Influence of a complex mineral feed additive on hematological and biochemical blood parameters of replacement heifers

Abstract

The purpose of the work was to establish the effect of a complex mineral feed additive (CMFA) on hematological and biochemical blood parameters of replacement heifers. The research has been carried out under the conditions in the Republic of Bashkortostan on 3 groups of replacement heifers of Black-and-White breed per 10 heads in each, selected by the method of pairs of analogues. The animals of the control group have been received the main ration adopted on the farm + individual minerals, the heifers of the 1st experimental group have been received the main ration +50 g/head of CMFA according to recipe No. 1, the heifers of the 2nd experimental group have been received the main ration + 50 g/head of CMFA according to recipe No. 2. The use of the complex mineral feed additive contributed to the improvement of hematological and biochemical parameters in the heifers of experimental groups. Thus, the content of erythrocytes in the 1st experimental group by 4,78 % and in the 2nd experimental group by 7,48 % was higher, hemoglobin by 5,2 and 8,1 % (P < 0,05) in comparison with control animals. The leukocyte content in the 1st and 2nd experimental groups has been increased by 5,33 and 6,74 %, the total protein content by 2,94 and 6,52 % (P < 0,05), the calcium content by 9,52 and 14,72 % (P < 0,01–0,001), phosphorus by 10,0 and 14,86 % (P < 0,01–0,001), respectively, in comparison with the control group. At the same time, the experimental animals showed the increase in AST and ALT in the 1st experimental group by 2,78 and 1,05 %, respectively, in the 2nd experimental group by 8,33 and 1,08 %. The carotene content was within the physiological norm, the increase in this indicator has been noted in the experimental groups by 8,26 % (P < 0,05) and by 16,05 % (P < 0,01). Consequently, the use of complex mineral feed additives in the rations of replacement heifers of Black-and-White breed had a positive influence on the hematological and biochemical parameters of their blood. The effect of the feed additive made according to recipe No. 2 turned out to be more effective.