Abstract
Currently, the use of enzymes as feed additives is standard practice, and most feed for broiler chickens in industrial poultry contain enzymes. The use of a protease enzyme can increase the protein utilization rate and therefore can reduce the protein requirement in broiler chickens. Our studies have shown that the introduction of the protease Sibenza DP 100 in addition to the main diet of broiler chickens without reducing the nutritional value of crude protein and digestible amino acids has a positive effect on maintaining the integrity of intestinal villi, which probably allows the bird to absorb more nutrients feed, contributing to the increase in productive performance. The use of Sibenza DP 100 in the diet with a decrease in the nutritional value of crude protein and digestible amino acids in accordance with the matrix by 2.5% is characterized by a good state of the histological picture of the duodenum, with the bird slightly at the end of fattening inferior to the control of live weight and was characterized by the most effective consumption of feed per 1 kg of live weight gain among all experimental groups. Application Sebenza 100 DP in the diets with reduced nutritional value in accordance with the matrices on 5 and 7.5% for crude protein and digestible amino acids on the totality of the studied parameters was ineffective.
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