Tenhagen B A, Heuwieser W
Tierklinik fhr Fortpflanzung, Fachbereich Veterinärmedizin, Freie Universität Berlin, Germany.
Zentralbl Veterinarmed A. 1999 Apr;46(3):167-76. doi: 10.1046/j.1439-0442.1999.00205.x.
Two reproductive management programmes were implemented on a dairy farm with 780 cows in milk to compare their effects on reproductive efficiency and endometritis. The herd was divided into two groups. All cows in Group 1 received 0.15 mg of D-cloprostenol (Preloban, Hoechst Roussel Vet, Wiesbaden) intramuscularly (i.m.) at 14-day intervals starting at 22-28 days postpartum (pp) until breeding. Group 2 was examined by rectal palpation twice during the third and fifth weeks pp, respectively. Cows that showed signs of endometritis were treated with a uterine infusion of 720 mg polycondensated m-cresolsulphuric acid-formaldehyd (14:1) in 150 ml of water (Lotagen, 2%, Essex Tierarznei, München). For both groups, the voluntary waiting period was set at 50 days pp. Cows were bred on observed oestrus. Cows not bred until day 71 pp were examined by rectal palpation and treated according to a predefined protocol. Group 1 had a higher service rate, and reduced days to first service (P < 0.05) and days open (7.6 days, P = 0.08). First service conception rate and total conception rate were lower than in Group 2 (P < 0.05) and first service conception rate was considerably lower than second service conception rate in Group 1 (P < 0.01). Days open were 4.5 days higher and conception rates were lower in cows with endometritis than in cows without endometritis at post-partum examination (P > 0.05). Results indicate that reproductive management programmes based on strategic use of prostaglandin F2 alpha present an alternative to conventional reproductive management programmes based on rectal palpation and uterine infusions in large dairy herds.
在一个拥有780头泌乳奶牛的奶牛场实施了两项繁殖管理方案，以比较它们对繁殖效率和子宫内膜炎的影响。牛群被分为两组。第1组的所有奶牛在产后22 - 28天开始，每隔14天肌肉注射0.15毫克氯前列醇（Preloban，赫斯特·罗素兽医公司，威斯巴登），直至配种。第2组在产后第三周和第五周分别进行两次直肠检查。出现子宫内膜炎症状的奶牛用150毫升水中含720毫克缩合间甲酚硫酸 - 甲醛（14:1）的子宫灌注液进行治疗（Lotagen，2%，埃塞克斯兽医公司，慕尼黑）。两组的自愿等待期均设定为产后50天。奶牛在观察到发情时进行配种。直到产后71天仍未配种的奶牛进行直肠检查，并根据预先定义的方案进行治疗。第1组的受配率较高，首次配种天数减少（P < 0.05），空怀天数减少（7.6天，P = 0.08）。首次配种受胎率和总受胎率低于第2组（P < 0.05），且第1组的首次配种受胎率显著低于第二次配种受胎率（P < 0.01）。产后检查时，患有子宫内膜炎的奶牛空怀天数比未患子宫内膜炎的奶牛高4.5天，受胎率更低（P > 0.05）。结果表明，在大型奶牛场中，基于前列腺素F2α的策略性使用的繁殖管理方案是基于直肠检查和子宫灌注的传统繁殖管理方案的一种替代方案。
