An experiment was conducted to compare nutritional composition, the apparent ileal digestibility (AID) and the standardized ileal digestibility (SID) of soybean meals (SBM) produced in various countries. Five sources of SBM from China, Argentina, Brazil, and the U.S., and four meal sources from India were collected, analyzed for nutrients, and included in a cornstarch based diet in which SBM was the only amino acid (AA) contributing ingredient. An N-free diet was also formulated and fed. Twenty-five barrows weighing about 31 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 feeding periods.
Results indicated the concentration of crude protein was greater (P ‹ 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). The concentration of most indispensable AA followed the same pattern as crude protein with the exception of SBM from the U.S. contained significantly more (P ‹ 0.05) indispensable AA than SBM from China or Argentina. Greater (P ‹ 0.05) AID and SID of crude protein and most AA was observed in the U.S. SBM compared with SBM from Brazil, Argentina, and India. Due to the lower concentration of AA in SBM from China, the digestible AA in SBM from China was less (P ‹ 0.05) than in meal from the U.S. Soybean meal from the U.S. or Brazil had less (P ‹ 0.05) variability in SID values than meals produced in Argentina, China, or India. The researchers concluded that the SID of the soy protein and AA are dependent on the country where the SBM is produced. This difference and the variability within each country should be evaluated when formulating diets for weaning pigs.
Table 1. Concentration of energy, dry matter, and nutrients in soybean meal from China, Argentina, Brazil, the U.S., and India
Table 2. Apparent ileal digestibility of crude protein and amino acids in soybean meal from China, Argentina, Brazil, the U.S., and India (1)
Table 3. Standardized ileal digestibility of crude protein and amino acids in soybean meal from China, Argentina, Brazil, the U.S., and India1 (1, 2)
Table 4. Concentration of standardized ileal digestible crude protein and amino acids in soybean meal from China, Argentina, Brazil, the U.S., and India (1)
