Partum and postpartum characteristics on the postpartum rebreeding in beef cattle

Abstract

The objective was to evaluate the influence of calving and postpartum characteristics, measured in different genetic predominance, on the postpartum rebreeding. Were evaluated 437 partum from cows that received feeding management consisting of a forage base of the native field and the mating season consisted of 90 days. The measurements were used from the data base (age of cow, genetic predominance, body weight, body condition score and date of calving) of the cows in the partum and postpartum period. The variables were submitted to analysis of multiple variances, multiple regression, correlation and cluster. Already the groups formed by cluster analysis were submitted to analysis of variance and F test and the means, compared by Student's t-test, α=0.05 probability. The increase in the mean at 0.14 points in the body condition score at calving and the occurrence of calving 9 days earlier at the calving season gives the Charolais genetically predominant cows repeat calves. The Nellore genetic predominance when they calved with similar body condition score (2.32 points) and showed a negative body weight gain at weaning (-3.0 kg and -2.1 kg) showed different behaviors, where they did not repeat the offspring, when they calved and weaned with smaller body weight.

Energy-protein supplementation before and after parturition of Nellore primiparous cows in the Brazilian tropical savannah

“…The metabolic effect of postpartum NEB affects negatively the inflammatory uterine response and delays uterine involution (Swangshan-Uthai et al, 2013). Total digestible nutrients in the diet determine the return of ovarian activity during the postpartum and are associated to the body condition score (BCS) and uterine involution (Joner et al 2018). In the present study all the cows had significantly loss of BCS from the first evaluation (210 days before calving) until artificial insemination, around 120 days after (6.25±0.10 vs 4.50±0.04, P<0.01), but no differences were verified between treatments after calving.…”

Effects of feeding a vitamin and mineral supplement to cow-calf pairs grazing native range

“…This concept of trace mineral contributions to the fetus has been described extensively with respect to Cu in maternal and fetal tissues, in which fetal liver accumulates greater concentrations of Cu as gestation progresses ( Gooneratne and Christensen, 1989 ). Thus, the rationale of investigating cow mineral status at pasture turnout in relation to DPP provides context to the re-alimentation period, or time period of physiological recovery that cows must undergo between calving and the establishment of a new pregnancy ( Short et al, 1990 ; Joner et al, 2018 ). The differences in concentrations of Se observed among the DPP groups indicate that perhaps an important part of the repair and recovery process in preparation for pregnancy attainment after parturition is the re-alimentation of body stores of trace minerals.…”

Influence of weaning management at 30, 75 and 180 days of age on non‐esterified fatty acids and reproductive performance in beef cows

“…A complementary analysis demonstrated that the PP at the end of the PD was higher in heavier cows at calving and with higher levels of P4 at 30 dPP, especially in W180 cows. Studies showed that the highest PP was observed in cows with greater body condition at calving and a low rate of pregnancy loss, emphasizing the importance of ensuring good nutritional status in the pre‐calving period to achieve BCS greater than 3.0 (Ayres et al, 2014; Moura et al, 2014) and to anticipate the return to postpartum cyclic activity (Joner et al, 2018). However, there was no difference in BW at birth between treatments, although W180 cows had a relatively lower BW that may have influenced this result.…”