Zhao Yongju, Zhang Jiahua, Wei Hong, Sun Xinming, Mu Biao, Yu Mingju, Wang Lingbing
College of Animal Science and Technology, Chongqing Key Laboratory of Forage and Herbivore, Southwest University, Beibei, Chongqing, 400716, China.
Trop Anim Health Prod. 2010 Aug;42(6):1257-62. doi: 10.1007/s11250-010-9558-6. Epub 2010 Apr 1.
Two experiments were undertaken to select the efficient method applied for goat estrous synchronization. In experiment 1, a total of 120 does (Capra hircus) were divided into five groups with a randomized block design, and the does of treatment 1 were synchronized by intravaginal sponges impregnated with 30 mg Levonorgestrel inserted for 10 days. Does of treatments 2, 3, and 4 were treated with further injection of 25 IU follicle-stimulating hormone (FSH), 0.05 mg prostaglandin F2 alpha (PGF(2alpha)), and 25 IU FSH + 0.05 mg PGF(2alpha) at sponge withdrawal, respectively. The does in the control group (n = 40) without estrous synchronization treatment and natural estrous does were observed. In experiment 2, a total of 140 does in five goat farms in breeding and non-breeding seasons were treated with the selective efficient procedure. The results presented that all the employed treatments were capable of inducing and synchronizing estrous goats. According to estrous response and economy, the use of intravaginal sponges impregnated with 30 mg Levonorgestrel and 0.05 mg PGF(2alpha) (treatment 3) is the first choice for estrous synchronization, and 95.0% of synchronized does demonstrated estrus, which was significantly higher than that of treatment 1 (P < 0.05) and control group (P < 0.01). The percentages of ovulating of treatments 3 and 4 were the same (95.0%), which were significantly higher than that of treatment 1 (P < 0.01). The ovulation rates among different groups were not significant (P > 0.05). When the selective procedure was applied to five goat farms, 85.7% (120/140) of does demonstrated estrus, and the kidding percentage, litter size, and prolificacy rate were 53.6%, 0.95, and 177%, respectively.
进行了两项实验以选择适用于山羊发情同步化的有效方法。在实验1中，将总共120只母羊（Capra hircus）采用随机区组设计分为五组，处理1组的母羊通过植入含30毫克左炔诺孕酮的阴道海绵10天来实现发情同步。处理2、3和4组的母羊在取出海绵时分别进一步注射25国际单位促卵泡激素（FSH）、0.05毫克前列腺素F2α（PGF(2α)）以及25国际单位FSH + 0.05毫克PGF(2α)。观察未进行发情同步处理的对照组（n = 40）的母羊以及自然发情的母羊。在实验2中，对五个山羊养殖场处于繁殖季节和非繁殖季节的总共140只母羊采用了选择性有效程序进行处理。结果表明，所有采用的处理方法都能够诱导和同步发情母羊。根据发情反应和经济性，使用含30毫克左炔诺孕酮和0.05毫克PGF(2α)的阴道海绵（处理3）是发情同步的首选方法，95.0%的同步母羊表现出发情，显著高于处理1组（P < 0.05）和对照组（P < 0.01）。处理3和4组的排卵百分比相同（95.0%），显著高于处理1组（P < 0.01）。不同组之间的排卵率差异不显著（P > 0.05）。当将选择性程序应用于五个山羊养殖场时，85.7%（120/140）的母羊表现出发情，产羔率、产仔数和多产率分别为53.6%、0.95和177%。
