H. B. Baimischev, I. V. Uskova, E. Y. Petuchova
Samara State Agricultural Academy, ul. Uchebnaya, 2, pgt Ust’-Kinel’skii, Samarskaya obl., 446442, Russian Federation
Abstract. The optimal dose of Optigen fodder additive in the diet of cows was determined during the peak lactation period. The study was conducted in Samara region on Holstein cows after the second calving for 60 days, from 30 to 90 days of lactation. According to the principle of pair-analogs, 4 groups of animals (control, I, II and III experienced) were formed with 10 heads each. The diet contained 44.95% of dry matter. Cows in the control did not receive Optigen, animals from I, II and III experimental groups fed it in the dose of 80, 100, 120 grams per head every day, respectively. The milk productivity and qualitative indicators of milk of cows were studied. To characterize the physiological state, 5 animals from each group were bleeding at the end of the experiment using a closed Monovet system. Introduction of Optigen feed supplement in the dose of 100 g to the diet significantly increased milk production by 132.5 kg (up to 2502.80 kg), protein content – by 0.12% (up to 3.30%), fat content – by 0.11% (up to 3.76%), density – by 0.8 areometer degrees (to 28.60 areometer degrees), dry matter content – by 0.28% (to 12.24%), MSNF content – by 0.18% (up to 8.38%), compared with the control. This dosage significantly improved the blood cell count: the number of segmented neutrophils increased by 9.71% (up to 28.97%), eosinophils – by 2.84% (to 5.76%) with a decrease in lymphocyte content by 9.66% (to 55.78%), normalized the metabolism, which is confirmed by a significant increase in alkaline reserve in serum by 4.78 volume percents CO2 (up to 47.58 volume percents CO2), protein content – by 8.18 g/L (up to 75.08 g/L), the enzymes ALAT and ASAT – by 8.01 and 9.93 units/L (up to 52.18 and 84.15 units/L, respectively), compared with the control.
Keywords: fodder additive; lactation; dose; blood; milk; diet; protein; fat.
Author Details: H. B. Baimischev, D. Sc. (Biol.), proff., head of department (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); I. V. Uskova, applicant; E. Y. Petuchova, student.
For citation: Baimischev H. B., Uskova I. V., Petuchova E. Y. Optigen Feed Additive in the Structure of the Diet of Highly Productive Cows in the Peak Lactation Period. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. No. 5. Pp. 70-73 (in Russ.). DOI: 10.24411/0235-2451-2018-10518.