Authors:
I. N. MIKOLAYCHIK, doctor of agricultural sciences, professor, dean,
L. A. MOROZOVA, doctor of biological sciences, associate professor, head of department,
I. V. ARZIN, postgraduate student,
Kurgan State Agricultural Academy named after T. S. Maltsev (Lesnikovo, 641300, Kurgan region, Ketovsky dist.); e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.).
Abstract. The expediency of using yeast probiotic supplements in diets of highly productive cows during the period of ration is grounded. The influence of probiotics on digestibility of nutrients, cicatricial metabolism, milk production, as well as economic indicators of milk production was studied. For the study, four groups of black-motley breed cows were formed with 10 heads each. During the reference period, the animals were in the same conditions of feeding and maintenance. In addition to the main ration, the cows of 1st experimental group were fed Active East in the amount of 20 g/head/day, analogues of the 2nd experimental ones – Optysaf in the amount of 30 g/head/day, the cows of the 3rd experimental group – I-Sak 1026 10 g/head/day. Feeding in the composition of concentrated feeds of the yeast probiotic supplement Optisaf in an amount of 30 g/head/day ensured an increase in the digestibility of nutrients in the diet: dry matter by 2.23 %, organic matter by 2.13 %, crude protein by 2.78 % (P < 0.05), raw fat – 3.47 %, crude fiber – 2.86 % (P < 0.05) and nitrogen-free extractives – 1.55 %, and also increased the metabolic processes in the rumen of experimental animals in comparison with the control group. In the first 100 days of lactation, the milk productivity of cows, in terms of 4 % milk, increased by 336.3 kg, or by 9.83 % (P < 0.05), while the cost of milk decreased by 7.72 % and the profitability of its production increased by 12.35 %.
Keywords: microbiological supplements, feeding cows, digestibility factors, cicatricial metabolism, milk production.
