气候变化领域集成服务门户(CCPortal): Tea-planted soils as global hotspots for N2O emissions from croplands

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DOI	10.1088/1748-9326/aba5b2
	Tea-planted soils as global hotspots for N2O emissions from croplands
	Wang Y.; Yao Z.; Pan Z.; Wang R.; Yan G.; Liu C.; Su Y.; Zheng X.; Butterbach-Bahl K.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	Tea-planted soils generally receiving high nitrogen (N) fertilizer doses are more vulnerable to acidification, and turn into significant sources of the potent greenhouse gas nitrous oxide (N2O). However, little is known about the magnitude of soil N2O emissions from global tea plantations. Based on a global meta-analysis of field experimental data collected from major tea growing countries, we quantify annual N2O emissions, calculate direct emission factors (EFd) and identify key environmental controls of emissions from tea plantations. However, most data are from China and Japan, which is to be expected given that tea plantations in these countries represent >60% of the global area and the vital environmental research community in both countries. Results suggest that annual N2O emissions from soils of global tea plantations are on average 17.1 kg N ha−1 (or 8008 kg CO2-eq ha−1), being substantially greater than those reported for cereal croplands (662–3757 kg CO2-eq ha−1). The global mean EFd for N applications to tea plantations equals 2.31% (with a 95% confidence interval of 1.91%–2.71%), being two times higher than the Intergovernmental Panel on Climate Change default value of 1%. Across tea plantations worldwide, total N2O emissions are estimated to be 57–84 Gg N yr−1, or 1.5%–12.7% of total direct cropland N2O emissions. Given that tea plantations account for only 0.3% of total cropland area, our finding highlights that tea-planted soils are global hotspots for N2O emissions and that these systems might be prime targets for climate change mitigation in the agricultural sector. Considering that tea is a high price commodity for which consumers may be willing to apply pressure for more climate-smart production, possible mitigation efforts include use of controlled-release fertilizers or nitrification inhibitors, and application of biochar and/or lime for increasing soil pH; i.e. measures that increase N use efficiency while reducing the climate footprint of tea production. © 2020 The Author(s). Published by IOP Publishing Ltd
英文关键词	Acidic soil; Emission factor; Fertilized cropland; Nitrous oxide; Tea
语种	英语
scopus关键词	Agricultural robots; Carbon dioxide; Greenhouse gases; Lime; Nitrogen fertilizers; Nitrogen oxides; Soils; Tea; Agricultural sector; Climate change mitigation; Confidence interval; Controlled-release fertilizers; Environmental control; Environmental researches; Intergovernmental panel on climate changes; Nitrification inhibitor; Climate change; agricultural land; climate change; confidence interval; environmental research; Intergovernmental Panel on Climate Change; mitigation; nitrate; plantation; soil-vegetation interaction; tea; China; Japan
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153641
作者单位	State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, School of Environment, Henan Normal University, Xinxiang, 453007, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049, China; Institute for Meteorology and Climate Research, Atmospheric Environmental Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, D-82467, Germany
推荐引用方式 GB/T 7714	Wang Y.,Yao Z.,Pan Z.,et al. Tea-planted soils as global hotspots for N2O emissions from croplands[J],2020,15(10).
APA	Wang Y..,Yao Z..,Pan Z..,Wang R..,Yan G..,...&Butterbach-Bahl K..(2020).Tea-planted soils as global hotspots for N2O emissions from croplands.Environmental Research Letters,15(10).
MLA	Wang Y.,et al."Tea-planted soils as global hotspots for N2O emissions from croplands".Environmental Research Letters 15.10(2020).