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Atmospheric Nitrogen and Phosphorus Deposition at Three Sites in Nanjing, China, and Possible Links to Nitrogen Deposition Sources
Author(s) -
Sun Liying,
Liu Yinglie,
Wang Jinyang,
Khalil Mohammad Aslam K.,
Zou Jianwen,
Xiong Zhengqin
Publication year - 2014
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201300692
Subject(s) - deposition (geology) , nitrogen , phosphorus , environmental chemistry , ecosystem , environmental science , chemistry , agronomy , ecology , biology , paleontology , organic chemistry , sediment
Atmospheric deposition is a global and increasing threat to ecosystem function. Here, we analyzed bulk and wet deposition of inorganic N, total phosphorus (TP) and δ 15 N of NH 4 –N and NO 3 –N at three sites in Nanjing from March 2010 to February 2012. Results showed that bulk deposition fluxes of inorganic N and TP averaged 54.82 kg N ha –1 year –1 and 1.82 kg P ha –1 year –1 , respectively. The N/P bulk deposition ratio reached 30/1, leading ecosystems toward P‐limitation. Wet deposition fluxes of inorganic N and TP were 25.65 kg N ha –1 year –1 and 1.29 kg P ha –1 year –1 , respectively, suggesting the potential contribution of inorganic N from dry deposition. Based on the δ 15 N values of NH 4 –N and NO 3 –N and model results, we found that chemical fertilizers and animal manures contributed to the reduced N deposition and fossil fuel and soil emissions contributed to the oxidized N deposition, depending upon the time and site. Agriculture sector contributed almost twice as industry while animal manures contributed significantly within agriculture.