IMPACT OF ADDING CITRIC ACID, SYMBIOTIC AND ORGANIC ZINC AS ANTI-GLYCATION AGENTS ON PROTEIN UTILIZATION IN BROILER DIETS

Abstract

The present study was carried out at the Poultry Research Unit, Regional Center for Food and Feed (RCFF), Agricultural Research Center, Ministry of Agriculture, Giza, Egypt. The trial lasted 6 weeks from March and April, 2019. Current study conducted to investigate the influence of dietary levels of protein (CP) and anti-glycation feed additives including citric acid (CA), symbiotic (Sym), and Zn- methionine (Zn-Meth) on the performance of broiler, including carcass characteristics, intestinal morphology, cecal microbial counts, blood parameters, and economical efficiency. In this study, 320 one-day unsexed broiler chicks were randomly distributed into 8 treatments, with 4 replicates and 10 birds each in a completely randomized design. The experimental diets were formulated to contain 2 levels of protein (optimal level and low level) and feed additives including citric acid (2%), symbiotic (0.1%) and zinc-methionine (0.05%). The experimental diets were formulated to meet the nutritional requirements recommendations according to Cobb 500 guide with the exception of CP in low protein diets. Water and feed in mash form were offered ad- Libitum during experimental period from 1 to 42 days of age. Accordingly, 8 treatments were used in this experiment as follows: