Prebiótico e antibiótico como aditivos nas rações pré e pós-alojamento para frangos de corte

Abstract

This study aimed to evaluate the use of feed containing prebiotic or antibiotic, in the pre and post accommodation on the performance of broilers. We used 720 day-old chicks, males, Cobb-500 strain, distributed in randomized blocks with four treatments with six replicates of 30 birds each. The treatments consisted of: Antibiotic - birds fed diet with added antibiotics in pre- and post-housing; Prebiotic - birds fed feed with added prebiotic in pre and post accommodation; No aditivo- birds fed without feed additive in pre- and post-housing; Fasting - birds fasted in the pre-stage housing and feed intake with antibiotics in the post-stage housing. The provision of pre-feed accommodation within the transport boxes started in the incubator, and the pre-accommodation time of 24 hours. For productive performance analysis of bird, have assessed the variables of: average weight, feed intake, weight gain, feed conversion, production factor and production viability. The use of pre-accommodation prebiotic or antibiotic property diet resulted in significant improvements (p < 0.05) in body weight and weight gain of chicks in step 1 to 7 days. This happened regardless of the use of additives in feed provided the pre-housing and pre-initial phase. The final performance of broilers was not affected (P >  0.05) for the use of additives in the pre and post accommodation. Thus, it is concluded that the supply of pre-housing portion is not required for broilers tested in fasting period.