Prevention of transport stress in imported heifers improves their health status and their productive parameters

Abstract

The dynamics of bioamines in platelets, neutrophils, lymphocytes and blood plasma of imported heifers indicated that experimental group of animals experience stress, which is accompanied by an adequate release of bioamines from the deposit sites: catecholamines - by 9.2-17.1%, histamine - by 2.2-6.1% and serotonin by 1.0-3.9% (P <0.05-0.001). Intramuscular injection of PS-7 and Prevention-N-C preparations to transported animals had a supportive effect on the formation of body biochemical adaptation mechanisms to the conditions of long-term transportation. After application of biopreparations the improvement of the reproductive traits of heifers of the 1st and 2nd experimental group was indicated the age of successful insemination was shortened by 1.35 and 1.53 months, the first calving age - by 1.0 and 1.2 months, the insemination index - by 1.42 and 1.93 times, the service period - by 8.8 and 12.2 days and increased fertilization after the first insemination by 1.7 and 2.0 times (P <0.05-0.01), rather than in the control. Heifers of the 1st and 2nd experimental group surpassed their peers of the control group in milk yield for 305 days of lactation by 109 and 125 kg (P <0.05), fat content by 0.16 and 0.27% and protein content by 0.04 and 0.07%.