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首页> 外文期刊>Ciencia e Investigación Agraria >Effect of pre- and postpartum body development on the rebreeding of first-calf heifers
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Effect of pre- and postpartum body development on the rebreeding of first-calf heifers

机译：前后体外发育对第一小牛仔猎犬再培育的影响

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The objective of this study?was to evaluate the effect of live weight and body condition score, measured at different growth?stages, on the rebreeding of first-calf heifers. A total of 120 Nellore and Charolais crossbred?heifers born between 2004 and 2008 were assessed. Their average age was 26±1 months, they?were all from the same herd, and they received the same management from birth. To conduct?this study, pre- and postpartum measurements of first-calf heifers were taken. The data were?submitted to analysis of variance, and the means were compared using Student’s t-test at a?significance level of α=0.05. A higher live weight of the heifer at 24 months enabled early?calving within the first calving season (r=-0.30). First-calf heifers that rebred had a higher live?weight at weaning (361 kg vs. 333 kg) than those that did not, although their live weights at?calving were similar (344 kg vs. 332 kg). The rebreeding of first-calf heifers that gave birth with?the same body condition score as in the first calving was dependent on positive live weight gain?until the end of the following breeding season, especially during the calving-weaning period.
机译：本研究的目的是评估在不同生长的活体重和身体状况得分的影响，在不同的生长？阶段，在初级小牛仔母牛的释放中。共有120名NELLORE和CHAROLAIS杂交？在2004年至2008年间出生的小母牛被评估。他们的平均年龄是26±1个月，他们来自同一群，他们收到了出生的同样的管理。进行这项研究，拍摄了第一小牛仔母牛的预先和产后测量。数据是？提交差异分析，使用学生的T检验比较α= 0.05的α= 0.05的α= 0.05的方法。在早期的24个月之前，小母牛的高度活重？在第一季节（r = -0.30）内犊牛。重新编制的第一小牛仔母牛的活力更高？断奶的重量（361千克与333千克）比没有那些没有的人，尽管它们的活力在？Calcing的寿命相似（344千克与332千克）。获得生育的第一小牛仔母牛的释放？与第一产犊中相同的身体状况得分依赖于积极的活体重增加？直到以下繁殖季节结束，特别是在犊牛断奶期间。

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