Utilização de dieta pré-inicial na fase préalojamento de frangos de corte oriundos de matrizes de diferentes idades

Abstract

The objective of this study was to evaluate the use of pre-starter diet during the pre-housing in chicks from Cobb broiler breeders with 33 and 68 weeks of age. We used one thousand and eighty chicks male Cobb 500, distributed in experimental boxes and housed in a completely randomized design with two treatments per breeder age and seven replicates with 30 chicks each. The treatments consisted of chicks from broiler breeders of 33 and 68 weeks of age given diet pre-housing or fasting. The pre-starter diet was provided from 0 to 7 days old. The zootechnical performance were analyzed weekly until 42 days old. The 24 and 48 hours and 7 days of age, two chicks per repetition, totaling 14 chicks per treatment were sacrificed for study of the weights of gastrointestinal organs and, likewise, were sacrificed to study carcass characteristic until 42 days of age. The presence of food affected the post-hatch performance, organ weights and carcass characteristics of broilers. The administration of the diet post-hatch affected the weight of the chicks two days old, but do not affect the production factor in broilers. The weights of the intestines and pancreas, two and seven days of age were affected by pre-starter diet. Considering the results for the parameters of the performance and carcass characteristics presented in this study, we found no reasons to justify the adoption of feeding programs in post-hatch broilers Cobb for ages of slaughter currently. However, at 14 days was advantageous to use pre-starter diet and may be destined for a new market that slaughter chickens at this age.