Perennial alley cropping contributes to decrease soil CO2 and N2O emissions and increase soil carbon sequestration in a Mediterranean almond orchard
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AuthorSánchez Navarro, Virgina; Shahrokh, Vajihe; Martínez Martínez, Silvia; Acosta Avilés, José Alberto; Almagro Bonmatí, María; [et al.]
Knowledge AreaEdafología y Química Agrícola
SponsorsThis work was supported by the European Commission Horizon 2020 project Diverfarming [grant agreement 728003].
Realizado en/conUniversidad Politécnica de Cartagena
Bibliographic CitationVirginia Sánchez-Navarro, Vajihe Shahrokh, Silvia Martínez-Martínez, Jose A. Acosta, María Almagro, María Martínez-Mena, Carolina Boix-Fayos, Elvira Díaz-Pereira, Raúl Zornoza, Perennial alley cropping contributes to decrease soil CO2 and N2O emissions and increase soil carbon sequestration in a Mediterranean almond orchard, Science of The Total Environment, Volume 845, 2022, 157225, ISSN 0048-9697, https://doi.org/10.1016/j.scitotenv.2022.157225.
Soil carbon sequestration
The implementation of alley cropping in orchards can be a sustainable strategy to increase farm productivity by crop diversification and contribute to climate change mitigation. In this research, we evaluated the short-term effect of alley cropping with reduced tillage on soil CO2 and N2O emissions and soil total organic carbon (TOC) in an almond orchard under Mediterranean rainfed conditions. We compared an almond monoculture with tillage in all plot surface (MC) with almond crop with reduced tillage and growth of Capparis spinosa (D1) and almond crop with reduced tillage and growth of Thymus hyemalis (D2). For two years, soil CO2 and N2O were measured, with soil sampling at the start and end of the experimental period. Results showed that CO2 emission rates followed the soil temperature pattern, while N2O emissions were not correlated with temperature nor moisture. Soil CO2 emissions were significantly higher in MC (87 mg m−2 h−1), with no significant differences between D1 and D2 (69 ...
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