Understanding the impact of nonconventional ingredients in swine diets on the environment is important; specifically how they may alter manure output and GHG emissions. Increasing dietary fibre may increase hindgut fermentation and the production of GHG emissions, but might not affect performance of the pigs when a multi-carbohydrase enzyme is supplemented.
This study focused on how to reduce the GHG emissions by grow-finish pigs without negatively impacting efficiency or productivity through the feeding of wheat millrun with or without a multi-carbohydrase enzyme. Results showed that up to 30% inclusion of wheat millrun reduced both nutrient digestibility and growth performance. However, days to market was not affected by having 30% wheat millrun inclusions in the diets. Backfat depth had a decrease and carcass yield increased with wheat millrun inclusion. There were no interactions found between wheat millrun inclusion and multi-carbohydrase supplementation on nutrient digestibility, growth performance and carcass quality characteristics. The 30% inclusion of wheat millrun in swine diets did not affect GHG emissions from swine barns. Even though wheat millrun inclusion increases the fibre content in swine diets, addition of up to 30% of wheat millrun will not significantly increase the GHG produced by the pigs in swine barns.
Impacting greenhouse gas emissions through diet change (full article)
