USE OF RYE SILAGE AND BREWER’S GRAINS IN DAIRY COW DIETS

Abstract

It has been established that the use of wet brewer’s grains and rye silage in feeding dairy cows allows to optimize crude protein content and significantly reformulate the daily feeding of protein ingredients of mixed fodder from 130 g/l of milk to 90 g/l of milk, which, provides a significant reduction in the daily cost of the dairy cow’s diet accordingly. At the same time, the dry matter content of the diet is reduced to 35.0%, and moister diet is consumed by a cow with increased appetite. In addition, the strong point of diets based on wet brewer’s grains and rye silage is the absence of starch in their composition. It allows to ensure the content of total starch at the level of 20.0% of the dry matter of the ration to formulate a complete mixed ration. Even against the background of higher sugar content in rye silage compared to maize silage, such diets have the appropriate total starch + sugar content which prevents metabolic disorders such as acidosis and will have a positive impact on the duration of productive use of cows. Taking into account the mineral and vitamin composition of typical and innovative diets for cows during lactation, it was found that diets based on maize silage and alfalfa haylage contain more natural calcium, phosphorus, magnesium, copper, zinc, as opposed to rations based on rye silage, which are richer in natural sodium, potassium, chlorine, sulfur, iron, manganese, cobalt, selenium and iodine.