Soybean expellers may be produced by dry extrusion and mechanical oil pressing of soybeans, but there is limited information about the nutritional value of expellers produced via this procedure. Therefore, 2 experiments were conducted to test the hypothesis that standardized ileal digestibility (SID) of crude protein (CP) and amino acids (AA), apparent total tract digestibility (ATTD) of energy and total dietary fiber (TDF), and concentrations of digestible energy (DE), metabolizable energy (ME), and net energy (NE) are greater in soybean expellers than in soybean meal (SBM) when fed to growing pigs. Pigs were the offspring of Line 359 boars mated to Camborough females (Pig Improvement Company, Hendersonville, TN). In Exp. 1, nine growing barrows (initial body weight: 55.98 kg ± 13.75 kg) with T-cannulas installed in the distal ileum were allotted to 1 of 3 diets using a triplicated 3 × 3 Latin square design with 3 periods. Two diets were formulated to contain 35% soybean expellers or 33% SBM as the sole source of AA. A nitrogen-free diet was used to determine basal endogenous losses of AA from the pigs. Ileal digesta were collected on d 6 and 7 of each 7-d period. Results indicated that the SID of most indispensable and dispensable AA were greater (P < 0.05) or tended (P < 0.10) to be greater in soybean expellers than in SBM. In Exp. 2, a corn-based diet and 2 diets based on corn and each of the 2 soybean products were formulated. Twenty-four growing barrows (initial body weight: 44.88 kg ± 2.17 kg) were allotted to 1 of the 3 diets with 8 pigs per diet. Urine and fecal samples were collected for 4 d after 5 d of adaptation. Results indicated that the ATTD of energy and TDF was not different between soybean expeller and SBM, but the ATTD of TDF in the 2 soybean products was greater (P < 0.05) than in corn. Concentrations of DE and ME in soybean expellers were greater (P < 0.05) compared with corn or SBM. Soybean expellers had greater (P < 0.05) calculated NE compared with SBM, but there was no difference in NE between corn and soybean expellers. In conclusion, values for SID of most AA and DE, ME, and NE in soybean expellers were greater than in SBM.

中文翻译：

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当饲喂生长猪时，高剪切干大豆压榨机中的氨基酸消化率以及代谢能和净能浓度高于豆粕。


大豆压榨机可以通过大豆的干挤压和机械榨油来生产，但是关于通过该过程生产的压榨机的营养价值的信息有限。因此，进行了 2 个实验来检验以下假设：粗蛋白 ( CP ) 和氨基酸 ( AA ) 的标准化回肠消化率 ( SID )、能量和总膳食纤维 ( TDF ) 的表观总消化道消化率 ( ATTD ) 以及当饲喂生长猪时，大豆压榨机的消化能 ( DE )、代谢能 ( ME ) 和净能 ( NE ) 高于豆粕 ( SBM )。猪是 359 系公猪与坎伯勒母猪交配的后代（猪改良公司，亨德森维尔，田纳西州）。在Exp。如图 1 所示，将 9 只在回肠末端安装了 T 形插管的生长阉猪（初始体重：55.98 kg ± 13.75 kg）分配给 3 个日粮中的 1 个，使用三重 3 × 3 拉丁方设计，分 3 个周期。配制了两种日粮，其中含有 35% 大豆压榨机或 33% SBM 作为 AA 的唯一来源。使用无氮日粮来测定猪的 AA 基础内源损失。在每个 7 天周期的第 6 和 7 天收集回肠食糜。结果表明，大豆压榨机中大多数必需和非必需AA的SID均大于（ P < 0.05）或倾向于（ P < 0.10）大于SBM。在Exp。 2、配制一种基于玉米的饮食和两种基于玉米和两种大豆产品的饮食。生长中的手推车24只（初始体重：44.88公斤±2.17 公斤）被分配给 3 个日粮中的 1 个，每个日粮 8 头猪。适应5天后收集4天的尿液和粪便样本。结果表明，大豆压榨机和豆粕中能量和TDF的ATTD没有差异，但2种豆制品中TDF的ATTD均大于玉米（ P < 0.05）。与玉米或豆粕相比，大豆压榨机中 DE 和 ME 的浓度更高（ P < 0.05）。与SBM相比，大豆压榨机具有更大的计算NE（ P <0.05），但玉米和大豆压榨机之间的NE没有差异。总之，大豆压榨机中大多数 AA 和 DE、ME 和 NE 的 SID 值均大于 SBM。