Atmospheric inorganic nitrogen deposition to a typical red soil forestland in southeastern China.
A 2-year monitoring study was conducted to estimate nitrogen deposition to a typical red soil forestland in southeastern China. The dry deposition velocities (V(d)) were estimated using big leaf resistance analogy model. Atmospheric nitrogen dry deposition was estimated by combing V(d) and nitrogen compounds concentrations, and the wet deposition was calculated via rainfall and nitrogen concentrations in rainwater. The total inorganic nitrogen deposition was 83.7 kg ha(-1) a(-1) in 2004 and 81.3 kg ha(-1) a(-1) in 2005, respectively. The dry deposition contributed 78.6% to total nitrogen deposition, in which ammonia was the predominant contributor that accounted for 86.1%. Reduced nitrogen compounds were the predominant contributors, accounting for 78.3% of total nitrogen deposition. The results suggested that atmospheric inorganic nitrogen could be attributed to intensive agricultural practices such as excessive nitrogen fertilization and livestock production. Therefore, impacts of atmospheric nitrogen originated from agriculture practices on nearby forest ecosystems should be evaluated.
Fan
Jian-Ling
JL
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71st East Beijing Road, Nanjing, 210008, People's Republic of China.
Hu
Zheng-Yi
ZY
Wang
Ti-Jian
TJ
Zhou
Jing
J
Wu
Cong-Yang-Hui
CY
Xia
Xu
X
D002681:China; D004784:Environmental Monitoring; D009584:Nitrogen / Q000032:analysis* / Q000737:chemistry; D017672:Nitrogen Compounds / Q000032:analysis / Q000737:chemistry; D012987:Soil / Q000032:analysis*; D014197:Trees
D017672:Nitrogen Compounds; D012987:Soil; D009584:Nitrogen