Ilkka Leinonen1, Adrian G Williams2. 1. School of Agriculture, Food and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, UK. 2. School of Energy, Environment and Agri-Food, Cranfield University, Bedford MK43 0AL, UK.
Abstract
BACKGROUND: The aim of the study was to quantify the effects of the use of a protease Ronozyme® ProAct in broiler feed on the environmental impacts of broiler and broiler feed production chains. This was done by using a Life Cycle Assessment (LCA) modelling approach with data from trials using both standard soya-based broiler diets and reduced-protein diets with added protease. RESULTS: The results for the feed production chain showed that there was a reduction in all environmental impact categories when protease was used in the diets. The biggest reduction occurred in the category of Global Warming Potential, mainly as a result of decreased carbon dioxide emissions from land use changes related to soya production. In the results for the broiler production chain, there were relatively bigger reductions in Eutrophication Potential and especially in Acidification Potential, mainly as a result of reduced feed protein content and subsequent nitrogen emissions from housing and manure management. CONCLUSION: The use of protease in the broiler diets reduced the environmental impacts of both feed production and broiler production. The latter is mainly through reduced ammonia emissions, which has substantial benefit per se in the poultry industry.
BACKGROUND: The aim of the study was to quantify the effects of the use of a protease Ronozyme® ProAct in broiler feed on the environmental impacts of broiler and broiler feed production chains. This was done by using a Life Cycle Assessment (LCA) modelling approach with data from trials using both standard soya-based broiler diets and reduced-protein diets with added protease. RESULTS: The results for the feed production chain showed that there was a reduction in all environmental impact categories when protease was used in the diets. The biggest reduction occurred in the category of Global Warming Potential, mainly as a result of decreased carbon dioxide emissions from land use changes related to soya production. In the results for the broiler production chain, there were relatively bigger reductions in Eutrophication Potential and especially in Acidification Potential, mainly as a result of reduced feed protein content and subsequent nitrogen emissions from housing and manure management. CONCLUSION: The use of protease in the broiler diets reduced the environmental impacts of both feed production and broiler production. The latter is mainly through reduced ammonia emissions, which has substantial benefit per se in the poultry industry.
Authors: Hyun Min Cho; Jun Sun Hong; Yu Bin Kim; Shan Randima Nawarathne; Inchul Choi; Young-Joo Yi; Di Wu; Hans Lee; Seung Eun Han; Ki Taeg Nam; Eun Il Seoung; Jung Min Heo Journal: J Anim Sci Technol Date: 2020-11-30
Authors: Q D Wang; S Li; K Y Zhang; Y Zhang; S P Bai; X M Ding; J P Wang; H W Peng; G Tian; Y Xuan; Z W Su; Q F Zeng Journal: Poult Sci Date: 2020-10-12 Impact factor: 3.352