THE MILK PRODUCTIVITY OF COWS IN CONNECTION WITH THE USE OF GRAIN-HAY FEED FROM DIFFERENT CROPS

Abstract

The article presents the results of studies on the milk productivity of Ukrainian Black-motley dairy cows when replacing grain silage from a vetch-oat mixture to grain silage from winter triticale in their diets. The cows in the control group received a diet containing equal amounts (in terms of nutritional value) of corn silage and grain silage from a vetch-oat mixture. In the diets of the experimental group, 100% of this grain silage was replaced with grain silage from winter triticale. It was found that the preparation of grain silage from winter triticale and a vetch-oat mixture made it possible to obtain feed containing 34.1 and 36.1 g of crude protein, respectively, which exceeded corn silage in this indicator by 13.9 and 15.9 g, or 68.8% and 78.7%, respectively. Replacing the vetch-oat grain silage in the feed mixture with winter triticale grain silage, with a slight decrease in crude protein and crude fiber content, contributed to an increase in the content of indigestible protein by 32 g, starch by 69 g, sugar by 50 g, and fat by 19 g. During the experiment, the average daily milk yield of the control and experimental groups was 24.4 liters with a fat content of 3.73% and a protein content of 2.86% compared to 24.3 liters, 3.70%, and 2.97%, in control respectively. Feeding grain silage from winter triticale caused a slight decrease (by 0.03%) in fat content, but had a positive effect on the protein content in milk, which was 0.11% higher in the experimental group. The difference in the mass fractions of lactose, dry matter, and the mass fraction of dry skim milk residue in milk between the animals in the control and experimental groups was 0.05%, 0.1%, and 0.13%, respectively, in favor of the animals in the experimental group