定时输精程序处理下性控冻精对不同胎次奶牛应用效果探究

Study on the Application Effect of Controlled Frozen Semen on Cows of Different Parities Under a Timed Artificial Insemination Program

摘要:

良种荷斯坦奶牛性控冻精技术在定西市应用的时间不长,目前还处在推广试验中,为了评估良种荷斯坦奶牛性控冻精在不同胎次奶牛中的应用效果,本文通过查阅资料、试验示范,采用定时输精程序(Ovsynch/TAI)处理方法,以临洮县和谐牧业科技有限公司无繁殖疾病、繁殖功能正常、卵泡发育好的第一胎、第二胎和第三胎之间的各20头良种荷斯坦奶牛为试验对象,以良种荷斯坦奶牛性控冻精细管为试验材料,对不同胎次奶牛的同期发情率、怀孕率、产犊率及犊牛性别比例等实验研究,结果显示:(1)头胎奶牛发情20头,发情率为100%,第二胎奶牛发情18头,发情率为90%,第三胎奶牛发情16头,发情率为80%。(2)60头良种荷斯坦奶牛经过两次定时输精程序处理的后,头胎奶牛怀孕20头,怀孕率为100%,二胎奶牛怀孕13头,怀孕率为65%,第三胎奶牛怀孕15头,怀孕率为75%。(3)公司60头奶牛中怀孕牛有48头,产牛犊48头,产犊率为100%,成活头数45头,成活率为93.8%。研究认为,青年牛使用性控冻精情期受胎率远高于经产母牛,母犊出生率高达90%以上,成活率也比较好,效果很明显,为在奶牛养殖过程中广泛开展性控冻精技术的应用提供参考。

Abstract:

The application of semen control technology for high-quality Holstein dairy cows in our city is still in its early stages and is currently being promoted through trials.To evaluate the application of semen control technology in high-quality Holstein dairy cows of different parity,this study reviewed relevant literature and conducted demonstration trials using a timed artificial insemination(Ovsynch/TAI) program,Lintao County Harmony Animal Husbandry Technology Co.,Ltd.no reproductive disease,normal reproductive function,follicle development of the first fetus,the second and the third fetus between 20 high-quality Holstein cows as the test object,Using the fine tube of fine Holstein cow as the test material.Experimental studies on the concurrent estrus rate,pregnancy rate,calving rate and calf sex ratio of dairy cows with different parity.The results show that:(1)The first dairy cows had 20 estrus,with an estrus rate of 100%,the second cows were 18 with 90%,and the third cows had 16 with an estrus rate of 80%.(2)After 60 bred Holstein cows underwent two scheduled insemination procedures,20 cows were pregnant,the pregnancy rate was 100%,13 second cows were pregnant,the pregnancy rate was 65%,15 of the third cows were pregnant,the pregnancy rate was 75%.(3)Among the 60 cows of the company,there are 48 pregnant cows and 48 calves,the calving rate is 100%,45 surviving heads,and the survival rate is 93.8%.The study believes that the birth rate of young cows during the sperm control period is much higher than that of postpartum cows,the birth rate of female calves is more than 90%,the survival rate is also good,and the effect is obvious,which provides reference for the extensive application of sperm control technology in the process of dairy cow breeding.