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首页> 外文期刊>畜産草地研究所研究報告 >Continuous Monitoring of Oxygen Consumption in Sheep Head and Estimation of Energy Expenditure from Oxygen Consumption
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Continuous Monitoring of Oxygen Consumption in Sheep Head and Estimation of Energy Expenditure from Oxygen Consumption

机译：连续监测绵羊头的耗氧量并根据耗氧量估算能量消耗

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An experiment was conducted with two non-lactating and non-pregnant ewes to evaluate a new method of determining the energy expenditure of the head. The sheep were previously prepared with skin-covered loops and with ultrasonic blood flow probes around the carotid artery, and they were fed Italian ryegrass hay. After inserting the blood gas sensors into the carotid artery and jugular vein, the blood oxygen concentration, blood flow rate, and activity of the animals were continuously monitored. Oxygenconsumption of the head was determined by multiplying the carotid blood flow rate and the difference in oxygen concentration between arterial and venous blood. The oxygen concentration of the carotid artery and jugular vein were relatively constant throughout a 3-day period; however, a rapid rise in the blood flow rate was observed. The rise in the blood flow rate was synchronized with the chewing activity of the sheep. Thus, the changes in the oxygen consumption of the head were associated with chewing. The calculated energy expenditure of the head was greater during eating and rumination than during resting. The rise in energy expenditure was greater during eating than that during rumination.
机译：对两种不哺乳和不怀孕的母羊进行了实验，以评估确定头部能量消耗的新方法。绵羊事先准备有皮肤覆盖的环，并在颈动脉周围装有超声波血流探头，并给它们饲以意大利黑麦草干草。将血气传感器插入颈动脉和颈静脉后，将连续监测动物的血氧浓度，血流速度和活动。通过将颈动脉血流量与动脉血和静脉血之间的氧浓度差相乘来确定头部的耗氧量。在整个三天的时间内，颈动脉和颈静脉的氧气浓度相对恒定。但是，观察到血液流速迅速上升。血液流速的上升与绵羊的咀嚼活动同步。因此，头部耗氧量的变化与咀嚼有关。经计算，进食和反刍过程中头部的能量消耗要比休息期间大。进食期间能量消耗的增加大于反刍过程中能量消耗的增加。

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