气候变化领域集成服务门户(CCPortal): High organic carbon content constricts the potential for stable organic carbon accrual in mineral agricultural soils in Finland

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DOI	10.1016/j.jenvman.2023.119945
	High organic carbon content constricts the potential for stable organic carbon accrual in mineral agricultural soils in Finland
	Soinne, Helena; Hyyrynen, Matti; Jokube, Medile; Keskinen, Riikka; Hyvaluoma, Jari; Pihlainen, Sampo; Hyytiainen, Kari; Miettinen, Arttu; Rasa, Kimmo; Lemola, Riitta; Virtanen, Eetu; Heinonsalo, Jussi; Heikkinen, Jaakko
发表日期	2024
ISSN	0301-4797
EISSN	1095-8630
起始页码	352
卷号	352
英文摘要	Sequestering carbon into agricultural soils is considered as a means of mitigating climate change. We used agronomic soil test results representing c. 95% of the farmed land area in Finland to estimate the potential of the uppermost 15 cm soil layer of mineral agricultural soils to sequester organic carbon (OC) and to contribute to the mitigation of climate change. The estimation of the maximum capacity of mineral matter to protect OC in stable mineral -associated form was based on the theory that clay and fine -sized (fines = clay + silt) particles have a limited capacity to protect OC. In addition, we used the clay/OC and fines/OC ratios to identify areas with a risk of erosion and reduced productivity, thus indicating priority areas potentially benefitting from the increased soil OC contents. We found that 32-40% of the mineral agricultural soils in Finland have the potential to further accumulate mineral -associated OC (MOC), while in the majority of soils, the current OC stock in the uppermost 15 cm exceeded the capacity of mineral matter to protect OC. The nationwide soil OC sequestration potential of the uppermost 15 cm in mineral agricultural soils ranged between 0.21 and 0.26 Tg, which corresponds to less than 2% of annual greenhouse gas emissions in Finland. The fields with the highest potential for SOC accrual were found in the southern and southwestern parts of the country, including some of the most intensively cultivated high -clay soils. Although the nationwide potential for additional OC sequestration was estimated to be relatively small, the current OC storage in Finnish arable mineral soils (0-15 cm) is large, 128 Tg. Farming practices enabling maximum OC input into the soil play an important role as a tool for mitigating the loss of carbon from high-OC soils in the changing climate. Furthermore, especially in high -clay areas with potential for MOC accrual, efforts to increase soil OC could help improve soil structural stability and therefore reduce erosion and the loss of nutrients to the aquatic environments.
英文关键词	Mineral -associated organic carbon; Particulate organic carbon; Carbon sequestration; Carbon sink; Clay/OC ratio
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001164027000001
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/291634
作者单位	Natural Resources Institute Finland (Luke); University of Helsinki; Natural Resources Institute Finland (Luke); Hame University of Applied Sciences; Finnish Environment Institute; University of Helsinki
推荐引用方式 GB/T 7714	Soinne, Helena,Hyyrynen, Matti,Jokube, Medile,et al. High organic carbon content constricts the potential for stable organic carbon accrual in mineral agricultural soils in Finland[J],2024,352.
APA	Soinne, Helena.,Hyyrynen, Matti.,Jokube, Medile.,Keskinen, Riikka.,Hyvaluoma, Jari.,...&Heikkinen, Jaakko.(2024).High organic carbon content constricts the potential for stable organic carbon accrual in mineral agricultural soils in Finland.JOURNAL OF ENVIRONMENTAL MANAGEMENT,352.
MLA	Soinne, Helena,et al."High organic carbon content constricts the potential for stable organic carbon accrual in mineral agricultural soils in Finland".JOURNAL OF ENVIRONMENTAL MANAGEMENT 352(2024).