胚胎移植蒙贝利亚种公牛在北方地区适应性研究

本研究于2008年7月～2011年3月,对进口胚胎移植出生并经选育的9头蒙贝利亚种公牛的环境适应性、生长发育、抗病能力、繁殖性能等进行了观察、测定和分析研究。结果显示,30月龄时平均体高151.89cm,睾丸周径42.11cm,体重922.67kg,平均日增重0.959kg。10月龄开始初次采精,24月龄正式采精;平均每次射精量6.20mL,鲜精活力0.732,精子密度13.083亿个/mL,平均利用率82.8%,均产冻精40 606剂;冻精活力≥0.4,精子畸形率<15%。精液质量达到牛冷冻精液国家标准(GB4143-2008)。适应性研究表明,胚胎移植蒙贝利亚种公牛对北方地区的环境条件较为适应,生长发育状况良好,抗病力强,具有良好的繁殖生产性能。

Study on the Adaptability of the Transferred Montbeliard Embryos Bulls in Northern Region of China

From July 2008 to March 2011, the environmental adaptability, growth, disease resistance, reproductive performance of nine Montbeliard breeding bulls derived from imported embryo transplant were measured and analyzed. Results showed that the average height and average testicular circumference in the age of 30 months were 151.89cm and 42.11 cm, respectively. Average weight and average daily gain were 922.67kg and 0.959kg, respectively. Initial semen collection was in 10 months old and formal semen collection in 24 months old. The average volume per ejaculate was 6.20mL, fresh sperm viability of 73.2%, density of 13.08~108/mL, average utilization rate of 82.8%, average frozen semen of 40606. Semen energy exceeded 0.4, rate of abnormal sperm was less than 15%. The quality of bovine frozen semen could meet the national standard GB4143-2008. Results showed that Montbeliard breeding bulls from imported embryo transplant had a good adaptability, strong disease resistance and breedin~ performance in northern region