Development and Application Technology of High-Energy Feed and Its Influence on the Ruminal Digestion and Milk Production of High-Yielding Cows

Аннотация

The composition, technology, and regulations of the Milkanizer liquid energy feed (LEF) for use in feeding high-yielding cows during the periparturient period for the purpose of increasing the energy of the ration and optimizing its sugar-protein ratio has been developed. The liquid energy feed is developed based on glycerol, propylene glycol, volatile fatty acids, polysaccharides, vitamins, and microelements. One kilogram of the preparation contains 28.6 MJ. Introduction of the LEF into the ration had a positive effect on the fermentation and microbiocenosis process of the rumen—the ammonia content increased by 0.2 mg % and the content of the volatile fatty acids (VFA) grew by 0.4 mM/100 mL mainly due to the acetate and reduction in the propionate and butyrate content. The amount of bacteria and infusoria in the rumen of the cows was significantly higher. The change in the microbiological composition of the rumen affected the amylolytic and cellulosolytic activity, which in the cows of the experimental group was lower by 4.9 E/mL and higher by 4.6%, respectively. Furthermore, the digestibility of the dry and organic matter of the ration increased mainly due to the crude protein, crude fat, and unstructured carbohydrates. The use of the LEF increased the fat and protein content in the milk and positively affected its acidity, thermal stability, rennet-fermentation test; the milk also had 2.3 times less somatic cells.