FEED ADDITIVE TO INCREASE DAIRY PRODUCTIVITY OF COWS

feed additive; humic substances; potassium humate; yeast; milk; productivity; cattle.

Abstract

Using of feed additives for increasing the productivity of dairy cattle is relevant in agriculture. Duringof the researchthe producer strain Saccharomus cerevisiae, the components of the nutrient medium, the optimal concentration of potassium humate for obtaining yeast biomass, the parameters of deep yeast cultivation in the presence of domestic potassium humate with a humic content of up to 56% by dry matterwere selected. For obtainingthe feed additive, a technological scheme has been worked out: yeast cultivation for 48 hours with deep cultivation at rest; 24 hours when grown in a fermenter with aeration of 120-150 rpm, at 28°C with a pH of 5.0±0.5. Analysis of the effectiveness of the feed additive on laboratory animals (mice) showed superiority in live weight by 2.8 g of the experimental group.In the experience on the livestock of dairy cows, it allowed to increase milk productivity. 2 groups of animals were formed, 100 heads each, control (CG) and experimental (EG), according to the principle of pairs of analogues. The average daily milk yield after a month of taking the feed additive was more in the EG than in the CG by 4.1 kg, and by the 3rd month by 8.74 kg.The output of products (fat and protein) in the EG received more was almost 38% higher than the CG.