Department of Animal Sciences, University of Illinois, Urbana, Illinois 61801, USA.
J Anim Sci. 2011 Dec;89(12):4109-15. doi: 10.2527/jas.2011-4143. Epub 2011 Aug 5.
The objectives of this experiment were to determine the apparent ileal digestibility and the standardized ileal digestibility (SID) of CP and AA in bakery meal, corn gluten meal, corn gluten feed, corn germ meal, and hominy feed and to compare these values with the apparent ileal digestibility and SID of CP and AA in corn and distillers dried grains with solubles (DDGS). Eight growing barrows (initial BW: 82.5 ± 5.5 kg) were randomly allotted to an 8 × 8 Latin square design with 8 diets and 8 periods. Diets contained corn, DDGS, bakery meal, corn gluten meal, corn gluten feed, corn germ meal, or hominy feed as the sole source of protein and AA. An N-free diet was used to measure basal endogenous losses of AA and protein. Pigs were fed experimental diets for eight 7-d periods, with ileal digesta being collected on d 6 and 7 of each period. Results indicated that the SID of Lys in corn gluten meal (78.7%) was greater (P < 0.01) than in DDGS, bakery meal, corn germ meal, and hominy feed (46.0, 48.4, 68.4, and 58.8%, respectively). The SID of all indispensable AA except Arg, Leu, and Met in bakery meal were not different from those in DDGS. The SID of Arg, His, Leu, and Met in corn gluten feed were less (P < 0.01) than in corn, but the SID of all other indispensable AA in corn gluten feed were not different from those in corn. However, for most indispensable AA, the SID in corn gluten feed was not different from the SID in DDGS. The SID of all indispensable AA in corn germ meal, except Arg, His, Leu, and Met, were not different from the SID in corn. Likewise, the SID of all indispensable AA in corn germ meal, except Arg and Leu, were not different from those in DDGS. The SID of Ile, Met, Phe, and Val in hominy feed were less (P < 0.01) than in corn, but the SID of the remaining indispensable AA in hominy feed were not different from the SID of indispensable AA in corn. All indispensable AA in hominy feed also had SID values that were not different from the SID values of AA in DDGS, except for Arg and Lys, which had greater (P < 0.01) SID than in DDGS. In conclusion, bakery meal had SID values of most AA that were less than in corn, but corn gluten meal had SID values for most AA that were greater than the SID of AA in corn, bakery meal, and corn coproducts.
本实验的目的是测定面包屑、玉米蛋白粉、玉米蛋白粉饲料、玉米胚芽粕和玉米DDGS 中 CP 和 AA 的真回肠消化率和标准回肠消化率（SID），并与玉米和玉米DDGS 中 CP 和 AA 的真回肠消化率和 SID 进行比较。8 头生长肥育猪（初始 BW：82.5±5.5kg）随机分为 8 个 8×8 拉丁方设计，有 8 种日粮和 8 个周期。日粮以玉米、DDGS、面包屑、玉米蛋白粉、玉米蛋白粉饲料、玉米胚芽粕或玉米 DDGS 为唯一蛋白质和 AA 来源。采用无氮日粮测定 AA 和蛋白质的基础内源性损失。猪在 8 个 7 天周期内饲喂试验日粮，在每个周期的第 6 和第 7 天收集回肠食糜。结果表明，玉米蛋白粉中 Lys 的 SID（78.7%）显著高于 DDGS、面包屑、玉米胚芽粕和玉米 DDGS（46.0、48.4、68.4 和 58.8%，分别）。除 Arg、Leu 和 Met 外，面包屑中所有必需 AA 的 SID 均与 DDGS 中的 SID 无显著差异。玉米蛋白粉饲料中 Arg、His、Leu 和 Met 的 SID 显著低于玉米（P<0.01），但玉米蛋白粉饲料中其他所有必需 AA 的 SID 与玉米中的 SID 无显著差异。然而，对于大多数必需 AA，玉米蛋白粉饲料的 SID 与 DDGS 的 SID 无显著差异。除 Arg、His、Leu 和 Met 外，玉米胚芽粕中所有必需 AA 的 SID 与玉米中的 SID 无显著差异。同样，玉米胚芽粕中除 Arg 和 Leu 外，所有必需 AA 的 SID 与 DDGS 中的 SID 无显著差异。玉米 DDGS 中 Ile、Met、Phe 和 Val 的 SID 显著低于玉米（P<0.01），但玉米 DDGS 中其余必需 AA 的 SID 与玉米中必需 AA 的 SID 无显著差异。除 Arg 和 Lys 外，玉米 DDGS 中所有必需 AA 的 SID 均高于玉米 DDGS，而玉米 DDGS 中除 Arg 和 Lys 外，所有必需 AA 的 SID 与玉米 DDGS 中必需 AA 的 SID 无显著差异。综上所述，面包屑中大多数 AA 的 SID 低于玉米，但玉米蛋白粉中大多数 AA 的 SID 高于玉米、面包屑和玉米 coproducts 中的 AA。
