Nitrogen deposition increases N2O emission from an N-saturated subtropical forest in southwest China

Xie, Danni1; Si, Gaoyue1; Zhang, Ting2; Mulder, Jan3; Duan, Lei1,4

2018-12

10.1016/j.envpol.2018.09.113

ENVIRONMENTAL POLLUTION   影响因子和分区

0269-7491

1873-6424

Nitrous oxide (N2O) is a major greenhouse gas, with elevated emission being reported from subtropical forests that receive high nitrogen (N) deposition. After 10 years of monthly addition of ammonium nitrate (NH4NO3) or sodium nitrate (NaNO3) to a Mason pine forest at Tieshanping, near Chongqing city in Southwest China, the simulated N deposition was stopped in October 2014. The results of soil N2O emissions monitoring in different seasons during the nitrogen application period showed that nitrogen addition significantly increased soil N2O emission. In general, the N2O emission fluxes were positively correlated to nitrate (NO3-) concentrations in soil solution, supporting the important role of denitrification in N2O production, which was also modified by environmental factors such as soil temperature and moisture. After stopping the application of nitrogen, the soil N2O emissions from the treatment plots were no longer significantly higher than those from the reference plots, implying that a decrease in nitrogen deposition in the future would cause a decrease in N2O emission. Although the major forms of N deposition, NH4+ and NO3-, had not shown significantly different effects on soil N2O emission, the reduction in NH4+ deposition may decrease the NOT concentrations in soil solution faster than the reduction in NOT deposition, and thus be more effective in reducing N2O emission from N-saturated forest soil in the future. (C) 2018 Elsevier Ltd. All rights reserved.

Denitrification Acidification Fertilizing experiment Masson pine

SCI ; EI

英语

其他

Tsinghua University Initiative Scientific Research Program[2015Z22029]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000449892700109

ELSEVIER SCI LTD

20184506043135

Acidification ; Denitrification ; Forestry ; Greenhouse gases ; Nitrates ; Nitrogen ; Nitrogen oxides ; Sodium nitrate ; Soil moisture ; Temperature ; Tropics

Meteorology:443 ; Air Pollution Sources:451.1 ; Soils and Soil Mechanics:483.1 ; Thermodynamics:641.1 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Food Processing Operations:822.2

ENVIRONMENT/ECOLOGY

Web of Science

1.Tsinghua Univ, Sch Environm, State Key Lab Environm Simulat & Pollut Control, Beijing 100084, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen Key Lab Soil & Groundwater Pollut Contro, Shenzhen 518055, Guangdong, Peoples R China
3.Norwegian Univ Life Sci, Fac Environm Sci & Nat Resource Management, Box 5003, N-1432 As, Norway
4.Tsinghua Univ, Collaborat Innovat Ctr Reg Environm Qual, Beijing 100084, Peoples R China

Xie, Danni,Si, Gaoyue,Zhang, Ting,et al. Nitrogen deposition increases N2O emission from an N-saturated subtropical forest in southwest China[J]. ENVIRONMENTAL POLLUTION,2018,243:1818-1824.

Xie, Danni,Si, Gaoyue,Zhang, Ting,Mulder, Jan,&Duan, Lei.(2018).Nitrogen deposition increases N2O emission from an N-saturated subtropical forest in southwest China.ENVIRONMENTAL POLLUTION,243,1818-1824.

Xie, Danni,et al."Nitrogen deposition increases N2O emission from an N-saturated subtropical forest in southwest China".ENVIRONMENTAL POLLUTION 243(2018):1818-1824.