Department of Animal Sciences, University of Illinois, Urbana, IL.
J Anim Sci. 2018 May 4;96(5):1869-1876. doi: 10.1093/jas/sky052.
Two experiments were conducted to determine the standardized ileal digestibility (SID) of CP and AA, apparent total tract digestibility (ATTD) of GE, and DE and ME in conventional distillers dried grains with solubles (DDGS-CV) and in a novel source of high-protein distillers dried grains with solubles (DDGS-HP) produced by Lincolnway Energy (Nevada, IA). In Exp. 1, 18 barrows (initial BW: 72.47 ± 9.16 kg) that had a T-cannula installed in the distal ileum were allotted to a completely randomized design with 3 diets and 6 replicate pigs per diet. A nitrogen-free diet and 2 diets that contained cornstarch and DDGS-CV or DDGS-HPLincolnway as the sole source of CP and AA were formulated. Diets were fed to pigs for 7 d, and ileal digesta were collected on days 6 and 7 of each period. The SID for Leu, Lys, Met, Phe, and Glu was greater (P < 0.05) in DDGS-HPLincolnway than in DDGS-CV, and the SID of Ile, Val, and total indispensable AA, as well as the SID of Tyr, tended to be greater (P < 0.10) in DDGS-HPLincolnway than in DDGS-CV. No difference between DDGS-CV and DDGS-HPLincolnway was observed for the SID of CP and all other AA. In Exp. 2, 24 barrows (initial BW: 52.80 ± 2.55 kg) were housed individually in metabolism crates and randomly allotted to 1 of 3 diets. A corn-based basal diet (97.25% corn) and 2 diets that contained corn and DDGS-CV or corn and DDGS-HPLincolnway were formulated. Each diet was fed to 8 pigs. Feces and urine were collected using the marker to marker approach with 7-d adaptation and 5-d collection periods. The DE and ME in DDGS-CV and DDGS-HPLincolnway were calculated using the difference procedure. The DE and ME in DDGS-HPLincolnway on an as-fed basis were greater (P < 0.05) than in corn and DDGS-CV, but the ATTD of GE in DDGS-HPLincolnway and DDGS-CV was less (P < 0.01) than in corn. In conclusion, the SID of some AA and the DE and ME in DDGS-HPLincolnway were greater than in DDGS-CV.
进行了两项实验，以确定常规纤维干燥酒糟（DDGS-CV）和新型高蛋白纤维干燥酒糟（DDGS-HP）Lincolnway 中 CP 和 AA 的标准回肠可消化率（SID）、GE 的表观全肠道消化率（ATTD）以及 DE 和 ME。在实验 1 中，18 头安装有回肠 T 型管的阉公猪（初始 BW：72.47±9.16kg），按照 3 种日粮和 6 个重复每日粮的完全随机设计进行分配。配制了一种无氮日粮和两种含有玉米淀粉和 DDGS-CV 或 DDGS-HPLincolnway 的日粮，作为 CP 和 AA 的唯一来源。日粮喂给猪 7d，在每个时期的第 6 和第 7 天收集回肠内容物。与 DDGS-CV 相比，DDGS-HPLincolnway 中 Leu、Lys、Met、Phe 和 Glu 的 SID 更高（P<0.05），DDGS-HPLincolnway 中 Ile、Val 和总必需 AA 的 SID 以及 Tyr 的 SID 也更高（P<0.10）。DDGS-CV 和 DDGS-HPLincolnway 之间的 CP SID 和所有其他 AA 的 SID 没有差异。在实验 2 中，24 头阉公猪（初始 BW：52.80±2.55kg）单独饲养在代谢笼中，并随机分配到 3 种日粮中的 1 种。配制了一种基于玉米的基础日粮（97.25%玉米）和两种含有玉米和 DDGS-CV 或玉米和 DDGS-HPLincolnway 的日粮。每种日粮喂给 8 头猪。采用标记到标记法，经过 7d 的适应期和 5d 的收集期，收集粪便和尿液。用差减法计算 DDGS-CV 和 DDGS-HPLincolnway 的 DE 和 ME。DDGS-HPLincolnway 的 DE 和 ME 基于实际喂养量时，高于玉米和 DDGS-CV（P<0.05），但 DDGS-HPLincolnway 和 DDGS-CV 的 GE 的 ATTD 低于玉米（P<0.01）。总之，与 DDGS-CV 相比，DDGS-HPLincolnway 中一些 AA 的 SID 和 DE 和 ME 更高。
