Effect of carbohydrate hydrolytic enzyme complex in combination with energy feed on rumen digestion, metabolism, productivity and fatty acid composition of milk fat in cows

The research was carried out on 2 groups of dairy cows 30 heads the farm with formation technological according to timing calving and milking unit individual accounting milk yield. Cows experimental group in period two weeks before for months after were added diet, respectively, 150 300 ml / head day energy feed based propylene glycol glycerin a complex enzymes cellulase, xylase, beta-gluconase glucoamylase activity (EFEC). main diet consisted traditional designed receive an average daily yield 25 kg milk. EFEC had practically no effect pH ammonia content rumen chyme, but increased VFA it by 3.6%. It total microbial mass, reduced population infusoria 23.5% bacterial 27.8%. positive protein-nitrogen metabolism, liver function, antioxidant activity, hormonal status hematology. As result, during 3 lactation, 19.9, 20.9 21.1 (P<0.001), which higher than control 13.0, 9.4 16.5%, respectively.