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首页> 外文学位 >Effect of fenceline contact at weaning for performance in beef calves in the southwestern United States.
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Effect of fenceline contact at weaning for performance in beef calves in the southwestern United States.

机译：在美国西南部，围栏接触对断奶仔牛生产性能的影响。

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摘要

This study examined fenceline contact between beef calves and cows at weaning and the subsequent comparisons for behavioral distress and related reductions in weight gain. Eighty-seven crossbred calves were randomly assigned to 3 treatment groups for eight weeks. Six replications were conducted to determine the effect of different weaning techniques on their subsequent growth while three replications were observed for behavioral differences. Treatments were 1) fenceline separation from dams for one week, 2) fenceline separation from dams for two weeks, and 3) total separation (abrupt weaning) from their dams. Calves were weighed on the day of weaning and at 7, 14, 35 and 56 days post-weaning. In the days following weaning, the one-week fenceline weaned calves spent more time eating (eating hay) than either the total separation or two week fenceline weaned treatments (P < 0.05). The total separation treatment spent more time pacing and in close proximity to the fence (P < 0.05) than the other two treatments. The one week and two week fenceline treatments spent less time calling (vocalizing) to their dams than the total separation treatment (P < 0.05). The one-week fenceline treatment gained more weight than the other treatment groups during the first week (P < 0.05) and continued to be heavier at the end of eight weeks (P < 0.001). It was concluded that providing fenceline contact between beef calves and beef cows for one week following weaning reduces behavioral indices of distress seen in the totally separated calves. In addition, one week of fenceline contact with dams at weaning minimizes losses in weight gain in the days following separation.
机译：这项研究检查了断奶时牛犊和母牛之间的栅栏接触，以及随后的行为困扰和体重减轻的相关比较。将八十七头杂种小牛随机分为三个治疗组，持续八周。进行六次重复以确定不同的断奶技术对其后续生长的影响，同时观察三次重复的行为差异。处理方法是：1）将围堰与围坝分开一星期，2）将围堰与围坝分开两周，以及3）与围坝进行彻底隔离（断奶）。在断奶当天以及断奶后第7、14、35和56天给小牛称重。在断奶后的几天中，与完全分离或两周围栏断奶处理相比，一星期围栏断奶犊牛的进食（吃干草）时间更长（P <0.05）。与其他两种处理相比，总的分离处理花费更多的时间在步调上并且更靠近栅栏（P <0.05）。一星期和两周的围栏处理花费的时间少于总隔离处理（P <0.05）。在第一个星期，为期一周的围栏治疗比其他治疗组增加了体重（P <0.05），并在八周结束时继续增加（P <0.001）。结论是断奶后在犊牛和肉牛之间提供围栏接触一周可以减少在完全分离的犊牛中出现的窘迫行为指数。此外，断奶后与围堰的围栏接触一周可以最大程度地减少分离后几天体重增加的损失。

著录项

  • 作者

    Burgess, John Dugan.;

  • 作者单位

    Tarleton State University.;

  • 授予单位 Tarleton State University.;
  • 学科 Animal sciences.;Food science.;Behavioral sciences.
  • 学位 M.S.
  • 年度 2015
  • 页码 56 p.
  • 总页数 56
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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