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The use of feed additives based on natural, environmentally friendly plant material is a growing topic. The new additive “Verva”-is a mixture of triterpenic sodium salts acids, derived from the fir tree wooden green shown to Increase the productivity of farm animals and birds and resilience to diseases (Mata-Campuzano et al., 2015). We report here the influence of “Verva” supplement on reproductive potential of stud bulls (n = 14), sperm quality and biochemical parameters (30 blood samples). Following treatment, changes in blood content (increase in Ca from 2.23 ± 0.08 mM to 2.33 ± 0.05 mM (p < 0.01); reduction of creatine kinase level from 365.28 ± 134.44 un/l to 243.75 ± 79.47 un/l (p < 0.05); decrease in GLDH from 49.56 ± 11.35 un/l to 31.80 ± 8.19 un/l (p < 0.01); decrease in aspartate aminotransferase concentration from 94.57 ± 14.33 un/l to 75.00 ± 10.31 un/l (p < 0.05) and decrease in cortisol from 114.87 ± 33.93 to 56.64 ± 6.99 nM (p < 0.05) were observed. Under supplementation, the volume of the ejaculate increased from 4.42 ± 0.65 ml to 4.72 ± 0.66 ml (p < 0.05) and concentration of spermatozoa increased from 1046.00 ± 154.79 mln/ml to 1115.00 ± 85.88 mln/m (p < 0.05). As a result of the experiment, there was an increase in the frozen doses of sperm obtained from bulls from 933.00 ± 356.72 to 981.25 ± 254.87 pcs (p < 0.05). Thus, the use of the feed additive “Verva” was economically beneficial and a promising way to improve the reproductive performance of breeding bulls, as well as the normalization of animals biochemical processes, which may lead to an improvement of the productive life of males. So, the use of the feed additive “Verva” positively influenced biochemical indicators of blood of bulls and their reproductive characteristics. |
