The impact of layer housing technology on commercial egg production.

In this thesis the selected enterprise indicators of laying were analyzed in terms of the impact of a hen housing system. For commercial egg production in the enterprise the laying hybrid Lohmann brown-LITE hen has been used since 2011. A total of 16 laying turns were included for the observation during the period of 20112014. Due to the sufficient number of data a nine-month laying batch has been chosen. The highest average number of eggs laid by one hen for the observation period was achieved in the Profit-Tier Layer Cage System by Big Dutchman (257.0 pcs.). In the Laying battery Cage System by Kovobel the number of eggs was by 1.3 pcs lower (255.7 pcs). The lowest number of eggs was set down for laying hens kept in a cage free systems (249.2 pcs). It was 7,8 pcs and 6,5 pcs lower respectively than with laying hens housed in the cage systems by Big Dutchman and Kovobel. The highest average intensity of laying for 9-month laying period was found in the cage system by Big Dutchman (93.9%). In the cage system by Kovobel company it was 1.0 % lower (92.9 %). The intensity of laying at a cage free system amounted to 89.2 % pcs. It was 4.7 % and 3.7% respectively lower than when housed in the cage systems by Big Dutchman and Kovobel. For laying hens kept in a cage system the average consumption per hen in a day, for the observed period, was found out to be lower 117.6 g for the cage system by Big Dutchman company and 117.4 g for Kovobel. The highest average feed consumption showed 121.5 g with laying hens kept in a cage free system. The average mortality of laying hens during the observed period was 0.64 %