Ammonia, methane and carbon dioxide emissions from laying hens kept in battery cages and aviary systems
2001
Hoernig, G. | Brunsch, R. | Stollberg, U. (Institute of Agricultural Engineering Bornim, Potsdam (Germany)) | Jelinek, A. | Pliva, P. | Cespiva, M.
Investigations of gaseous emissions were carried out in two Czech farms with hens in battery cages (farms A, about 21,000-23,000 hens per farm) and in two German farms with hens in aviaries (farms B, about 10,000 hens per farm). The stables in both farms were equipped with forced ventilation and manure drying system. The CO2 concentration with a maximum of 4,370 mg/cubic m (farms A) and a maximum of 2,570 mg/cubic m (farms B) was far below the DIN Standard 18910. Ammonia concentrations in both types of farms were below the recommended level. The low concentrations of NH3 (from 0.8 to 2.0 mg/cubic m) in the farms A reflected the efficiency of the manure drying process.
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