Derno M, Jentsch W, Klein M, Küchenmeister U, Nürnberg K, Hartung M, Wünsche J
Forschungsbereich Ernøahrungsphysiologie Oskar Kellner, Rostock, Germany.
Z Ernahrungswiss. 1997 Dec;36(4):285-9. doi: 10.1007/BF01617799.
From theoretical considerations animals with a higher protein-fat ratio in the body should have a higher maintenance energy requirement (MEm). The literature on this problem shows a non-uniform picture with deviating results. From the results of a series of experiments it is possible to compare the heat production (HP) of male and female animals of the Vietnamese Sway-back breed pigs which vary quite widely in their body composition. The protein-fat ratio was 1.2 for the male and 0.2 for the female animals. In the experiments 4 male and 4 female animals in the live weight range of 20-33 kg and 33-42 kg, respectively, were involved. The HP measurements were carried out in climatized respiration chambers on two levels of energy intake at ambient temperatures of 6 degrees C, 12 degrees C, 18 degrees C, 24 degrees C, 30 degrees C, and 35 degrees C. The dependence of HP on the ambient temperature has been described by a cubic regression function. Thermoneutral temperatures are lower in the female animals caused by the better insulation effect of the backfat. The difference in HP which was expected by the large difference in body composition, was not found. The absolute protein mass determined the correlation to HP. Certainly the difference increased after lowering the ambient temperature. The influence of different factors on HP is discussed.
从理论上考虑，体内蛋白质与脂肪比例较高的动物应具有较高的维持能量需求（MEm）。关于这个问题的文献呈现出一幅结果各异的不统一画面。从一系列实验结果中，可以比较越南脊背猪不同性别动物的产热（HP）情况，这些动物的身体组成差异相当大。雄性动物的蛋白质与脂肪比例为1.2，雌性动物为0.2。在实验中，分别选用了体重范围在20 - 33千克和33 - 42千克的4只雄性和4只雌性动物。产热测量是在气候控制的呼吸室内，于环境温度为6摄氏度、12摄氏度、18摄氏度、24摄氏度、30摄氏度和35摄氏度时，在两个能量摄入水平下进行的。产热对环境温度的依赖性已通过三次回归函数进行描述。由于背膘具有更好的隔热效果，雌性动物的热中性温度较低。未发现因身体组成差异巨大而预期的产热差异。绝对蛋白质质量决定了与产热的相关性。当然，在降低环境温度后差异有所增加。文中讨论了不同因素对产热的影响。
