Cage-free egg production, more cost than benefits?

摘要

New Coalition for a Sustainable Egg Supply research looks at air quality, food safety, egg quality, production costs and pullet bone growth in the three housing systems.The Coalition for a Sustainable Egg Supply conducted field research on a commercial egg farm comparing three housing systems: conventional cages, enriched cages and cage-free aviary. Environmental impact, food safety, bird performance, production costs, worker safety, and animal health and well-being measurements were made for 27 months, which encompassed two single-cycle flocks. Nine papers were published in the March 2015 issue of the journal Poultry Science detailing results from research conducted on indoor air quality, food safety, egg quality, production cost and bone growth.