摘要
应用电测径器、B-型超声实时断层扫描仪(B-超)以及放射免疫等仪器和技术,对19头产后娟珊牛和50头荷兰黑白花牛的子宫复旧过程、规律以及影响其复旧速度的因素进行了研究。结果表明,两个品种正常牛子宫孕角、空角和子宫颈复旧的平均时间分别为32.3±2.1,28.0±3.6,38.3±4.0(娟珊牛)和35.5±4.5,30.8±5.9和37.5±5.0(黑白花牛)。两个品种牛子宫角直径大小分别和血浆中3甲基组氨酸(3MH)和羟基脯氨酸(HP)的含量呈显著(r=0.39,P<0.05)和极显著(r=0.52,P<0.01)正相关;产后患子宫感染及胎衣不下的牛,子宫复旧时间比正常组牛极显著延长(P<0.01)。产后脂肪肝的发病率为63.2%(娟珊牛)和46.7%(黑白花牛)。患脂肪肝的娟珊牛子宫复旧的时间比同品种正常牛显著延长(P<0.05)。娟珊牛产后第1次排卵的平均时间是13.2±1.2 d;黑白花牛为15.4±3.0 d。2个品种牛产后第1次排卵时间和子宫复旧时间呈显著正相关(r=0.64,P<0.05)(正常组牛)和非显著负相关(r=-0.53,P<0.2>0.1)(患子宫病组牛)。产后48h1次性肌肉注射外源性激素后,除雌二醇可显著延长子宫空角复旧的速度外,孕酮、催产素和前列腺素 F_(2α)(PGF_(2α))对子宫复旧速度均无显著影响。
The experiment was carried out on 19 Jersey and 50 Friesian postpartum cows to studythe procedure and the pattern of the uterine and cervical involution(UCI)and the factors af-fecting its rate by using electronic callipers and B-mode ultrasound scanner.The resultsshowed that the mean times for the previously gravid uterine horn(PGUH),previouslynon-gravid uterine horn(PNGUH)and cervix of the normal cows in both the breeds were32.3±2.1,28.0±3.6,38.3±4.0(Jersey)and 25.5±4.5,30.8±5.9,and 37.5±5.0(Friesian),respectively.There was a significant correlation(r=0.39,P<0.05)and a highly significantcorrelation(r=0.52,P<0.01)between the mean diameter of the uterine and the mean con-centrations of 3 methyl histidine(3MH)and hydroxyproline,respectively.The time for thecompletion of UCI was significantly(P<0.01)delayed in the cows with uterine disorder andretained placenta after calving compared with normal group of cows.A total of 63.2% of the Jersey cows had fatty liver compared with 46.7% of Friesiancows.The UCI was significantly(P<0.05)delayed in the Jersey cows with fatty liver com-pared with normal cows of the same breed,but not the Friesian cows with fatty liver althoughit had a longer period of time for the completion of UCI.The time for the first postpartum ovulation in the normal cows was 13.2±1.2 and 15.4±3.0 days for the Jersey and the Fricsian cows,respectively.This time was significantly corre-lated with the time for UCI(r=0.64,P<0.05)in the normal group of cows,while it had apositive correlation(r=-0.53)in the cows with uterine disorder after calving,however,it wasnot significant.The four exogenous hormones administrated intramuscularly within 48 hours after calv-ing had no effect on UCI except ocstradiol benzoate which delayed the UCI compared withthe control group,however,only the time for the PNGUH in oestradiol treated cows was sig-nificant statistically.
