| Resumo: |
The aim is to find ways of management to improve reproductive efficiency of dairy herds in recent post-partum through the use of analogues of PGF2(alfa) or cypionate of oestradiol, which may improve uterine health and reproductive efficiency. We used one hundred and fourteen cows girolandas randomly divided into three groups: CON - control; PGF2(alfa) - treated with two doses (500 g) of cloprostenol in the seventh and 14th day postpartum; CE - treated with a single application (3 mg) of estradiol, 24 hours after calving. Six animals from each group, three primiparous cows and three cows multiparous were subjected to blood sampling for performance of routine white blood cell count, blood sampling intrauterine to perform endometrial cytology and bacterial meningitis. Blood sampling occurred seven days of the date of calving, 24 hours, seven days, 14, 21, 28, 35 and 42 days postpartum. Collection of uterine material occur as well as in blood samples except the first (seven days before the expected date of calving). The total lymphocyte count was different (p <0.05) among treatments for primiparous cows and multiparous cows, with the first group PGF2(alfa) lower than the others and the second was the best. The primiparous cows had subclinical endometritis by endometrial cytology detected only in group CON, while bas pluriparous CON also beyond the EC. In primiparous cows, the CON group had a lower percentage of potentially pathogenic bacteria (p <0.05). Primiparous cows in the EC group had a higher percentage of pathogenic bacteria (p <0.05). The interval from calving/conception of primiparous and multiparous cows was respectively: CON-130,3, PGF2-176,1 e CE-161,6; CON-127,7, PGF2- 111,4 e CE-150,5. Concluded the CON treatment and PGF2 were presented better results in primiparous cows and multiparous cows, respectively. The economic evaluation, the application of cloprostenol only in multiparous cows makes the system more efficient and productive is the most economically profitable. |
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