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0221U101172,
0116U001268
,
Examine the the laws of transformation of feed nutrients in dairy cows using highly nanospoluk micronutrients.
Dronyk Hryhoriy V, Доктор біологічних наук
15-01-2021
Bukovynian State Agricultural Research Station of the Institute of Agriculture of the Carpathian Region of the National Academy of Agrarian Sciences of Ukraine
Inclusion of citrate Cr and Se to the diet composition has facilitated the increase of average daily milk yield of cows during two trial periods and the final one. So, on the 15-th day of feeding supplements, the cows of І and ІІ trial groups had higher daily milk yields compared to the control, group respectively by 12,6 and 6,0 %, and in the 2-nd month of feeding supplements – by 9,1 and 17,7 %. Citrate additives Fe and Zn have facilitated the increase of average daily milk yield of cows during the whole trial period. Thus, on the 10-th day of feeding supplement of citrate Zn, cows of the ІІ trial group had higher daily milk yields, compared to the animals of the preparation period, by 23,4 %, and on the 20-th and 30-th day – by 16,2 and 11,7 %, respectively. The increase of average daily milk yield of cows was noted, as well as that of the animals from І trial group, on the 30-th day of feeding the additive, by 2,8 %. Addition of citrate Co has facilitated the increase of average daily milk yield of cows during all the trial and final periods. Thus, on the 20-th day of feeding the additive, the experimental group cows had higher milk yields by 16 %, and on the 30-th day and in the final period – by 16,4 and 16 %, respectively. Herewith, in the cows’ milk on the 20-th day the probable increase of total protein content (р<0,05), dry defatted milk residue (р<0,05), density (р<0,05) was observed, and in trial period, a tendency to fat level increase was detected. Inclusion of complex citrate additives Ni and Co, and Fe and Co into the animals’ diet has facilitated the increase of average daily milk yields of cows during all the trial period. Тhus, on the 20-th day of feeding the citrate Ni and Co, the cows of І trial group had higher daily milk yields by 7,6 %, and on the 30-th day of feeding supplements, in І and ІІ trial groups accordingly by 7,9 and 19,8 % (р<0,05).
2021-01-15
Updated: 2025-12-11
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