气候变化领域集成服务门户(CCPortal): Grain legume-based cropping systems can mitigate greenhouse gas emissions from cereal under Mediterranean conditions

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DOI	10.1016/j.agee.2021.107406
	Grain legume-based cropping systems can mitigate greenhouse gas emissions from cereal under Mediterranean conditions
	Oliveira M.; Castro C.; Coutinho J.; Trindade H.
发表日期	2021
ISSN	1678809
卷号	313
英文摘要	Legume-based cropping systems have been promoted as a sustainable alternative to fertilizer-based systems. However, the efficacy of this strategy for mitigating greenhouse gas (GHG) emissions in Mediterranean agroecosystems is still not well known. We conducted two field trials in Mediterranean conditions aiming to compare the soil nitrous oxide (N2O) and methane (CH4) emissions under rainfed triticale (× Triticosecale) monocropped with and without N fertilizer, or in rotation with rainfed faba bean (Vicia faba), rainfed pea (Pisum sativum), or summer-irrigated cowpea (Vigna unguiculata). The effect of incorporation vs. removal of the legume residues was also evaluated. Soil mineral N, moisture contents and GHG fluxes were measured throughout two consecutive years. Legume-based cultivation reduced triticale yield-scaled N2O emissions (YSNE) in a wet year but maintained or even increased YSNE in a dry year. This was mostly due to low N use efficiency (NUE) in the fertilizer-based systems and to favorable conditions for denitrification when rainfall was high. Significant differences in CH4 exchange between systems were only observed in the cowpea-triticale rotation with incorporated residues, which mitigated triticale CH4 emissions in the dry year, possibly due to improved soil aeration and reduced water stress to methanotrophs. We conclude that legume-based farming can be an effective GHG mitigation strategy in Mediterranean agroecosystems, but efficient supplementary N fertilization may be necessary to achieve a reduction in GHG emissions without compromising crop yields. © 2021 Elsevier B.V.
英文关键词	Crop rotation; Legume; Methane; Nitrous oxide; Residue management; Yield-scaled emissions
scopus关键词	cereal; cropping practice; cultivation; denitrification; greenhouse gas; legume; Mediterranean environment; methane; nitrous oxide; Fabaceae; Pisum sativum; Triticosecale; Vicia faba; Vigna unguiculata
来源期刊	Agriculture, Ecosystems and Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177179
作者单位	Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB-UTAD), Quinta de Prados, Vila Real, 5001-801, Portugal; Department of Agronomy, Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados, Vila Real, 5001-801, Portugal; Chemistry Centre, Department of Soil Science, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, Vila Real, 5001-801, Portugal
推荐引用方式 GB/T 7714	Oliveira M.,Castro C.,Coutinho J.,et al. Grain legume-based cropping systems can mitigate greenhouse gas emissions from cereal under Mediterranean conditions[J],2021,313.
APA	Oliveira M.,Castro C.,Coutinho J.,&Trindade H..(2021).Grain legume-based cropping systems can mitigate greenhouse gas emissions from cereal under Mediterranean conditions.Agriculture, Ecosystems and Environment,313.
MLA	Oliveira M.,et al."Grain legume-based cropping systems can mitigate greenhouse gas emissions from cereal under Mediterranean conditions".Agriculture, Ecosystems and Environment 313(2021).