The environmental impacts of the production of concentrated feed: the case of pig feed in Bretagne

摘要: Pig production systems often depend to a large extent on concentrated feed imported from outside the farm. This study used Life Cycle Assessment (LCA) method assess major environmental impacts associated with and on-farm delivery of for pigs. Feed composition was based average data Bretagne (France) in 1998 published wheat-based, maize-based co-product feeds. As crop practices are similar those most western Europe, we conclude that results this apply more largely Europe. Depending fertilisation practise crop-based ingredients, one kg finishing pigs will produce eutrophication potential between 3.8 9.3 g PO4-equivalents, global warming 472 792 CO2-equivalents, an acidification 3.0 6.3 SO2-equivalents, terrestrial ecotoxicity 0.4 8.7 1,4-dichlorobenzene-equivalents, energy use 3.3 6.1 MJ, land 1.44 2.07 m2 year. These mainly due ingredients. The contribution transport processes substantial climate change, use. A containing co-products had higher lower than feeds consisting non-processed Hypotheses respect feed's main ingredients have effect its impact values. uncertainty concerning emissions N2O, NH3, NO3 very eutrophication. burdens pig can be decreased by: optimising using locally produced reducing concentrations Cu Zn feed, wheat-based rather