Evaluation of different methods of forced molting on the performance of light laying

Abstract

The aim of this research was to evaluate two methods of forced changeand your effect on the change period, development and eggs quality, in the second production cycle of light laying. It waslodge 200 commercial laying Lohmann with 72 weeks of age in experimental store shed. The treatment were: Treatment 1- alimentary fast until lose approximately 25% of live weight; treatment 2- alimentary fast until lose approximately 25% of live weight, supplying with probiotic; treatment 3 –fed with vitamin and mineral mixture  without probiotic and treatment 4 - supplementation with vitamin and mineral mixture, with probiotic. The experimental arrange used was the complete randomly, with four treatments and five repetitions of 10 chickens each. The performance variables were: food intake, production, mass and weight eggs and alimentary conversion index (kg/dozen and kg/kg). The data statistical analyze was carried out by SAS - GLM procedure, and the means were compared by the Tukey test (P>0.05). The animals submitted at fast showing higher weigh lose, cease the eggs production and return more quickly to the eggs production. There was not difference (P>0.05) among the chicken groups fed or not considering the performance variables. The forced change could be obtained, without decrease in the production, with the offer of supplement to the chickens during the change period.