Department of Animal Sciences, University of Illinois at Urbana-Champaign, IL 61801, USA.
APC LLC, Ankeny, IA 50021, USA.
Poult Sci. 2022 May;101(5):101807. doi: 10.1016/j.psj.2022.101807. Epub 2022 Feb 25.
Four experiments were conducted to determine ME and amino acid (AA) digestibility of spray-dried animal plasma (SDAP) and soybean meal (SBM). The 48-h precision-fed adult rooster assay was used in 2 experiments; TME and standardized AA digestibility were determined using conventional and cecectomized roosters, respectively, 50 weeks of age and weighing approximately 2,200 g. Eight individually-caged roosters (4 per diet) were fasted for 26 h, then precision-fed 30 g of SDAP mixture (containing 50% corn) or SBM mixture (containing 50% corn). The TME and AA digestibility for SDAP and SBM were calculated by the difference procedure. The TME for SDAP was greater (P < 0.05) than SBM (3,743 and 2,669 kcal/kg DM, respectively). Similarly, mean AA digestibility of SDAP was greater (P < 0.05) than SBM (94 and 86%, respectively). Two assays were conducted using Ross male broilers to determine AME and apparent (AIAAD) and standardized (SIAAD) ileal AA digestibility of SDAP and SBM. A 3 × 2 factorial arrangement of treatments was used to determine AME; 126 chicks (6 replicate pens of 7 chicks) were fed a corn-SBM-based reference diet, a diet containing 30% SDAP, or a diet containing 30% SBM from d 7 to 10 and 18 to 21. A 2 × 2 factorial arrangement of treatments was used to determine AIAAD and SIAAD; 168 chicks (12 replicate pens of 7 chicks) were fed a semi-purified diet containing 25% SDAP or a semi-purified, isonitrogenous diet containing 41% SBM from d 7 to 10 and 18 to 21. The AME for SDAP was greater (P < 0.05) than SBM at d 10 (3,851 and 2,089 kcal/kg DM, respectively) and d 21 (4,239 and 2,849 kcal/kg DM, respectively). The second assay showed an increase (P < 0.05) in AIAAD and SIAAD for SDAP compared with SBM at d 10 (mean SIAAD for SDAP and SBM were 96% and 84%, respectively) and d 21 (97% and 87%, respectively). Regardless of assay or age, these results indicate SDAP is a highly digestible feed ingredient with high ME and AA digestibility.
进行了四项实验以确定喷雾干燥动物血浆（SDAP）和大豆粉（SBM）的 ME 和氨基酸（AA）消化率。在两项实验中使用了 48 小时精确喂养成年公鸡测定法；使用常规和盲肠切除公鸡分别测定 TME 和标准化 AA 消化率，鸡龄为 50 周，体重约为 2200 克。将 8 只单独笼养的公鸡（每饲料 4 只）禁食 26 小时，然后分别精确喂养 30 克 SDAP 混合物（含 50%玉米）或 SBM 混合物（含 50%玉米）。通过差值法计算 SDAP 和 SBM 的 TME 和 AA 消化率。SDAP 的 TME 高于 SBM（分别为 3743 和 2669 千卡/千克 DM）（P < 0.05）。同样，SDAP 的平均 AA 消化率高于 SBM（分别为 94%和 86%）（P < 0.05）。使用罗斯雄性肉鸡进行了两项测定，以确定 SDAP 和 SBM 的代谢能（AME）和表观（AIAAD）和标准化（SIAAD）回肠 AA 消化率。采用 3×2 因子处理安排来确定 AME；126 只小鸡（6 个重复笼 7 只小鸡）饲喂基于玉米-SBM 的参考饲料、含 30% SDAP 的饲料或含 30% SBM 的饲料，从第 7 天到第 10 天和第 18 天到第 21 天。采用 2×2 因子处理安排来确定 AIAAD 和 SIAAD；168 只小鸡（12 个重复笼 7 只小鸡）饲喂含 25% SDAP 的半纯化饲料或含 41% SBM 的半纯化、等氮饲料，从第 7 天到第 10 天和第 18 天到第 21 天。SDAP 的 AME 高于 SBM（P < 0.05），第 10 天（分别为 3851 和 2089 千卡/千克 DM）和第 21 天（分别为 4239 和 2849 千卡/千克 DM）。第二项测定表明，与 SBM 相比，SDAP 的 AIAAD 和 SIAAD 增加（P < 0.05），第 10 天（SDAP 和 SBM 的平均 SIAAD 分别为 96%和 84%）和第 21 天（分别为 97%和 87%）。无论测定方法或年龄如何，这些结果表明 SDAP 是一种高度可消化的饲料成分，具有高 ME 和 AA 消化率。
