The cost of mitigating greenhouse gas emissions in farms in Central Andes of Ecuador

Aim of study: Reduction of the greenhouse gas ( GHG) emissions derived from food production is imperative to meet climate change mitigation targets. Sustainable mitigation strategies also combine improvements in soil fertility and structure, nutrient recycling, and the use more efficient use of water. Many of these strategies are based on agricultural know- how, with proven benefits for farmers and the environment. This paper considers measures that could contribute to emissions reduction in subsistence farming systems and evaluation of management alternatives in the Central Andes of Ecuador. We focused on potato and milk production because they represent two primary employment and income sources in the region's rural areas and are staple foods in Latin America. Area of study: Central Andes of Ecuador: Carchi, Chimborazo, Canar provinces Material and methods: Our approach to explore the cost and the effectiveness of mitigation measures combines optimisation models with participatory methods. Main results: Results show the difference of mitigation costs between regions which should be taken into account when designing of any potential support given to farmers. They also show that there is a big mitigation potential from applying the studied measures which also lead to increased soil fertility and soil structure improvements due to the increased soil organic carbon. Research highlights: This study shows that marginal abatement cost curves derived for different agro-climatic regions are helpful tools for the development of realistic regional mitigation options for the agricultural sector.