Usage of the feed additive «Intermix» in the cows’ diet of summer keeping period

The present published paper focuses on results of the research which aimed at studying influence of «Intermix» concentrate in feeding of highly–productive cows and on intensity of metabolic process in the organism and level of milk production, amount of fat and protein with the herballow–concentrationdiet. The research continued for 90 days and was conducted following the scheme that, in the diet of summer period, presupposes usage of 70% – hay Medicago grass, 9.5% cereal hay, 20% stock feed (corn, wheat, barley), 0.5% salt and mineral premix. The control group is the one where premix was exchanged with the concentratefollowing the calculations of 50, 75, 100 gram per animal unit. The cows, belonging to simmental cattle, were chosen by the principle of analogues, namely 10 animal units in each group. The research proves that introduction of the feed additive «Intermix» to the diet of lactating cows of summer period has a positive impact on processes of intensive rumen metabolism, namely the concentration of the raw biomass increases, microflora, that indicates active synthesis of the easily digestible microbial protein. This process is active in the way that light fatty acids increase, which are the main predecessors of milk fat level that is increasing in the milk of tested groups’ cows. Due to the positive influence of «INTERMIX» concentrate on activation of the rumen, the direct relation between it and level of milk production has been established in the tested group of cows. The advantage of tested groups over the control group due to the last criterion equals to 6,8 – 7,7% accordingly, that allows us to draw the conclusion that it is advantageous to use «INTERMIX» concentrate in the diet of lactating cows.