Assessing “4 per 1000” soil organic carbon storage rates under Mediterranean climate: a comprehensive data analysis

Rosa Francaviglia (), Claudia Di Bene, Roberta Farina, Luca Salvati and José Luis Vicente-Vicente
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Rosa Francaviglia: Research Centre for Agriculture and Environment (CREA-AA)
Claudia Di Bene: Research Centre for Agriculture and Environment (CREA-AA)
Roberta Farina: Research Centre for Agriculture and Environment (CREA-AA)
Luca Salvati: Research Centre for Forestry and Wood (CREA-FL)
José Luis Vicente-Vicente: Mercator Research Institute on Global Commons and Climate Change (MCC)

Mitigation and Adaptation Strategies for Global Change, 2019, vol. 24, issue 5, No 6, 795-818

Abstract: Abstract Soil Organic Carbon (SOC) is considered a proxy of soil health, contributing to food production, mitigation, and adaptation to climate change and other ecosystem services. Implementing Recommended Management Practices (RMPs) may increase SOC stocks, contributing to achieve the United Nations Framework Convention on Climate Change 21st Conference of the Parties agreements reached in Paris, France. In this framework, the “4 per 1000” initiative invites partners implementing practical actions to reach a SOC stock annual growth of 4‰. For the first time, we assessed the achievement of 4‰ objective in Mediterranean agricultural soils, aiming at (i) analyzing a representative data collection assessing edaphoclimatic variables and SOC stocks from field experiments under different managements in arable and woody crops, (ii) providing evidence on SOC storage potential, (iii) identifying the biophysical and management variables associated with SOC storage, and (iv) recommending a set of mitigation strategies for global change. Average storage rates amounted to 15 and 80 Mg C ha−1 year−1 × 1000 in arable and woody crops, respectively. Results show that application of organic amendments led to significantly higher SOC storage rates than conventional management, with average values about 1.5 times higher in woody than in arable crops (93 vs. 63 Mg C ha−1 year−1 × 1000). Results were influenced by the initial SOC content, experiment duration, soil texture, and climate regime. The relatively lower levels of SOC in Mediterranean soils, and the high surface covered by woody crops, may reflect the high potential of these regions to achieving significant increases in SOC storage at the global scale.

Keywords: 4 per 1000 initiative; Carbon sequestration; Carbon storage; Climate change mitigation; Cropping systems; Mediterranean climate (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1007/s11027-018-9832-x

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