气候变化领域集成服务门户(CCPortal): Nitrous oxide emissions in proportion to nitrification in moist temperate forests

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DOI	10.1007/s10533-020-00655-w
	Nitrous oxide emissions in proportion to nitrification in moist temperate forests
	Fan S.; Yoh M.
发表日期	2020
ISSN	0168-2563
起始页码	223
结束页码	236
卷号	148 期号:3
英文摘要	Chronic elevated nitrogen deposition has increased nitrogen availability in many forest ecosystems globally, and this phenomenon has been suggested to increase soil nitrification. Although it is believed that increased nitrogen availability would also increase nitrous oxide (N2O) emissions from forest ecosystems, its impact on N2O flux is poorly known. In this study, 3-years monitoring of N2O emissions was performed in a forested watershed receiving elevated nitrogen deposition and located in the suburbs of Tokyo, Japan. In addition, a comparative field survey was carried out in nine temperate forest sites with varying nitrogen availabilities. In the intensively studied forest site showing typical nitrogen saturation, the average annual N2O emissions from the whole watershed were estimated to be 0.88 kg N ha−1 year−1, comparable to the highest observed levels for temperate forests except for some very high emission sites in Europe. Although no correlation was found for humid spots with WFPS > 60%, a clear positive correlation was noted between N2O flux and net nitrification rate in situ for plots with water-filled pore space (WFPS) < 60%. The N2O flux varied across nine forest sites almost in proportional to the stream water NO3 − concentration in the watershed that ranged from 0.14 to 1.64 mg N/L. We conclude that N2O emissions are related to nitrification in moist temperate forest, which may be associated with the magnitude of nitrogen saturation. © 2020, The Author(s).
英文关键词	Nitrification; Nitrogen availability; Nitrogen saturation; Nitrous oxide; Temperate forest
语种	英语
scopus关键词	ecosystem dynamics; emission; forest ecosystem; nitrification; nitrous oxide; temperate forest
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153154
作者单位	United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan; Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
推荐引用方式 GB/T 7714	Fan S.,Yoh M.. Nitrous oxide emissions in proportion to nitrification in moist temperate forests[J],2020,148(3).
APA	Fan S.,&Yoh M..(2020).Nitrous oxide emissions in proportion to nitrification in moist temperate forests.Biogeochemistry,148(3).
MLA	Fan S.,et al."Nitrous oxide emissions in proportion to nitrification in moist temperate forests".Biogeochemistry 148.3(2020).