气候变化领域集成服务门户(CCPortal): Soil organic carbon stocks potentially at risk of decline with organic farming expansion

CCPortal

DOI	10.1038/s41558-023-01721-5
	Soil organic carbon stocks potentially at risk of decline with organic farming expansion
	Gaudare, Ulysse; Kuhnert, Matthias; Smith, Pete; Martin, Manuel; Barbieri, Pietro; Pellerin, Sylvain; Nesme, Thomas
发表日期	2023
ISSN	1758-678X
EISSN	1758-6798
英文摘要	The authors simulated the impact of organic farming expansion on soil organic carbon. They found that soil organic carbon stock may be at risk of decline if the complete conversion to organic farming does not involve additional practices such as widespread cover cropping and residue recycling. Organic farming is often considered a strategy that increases croplands' soil organic carbon (SOC) stock. However, organic farms currently occupy only a small fraction of cropland, and it is unclear how the full-scale expansion of organic farming will impact soil carbon inputs and SOC stocks. Here we use a spatially explicit biogeochemical model to show that the complete conversion of global cropland to organic farming without the use of cover crops and plant residue (normative scenario) will result in a 40% reduction of global soil carbon input and 9% decline in SOC stock. An optimal organic scenario that supports widespread cover cropping and enhanced residue recycling will reduce global soil carbon input by 31%, and SOC can be preserved after 20 yr following conversion to organic farming. These results suggest that expanding organic farming might reduce the potential for soil carbon sequestration unless appropriate farming practices are implemented.
英文关键词	CLIMATE-CHANGE; NITROGEN; SEQUESTRATION; AGGREGATION; IMPACTS
WOS研究方向	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001022085200001
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282545
作者单位	INRAE; University of Aberdeen; INRAE
推荐引用方式 GB/T 7714	Gaudare, Ulysse,Kuhnert, Matthias,Smith, Pete,et al. Soil organic carbon stocks potentially at risk of decline with organic farming expansion[J],2023.
APA	Gaudare, Ulysse.,Kuhnert, Matthias.,Smith, Pete.,Martin, Manuel.,Barbieri, Pietro.,...&Nesme, Thomas.(2023).Soil organic carbon stocks potentially at risk of decline with organic farming expansion.Nature Climate Change.
MLA	Gaudare, Ulysse,et al."Soil organic carbon stocks potentially at risk of decline with organic farming expansion".Nature Climate Change (2023).