应用生殖激素治疗奶牛持黄不孕和提高情期受胎率的试验

TREATMENT TO PERSISTENT CORPUS LUTEUM AND RAISING CONCEPTION RATE DURING ESTRUS USING REPRODUCTIVE HORMONE FOR DAIRY COW

给53头因持久黄休、黄体囊肿引起长期(8个月以上)不发情的奶牛一次肌注0.2mg新型畜用前列腺素一氯前列烯醇,2-6d后发情率达96.23%。将供试牛分为两组(n_1=23头,n_2=30头),直检触诊,当卵泡发育到第二期时,进行人工授精。授精前,1组肌注促排卵素2号200μg和绒毛膜促性腺激素5000IU,2组肌注促排卵素8号200μg和绒毛膜促性腺激素5000IU。授精后24b再直检,对仍未排卵者进行第二次授精。经上述处理后,情期受胎率分别达78.26%和82.14%。

Abstract Each one was injected 0.2mg cloprostenol〔ICI80996〕 IM in 53 unestrous cows caused by persistent corpus luteum or corpus luteum cyst (more than 3 months). After 2-6 days, the total estrous rate reached up to 96.23%, then they were divided two groups in random way. When estrous Cow's follicle developed to second phase with rectal palpation, each cow of them was injected LRH-A 200μg and HCG 5000 IU IM in group I and LRH-A 200μg and HCG 5 000 IU IM in group Ⅱ,then AI was carried. After 24hr of insemination, the second AI was carried for unovulation cows. The results obtained showed that the conception rate during estrus was 78.2% (18/23)and 82.1%(23/28)in group Ⅰ and group Ⅱ, resp.