Milk productivity of cows when haylage with biological preservatives is included in the diet

Abstract

In the Middle Volga region, galega orientalis is used as a promising fodder crop for the legume family. The main disadvantage of galega orientalis is poor silage due to the low sugar content in plants. To eliminate this drawback, Laxil and Silostan biologics have been developed, which are based on live cultures of lactic acid bacteria. The aim of the research was to study the influence of haylage from galega orientalis, prepared with the addition of biological preservatives to the green mass, on milk productivity and milk quality of Holstein cows. In the experimental groups, compared with the control, the quality of haylage, indicators of scar metabolism, digestibility of nutrients in the diet, milk productivity of cows and milk quality were studied. It was found that in 1 kg of silage of the experimental trenches, the contents of metabolic energy, digestible protein, crude fiber were higher. With the inclusion of silage in the ration, the number of bacteria, ciliates, the content of protein nitrogen, the proportion of acetic acid in the composition of volatile fatty acid (VFA) were increased in the rumen fluid in cows. Cows better digested the dry matter of feed, crude protein, and crude fiber. As a result, the yield of milk of cows for 305 days of lactation in terms of basic fat and protein was higher by 11.6-15.9%. The chemical composition and physical properties of milk have improved by all studied indicators.