MILK PRODUCTION OF UKRAINIAN BLACK MOTTLED DAIRY COWS USING OF CHELATES OF COPPER, ZINC AND MANGANESE
In the article was shown the effect of different doses of inorganic salts and chelates of copper (Cu), zinc (Zn) and manganese (Mn) on milk production of Ukrainian black mottled dairy breed cows in the first four months of lactation. A control group of cows received a premix of sulfate salts of Cu, Zn and Mn in doses that are 100 % covered their lack in a forage. Experimental animals from I, II and III groups received premixes with chelate complexes of Cu, Zn and Mn (calculated on pure element), which offset the deficiency of trace elements in the feed ration for 100, 50 and 25 %, respectively. As a result, studies is shown that the use of chelates Cu, Zn and Mn as mineral feeding cows improves milk production animals compared with using of sulfate salts. It was found that compared to control group, the cows of I and II experimental groups had higher gross milk yield of 4 % fat corrected milk (FCM) at 124,1 kg (P <0,05) and 152,7 kg of milk, respectively. The amount of milk fat received for 120 days of experiment was different for animals Groups I and II to 5,63 % (P < 0,05) and 6,87 % for the control. Amount of milk protein was higher in I group by 4,1 kg, in the II - by 5,4 kg, compared with the control. It was established that the cows of the third experimental group had the lowest milk production, so this experimental dose of trace elements does not effectively use in animals feeding.