Immune protection of calves depending on the composition and biological value of colostrum | Иммунная защита телят в зависимости от состава и биологической ценности молозива
2013
Karput, V.A., National Academy of Sciences. Scientific and Practical Center of Animal Breeding (Belarus)
The aim of the research was to determine the effect of the quantity and quality of colostrum on energy growth of calves, their incidence and safety in the first two weeks of postembryonic development. Studies of calves' blood serum showed that the first few hours after birth before colostrum intake the protein level was low – 4.2 g%, which after colostrum drinking increased up to 6.3 g%. Also the number of Ig G (playing the role of stability indicator to illnesses) increased up to 1458 mg% and Ig M up to 127-181 mg%. Later immunoglobulin levels decreased in the first month after birth. Then starting from the second month after birth the number of immunoglobulins increased and by 9-12-month the level of immunoglobulins G-and M-Class almost reached the value for adult animals. The highest level of the neuromin acid contents (the major component of the carbohydrates stimulating growth of bifidobacterium) it is found out in colostrums of the first milk yield. Next day its contents has decreased in 2 times, for the second day in 2 times, and in the further till sixth day kept approximately at the same level with increase at 10-th day of a lactation
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Эту запись предоставил National Academy of Sciences of Belarus