УДК 636:591.146:637.12.04/.07
LACTATIONAL VARIABILITY OF MILK PROTEIN COMPOSITION IN DIFFERENT SPECIES OF AGRICULTURAL ANIMALS
N.N. Mukhametgaliev, R.R. Khaertdinov, F.I. Gafiatullin, A.R. Mukhametshina
In the condition of practical experiment the authors studied a dynamics of keeping and qualitative composition of milk proteins in 3 species of agricultural animals: the Tatarstan type of cattle, the Russian carthorse breed, and the pigs of Large White breed. It was shown, that lactational changes of protein composition have specific features. The content of milk protein in cattle is reducing from the beginning to the middle of lactation and after that raising gradually to the end of lactation. The horses have an opposite correlation. In addition, the ratio of milk protein fractions in horses during lactation changes substantially. Similar changes occur in pigs, but less apparently than in horses. The cow milk is characterized by stable ration of protein fractions during whole lactation (with the exception of last decade, when the part of total protein, casein, serum protein raises sharply and the composition of milk protein changes).
Key words: cattle, horse, pig, lactation, milk, proteins, fractions, caseins, whey proteins.
ФГОУ ВПО Казанская государственная академия |
Поступила в редакцию |
