THE EFFECT OF ENZYME PREPARATIONS (PHYTASE, XYLANASE) ON ENERGY METABOLISM IN BROILER CHICKENS

Abstract

The efficient utilization of nutrients and optimization of energy metabolism are key factors determining the productivity and economic efficiency of broiler poultry production. This study aimed to evaluate the effect of enzyme preparations, phytase and xylanase, on energy metabolism and energy utilization efficiency in broiler chickens during different growth periods (1-7, 8-16, and 17-28 days). Experimental studies were conducted using control and treatment groups, where broilers in the experimental groups received phytase alone and in combination with xylanase. Metabolizable energy utilization and energy efficiency were analyzed using statistical methods including ANOVA and Student’s t-test.
The results showed that the use of phytase improved metabolizable energy utilization by 3.4-4.6%, while the combined use of phytase and xylanase increased this parameter by 6.5-8.9% compared to the control group (P>0.95; P>0.99). Energy utilization efficiency was also significantly higher in the enzyme-treated groups, reaching 82.1% in the combined enzyme group during the finishing period. The synergistic effect of phytase and xylanase enhanced nutrient digestibility, reduced energy losses, and improved metabolic efficiency.
The findings indicate that enzyme supplementation, especially the combined use of phytase and xylanase, plays an important role in improving energy metabolism, enhancing feed efficiency, and increasing growth performance in broiler chickens. These results provide a scientific basis for the practical use of enzyme preparations in modern poultry nutrition.