Counterfactual scenarios reveal historical impact of cropland management on soil organic carbon stocks in the United States.

Autor: Ogle SM; Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO, 80523, USA. Stephen.Ogle@colostate.edu.; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, USA. Stephen.Ogle@colostate.edu., Breidt FJ; Department of Statistics, Colorado State University, Fort Collins, CO, 80253, USA.; Department of Statistics and Data Science, NORC at the University of Chicago, 55 East Monroe Street, Chicago, IL, 60603, USA., Del Grosso S; USDA-Agricultural Research Service, SMSBRU, Fort Collins, CO, 80256, USA., Gurung R; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, USA., Marx E; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, USA., Spencer S; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, USA., Williams S; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, USA., Manning D; Department of Agricultural and Resource Economics, Colorado State University, Fort Collins, CO, 80253, USA.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Sep 04; Vol. 13 (1), pp. 14564. Date of Electronic Publication: 2023 Sep 04.
DOI: 10.1038/s41598-023-41307-x
Abstrakt: Natural climate solutions provide opportunities to reduce greenhouse gas emissions and the United States is among a growing number of countries promoting storage of carbon in agricultural soils as part of the climate solution. Historical patterns of soil organic carbon (SOC) stock changes provide context about mitigation potential. Therefore, our objective was to quantify the influence of climate-smart soil practices on SOC stock changes in the top 30 cm of mineral soils for croplands in the United States using the DayCent Ecosystem Model. We estimated that SOC stocks increased annually in US croplands from 1995 to 2015, with the largest increase in 1996 of 16.6 Mt C (95% confidence interval ranging from 6.1 to 28.2 Mt CO 2  eq.) and the lowest increase in 2015 of 10.6 Mt C (95% confidence interval ranging from - 1.8 to 22.2 Mt C). Most climate-smart soil practices contributed to increases in SOC stocks except for winter cover crops, which had a negligible impact due to a relatively small area with cover crop adoption. Our study suggests that there is potential for enhancing C sinks in cropland soils of the United States although some of the potential has been realized due to past adoption of climate-smart soil practices.
(© 2023. Springer Nature Limited.)
Databáze: MEDLINE
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