УДК 636.2.034:636.084:637.12.04/.07

PRODUCTIVITY AND TECHNOLOGICAL PROPERTIES OF COW MILK AT VARIOUS AMINOACID COMPOSITION OF METABOLIC PROTEIN IN RATION

Yu.V. Sizova, A.S. Zelenina

In production conditions on full-age cows of the Holsteined Black-and-White breed the authors studied the effect of various content of limiting amino acids in composition of metabolic protein on concentration of urea, dextrose and amino acids in blood in connection with yield of milk, milk formula, its adaptability to sterilization and cheese production. It was shown, that introduction to cow organism of additional amount of methionine, phenylalanine, histidine in composition of ration metabolic protein promotes to rising of milk productivity, yield of protein and fat with milk, and also permit to obtain high-quality raw material.

Key words: dairy cows, metabolizable protein, limiting amino acid, nitrogen metabolism.

ГНУ Всероссийский НИИ физиологии,
биохимии и питания сельскохозяйственных животных Россельхозакадемии,

249013 Калужская обл., г. Боровск, пос. Институт,
e-mail: bifip@kaluga.ru

Поступила в редакцию
3 февраля 2010 года