Effect of enzymatic preparations on improvement of energy utilization in broiler chick diets 1. canola meal

الملخص EN

This study was conducted using 390 unsexed day-old Arbor-Acres broiler strain chicks which, individually wing-banded, weighed and randomly distributed into 13 experimental groups of similar mean body weight of 3 replicates each and aimed to study the possibility of partially replacing dietary protein with canola meal (CM) protein with /without multicarbohydrase enzymes and its effect on growth performance, some carcass traits, some blood serum parameters and economical efficiency.

An experimental corn-soybean meal starter and finisher basal diets were formulated in which dietary protein was replaced by CM protein at replacement ratios of 16, 32, 48 and 64%.

Diets were formulated to be iso-nitrogenous and iso-caloric being 23% CP & 3000 kcal ME / kg for the starter diet and 20% CP & 3100 kcal ME/kg for the finisher diet.

Thirteen dietary treatments were compared.

One treatment consisted of the basal diet without CM (positive control diet).

Four treatments consisted of the positive control diet supplemented with 16, 32, 48 or 64% CM without enzyme supplementation (negative control diets).

Eight additional treatments consisted of the negative control diets supplemented with either Zympex® 008 or Xylam500 enzyme products at a level of 0.05%.

Live growth performance, carcass characteristics, some blood serum parameters, sensory evaluation of cooked meat and economical efficiency were determined.

From the nutritional and economical point of view, it could be concluded that substituting CM protein up to 48% for dietary protein in both starter and finisher broiler diets supplemented with Zympex® 008 enzyme product at a level of 0.05% has no detrimental effect on broiler chick's growth performance and gave the best economical efficiency.