Jacela J Y, Frobose H L, DeRouchey J M, Tokach M D, Dritz S S, Goodband R D, Nelssen J L
Food Animal Health and Management Center, Kansas State University, Manhattan, 66506, USA.
J Anim Sci. 2010 Nov;88(11):3617-23. doi: 10.2527/jas.2010-3098. Epub 2010 Jul 23.
A study was conducted to determine the AA digestibility and energy concentration of a specialized high-protein corn distillers dried grains (HPC-DDG) product and a high-protein sorghum dried distillers grains with solubles (HPS-DDGS) product. Six growing barrows (BW = 22.7 kg) were surgically fitted with T-cannulas at the terminal ileum and allotted randomly to 3 treatments in a crossover design with 3 periods. The treatment diets were 1) 67% HPC-DDG and 2) 50% HPS-DDGS as the sole protein sources, and 3) an N-free diet for determining basal endogenous AA loss. All diets contained 0.25% chromic oxide as an inert marker. Digesta and fecal samples were collected and analyzed for AA and energy concentrations. After chemical analysis, standardized and apparent ileal digestible (SID and AID, respectively) AA and GE were determined for each coproduct. The DE, ME, and NE values for HPC-DDG and HPS-DDGS also were calculated. The chemical composition of HPC-DDG and HPS-DDGS on a DM basis was 40.8% CP, 5.4% fat, 22.9% ADF, 36.6% NDF, 0.04% Ca, and 0.42% P and 48.2% CP, 3.1% fat, 17.5% ADF, 20.4% NDF, 0.13% Ca, and 0.82% P, respectively. The DM content of HPC-DDG and HPS-DDGS was 89.50 and 91.88%, respectively. Analyzed AA content of HPC-DDG was greater than that of traditional corn DDGS. The Lys content of HPC-DDG was 1.36% (DM basis), resulting in a Lys-to-CP ratio of 3.2%. In HPS-DDGS, most AA were present in greater proportions than in HPC-DDG or conventional sorghum DDGS. The HPS-DDGS Lys content was 1.7% (DM basis), equivalent to a Lys-to-CP ratio of 3.5%. In HPC-DDG, the AID for Lys, Met, Thr, and Trp were 65.9 ± 1.7, 87.0 ± 1.9, 72.8 ± 3.4, and 76.2% ± 3.5, respectively, and SID values were 67.8 ± 1.7, 87.5 ± 1.9, 75.0 ± 3.5, and 78.6 ± 3.7%, respectively. For HPS-DDGS, the AID for Lys, Met, Thr, and Trp were 51.9 ± 5.3, 73.0 ± 3.1, 60.6 ± 5.3, and 71.7 ± 3.4%, respectively, and SID values were 53.7 ± 4.9, 73.8 ± 3.0, 63.0 ± 4.9, and 73.8 ± 3.0%, respectively. The GE, DE, and calculated ME and NE values were 5,293, 3,703 ± 121, 3,426 ± 121, and 2,131 ± 88 kcal/kg of DM, respectively, for HPC-DDG and 5,108, 3,878, 3,549, and 2,256 kcal/kg of DM, respectively, for HPS-DDGS. Results indicate that both coproducts are well suited for use in swine diets and that actual AA digestibility values and calculated energy concentrations can now be used in swine diet formulation.
开展了一项研究，以测定一种特制的高蛋白玉米干酒糟（HPC-DDG）产品和一种高蛋白高粱干酒糟及其可溶物（HPS-DDGS）产品的氨基酸消化率和能量浓度。选用6头生长育肥猪（体重22.7千克），在回肠末端手术安装T型瘘管，并采用交叉设计，随机分为3组，每组3个阶段。处理日粮分别为：1）67%的HPC-DDG和2）50%的HPS-DDGS作为唯一蛋白质来源，3）无氮日粮用于测定基础内源氨基酸损失。所有日粮均含有0.25%的氧化铬作为惰性标记物。收集消化物和粪便样本，分析氨基酸和能量浓度。经过化学分析后，测定了每种副产物的标准化回肠可消化氨基酸（SID）和表观回肠可消化氨基酸（AID）以及总能（GE）。还计算了HPC-DDG和HPS-DDGS的消化能（DE）、代谢能（ME）和净能（NE）值。以干物质计，HPC-DDG和HPS-DDGS的化学成分分别为：粗蛋白40.8%、脂肪5.4%、酸性洗涤纤维22.9%、中性洗涤纤维36.6%、钙0.04%、磷0.42%，以及粗蛋白48.2%、脂肪3.1%、酸性洗涤纤维17.5%、中性洗涤纤维20.4%、钙0.13%、磷0.82%。HPC-DDG和HPS-DDGS的干物质含量分别为89.50%和91.88%。分析得出HPC-DDG的氨基酸含量高于传统玉米干酒糟。HPC-DDG的赖氨酸含量为1.36%（干物质计），赖氨酸与粗蛋白的比例为3.2%。在HPS-DDGS中，大多数氨基酸的比例高于HPC-DDG或传统高粱干酒糟。HPS-DDGS的赖氨酸含量为1.7%（干物质计），相当于赖氨酸与粗蛋白的比例为3.5%。在HPC-DDG中，赖氨酸、蛋氨酸、苏氨酸和色氨酸的表观回肠消化率分别为65.9±1.7%、87.0±1.9%、72.8±3.4%和76.2±3.5%，标准化回肠消化率分别为67.8±1.7%、87.5±1.9%、75.0±3.5%和78.6±3.7%。对于HPS-DDGS，赖氨酸、蛋氨酸、苏氨酸和色氨酸的表观回肠消化率分别为51.9±5.3%、73.0±3.1%、60.6±5.3%和71.7±3.4%，标准化回肠消化率分别为53.7±4.9%、73.8±3.0%、63.0±4.9%和73.8±(3.0%)。HPC-DDG的总能、消化能以及计算得出的代谢能和净能值分别为5293、3703±121、3426±121和2131±88千卡/千克干物质，HPS-DDGS的相应值分别为5108、3878、3549和2256千卡/千克干物质。结果表明，这两种副产物都非常适合用于猪日粮，并且实际氨基酸消化率值和计算得出的能量浓度现在可用于猪日粮配方设计。
