Effect of introducing Lamarine Saldonum into the diets of cows during dry period and period of lactation on their productivity and reproductive ability

The article presents the data on effect of Lamarin Saldonum additive reproductive function and milk productivity cows when used in different periods: 30 days 60 before calving (groups S1 S2), beginning from day (group S3) compared with control C4). Highly productive black white Holstein breed were experiment. was fed at a dose 0.4 g per 1 kg live weight during days. It found that S2 group had significantly shorter duration pregnancy than C4 groups by 6.2 8.2 days, respectively, remaining within limits physiological norm. shortest indifference-period to observed S3, significant difference being 15.25 % 18.39 %, respectively. least number fruitful insemination recorded S1, statistically differences 37.16 S3 – 28.82 27.67 which reliably reduced period infertility 57.33 relative values C4, as well 47.90 46.49 indicators S3. highest average daily yields S1: first month lactation, S2, 5.74 14.01 17.06 (psecond (at p0.05), 14.53 16.52 15.19 third 9.57 (p0.05), 13.06 10.94 100 lactation 11.90 16.86 (p0.05) 13.28 (p0.01), Thus, most optimal scheme application for stimulation is expected calving.