In a randomized design study, lambs were individually fed with ad libitum access to 70.9% concentrate diets for 56 d in individual pens. The positive control diet (CNTL) contained cottonseed meal (CSM), sorghum grain, and cottonseed hulls, but no dried distillers’ grains with solubles (DDGS). Four treatment diets were similar to CNTL but did not contain CSM. Corn DDGS replaced 0% (0DDGS), 33% (33DDGS), 66% (66DDGS), or 100% (100DDGS) of the sorghum grain in the treatment diets. At 48-h postmortem, the longissimus muscle (LM) was removed from the carcass, cut into chops, frozen, thawed, cooked, and evaluated by a trained sensory panel. Lambs fed CNTL were compared with 0DDGS using contrasts and linear and quadratic effects were evaluated among the four DDGS diets. Lambs fed CNTL had greater (P ≤ 0.03) hot carcass weight (HCW) and LM area than lambs fed 0DDGS. As DDGS incrementally replaced sorghum grain, marbling linearly decreased (P = 0.03), LM area tended to linearly increase (P = 0.06), and skeletal maturity tended to linearly decrease (P = 0.06). As DDGS incrementally replaced sorghum grain, flavor attributes quadratically increased to 33DDGS then decreased (brown, roasted, umami; P ≤ 0.03), quadratically decreased to 33DDGS then increased (metallic; P = 0.004), or linearly decreased (lamb flavor identity; P = 0.03). Volatile aroma compounds 2-(hexyloxy)-ethanol decreased and 2,3-octanedione and methyl pyrazine increased quadratically with an increase in DDGS (P < 0.05). Additionally, 2-heptenal, heptanal, and 2-pentyl furan increased linearly, while 2-butanone decreased linearly as DDGS increased in the diet (P < 0.05). Results indicate that carcass and sensory characteristics and volatile aroma compounds are not negatively affected, in fact brown, roasted, and umami flavors are enhanced, when 33% DDGS replaces CSM and sorghum grain in Dorper lamb feedlot diets.

中文翻译：

---

用玉米干酒糟替代羊肉饲养场日粮中的可溶物来代替棉籽粉和高粱谷物：car体，训练有素的感官面板和挥发性香气化合物特性。

在一项随机设计研究中，单独给羊羔单独喂饲70.9％浓缩饲料，持续56天。阳性对照饮食（CNTL）包含棉籽粕（CSM），高粱谷物和棉籽壳，但不含干燥的酒糟含可溶物（DDGS）。四种治疗饮食与CNTL相似，但不含CSM。在治疗饮食中，玉米DDGS替代了高粱谷物的0％（0DDGS），33％（33DDGS），66％（66DDGS）或100％（100DDGS）。死后48小时，长肌（LM将其从the体上取下，切成小块，冷冻，解冻，煮熟，并由训练有素的感官小组进行评估。使用对比剂将饲喂CNTL的羔羊与0DDGS进行比较，并评估四种DDGS日粮中的线性和二次效应。馈送CNTL羊羔具有更大的（P ≤0.03）热胴体重（HCW）和LM面积大于供给羔羊0DDGS。随着DDGS逐渐取代高粱籽粒，大理石花纹线性减少（P = 0.03），LM面积倾向于线性增加（P = 0.06），而骨骼成熟度倾向于线性减少（P = 0.06）。随着DDGS逐渐取代高粱谷物，风味属性由原来的平方增加到33DDGS，然后下降（棕色，烤的，鲜味的；P≤0.03），二次下降至33DDGS，然后上升（金属；P = 0.004），或线性下降（羊肉风味相同；P = 0.03）。随着DDGS的增加，挥发性香气化合物2-（己氧基）-乙醇减少，而2,3-辛二酮和甲基吡嗪则增加（P <0.05）。另外，随着日粮中DDGS的增加，2-庚醛，庚醛和2-戊基呋喃呈线性增加，而2-丁酮呈线性下降（P <0.05）。结果表明，当33％DDGS替代多珀羔羊饲养场日粮中的CSM和高粱谷物时，car体和感官特性以及挥发性香气化合物不会受到负面影响，实际上会增强褐色，烤制和鲜味。