The role of energy-protein supplementation in feeding lactation cow

Abstract

Presented research aimed at studying the energy-protein supplement’s effect on cows’ milk productivity. The authors conducted a scientific and economic experiment in 2021 based on the branch of the Siberian Research Institute of Fodder of Siberian Federal Research Center of Agrobiotechnologies of the Russian Academy of Sciences Komsomolskoye livestock breeding farm of Pavlovsky district of Altai region. The study was conducted on four groups of cows of the Ob river region type of Black-and-White breed. Lactation cows of the control group were given a basic ration with the addition of 1 kg of feed concentrate. In the primary allocation, the authors added an energy protein supplement to the main diet for experimental groups at 500 to 1000 g/head—per day. It included vegetable feed (distiller’s grain, oil cake and soybean meal, corn gluten, sunflower meal, lupine), animal meal (blood and poultry meat), yeast culture Saccharomyces cerevisiae (Y1242), synthetic methionine and lysine, organic chromium and unique flavor and aroma additives. The mechanism of action of the additive is aimed at increasing the intensity of digestion, optimizing protein and fat metabolism in the body, and ensuring the growth of the rumen microflora. The main qualitative parameters of the new energy-protein supplement: are crude protein - 60%, exchange interaction energy - 11.5 MJ, lysine - 1.8%, methionine - 0.3, calcium - 2.0, and phosphorus - 1.0%. Furthermore, feeding energy-protein feed supplements in diets positively affected the average daily milk yield of cows during the experiment period. Thus, the average daily milk yield in the experimental groups increased by 3.4-9.2 kg compared to the control group of animals. Therefore, according to the experiment results, it was found that the most optimal dose of energy-protein supplement should be considered 750 g/cow per day, which contributes to an increase in milk productivity throughout the experiment by 10.1% (P≤0.05).