Abstract To evaluate the effect(s) of the heat stress (HS) on body composition thirty-two growing Afshari lambs were randomly housed outdoor (OUT) without access to shade (mean temperature humidity index = 74.98) or kept indoor (IN) under shade (mean temperature humidity index = 73.08). At the end of study 10 lambs were processed and separable body protein and fat were determined. Neither morning rectal temperature nor morning respiratory rate were influenced by treatments, but both were increased in OUT lambs at evening measurement; the evening rectal temperature was higher in OUT lambs and they had more evening respiration rate (48 ± 1.4 more breath per minute). While there was no difference between treatments in carcass weight, fat-tail weight as a percent of cold carcass weight tended to be lighter (P = 0.13) for OUT lambs (15.17 %) than for IN lambs (18.77 %). Carcass separable fat with and without fat-tail showed no effect of treatments. Carcass EE was not influenced by environment. Carcass crude protein percentage was greater for OUT (16.64 %) than for IN lambs (15.17 %; P

中文翻译：

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阴影或无阴影对夏季生长的 Afshari 羔羊身体成分的影响

摘要 为了评估热应激 (HS) 对身体成分的影响，将 32 只生长中的 Afshari 羔羊随机饲养在室外 (OUT) 且无法遮荫（平均温度湿度指数 = 74.98）或保持在室内 (IN)阴凉处（平均温度湿度指数 = 73.08）。在研究结束时，对 10 只羔羊进行了加工，并测定了可分离的身体蛋白质和脂肪。早晨的直肠温度和早晨的呼吸频率都不受治疗的影响，但在晚上测量的 OUT 羔羊中两者都增加了；OUT 羔羊夜间直肠温度更高，夜间呼吸频率更高（每分钟增加 48 ± 1.4 次呼吸）。虽然处理之间的胴体重量没有差异，但对于 OUT 羔羊 (15.0) 而言，肥尾重量占冷胴体重量的百分比往往更轻 (P = 0.13)。17 %) 比 IN 羔羊 (18.77 %)。有和没有肥尾的胴体可分离脂肪没有显示处理效果。胴体 EE 不受环境影响。OUT (16.64 %) 的胴体粗蛋白百分比高于 IN 羔羊 (15.17 %; P