Effects of multienzymes in reduced energy diet on broiler chickens’ performance under heat stress

This study aims to investigate the multienzymes use , in broiler chicken under heat stress with low energy to estimate the Productive performance ( body weight, feed intake, feed conversation ratio and body weight gain), The experiment was conducted from December 27, 2023 to February 1, 2024. In a private field the AlIbrahimiyah area of Karbala, where the conditions were suitable for standard poultry farming, a total of 250 one-day-old broiler chickens of Rose 308 breed, with unsexed, were taken and divided into five groups. The first group consisted of 50 birds that Negative - control were (NCON) fed a basic diet without any additives and were kept away from heat stress, the second group consisted of 50 birds that were Positive control (PCON) fed a basic diet without any additives under heat stress. The third group consisted of 50 birds that were fed a basic diet with the addition of multienzymes under heat stress (MHS), the fourth group consisted of 50 birds that were fed a basic diet with the addition of multienzymes and reduced energy under heat stress) MLHS), the fifth group consisted of 50 birds that were fed a basic diet without additives under heat stress with reduced energy (LHS), After completing the experiment and collecting samples from chickens, a total of 20 samples from all replicates, the analysis results were as follows.