气候变化领域集成服务门户(CCPortal): Revised emission factors for estimating direct nitrous oxide emissions from nitrogen inputs in Australia's agricultural production systems: a meta-analysis

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DOI	10.1071/SR23070
	Revised emission factors for estimating direct nitrous oxide emissions from nitrogen inputs in Australia's agricultural production systems: a meta-analysis
	Grace, Peter; De Rosa, Daniele; Shcherbak, Iurii; Strazzabosco, Alice; Rowlings, David; Scheer, Clemens; Barton, Louise; Wang, Weijin; Schwenke, Graeme; Armstrong, Roger; Porter, Ian; Bell, Michael
发表日期	2024
ISSN	1838-675X
EISSN	1838-6768
起始页码	62
结束页码	1
卷号	62 期号:1
英文摘要	Context Agricultural soils are a major source of emissions of the greenhouse gas nitrous oxide (N2O).Aim Quantify direct N2O emissions from Australian agricultural production systems receiving nitrogen (N) inputs from synthetic and organic fertilisers, crop residues, urine and dung.Method A meta-analysis of N2O emissions from Australian agriculture (2003-2021) identified 394 valid emission factors (EFs), including 102 EFs with enhanced efficiency fertilisers (EEFs).Key results The average EF from all N sources (excluding EEFs) was 0.57%. Industry-based EFs for synthetic N fertiliser (excluding EEFs) ranged from 0.17% (non-irrigated pasture) to 1.77% (sugar cane), with an average Australia-wide EF of 0.70%. Emission factors were independent of topsoil organic carbon content, bulk density and pH. The revised EF for the non-irrigated cropping (grains) industry is now 0.41%; however, geographically-defined EFs are recommended. Urea was the most common N source with an average EF of 0.72% compared to urine (0.20%), dung (0.06%) and organo-mineral mixtures (0.26%). The EF for synthetic N fertilisers in rainfed environments increased by 0.16% for every 100 mm over 300 mm mean annual rainfall. For each additional 50 kg N ha-1 of synthetic fertiliser, EFs increased by 0.13%, 0.31% and 0.38% for the horticulture, irrigated and high rainfall non-irrigated cropping industries, respectively. The use of 3,4 dimethylpyrazole-phosphate (DMPP) produced significant reductions in EFs of 55%, 80% and 84% for the horticulture, non-irrigated and irrigated cropping industries, respectively.Conclusions and implications Incorporation of the revised EFs into the 2020 National Greenhouse Accounts (NGA) produced a 12% increase in direct N2O emissions from the application of synthetic N fertilisers. The lack of country-specific crop residue decomposition data is a major deficiency in the NGA. Greenhouse gas emissions from agriculture contribute 15% of the official national account. Nitrous oxide is a major greenhouse gas and is primarily emitted from soils. With a Global Warming Potential nearly 300 times that of carbon dioxide, it has major impact on climate change. Nitrogen applications in the form of fertilisers, crop residues, urine and dung are the primary contributors to these emissions. The study assembled nitrous oxide emissions data from Australian agriculture that has been collected over the past 2 decades to provide accurate emission factors for the national account.
英文关键词	DMPP; emission factors; inventory; meta-analysis; nitrification inhibitors; nitrogen fertiliser; nitrous oxide
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:001150813100011
来源期刊	SOIL RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306081
作者单位	Queensland University of Technology (QUT); European Commission Joint Research Centre; EC JRC ISPRA Site; University of Western Australia; NSW Department of Primary Industries; La Trobe University; University of Queensland
推荐引用方式 GB/T 7714	Grace, Peter,De Rosa, Daniele,Shcherbak, Iurii,et al. Revised emission factors for estimating direct nitrous oxide emissions from nitrogen inputs in Australia's agricultural production systems: a meta-analysis[J],2024,62(1).
APA	Grace, Peter.,De Rosa, Daniele.,Shcherbak, Iurii.,Strazzabosco, Alice.,Rowlings, David.,...&Bell, Michael.(2024).Revised emission factors for estimating direct nitrous oxide emissions from nitrogen inputs in Australia's agricultural production systems: a meta-analysis.SOIL RESEARCH,62(1).
MLA	Grace, Peter,et al."Revised emission factors for estimating direct nitrous oxide emissions from nitrogen inputs in Australia's agricultural production systems: a meta-analysis".SOIL RESEARCH 62.1(2024).