Productive parameters achieved by the laying hybrid Lohmann Brown, bred on permanent layer

Abstract

The body weight of young hens was within the standard curve of the hybrid, but at its lower limit, because the poultries had a great movement freedom, and the standard was allowable for battery breeding. The peak of eggs yield was reached in week 28, but the level of egg-laying intensity did not correspond to the potential of the hybrid (92- 94%), being only of 78.11%, due to objective factors. The egg yield/hen reached the level of only 283.48 eggs. The specific fodder consumption was correlated to the low egg yield (190.69 g/egg), while the average daily consumption was higher than the normal one (110-120 g/head), being of 125.50 g/head. The rate of stock losses was influenced by the breeding system, on permanent layer, being of 11.61%, in comparison with the value of 94-96%, normal for the rate of stock preservation. We recommend this hybrid breeding on permanent layer, observing the following conditions: the use of young replacement hens, bred under the same system as adult poultries; breeding the biological material, from the age of a day until the end of the series; the increase in poultry denseness /surface unit, at 7-8 heads/m2 and the selection of young replacement hens at the moment of acquisition.