Quadros Danilo G, Whitney Travis R, Kerth Chris R
Texas A&M AgriLife Research, 7887 U.S. Hwy 87 N, San Angelo, TX 76901, USA.
Department of Animal Science, Texas A&M University, College Station, TX 77843, USA.
Transl Anim Sci. 2022 Apr 13;6(2):txac040. doi: 10.1093/tas/txac040. eCollection 2022 Apr.
We evaluated the impacts of substituting cottonseed meal (CSM) and sorghum grain (SG) with dried distillers` grains with solubles (DDGS) in lamb feedlot diets on the dry matter intake (DMI), the growth performance, blood serum analysis, feces phosphorus (P) and nitrogen (N), wool production and quality, carcass traits, adipose tissue fatty acid (FA) profiles, and sensory panel tests. For 72 d, Rambouillet wether lambs ( = 44, initial body weight, BW = 28.8 ± 3.3 kg) were individually fed ad libitum pelleted diets containing DDGS that replaced 0% (0DDGS), 25% (25DDGS), 50% (50DDGS), or 75% (75DDGS) of the CSM and SG in a completely randomized design trial. Linear and quadratic effects of DDGS levels on the response variables were analyzed. Treatment × day interactions ( 0.001) were observed for BW and DMI. As the DDGS level was increased, DMI (from days 21 to 70), lamb BW (from days 56 to 70), average daily gain, blood urea nitrogen and P, and fecal P linearly increased ( ≤ 0.05). Fecal N quadratically increased ( 0.01), but no effects were found for gain:feed, blood insulin-like growth factor-1, or calcium. No differences in wool production or most of the wool quality parameters were detected. Adipose tissue stearic acid linearly increased ( 0.02), linoleic acid quadratically increased ( 0.01), and oleic acid tended to quadratically decrease ( = 0.08) as the DDGS increased in the diets. Increasing the DDGS level in the diets quadratically increased the hot carcass weight ( = 0.02), backfat thickness ( = 0.04), and body wall thickness ( < 0.001) while having no impact on the longissimus muscle area. As the DDGS increased in the diet, juiciness, tenderness, and overall acceptability linearly increased ( ≤ 0.05), while having no effect on the cook-loss, flavor intensity, or off-flavor detectability. Replacing 50% of CSM and SG with DDGS improved growth performance and enhanced the carcass and meat quality.
我们评估了在羔羊育肥日粮中用干酒糟及其可溶物（DDGS）替代棉籽粕（CSM）和高粱谷物（SG）对干物质摄入量（DMI）、生长性能、血清分析、粪便磷（P）和氮（N）、羊毛产量和质量、胴体性状、脂肪组织脂肪酸（FA）谱以及感官评定测试的影响。在一项完全随机设计试验中，对72天内的兰布耶阉公羊（n = 44，初始体重，BW = 28.8±3.3千克）单独自由采食含DDGS的颗粒饲料，DDGS替代了日粮中0%（0DDGS）、25%（25DDGS）、50%（50DDGS）或75%（75DDGS）的CSM和SG。分析了DDGS水平对响应变量的线性和二次效应。观察到BW和DMI存在处理×天数交互作用（P < 0.001）。随着DDGS水平的增加，DMI（第21至70天）、羔羊BW（第56至70天）、平均日增重、血尿素氮和P以及粪便P呈线性增加（P≤0.05）。粪便N呈二次增加（P < 0.01），但在增重：饲料比、血胰岛素样生长因子-1或钙方面未发现影响。在羊毛产量或大多数羊毛质量参数方面未检测到差异。随着日粮中DDGS的增加，脂肪组织硬脂酸呈线性增加（P < 0.02），亚油酸呈二次增加（P < 0.01），油酸呈二次下降趋势（P = 0.08）。日粮中DDGS水平的增加使热胴体重呈二次增加（P = 0.02）、背膘厚度呈二次增加（P = 0.04）、体壁厚度呈二次增加（P < 0.001），而对背最长肌面积无影响。随着日粮中DDGS的增加，多汁性、嫩度和总体可接受性呈线性增加（P≤0.05），而对烹饪损失、风味强度或异味可检测性无影响。用DDGS替代50%的CSM和SG可提高生长性能并改善胴体和肉质。
