Rutherford Naomi H, Gordon Alan W, Lively Francis O, Arnott Gareth
Agri-Food and Biosciences Institute, Large Park, Hillsborough BT26 6DR, UK.
School of Biological Sciences, Queens University Belfast, Belfast BT9 7BL, UK.
Animals (Basel). 2019 Nov 19;9(11):1000. doi: 10.3390/ani9111000.
Rumen temperature boluses are becoming increasingly used as a means of monitoring core body temperature for the detection of ill health. However, the effect of behavior on rumen temperature is largely unknown. This research investigates the impact of behaviour and diet on the rumen temperature of Holstein bulls, both at grass, and in a housed environment. Rumen temperature was recorded at five-minute intervals using a bolus. Direct observations were conducted on young bulls in two studies (i) at grass ( = 30) and (ii) while housed ( = 32). In addition, activity monitors were attached to bulls at grass ( = 24). Within each study, diet differed by the level of concentrate supplementation. There was no effect of diet on rumen temperature. Significant differences in rumen temperature were observed between behaviour groups for bulls at grass < 0.001) and housed ( < 0.001). Furthermore, drinking resulted in the lowest rumen temperature (grass 35.97 °C; housed 36.70 °C). Therefore, rumen temperature is affected by behavior; however, the temperatures recorded were not outside the normal temperature range for healthy cattle.
瘤胃温度缓释丸越来越多地被用作监测核心体温以检测健康状况不佳的一种手段。然而，行为对瘤胃温度的影响在很大程度上尚不清楚。本研究调查了行为和饮食对荷斯坦公牛在放牧和圈养环境下瘤胃温度的影响。使用缓释丸每隔五分钟记录一次瘤胃温度。在两项研究中对年轻公牛进行了直接观察：（i）在放牧时（n = 30）和（ii）在圈养时（n = 32）。此外，在放牧的公牛身上安装了活动监测器（n = 24）。在每项研究中，饮食因精料补充水平的不同而有所差异。饮食对瘤胃温度没有影响。在放牧的公牛（P < 0.001）和圈养的公牛（P < 0.001）中，行为组之间的瘤胃温度存在显著差异。此外，饮水导致瘤胃温度最低（放牧时为35.97℃；圈养时为36.70℃）。因此，瘤胃温度受行为影响；然而，记录的温度并未超出健康牛的正常温度范围。
