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Effects of ventilation of the sheep house on heat stress, growth and thyroid hormones of lambs

机译：羊舍通风对羔羊热应激，生长和甲状腺激素的影响

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Twenty single male Assaf lambs were divided into two groups and housed in semi-open barns. Air temperature averaged 35°C. For 9 weeks after parturation, one group was cooled by fan between 1000 and 1600 hours and the other group was not cooled. Rectal and skin (head and testis) temperatures, respiration rate, and pulse rate were recorded twice daily. Lambs were weighed individually every week and levels of T3 and thyroxin were determined. Differences in rectal, head, and testis temperatures (P < 0.05) and respiration rates (P < 0.01) between the two groups were significant. Growth was affected positively by fan treatment, live weight increased by 15%, and cooled lambs had higher thyroxin levels.
机译：将二十只单只阿萨夫（Assaf）雄性羔羊分为两组，并放在半开放式谷仓中。气温平均为35℃。分娩后9周，一组用风扇冷却1000至1600小时，而另一组则未冷却。每天两次记录直肠和皮肤（头部和睾丸）的温度，呼吸频率和脉搏频率。每周单独称重羔羊，并测定T3和甲状腺素的水平。两组之间的直肠，头部和睾丸温度（P <0.05）和呼吸频率（P <0.01）有显着差异。风扇处理对生长有积极影响，活体重增加15％，冷却的羔羊甲状腺素水平更高。

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