VOLUME 1 Issue1/4
DOI: https://doi.org/10.32636/agroscince.2022-(1)-1-34
Digestion of feed nutrients and its influence on milk productivity of cows
when using the improved РVMA
Mykhailo POLULIKH, candidate of agricultural sciences
Hryhorii SEDILO, doctor of agricultural sciences, professor, academician
Vasyl KAPLINSKYI, candidate of veterinary sciences
Institute of Agriiculture of Carpathian Region NAAS
Abstract. The article presents the results of studies of digestibility of feed nutrients and its effect on milk productivity of cows when using in the diet of improved protein-vitamin-mineral additive (РVMA) in contrast to the standard РVA 60-1-89. According to the results of physiological experiment, the following can be stated: the use in the structure of silage-concentrate diet of lactating cows in the structure of feed (25 % by weight) of experimental РVMA probably increases the digestibility of dry matter, crude fat, crude fiber, crude protein, nitrogen-free extractives (NFE), organic matter); has a positive effect on the absorption of Nitrogen in the body of lactating animals, and hence on the processes of its inclusion in the synthesis of milk on the background of the standard РVA 60-1-89. Thus, feeding experimental РVMA to lactating cows in the silo-concentrate diet helps to increase the average daily milk yield, its chemical composition (fat, protein, dry matter, calcium) at a slightly lower cost of feed units and digestible protein, compared to the standard РVA 60-1-89. Summarizing the data obtained, the following should be emphasized. The improved version of РVMA is made on the basis of rapeseed and fodder bean extrudate (to replace sunflower and soybean meal and fodder yeast) and experimental premix adjusted for deficits in the Precarpathian region BAS (Sodium, Sulfur, Cuprum, Zinc, Iodine, Selenium and vitamins A, D) provides the optimal level of key feeding parameters of dairy cows comparing to РVA 60-1-89.
Key words: dairy cows, feeds, diets, balancing feed additives, premixes, rumenal fermentation, Nitrogen balance.