Abstract
This research considers the use of the sorption-probiotic supplement Biopinnular in the amount of 0.5 and 1.0 % of the dry matter in the diets of calves of the dairy period. The results allows us to correct the microbiocenosis in the in the digestive tract by suppressing the development of pathogenic microflora and increased reproduction of Lacto- and Bifido bacteria. The studied supplement also contributes to deeper fermentation of fodder mass during digestion in the rumen, which is manifested in an increase in active acidity (pH), cellulolytic activity of bacteria, VFA content as the main product of carbohydrate fermentation, as well as enhanced ammonia-binding function of microflora, which led to better energy and protein availability of their body. This is confirmed by indicators of the morphological and biochemical status of the blood of calves, manifested in a real increase in their red blood cells, hemoglobin, protein and protein fractions. All this was confirmed by the intensity of their live weight gain, accompanied by large average daily (by 8.83 and 23.70 %, respectively) and relative (by 1.63 and 3.86 %) weight gains and smaller (by 0.44 and 0.64) EFU costs per unit of live weight gain. A more pronounced biological effect is observed when using a feed supplement at a dose of 1.0 % of the dry matter of the diet.
Highlights
The priority area in agriculture of Russia is to provide food security as one of the main factors of socio-economic stability of the state [1]
Dairy cattle breeding is one of the leading branches of agriculture, the productivity potential of which largely depends on the breeding effectiveness of replacement heifers
Optimization of the mineral nutrition of animals is ensured through the use of mineral feed supplements, whereas their price segment does not always satisfy the agricultural producer
Summary
The priority area in agriculture of Russia is to provide food security as one of the main factors of socio-economic stability of the state [1]. Dairy cattle breeding is one of the leading branches of agriculture, the productivity potential of which largely depends on the breeding effectiveness of replacement heifers Their high growth rate is accompanied primarily by the formation of a milky type of their body constitution which is often constrained by increased contamination of the consumed feed with inorganic (heavy metals) and organic (mycotoxins, antigenic-foreign microflora) xenobiotics, and by the insufficient content of mineral substances in them. Staff members of Ulyanovsk State Agrarian University and Inzamolprom created a feed supplement Biopinnular based on the local natural silicon-containing mineral diatomite and probiotic bacteria (TU 10.91.10-00384275297-2020) The combination of these components provides its unique sorption – probiotic properties. Gastrointestinal tract, indicators of cicatricial metabolism, morpho-biochemical status of blood and the dynamics of their live weight
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