Всероссийский научно-исследовательский институт физиологии, биохимии и питания животных – филиал Федерального государственного бюджетного научного учреждения «Федеральный научный центр животноводства – ВИЖ имени академика Л.К. Эрнста»
Silin M.A., Nekrasov R.V., Chabaev M.G.
Ernst Institute for Animal Husbandry, Dubrovitsy-Podolsk Moscow oblast,
Russian Federation
ABSTRACT. The aim was to determine the efficiency of two new enzyme preparations in the concentrates for growing and fattening pigs - protosubtilin G3x (PG3x) with activity of 120 U/g and GlucoLux-F (GL-F), which is produced by the microbial culture of Aspergillus awamori. Two series of physiological and practical experiments were carried out. In the first physiological experiment, the efficiency of PG3x was studied in young pigs (Large White×Landrace), divided into three groups, I (control) fed the base concentrate, II and III groups fed the same feed with the addition of PG3x at the dose of 50 and 75 g/ton respectively. In the second experiment, the control group was fed the basic concentrate, II and III groups fed the same feed with the addition of GL-F in the amount of 0.5 and 1.0 kg/ton, respectively. The practical evaluation of the efficiency of PG3x was carried out on two groups of Duroc piglets (n=500 each) in the age period of 137-197 days. The control group fed basic concentrate and the experimental group fed the same concentrate with the addition of PG3x in the amount of 50 g/ton. The evaluation of the efficiency of GL-F preparation was carried out on two groups of Large White pigs (n=200 each) in the age period of 45-105 days. The control group fed basic concentrate, the experimental group fed the same concentrate with the additionof GL-F in the amount of 500 g/ton.With the use of PG3x, the protein digestibility in group III was higher in comparison with control (P<0.05), in groups II and III, nitrogen utilization was 11.2-16.4% higher vs control by 8.1-13.4%, the cost of feed and metabolizable energy was lower by 7.5-11.8 and 5.1-5.6%, respectively. With the use of GL-F, protein digestibility in groups II and III was higher in comparison with control (P<0.05), and the urea content in the blood was lower (P<0.05) vs control, the average daily weight gain was higher by 9.8-10.3%, the cost of feed and metabolizable energy was lower by 4.7-6.1% and 9.0-9.3% vs control. In general, the obtained data testify the physiological and economic feasibility of introducing the enzyme preparations studied into the composition of mixed concentrate for young pigs of meat breeds and their hybrids.
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