ACCUMULATION OF VITAMIN-A IN THE LIVER AND BLOOD OF BULLS AT DIFFERENT LEVELS IN THE DIETS OF BULLS FED WITH FOOD INDUSTRY WASTE
УДК: 636.2.034 DOI: 10.31588/2413_4201_1883_2_258_38
Keywords:
bulls, fattening, experience, vitamin A, groups, liver, blood, concentrationAbstract
The paper summarizes the results of studies to determine the A-vitamin status of black-and-white bull calves at different levels in the diets of those fed on food industry waste (barda, pulp, beer pellet).The conducted analyses of liver samples and blood serum of experimental bulls found that at the beginning of bard fattening, up to 24.72-26.34 micrograms of vitamin were deposited in the liver per g of raw tissue, with the pulp type its concentration was slightly lower and ranged from 22.46 to 23.64 micrograms/g. The maximum concentration of this vitamin was detected in the liver of bulls fattened on beer pellets, which ranged from 67.58 to 69.80 mcg/g of raw tissue. By the end of the bard fattening, the concentration of this vitamin in the liver increased 1.5 times (P<0.001), by the end of the pulp by 1.2 times (P<0.05) and on the beer pellet by 1.16 times (P<0.001), which amounted to 38.64, 26.93 and 80.75 mcg/g, respectively. With an increase in the dose of vitamin A in diets, the amount of its deposition in the liver increases significantly. Thus, its reserves in the liver of animals from the second experimental group with bardian fattening amounted to 57.64 mcg/g, with pulp -- 41.46 mcg /g and with fattening on a beer pellet -- 157,86 mcg/g. The accumulation of vitamin A in the liver of bulls of the third experimental group, respectively, amounted to 74.35, 62.76 and 172.06 mcg/g of raw tissue. All this indicates an improvement in the body of bulls of A - vitamin metabolism, which is typical for absolutely healthy animals. Studies have also found that with the replenishment of reserves of this vitamin in the liver, there is an increase in its accumulation in the blood.
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