Feed management in ruminant production systems strongly affects agricultural greenhouse gas (GHG) emissions. Scientists from the LRG’s Feed and Nutrition Network (FNN) are working together on a major project, ‘Capturing Effects of Diet on Emissions from Ruminant Systems’, to address these issues and build on the findings of the related FNN Global Network project. Known as ‘CEDERS’, this new project aims to:

  • Develop databases to evaluate dietary mitigation strategies (including digestion and excretion) and GHG emissions
  • Undertake experiments to fill high-priority knowledge gaps on dietary effects on ruminant manure emissions
  • Evaluate consequences of dietary mitigation measures on emissions on selected farm cases with a modelling platform
  • Improve farm accounting and national inventory methodologies to capture effects of dietary mitigation measures
  • Disseminate the implications of findings to end-users of GHG accounting and inventory

CEDERS currently involves European and New Zealand scientists. With funding from New Zealand, the project is being expanded under the GRA’s Enteric Fermentation Flagship to include data from Latin America and potentially South East Asia. This additional work will help:

  1. Identify region-specific feeds that could feasibly offer the most significant emissions reductions
  2. Develop Ym values for specific feeds suitable for inclusion in advanced national GHG inventories to help better quantify enteric methane emissions and, specifically, capture the impact of local diets and changes in diets on emissions