STUDYING THE IMPACT OF ADDING PROBIOTIC ON THE PRODUCTIVE PERFORMANCE OF BROILER STRAINS UNDER ENVIRONMENTAL CONDITIONS OF EGYPT

Abstract

This experiment was carried out at poultry breeding farm in Shalakan, Poultry Production Department, Faculty of Agriculture, and Ain Shams University. It designed to evaluate the productive performance for broiler strain when probiotics added for the broiler diet and exposed to high temperature during the first week under environmental conditions of Egypt. Some measurements taken in this study like: (body weight – body weight gain – feed consumption – feed conversion ratio - carcass characteristics - abdominal fat – blood parameters – Pha-p Cell-mediated immunity). The main results could summarize as follows: 1. Body weight and gain Body weight. • The broiler chicks group added probiotics by 50gm/100kg feed and exposed to high temperature during the one week of old was significantly heaviest body weight in all period of experimental another 5-week compared to other groups. • It was concluded that the marketing weight (5wk) of control + broiler chicks was exposed to high temperature during the one week of old significantly heavier than that other groups. In the same