Optimization of protein and carbohydrate nutrition of Holstein-holmogorsky cows during the period of milking

Abstract

The basis for obtaining high milk productivity of cows is the provision of their protein and energy. As a result of the research, it was established that during heat treatment of feed, containing a high percentage of protein and low disintegration in the rumen had a high digestibility in the intestine. By reducing the protein disintegration of feed from 63.6% to 48.1% during the first phase of lactation (1-100 days), animals used nitrogen better and increased their productivity. Voluminous feed are of great importance in feeding ruminants to provide them with energy. However, the quality of roughage does not always meet the necessary requirements for this purpose. The carbohydrate feed of Holstein-Kholmogory cows during the period of milking was studied taking into account the quantity and quality of fiber of Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) in diets and the effectiveness of their use in the European North of the Russian Federation. It has been established that a decrease in the neutral detergent fiber in the rations of experienced cows from 42.1 to 37.0% and acid-detergent fiber from 28.5% to 24.5% leads to an increase in the digestibility of dietary nutrients, improves nitrogen metabolism, enhances microbiological activity in the rumen of cows. Optimum relationship in the rations of the highly productive cows of neytralnodetergentnoy and kislotnodetergentnoy cellulose tissue leads to strengthening of metabolic processes in the organism of animals, effective use of fodders, increase in the productivity.