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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, Klaus

Abstract:
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 (N$_{2}$O). However, little is known about the magnitude of soil N$_{2}$O emissions from global tea plantations. Based on a global meta-analysis of field experimental data collected from major tea growing countries, we quantify annual N$_{2}$O 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 N$_{2}$O 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 CO$_{2}$-eq ha$^{−1}$). The global mean EF$_{d}$ 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%. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000125668
Veröffentlicht am 05.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1748-9318, 1748-9326
KITopen-ID: 1000125668
Erschienen in Environmental research letters
Band 15
Heft 10
Seiten Art.-Nr.: 104018
Schlagwörter tea, nitrous oxide, acidic soil, emission factor, fertilized cropland
Nachgewiesen in Scopus
Web of Science
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