Аuthor: O. A. BYKOVA, candidate of agricultural sciences, assistant professor,
Ural State Academy of Veterinary Medicine (13 Gagarin Str., 457100, Troitsk)
Abstract: Investigations related to the integrated study of the influence of sapropel and saproverm “Energy Etkul” when included in the diet on milk yield and milk composition of cows. For scientific expertise were formed seven groups of cows peers Simmental Austrian selection of 10 animals each. The experimental animals, in addition to the basic diet was prepared and sapropel and saproverm “Energy Etkul” in different dosages, which was set in a mixture of concentrated feed during the morning feeding for 15 days. Introduction diet supplements performed in triplicate with an interval between administrations of the diet for 15 days. For the experiment used the lake sapropel deposits Yetkulsky District Orenburg, Chelyabinsk region. Analysis of amino acid composition of milk proteins was carried out by ion exchange chromatography. Calculation of amino-acid score was performed by comparing the actual content of the amino acids in the proteins of milk with a scale of FAO/WHO. Found that the introduction of the diet of cows and sapropel and saproverm “Energy Etkul” contributed to the increase of mass fraction of essential and some reduction in the concentration of essential amino acids in the composition of milk protein, as well as increase the biological value of the proteins of milk cows’ experimental groups. Sapropel and saproverm “Energy Etkul” significantly increase the content of essential amino acids in milk protein of cows’ experimental groups after 90 days of research on the 7.4–9.6 % and 11.6–13.6 %. In order to improve the nutritional value of milk optimal use of sapropel in a dose of 0.75 g/kg body weight per head per day; saproverm “Energy Etkul” — at a dose of 0.95 g/kg body weight per head per day.
Keywords: sapropel, saproverm, milk protein, amino acids, amino-acid score, biological value of milk proteins.
