奶山羊乏情期诱导发情效果研究

The Study on the Induction Synchronization of Estrus at Goat during its Anoestrus

为使处于乏情期的奶山羊发情,采用孕酮阴道释放装置和孕马血清促性腺激素(PMSG)处理对三原莎能奶山羊种羊场的73只母羊进行诱导发情。试验羊分为三组,将含有孕激素的阴道栓置于试验羊阴道中9d,分别在撤栓前48h、撤栓前24h和撤栓同时(即Oh)配合肌肉注射PMSG 300 IU/只,研究孕马血清促性腺激素不同使用时间的诱导发情效果。结果三组羊的发情率分别为52.63%、78.79%和85.71%;同期率分别为42.11%、69.71%和76.19%,三者差异显著(P<0.05);羊只的发情时间集中在撤栓后48 h左右,以48 h为峰值呈现正态分布;发情羊发情持续时间分别为34.81 h、36.46 h和30.67 h。试验结果表明在撤栓同时配合肌肉注射PMSG的发情率和同期率最高,发情持续期最短,是可以在奶山羊生产中应用的诱导发情程序。

Originally experiment start on March 18 at San yuan a kind of insect ability the milk goat grow a sheep field to carry on, adopt Progesterone to prepare a processing, the vagina of Progesterone to release equip and the Cu sex gland hormone processing to San yuan a kind of insect ability the milk goat grow a sheep field of 73 ewes carry on inducement to be in heat, applied Progesterone the vagina bolt to carry on short date processing （the reason bolt for 9 days）, is withdraw to bolt an ex-48 h respectively, withdraw to bolt an ex-24 h and withdraw to bolt in the meantime （namely Oh） match with a muscle to inject the 300 IU/of the Pregnant Mare Serum Gonadotrophin （PMSG） Cu experiment, get of be in heat a rate to distinguish to 52.63%, 78.79% as a result, 85.71%; The same period rate distinguishes to 42.11%, 69.71%, 76.19% three differences show Zhao （P〈0.05）, be in heat of sheep time concentrated in 48 hours in front and back, with 48 hour in front and back for the Fend value present positive Tai to distribute. Be in heat the sheep is in heat time to distinguish for the 34.81 h, 36.46 h, 30.67 h. Experiment result enunciation is withdraw to bolt to match with a muscle to inject PMSG to get in the meantime of be in heat effect the best, our canning adopt in the production the fulfillment is withdraw to bolt to inject PMSG in the mean time. This since the convenience produce, economy labor force, in the meantime again can reduce to produce to the sheep body of should arouse.