TEMPO DE JEJUM APÓS ALOJAMENTO DE PINTOS DE CORTE: PESO E DESENVOLVIMENTO DOS ÓRGÃOS

Abstract

The negative effects of fasting chicks for a day after hatching until arriving at the farm can cause physiological and gastrointestinal changes in the birds. Which are directly related to changes in the physiological processes of development and adaptation that affect the development of birds. The objective was to analyze the fasting time on the performance and development of the digestive system organs. 432 Cobb chicks were used, distributed in a completely randomized design with four treatments, six replications and eighteen birds per experimental unit. The treatments consisted of different fasting times after accommodation, as follows: 0 hours; 2 hours; 4 hours and 6 hours. Data on zootechnical indices at different stages and organ development were evaluated. At seven days of age, 20 birds were euthanized to evaluate the weight of organs (liver, gizzard+proventriculus, yolk sac and intestines) in addition to the length of the intestine. The data were subjected to analysis of variance and, when significant, subjected to the Tukey test at 5%. The fasting time did not cause changes in the organs of the digestive system, as well as the weight and regression of the yolk sac. The performance of the animals showed a difference only in seven days, with lower weight for birds that fasted for six hours. It is concluded that fasting time does not affect performance in the total breeding period or the development of organs in the initial phase. Zootechnical performance stabilizes at 14 days in weight, and feed consumption after 4 hours of fasting is greater at 35 days.