Dynamics of indicators of linear growth and physique indices of marketable young beef poultry depending on live weight at day old

Abstract

Relevance. The article presents the indicators of linear growth and physique indices of the industrial poultry flock of the meat direction of productivity in different age periods, depending on the body weight of the bird at the daily age.Results. A general trend of a positive effect of the gradation of chicks by live weight at day-old age on linear growth indicators and physique indices was revealed. It was established that in the post-incubation period of ontogenesis in broiler chickens, the exterior indicators significantly increased from 1 to 35 days. The body length changed more intensively at the age of 7–14 and 14–23 days, the length of the keel — 14–23 days, at the last stage, the chest width and chest girth increased the most. The maximum values of physique indices are noted at the initial stage of ontogenesis: massiveness — at the age of 14 days, stubble — 7 days, long-legged and broad-bodied — 1 day, eirisomy and shortness — 7 days. In the future, the value of the indices decreases and increases again by the age of 35 days.