Soil organic carbon storage, nitrous oxide emission and net climate benefit of conservation agriculture: Insights from two long-term experiments in Zimbabwe

Shumba Armwell, Chikowo Régis, Thierfelder Christian, Corbeels Marc, Six Johan, Cardinael Rémi. 2024. Soil organic carbon storage, nitrous oxide emission and net climate benefit of conservation agriculture: Insights from two long-term experiments in Zimbabwe. Growing Africa, 3 (1) : 21-26.

https://doi.org/10.55693/ga31.IMVF9429

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Résumé : The slow increase in grain production in sub-Saharan Africa (SSA) is largely the result of cropland expansion rather than an increase in crop yields, which have been stagnantly low (< 1.5 t ha-1). Sustainable intensification of crop production is therefore needed to feed a growing population whilst minimizing negative impacts on the environment, biodiversity, and climate. Full accounting of the net global warming potential (GWP) of management practices can provide a holistic approach for identifying cropping systems that promote sustainable agriculture intensification to ensure food security whilst mitigating climate change.

Mots-clés Agrovoc : agriculture de conservation, séquestration du carbone, atténuation des effets du changement climatique, changement climatique, système de culture, réchauffement global, oxyde nitreux, rendement des cultures, conservation des sols, intensification, carbone organique du sol, augmentation de rendement, diversification, émission de gaz, émissions de gaz à effet de serre