Opapeju F O, Golian A, Nyachoti C M, Campbell L D
Department of Animal Science, University of Manitoba, Winnipeg, R3T 2N2, Canada.
J Anim Sci. 2006 May;84(5):1130-7. doi: 10.2527/2006.8451130x.
The digestibility of AA in dry extruded-expelled soybean meal (DESBM) and regular, solvent-extracted soybean meal (SBM) were determined in pigs and poultry. In the pig assay, 4 Cotswold barrows (average initial BW of 80.4 kg) fitted with a T-cannula at the distal ileum were allotted to 4 semipurified diets in a 4 x 4 Latin square design. Diet 1, a low protein diet (5% casein), was used to quantify endogenous CP and AA losses. Diets 2, 3, and 4 were formulated to contain 35% regular, solvent-extracted SBM; batch 1 of DESBM (DESBM-1); and batch 2 of DESBM (DESBM-2), respectively, as the sole source of protein. The DESBM samples were obtained from 2 different batches but were subjected to the same processing conditions. Chromic oxide (0.3%) was included as a digestibility marker in all diets. Compared with DESBM-1 and DESBM-2, apparent ileal digestibility of DM in SBM was greater (P < 0.05). Apparent and true ileal digestibilities of AA in SBM were greater (P < 0.05) compared with DESBM-2. In the poultry assay, 4 dietary treatments were each assigned to adult cecectomized roosters in a completely randomized design. Treatment 1 was a nonnitrogenous diet (NND; 90% sucrose and 10% vegetable oil) used to estimate endogenous N and AA losses. Treatments 2, 3, and 4 contained SBM, DESBM-1, and DESBM-2 as the only source of protein. Each of these diets was fed in 25-g quantities formulated to provide 5 g of CP from the respective soybean meal source. The SBM had greater (P < or = 0.05) true digestibility for isoleucine, leucine, cysteine, proline, serine, and tyrosine compared with DESBM-1. The results indicate that, relative to regular, solvent-extracted soybean meal, AA digestibilities of different batches of dry extruded-expelled soybean meal varied in pigs and poultry.
在猪和家禽中测定了干挤压膨化豆粕（DESBM）和常规溶剂浸出豆粕（SBM）中氨基酸的消化率。在猪的试验中，将4头装有回肠末端T型套管的科茨沃尔德公猪（初始平均体重80.4千克）按照4×4拉丁方设计分配到4种半纯化日粮中。日粮1是低蛋白日粮（5%酪蛋白），用于量化内源粗蛋白和氨基酸损失。日粮2、3和4分别配制为含有35%常规溶剂浸出豆粕、第1批DESBM（DESBM-1）和第2批DESBM（DESBM-2）作为唯一蛋白质来源。DESBM样品取自2个不同批次，但经过相同的加工条件。所有日粮中均添加了0.3%的氧化铬作为消化率标记物。与DESBM-1和DESBM-2相比，SBM中干物质的表观回肠消化率更高（P<0.05）。与DESBM-2相比，SBM中氨基酸的表观和真回肠消化率更高（P<0.05）。在家禽试验中，采用完全随机设计将4种日粮处理分别分配给成年切除盲肠的公鸡。处理1是无氮日粮（NND；90%蔗糖和10%植物油），用于估计内源氮和氨基酸损失。处理2、3和4分别含有SBM、DESBM-1和DESBM-2作为唯一蛋白质来源。这些日粮均以25克的量投喂，配制为从各自的豆粕来源提供5克粗蛋白。与DESBM-1相比，SBM对异亮氨酸、亮氨酸、半胱氨酸、脯氨酸、丝氨酸和酪氨酸具有更高（P≤0.05）的真消化率。结果表明，相对于常规溶剂浸出豆粕，不同批次的干挤压膨化豆粕在猪和家禽中的氨基酸消化率有所不同。
