Changes in the concentration of metabolites in the milk of lactating cows when feeding mineral and probiotic feed additives

The purpose of this work was to assess the actual acidity and the level of metabolites in the milk of cows when using activated zeolite and activated zeolite with probiotics Kluver Pro and Provitol as part of the diet. Analysis of spectral data on the basis of JSC PBE «Elita» was performed using a milk analyzer MilcoScan 7RM: pH according to ISO 26323:2009; urea according to ISO 14637:2004; BOMK and acetone according to de Roos (2007). Studies have found that feeding dairy cows with activated zeolite and probiotics had an impact on the pH of milk and the level of metabolites in it - urea, acetone and BHBA. Animals of the experimental groups were characterized by significantly lower levels of urea (by 22.85 (P ˂ 0.05) and 20.91 (P ˂ 0.05), acetone (by 50.00 (P ˂ 0.01) and 75.00 (P ˂ 0.01) and BHBA (by 55.56 (P ˂ 0.01) and 66.67 (P ˂ 0.01) in milk on the 80th day of the study.