The value of the components of usefulness feeding lactating cows

The development of recipes for feed mixtures for lactating cows based on feed obtained in agriculturalorganizations with the addition of mineral supplements and molasses was relevant. A scientific and economic experiment was carried out in the Bryansk region on dairy cows of black-and-white breed. Animals were divided into two groups by the method of pairs-analogues in terms of live weight, ageand productivity level of 10 heads in each. Feeding an experimental version of the feed mixture tolactating cows in the amount of 42.2 kg per day with a content of 159 MJ of metabolic energy provideda daily milk yield of 18.5-18.9 kg of milk, or 2.2% more than the control values. The mass fraction of fatand protein in milk was 3.64-3.72% and 3.0-3.1%, respectively, in the experimental and controlgroups. The addition of smectite tripoli to the concentrated part of the diet instead of the addition ofmonocalcium phosphate leveled its deficient mineral component, while enriching the feed mixture withessential microelements, which in turn had a positive effect on mineral metabolism. So, in fact, suchindicators of blood serum as the content of calcium and phosphorus exceeded the control values by10.0 and 14.3%, respectively. The inclusion of fodder molasses in the composition of the feed mixturehad an impact on carbohydrate metabolism, as evidenced by a decrease in the need for lactatingcows in the experimental groups in energy feed units by 2.4% for the synthesis of 1 kg of milkcompared to the same control indicator. The morpho-biochemical parameters of the blood of lactatingcows of the experimental group were slightly higher, but they were within the reference ofphysiological values. Due to the optimization of metabolic processes in lactating cows and theinclusion of fodder molasses and smectite tripoli in the composition of the feed mixture, the level ofmilk productivity and some of its indicators increased.