Evaluation and association of laying hen performance, environmental conditions and gas concentrations in barn housing system

Abstract

Various environmental, constructional, and human-related factors affect overall eggs production. The egg poultry production has been analysed in barn housing system depending on birds' life cycle time and environmental conditions (carbon dioxide concentration, outdoor and indoor temperature, indoor relative humidity). Within the present research study, the data provided by the Baltic poultry industry company has been analysed. Outside temperature, environmental conditions, carbon dioxide (CO2) and ammonia (NH3) concentrations were continuously monitored in two-storey tunnel-ventilated layer house from January to June 2021. CO2 and NH3 gas concentrations were higher during the winter (p