Performance and carcass composition of broiler chickens submitted to different feeding periods

Revista Brasileira de Zootecnia

Machado, João Guilherme de Camargo Ferraz¹  Giachetto, Poliana Fernanda¹  Furlan, Renato Luis²  Malheiros, Euclides Braga¹  Macari, Marcos²  Furlan, Luiz Roberto¹ 

[1] UNESP;Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, Brasil

关键词: broiler chickens;    performance;    carcass composition;    diurnal and nocturnal feeding    Introdução A alimentação do frango;    além de corresponder a um alto percentual do custo de produção;    é responsável por diversos processos que afetam o desenvolvimento das aves e;    com isso;    a viabilidade econômica;   

DOI  :  10.1590/S1516-35982002000900015

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- This investigation was carried out to study the feeding period influence on broilers performance, viscera development, and carcass composition. A total of 630 broiler chickens, Cobb-500â strain, were allocated in three feeding programs from 8th day to 50th day of life: ad libitum (AL - food available 24 hours), diurnal feeding (DF – food provided ad libitum from 7 am to 7 pm and fed restricted from 7 pm to 7 am) and nocturnal feeding (NF- food provided ad libitum from 7 pm to 7 am and fed restricted from 7 am to 7 pm). The water was provided ad libitum for all groups during experimental period. The feeding period (12 hours at nocturnal and diurnal) significantly decreased the broilers' final body weight. However, broilers fed at night showed lower feed intake and had better feed conversion index. The different feeding periods did not affect liver, gizzard, heart and intestine length development. Broilers fed for 12 hours during the night and during the day showed higher carcass fat content. Ash content was not affected by feeding program. The results suggested that the adaptation to feeding program was slow, thus, the broilers were not able to keep the feed consumption compatible with their development, with lower productive performance and higher carcass fat.

【 授权许可】

CC BY-NC