title: [Net anthropogenic nitrogen input to Huaihe River Basin, China during 1990-2010].
abstract: Social economy in Huaihe River Basin had undergone enormous changes during 1990-2010. The grain yield had increased by 58%, from 64.14 million tons to 101.21 million tons, and the urbanization rate had increased by 22%, from 13% to 35%. Assessing the negative impacts of these high intensive human activities caused by rapid social development on terrestrial ecosystem would serve as a scientific basis for quantitative management of regional ecology. This paper estimated the spatial and temporal distribution of net anthropogenic nitrogen input (NANI) in Huaihe River Basin during 1990-2010. The results showed that there was an increasing trend in NANI in the period of 1990-2001, and after that this trend was slower. The NANI increased from approximately 17232 kg N · km(-2) · a(-1) in 1990 to a peak of 28771 kg N · km(-2) · a(-1) in 2003, and then declined to 26415 kg N · km(-2) · a(-1) in 2010. Chemical fertilizer and atmospheric deposition were the largest two sources of NANI, followed by food & feed import and biological nitrogen. Contributions from both chemical fertilizer and atmospheric deposition had been increasing continuously, respectively from 64% and 16% in 1990 to 77% and 19%. Our findings implied that the shift from fertilizer-supported agriculture and fossil fuel-supported industry to sci-tech lead economic development is urgently needed.
authors.forename: Wang-shou
authors.initials: WS
authors.lastname: Zhang
authors.forename: Jing-jun
authors.initials: JJ
authors.lastname: Su
authors.forename: Xin-zhong
authors.initials: XZ
authors.lastname: Du
authors.forename: Xu-yong
authors.initials: XY
authors.lastname: Li
mesh_terms: D000383:Agriculture; D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring; D005308:Fertilizers; D006802:Human Activities; D006801:Humans; D009584:Nitrogen / Q000032:analysis*; D045483:Rivers; D014507:Urbanization
chemical_list: D005308:Fertilizers; D009584:Nitrogen