The current study evaluated the effects of dietary roughage:concentrate (R:C) ratios and water supply on the carcass characteristics and yield of lambs. Forty Santa Inês crossbred lambs with an average body weight (BW) of 19 ± 2.8 kg were evaluated in a completely randomized design with a 2 × 2 factorial arrangement consisting of two proportions of roughage and concentrate (30:70 and 70:30) and two levels of water supply (ad libitumand restricted to 0.5). The animals were slaughtered at an average weight of 28 ± 31 kg. Centesimal composition, colour parameters(L*, a* and b*), shear force, cooking losses and pH were determined on theLongissimus lumborummuscle. There was no interaction effect between the R:C ratio and water supply on the evaluated variables. Total BW gain, average daily gain and final BW were affected by water restriction and R:C ratio. Water restriction reduced total BW gain, average daily gain and final BW. No effect of water restriction was detected on slaughter weight, centesimal composition, colour variations, shear force, pH, weight or yield of carcass. No effect of water restriction and diets was observed on the cuts, except for neck weight. Carcass weight and yield were affected by the R:C ratios. Restricting the water supply to 0.5 does not affect the carcass weight or yield of Santa Inês crossbred lambs or their meat quality characteristics (centesimal composition, colour, shear force and pH measurements). A higher proportion of concentrate in the diet results in heavier hot and cold carcass weights.

中文翻译：

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不同粗饲料：精料比例和饲养场羔羊的供水：胴体特征和肉类化学成分

目前的研究评估了粗饲料：精饲料 (R:C) 比例和供水对羔羊胴体特征和产量的影响。平均体重 (BW) 为 19 ± 2.8 kg 的 40 只 Santa Inês 杂交羔羊在完全随机设计中进行了评估，该设计采用 2 × 2 因子排列，由两种比例的粗饲料和精饲料（30:70 和 70:30）和两级供水（随意并限制为 0.5)。屠宰的动物平均体重为 28 ± 31 公斤。百分位组成，颜色参数（L*、a* 和 b*)、剪切力、蒸煮损失和 pH 值是在腰最长肌肌肉。R:C 比和供水对评估变量之间没有交互作用。总增重、平均日增重和最终增重受限水和R:C比的影响。限水减少了总体重增加、平均日增加和最终体重。没有检测到限水对屠宰重量、百分含量、颜色变化、剪切力、pH、重量或屠体产量的影响。除了颈部重量外，没有观察到限制水和饮食对切口的影响。胴体重量和产量受 R:C 比率的影响。将供水限制在 0.5 不会影响 Santa Inês 杂交羔羊的胴体重量或产量或其肉质特征（百分含量、颜色、剪切力和 pH 值测量）。