气候变化领域集成服务门户(CCPortal): Nitrogen fertilization increases N2O emission but does not offset the reduced radiative forcing caused by the increased carbon uptake in boreal forests

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DOI	10.1016/j.foreco.2024.121739
	Nitrogen fertilization increases N2O emission but does not offset the reduced radiative forcing caused by the increased carbon uptake in boreal forests
	Oquist, Mats G.; He, Hongxing; Bortolazzi, Anna; Nilsson, Mats B.; Rodeghiero, Mirco; Tognetti, Roberto; Ventura, Maurizio; Egnell, Gustaf
发表日期	2024
ISSN	0378-1127
EISSN	1872-7042
起始页码	556
卷号	556
英文摘要	Net primary production in boreal coniferous forests is generally severely limited by N deficiency. Nitrogen fertilization has thus the potential to strongly increase forest tree biomass production in the boreal region and consequently increase the biosphere uptake of atmospheric CO2. Increased N availability may though increase the production and emission of soil N2O, counteracting the climate mitigation potential from increased forest biomass production. Studies in the boreal region on the net effect on the climate mitigation potential from N fertilization are scarcer than in other biomes. Therefore, we explored how N affected soil GHG fluxes in two boreal field N-loading experiments, of which one is a long-term experiment (40 years), and the other established 6 years before investigation. We also estimated whether the increased soil N2O emission could offset the N-driven increased C sequestration by the trees. Nitrogen additions affected the soil GHG fluxes in both stands. Soil N2O emission was enhanced by N addition at every fertilization rate, though marginally compared to the reduced soil CO2 emission and the increased atmospheric CO2 uptake and biomass production. The estimated annual uptake of CH4 by soil under long-term N addition increased. The magnitude of soil CH4 uptake was on the same order of magnitude as the increase in soil N2O emissions caused by N addition, when compared as CO2 equivalents. In conclusion, forest N fertilization in boreal areas increased the GHG net uptake and, thus, provides a means to mitigate increasing atmospheric concentrations of GHG.
英文关键词	Climate change; Climate mitigation; GHG fluxes; Global warming; Tree biomass
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:001186732200001
来源期刊	FOREST ECOLOGY AND MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300434
作者单位	Swedish University of Agricultural Sciences; McGill University; Free University of Bozen-Bolzano; University of Trento; University of Molise
推荐引用方式 GB/T 7714	Oquist, Mats G.,He, Hongxing,Bortolazzi, Anna,et al. Nitrogen fertilization increases N2O emission but does not offset the reduced radiative forcing caused by the increased carbon uptake in boreal forests[J],2024,556.
APA	Oquist, Mats G..,He, Hongxing.,Bortolazzi, Anna.,Nilsson, Mats B..,Rodeghiero, Mirco.,...&Egnell, Gustaf.(2024).Nitrogen fertilization increases N2O emission but does not offset the reduced radiative forcing caused by the increased carbon uptake in boreal forests.FOREST ECOLOGY AND MANAGEMENT,556.
MLA	Oquist, Mats G.,et al."Nitrogen fertilization increases N2O emission but does not offset the reduced radiative forcing caused by the increased carbon uptake in boreal forests".FOREST ECOLOGY AND MANAGEMENT 556(2024).