Effect of enzyme preparation Hemicell® HT on the metabolism of young geese
Authors: Babenko S. , Bomko V. , Kuzmenko O. , Cherniavskyi O. , Tytariova O. , Slomchynskyi M. , Nedashkivsky V. , Sobolieva S. 
Published: January 2025

The digestive processes in poultry are influenced by many factors: age, sex, poultry cross, productivity direction, and diet. The main indicators of digestive physiology in scientific works on complete poultry nutrition are the determination of nutrient digestibility coefficients, nitrogen, calcium and phosphorus metabolism. During the balance experiment, the goslings of the control and experimental groups received an identical diet in the identical dosage. Complete consumption of the feed mixture ensured the daily nutrient intake of the experimental birds. The digestibility of nutrients from the feed ingested by the body largely depends on the enzymatic activity of the internal secretion glands, the secretory function of the digestive tract and individual organs. When goslings were fed a complete feed mixture alone (geese of the 1st control group), the digestibility of the dry matter of the feed mixture was 75.8%, Adding 150 g per 1 tonne of feed mixture of the enzyme preparation Hemicell®HT (geese of the 2nd experimental group) increased its digestibility by 0.9%, increasing the dose of the enzyme preparation to 250 g (geese of the 3rd experimental group) - by 1.4, to 310 g (geese of the 4th experimental group) - by 1.5%. A similar pattern was observed with organic matter. While in geese of the 1st control group the digestibility was 77.8%, in the analogues of the 2nd group it increased by 1.2%, in the 3rd group - by 2.4 (p≤0.05) and in the 4th group - by 2.1% (p≤0.05). The increase in the digestibility of organic matter in the diet of goslings of the experimental groups was mainly due to the digestibility of crude protein and crude fat. The highest digestibility of protein was observed in geese of the 3rd experimental group and amounted to 93.6%, then in the 4th analogues - 92.2 and in birds of the 2nd experimental group -91.0%, which is higher than in the 1st control group, respectively, by 5.0% (p≤0.05), 3.6 and 2.4% (p≤0.001). However, a low dosage of the enzyme preparation, in contrast to the medium and high dosage, contributes to a higher digestibility of crude fat in the poultry body. Thus, while in geese of the 1st control group the digestibility of crude fat was 52.2%, in the analogues of the 2nd experimental group it increased by 12.0% (p≤0.001) and amounted to 64.2%, in geese of the 3rd experimental group - by 8.1% (p≤0.01) and amounted to 60.3%, in analogues of the 4th experimental group - by 9.7% and amounted to 61.9% (p≤0.01). There were no significant differences between the groups in the digestibility of crude fiber and BER. The digestibility of crude fiber ranged from 29.2% in the goslings of the 1st control group to 31.8% - in the counterparts of the 4th experimental group, and the digestibility of BER - from 81.8% in the goslings of the 2nd experimental group to 83 .1% in goslings of the 3rd experimental group. Thus, the digestibility of nutrients in goslings’ diets is affected differently by the enzyme preparation, with low dosage mainly affecting the digestibility of crude fat, medium dosage - crude protein, high dosage - the digestibility of crude protein and fat, but less than the medium dosage. The highest use of nitrogen in the body of goslings is observed when the enzyme preparation is included in the main ration at a dose of 250 g per 1 ton of feed mixture. The enzyme preparation has less effect on the digestion and deposition of phosphorus in the body, while the highest deposition of calcium in the body is observed at the average dosage of the preparation under study. The low dosage of the enzyme preparation does not affect the increase of its retention in the body of goslings.
Key words: geese, enzyme preparation, Hemicell® HT, chemical composition, digestibility coeffcient, metabolism.