冷季绵羊能量平衡的初步研究

A Preliminary Study on the Energy Balance of Sheep during Cold Season

在冷季(10月至次年4月)运用气体能量代谢法和各种气象因素进行同步观测试验,对中国美利奴细毛羊不同营养状况下耐受低温的能力进行了试验。得出:在饥饿条件下,绵羊清晨产热量最高,然后趋于平稳;在饲喂条件下,食后1至2小时产热量达到高峰,夜间产热量较低。在0～-18℃的低温环境中,中等体膘,体重在40～50kg重的绵羊,气温每降低1℃,每天掉膘5.7～6.8g。这些指标对于制作畜牧气象专业预报服务产品提供了有价值的依据。

In cold season(from Oct. to April of the next year), the synchronous observation test was made in the gas energy superscssion method and various meteorological factors, the test was made on the ability of Chinese Merino in bearing low temperatures at different nutrient conditions. It concludes that under the hungry condition, sheep produce maximum hot energy in mornings and then trends to stable. Under feeding condition one or two hours after eating, producing hot energy reaches to the maximum, it changes to lower during night. In the low temperature environment of 0—18, for a sheep of middle fat wheighed 40—50kg when air temperature decreases 1, the fat fells down 5.7—6.8g every day. These indexes provide valuable basis for making professional forecasting services products on animal husbandry meteorology.