globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13485
论文题名:
A meta-analysis of fertilizer-induced soil NO and combined NO+N2O emissions
作者: Liu S.; Lin F.; Wu S.; Ji C.; Sun Y.; Jin Y.; Li S.; Li Z.; Zou J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:6
起始页码: 2520
结束页码: 2532
语种: 英语
英文关键词: emission factor ; fertilizer ; meta-analysis ; nitric oxide ; nitrous oxide ; trace gas
英文摘要: Soils are among the important sources of atmospheric nitric oxide (NO) and nitrous oxide (N2O), acting as a critical role in atmospheric chemistry. Updated data derived from 114 peer-reviewed publications with 520 field measurements were synthesized using meta-analysis procedure to examine the N fertilizer-induced soil NO and the combined NO+N2O emissions across global soils. Besides factors identified in earlier reviews, additional factors responsible for NO fluxes were fertilizer type, soil C/N ratio, crop residue incorporation, tillage, atmospheric carbon dioxide concentration, drought and biomass burning. When averaged across all measurements, soil NO-N fluxes were estimated to be 4.06 kg ha−1 yr−1, with the greatest (9.75 kg ha−1 yr−1) in vegetable croplands and the lowest (0.11 kg ha−1 yr−1) in rice paddies. Soil NO emissions were more enhanced by synthetic N fertilizer (+38%), relative to organic (+20%) or mixed N (+18%) sources. Compared with synthetic N fertilizer alone, synthetic N fertilizer combined with nitrification inhibitors substantially reduced soil NO emissions by 81%. The global mean direct emission factors of N fertilizer for NO (EFNO) and combined NO+N2O (EFc) were estimated to be 1.16% and 2.58%, with 95% confidence intervals of 0.71–1.61% and 1.81–3.35%, respectively. Forests had the greatest EFNO (2.39%). Within the croplands, the EFNO (1.71%) and EFc (4.13%) were the greatest in vegetable cropping fields. Among different chemical N fertilizer varieties, ammonium nitrate had the greatest EFNO (2.93%) and EFc (5.97%). Some options such as organic instead of synthetic N fertilizer, decreasing N fertilizer input rate, nitrification inhibitor and low irrigation frequency could be adopted to mitigate soil NO emissions. More field measurements over multiyears are highly needed to minimize the estimate uncertainties and mitigate soil NO emissions, particularly in forests and vegetable croplands. © 2016 John Wiley & Sons Ltd
资助项目: This work was supported by the National Basic Research Program of China (2015CB150502), National Natural Science Foundation of China (NSFC, 41225003, 41301244), Fundamental Research Funds for the Central Universities (KYTZ201404, KYZ201621), Natural Science Foundation of Jiangsu Province (BK20130695), the Ministry of Education 111 Project (B12009). We are grateful to many researchers who measured the soil NO fluxes and their work is the basis of the present data integration, which would in turn guarantee access of a deeper understanding of global soil NO emissions.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60952
Appears in Collections:影响、适应和脆弱性

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作者单位: Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing, China

Recommended Citation:
Liu S.,Lin F.,Wu S.,et al. A meta-analysis of fertilizer-induced soil NO and combined NO+N2O emissions[J]. Global Change Biology,2017-01-01,23(6)
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