Publication Date:
2014-11-12
Description:
To understand both spatial and temporal changes in nitrogen inputs to the Yangtze River Basin (YRB), we collected decadal statistical data for 1980, 1990, 2000 and 2010 at the county level and the annual statistical data for the period 1980?2010 at the provincial level of China. Based on these datasets, we estimated the nitrogen inputs, including the atmospheric deposition, synthetic N fertilizer, biological N fixation and recycling reactive N inputs, such as N from human waste and animal excrement, crop residue recycled as manure, and N emission from burning crop residue. The results showed that, geographically, the variation of the total amount of N input during the last 30 years ( ?N?=?N 2010???N 1980 ) has increased about 0?50 kg ha ?1 over most of the area of the YRB. Moreover, it has increased dramatically by about 50?300 kg ha ?1 in the Sichuan Basin, the Han River Basin, the Poyang and Dongting lake basins, and th...
Print ISSN:
1748-9318
Electronic ISSN:
1748-9326
Topics:
Biology
,
Energy, Environment Protection, Nuclear Power Engineering
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