This study aimed to evaluate the effect of feeding growing Awassi lambs on sweet lupin (LUP; Lupinus angustifolius) on nutrient intake, in vivo digestibility, growth performance and carcass quality. Twenty-seven lambs (average body weight (BW) 16.5 ± 0.88 kg) were assigned randomly to 3-diet groups, namely:1) no LUP (CON), 2) 125 g/kg LUP (LUP125) or 250 g/kg (LUP250) dry matter (DM) in replacement of portion of barley grain and soybean meal. The study lasted for 84 days (first 7 days were used as adaptation period followed by 77 days to collect the data). Nutrient intake was measured daily. Lambs’ BW was measured at the commencement of the study and every two weeks during the whole study. On day 60, 15 lambs (5 from each group) were chosen at random and moved to metabolism cages to determine nutrient in vivo digestibility and N balance parameters. Lambs fed LUP250 showed greater (P ≤ 0.05) intakes of DM, crude protein and ether extract than the CON and LUP125 fed groups; however, their NDF data tended (P = 0.07) to surpass other groups. Intake of metabolizable energy was greater (P = 0.02) in lupin-containing diets than the CON diet. Lambs’ fed LUP250 diet had greater (P < 0.05) total gain and average daily gain than the CON diet. In vivo digestibilities, N retention, carcass characteristics of longissimus muscle linear dimensions and cooking loss was not affected by treatment. The CON-fed lambs had the highest (P < 0.001) water holding capacity followed by the LUP250 and LUP125 groups. The whiteness (L*) and yellowness (b*) were lower (P ≤ 0.05) for the LUP125 diet than the CON and LUP250 diets. From the study, it can be concluded that the inclusion of sweet lupin at 250 g/kg DM improved the growing performance without affecting carcass characteristics of lambs.

本研究旨在评估饲养生长的 Awassi 羔羊对甜羽扇豆 (LUP; Lupinus angustifolius )体内营养摄入的影响消化率、生长性能和胴体质量。27 只羔羊（平均体重 (BW) 16.5 ± 0.88 kg）被随机分配到 3 个饮食组，即：1) 无 LUP (CON)，2) 125 g/kg LUP (LUP125) 或 250 g/kg (LUP250) 干物质 (DM) 代替部分大麦谷物和豆粕。该研究持续了 84 天（前 7 天用作适应期，随后 77 天用于收集数据）。每天测量营养摄入。在研究开始时和整个研究期间每两周测量羔羊的体重。在第 60 天，随机选择 15 只羔羊（每组 5 只）并移至代谢笼以确定体内营养消化率和氮平衡参数。与 CON 和 LUP125 饲喂组相比，饲喂 LUP250 的羔羊表现出更多 (P ≤ 0.05) DM、粗蛋白和乙醚提取物的摄入量；然而，他们的 NDF 数据往往（P = 0.07）超过其他组。含羽扇豆饮食的代谢能摄入量高于 CON 饮食（P = 0.02）。羔羊饲喂 LUP250 饮食的总增重和平均日增重高于 CON 饮食（P < 0.05）。最长肌的体内消化率、氮保留量、胴体特性肌肉线性尺寸和烹饪损失不受治疗影响。CON 喂养的羔羊具有最高的持水能力（P < 0.001），其次是 LUP250 和 LUP125 组。LUP125 日粮的白度 (L*) 和黄度 (b*) 低于 CON 和 LUP250 日粮（P ≤ 0.05）。从研究中可以得出结论，添加 250 g/kg DM 的甜羽扇豆在不影响羔羊胴体特性的情况下提高了生长性能。