Reproductive data from 304 cows were analyzed in milk herds of the western central region of the Rio Grande do Sul (RS), Brazil, to evaluate the effect of diseases in the postpartum period and their effect on the reproductive issues related to specialist (n = 180), semi-specialist (n = 84), and non-specialist (n = 40) systems of milk production. For statistical analysis ANOVA and correlation at 5% significance were used. The results revealed that 42% of females had postpartum disorders (129/304) and 58% were healthy (175/304). At 60 days after AI, 51% (114/225) of the cows were pregnant. Sick postpartum animals had a low rate of pregnancy (19%). In the specialized and non-specialized systems, a correlation (P = 0.00227; 0.0310) was detected between healthy animals and pregnant, among patients and non-pregnant (P = 0.0289; 0.0160), respectively. The incidence of uterine infection detected by ultrasound after parturition (28%) was higher than the incidence in animals with mastitis (16%). None of the production systems has proved to be an effective model to prevent postpartum disease. The incidence of disease postpartum, as well as the incidence of uterine infections, was similar between the systems of production. The neosporose, uterine infections and mastitis were the reproductive health problems most prevalent in the study. This study was support by CNPq graduate funding to the first and second authors.
Body morphometry and temporary weaning (TW) associated to two protocols of fixedtime artificial insemination (FTAI) with intravaginal progesterone releasing device (IPRD) upon pregnancy rates were evaluated. Cows, at 45-59 days post-partum, were randomly divided into group 1 (n=147) and group 2 (n=197). Group 1: received 1g progesterone (IPRD) and 2mg estradiol benzoate on day 0 (EB-D0); 150g D-cloprostenol on day 7 (PGF-2-D7); 0,5mg estradiol cypionate and (TW-48 hours) on day 9 (EC+TW-D9); FTAI on day 11 (D11); group 2: IPRD+EB (D0); PGF-2+EC+TW (72 hours) on D8; FTAI (D11). The pregnancy rate was higher in cows submitted to TW (72 hours) than in cows with TW (48 hours), or rather, 49.74% vs 30.60% (p<0.05). There was a statistical difference (p<0.05) in groups 1 and 2 between pregnant or non-pregnant cows with regard to body weight (412kg vs 400kg and 419kg vs 390kg) and body condition score (BCS) (3.33 vs 3.08 and 3.53 vs 3/32) respectively. Further, 72-hour weaning associated to the applied protocol improved the pregnancy rate. The evaluation of BCS during post-partum may adjust the start of the breeding season.Keywords: calf, temporary weaning, FTAI, zebu cows, post-partum. RESUMOO presente trabalho teve o objetivo de avaliar a morfometria corpórea e a remoção temporária dos bezerros (RTB), em dois protocolos de inseminação artificial em tempo fixo (IATF) com dispositivo intravaginal liberador de progesterona (DILP), sobre as taxas de prenhez. Vacas com 45 a 59 dias pós-parto foram divididas em grupo 1 (n=147) e grupo 2 (n=197), recebendo no grupo 1: 1g progesterona e 2mg de benzoato de estradiol no dia zero (DILP+BE-D0); 150g de D-cloprostenol sódico no dia 7 (PGF-2-D7); 0,5mg de cipionato de estradiol e RTB (48 horas) dia 9 (CE+RTB-D9); IATF dia 11 (D11) e grupo 2: DILP+BE (D0); PGF-2+CE+RTB-72 horas (D8); IATF (D11). A taxa de prenhez foi maior em vacas submetidas à RTB por 72 horas, em relação à de 48 horas; 49,74% × 30,60% (p<0,05). Houve diferença (p<0,05) nos grupos 1 e 2 entre vacas prenhes e não prenhes para peso (412kg × 400kg; 419kg × * fernandoputti@tupa.unesp.br Brazilian Journal of Biosystems Engineering v. 9(4): 348-357, 2015 349 390kg) e condição corporal (ECC) 3,33 × 3,08; 3,53 × 3,32, respectivamente. A RTB de 72 horas, associada ao protocolo pode ter elevado a taxa de prenhez. A avaliação do ECC durante o pós-parto pode ser usada para estimar o início da estação de monta.Palavras-chave: bezerro, remoção temporária, IATF, vacas zebu, pós-parto.
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