Dong-qin and LIN Jun-jie.Distribution and Content of Transferable Nitrogen in the Soil of Water Level Fluctuating Zones of Mainstream and Its Tributary of Three Gorges Reservoir Areas During the Dry Period[J].Chinese Journal of Environmental Science,2016,37(3):950-954. |
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| Authors: | HE Li-ping LIU Dan YU Zhi-guo ZHOU Bin YANG Zhen-yu LAN Guo-xin GUO Dong-qin and LIN Jun-jie |
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| Institution: | Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Georges University, Chongqing 404100, China;College of Construction and Environmental Engineering, Sichuan University, Chengdu 610225, China;Department of Agricultural and Forestry Science and Technology, Chongqing Three Gorges Vocation College, Chongqing 404100, China;College of Hydrometeorology, Nanjing University of Information Science and Technology, Nanjing 210044, China;Liaoning Institute of Meteorological Science, Shenyang 110166, China;Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Georges University, Chongqing 404100, China;Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Georges University, Chongqing 404100, China;Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Georges University, Chongqing 404100, China;Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Georges University, Chongqing 404100, China;Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China |
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| Abstract: | In order to find the intrinsic correlation between water eutrophication and transformation of nitrogen in soil of water level fluctuating zone(WLFZ) of Three Gorges Reservoir Areas(TGRA), the method of sequential extraction process was applied to analyze the content and distribution characteristics of total transferable nitrogen(TF-N) in the mainstream of Yangtze River (Wanzhou section) and its tributaries of Mixi and Zhuxi River. The results showed that, compared with the main stream, the contents of soil organic matter (SOM) and total nitrogen (TN) were higher, while cation exchange capacity(CEC) and pH value were lower in the tributaries during the dry period. The main species of TF-N in soil was organic matter-sulfide form of nitrogen (OSF-N) in the WLFZ and the content of different TF-N species was in the order of OSF-N>iron-manganese oxide form of nitrogen (IMOF-N)>ion extractable form of nitrogen (IEF-N) >carbonate form of nitrogen (CF-N). The spatial distribution pattern of total TF-N was in the order of Zhuxi River > Mixi Valley > the main stem of Yangtze River. There were no significant differences between IEF-N and OSF-N contents both in the main and tributaries of Yangtze River. The distribution of CF-N and IMOF-N had similar patterns, whereas the TF-N showed a reverse pattern in comparison with the former two species in the main and tributary of Yangtze River, which was a main factor of TF-N differences between the main steam and tributaries of the Yangtze River. |
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| Keywords: | nitrogen species mainstream and its tributaries water level fluctuating zone eutrophication dry period Three Gorges Reservoir Areas |
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