Desempenho produtivo de três diferentes raças de poedeiras durante o primeiro ciclo de postura

Abstract

This study aimed to evaluate the production performance of laying hens of White Plymouth Rock breeds (PRW), Barred Plymouth Rock (PRB) and Red Rhodes Island (RIR), during the first production cycle. The study was conducted at the Laboratory of Poultry (LAVIC), Department of Animal Science, Federal University of Santa Maria, in the period from March to May 2012. The birds were housed in an aviary experimental approach from the 18th week of age, having the same management and feeding conditions during the study period of 19 ° to 28 ° weeks of age, pullets housed three per cage, for a cell. There were used 499 chickens of three breeds (PRB 216, 187 and 96 RIR PRW). The parameters were egg production, egg weight and body weight. Eggs were collected daily, four times a day, for evaluation of egg production and egg weight and the birds were collected weekly. The results of this study showed that egg production, egg weight for the breed had a significant effect (P<0.01) and body weight was high significant difference (P<0.01). It is concluded from this work that there was significant difference (P<0.05) for the races during the experimental period. The Rhodes Island Red breed increased the production of eggs, race White Plymouth Rock had the highest egg weight and race Barred Plymouth Rock had the highest weight of the bird. For Rhodes Island Red breed had the highest egg production and lower body weight, showing that its performance was superior to other races, it is with a hen that has higher productivity and lower production costs due to lower consumption of breed for your life posture. Finally, we emphasize that studies of this nature tends to help entrepreneurs in the choice of breeds with good performance and will maximize production and minimize costs. It is suggested that these studies follow in progress, because little research on performance and productivity relating to genetic potential.