Nitrogen budget in the Changjiang River drainage area

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	Nitrogen budget in the Changjiang River drainage area
	Jiang Tao1,2 ; Yu Zhiming1 ; Song Xiuxian1 ; Cao Xihua1
刊名	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2012-07-01
卷号	30 期号:4 页码:654-667
关键词	nitrogen budget eutrophication Changjiang (Yangtze) River drainage area riverine nitrogen transport
ISSN号	0254-4059
通讯作者	Yu, ZM (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China.
英文摘要	We established a budget model of nitrogen (N) inputs and outputs between watersheds and waterbodies to determine the sources of riverine N in the Changjiang (Yangtze) River drainage area. Nitrogen inputs in the budget included N from synthetic fertilizer, biological fixation by leguminous and other crops, wet/dry atmospheric deposition, excreta from humans and animals, and crop residues. The total N input was estimated to be 17.6 Tg, of which 20% or 3.5 Tg N was transported into waterbodies. Of the total N transported into waterbodies, the largest proportion was N from animal waste (26%), followed by N from atmospheric wet/dry deposition (25%), synthetic fertilizer N (17%), N in sewage wastes (17%), N in human waste from rural areas (6%) and industrial wastewater N (9%). We studied the spatial patterns of N inputs and outputs by dividing the Changjiang River drainage area into four sub-basins, from upstream to downstream: the Tongtian River drainage area (TTD, the headwater drainage area, 138 000 km(2), less disturbed by human activities); the Jinsha River drainage area (JSD, 347 000 km(2), less disturbed by human activities, approx. 3 500 km upstream of the Changjiang estuary); the Pingshan-Yichang drainage area (PYD, 520 500 km(2), large-scale human disturbance, about 2 000 km upstream of the Changjiang estuary); and the Yichang-Datong drainage area (YDD, 699 900 km(2), large-scale human disturbance, approx. 620 km upstream of the Changjiang estuary). The average N input into waterbodies was 2.3, 7.3, 24.1, and 28.2 kg N/ha in the TTD, JSD, PYD, and YDD sub-basins, respectively, suggesting an increase of N-components of more than 10 times from upstream to downstream areas.
学科主题	Limnology ; Oceanography
收录类别	SCI
原文出处	10.1007/s00343-012-1306-5
语种	英语
WOS记录号	WOS:000305906700018
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/12433]
专题	海洋研究所_海洋生态与环境科学重点实验室海洋研究所_海洋地质与环境重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Jinan Univ, Res Ctr Harmful Algae & Marine Biol, Guangzhou 510632, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Jiang Tao,Yu Zhiming,Song Xiuxian,et al. Nitrogen budget in the Changjiang River drainage area[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2012,30(4):654-667.
APA	Jiang Tao,Yu Zhiming,Song Xiuxian,&Cao Xihua.(2012).Nitrogen budget in the Changjiang River drainage area.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,30(4),654-667.
MLA	Jiang Tao,et al."Nitrogen budget in the Changjiang River drainage area".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 30.4(2012):654-667.