The influence of coniferous-mineral additive on the milk productivity of fi rst-calf heifers under conditions of Yakutia

Abstract

The purpose of this work was to carry out the infl uence of a coniferous-mineral feed additive on the milk productivity of fi rst-calf heifers under the conditions of Yakutia. The results of a research to study the influence of the coniferous-mineral feed additive on the milk productivity of Simmental first-calf heifers under the conditions of Yakutia have been presented in the article. The selection and testing of animals for the experiment was carried out according to generally accepted livestock technical methods. The inclusion of experimental feed additives in the rations of animals of the 2nd, 3rd and 4th experimental groups made it possible statistically signifi cant to increase the average daily milk yield of milk by 5,46 %, 5,96 and 5,83 % and the milk yield for the experiment (lactation) in these groups was more by 5,41 %, 5,96 and 5,80 %, respectively, compared to the 1st control group. The use of feed additives from local natural raw materials in the rations of experimental group of animals aff ected the digestibility and absorption of nutrients. Against the background of the use of experimental feed additives, the coeffi cients of nutrient digestibility in animals of the experimental groups increased compared to the 1st control group: for dry matter by 1,47 abs.%, 1,89 and 1,59 abs.%, for organic matter by 1,91 abs.%, 2,66 and 2,45 abs.%, crude protein by 1,49 abs.%, 1,89 and 1,63 abs.%, crude fat by 2,02 abs.% , 2,55 and 2,48 abs.%, crude fi ber by 2,46 abs.%, 3,78 and 3,40 abs.%, nitrogen-free extractive substances by 1,70 abs.%, 2,42 and 2,31 abs.%, respectively, by groups. Thus, the use of coniferous-mineral additive helps to improve the digestibility of nutrients in the body of animals and increase the milk productivity of cattle under the conditions of Yakutia.