Lagos L V, Stein H H
J Anim Sci. 2017 Apr;95(4):1626-1636. doi: 10.2527/jas.2017.1440.
An experiment was conducted to compare nutritional composition of soybean meal (SBM) produced in China, Argentina, Brazil, the U.S., or India and the apparent ileal digestibility (AID) and the standardized ileal digestibility (SID) of CP and AA in these SBM when fed to growing pigs. Five sources of SBM from China, Argentina, Brazil, and the U.S., and 4 sources from India were collected for a total of 24 sources of SBM. All samples were analyzed for energy, DM, and nutrients, and each source was included in a cornstarch based diet in which SBM was the only AA contributing ingredient. An N-free diet was also formulated. Twenty-five barrows (initial BW: 30.53 ± 1.73 kg) were equipped with a T-cannula in the distal ileum and randomly allotted to a 25 × 8 Youden square design with 25 diets and 8 periods. Results indicate that the concentration of CP was greater ( < 0.05) in SBM from Brazil and India (49.3 and 49.5%, respectively) than in SBM from China, Argentina, or the U.S. (45.1, 46.7, and 47.3%, respectively, as-fed basis). The concentration of most indispensable AA followed the same pattern as CP with the exception that SBM from the U.S. contained more ( < 0.05) indispensable AA than SBM from China or Argentina. However, SBM from India contained more ( < 0.05) trypsin inhibitors than SBM from the other countries. A greater ( < 0.05) AID and SID of CP and most AA was observed in SBM from the U.S. compared with SBM from Brazil, Argentina, and India, but there were no differences between SBM from the U.S. and SBM from China. However, because of the lower concentration of AA in SBM from China, the concentration of standardized ileal digestible AA in SBM from China was less ( < 0.05) than in SBM from the U.S. Soybean meal from the U.S. or Brazil had less ( < 0.05) variability in SID values than SBM from Argentina, China, or India. In conclusion, the SID of CP and AA is dependent on the country where the SBM is produced. This difference and the variability within each country should be evaluated when formulating diets for pigs.
进行了一项实验，比较中国、阿根廷、巴西、美国或印度生产的豆粕的营养成分，以及将这些豆粕喂给生长猪时粗蛋白（CP）和氨基酸（AA）的表观回肠消化率（AID）和标准回肠消化率（SID）。收集了来自中国、阿根廷、巴西和美国的5种豆粕来源以及来自印度的4种豆粕来源，共计24种豆粕。对所有样品进行能量、干物质和营养成分分析，每种来源都包含在以玉米淀粉为基础的日粮中，其中豆粕是唯一的氨基酸供应成分。还配制了无氮日粮。25头公猪（初始体重：30.53±1.73千克）在回回回回肠末端安装了T型套管，并随机分配到一个25×8的尤登方设计中，有25种日粮和8个时间段。结果表明，巴西和印度豆粕中的CP浓度（P<0.05）高于中国、阿根廷或美国的豆粕（分别为49.3%和49.5%，以饲喂基础计），中国、阿根廷和美国的豆粕CP浓度分别为45.1%、46.7%和47.3%。大多数必需氨基酸的浓度与CP的模式相同，但美国豆粕中的必需氨基酸含量（P<0.05）高于中国或阿根廷的豆粕。然而，印度豆粕中的胰蛋白酶抑制剂含量（P<0.05）高于其他国家的豆粕。与巴西、阿根廷和印度的豆粕相比，美国豆粕中CP和大多数氨基酸的AID和SID更高（P<0.05），但美国豆粕和中国豆粕之间没有差异。然而，由于中国豆粕中氨基酸浓度较低，中国豆粕中标准回肠可消化氨基酸的浓度低于美国豆粕（P<0.05）。美国或巴西的豆粕SID值的变异性低于阿根廷、中国或印度的豆粕（P<0.05）。总之，CP和氨基酸的SID取决于豆粕的生产国。在为猪配制日粮时，应评估每个国家内部的这种差异和变异性。
