Articles

The nutritional value assigned to soybean meal (SBM) in poultry diet formulation may be unreliable when commercial sources are assumed to be compositionally interchangeable. To compare proximate composition and potassium hydroxide (KOH) protein solubility across supplier-reported SBM origins received for feed-quality assessment in Karachi, Pakistan. Laboratory records containing six observations for each of four origins (Argentina, Brazil, South Africa, and the United States) were analyzed using one-way ANOVA. Moisture, ash, crude protein (CP), fat and fiber differed across origin categories (overall P ≤ 0.003), whereas KOH protein solubility did not (P = 0.368). The United States group had the greatest mean CP (46.06 ± 0.18%), while Brazilian SBM had the greatest moisture (10.86 ± 0.33%), ash (7.28 ± 0.44%), and crude fiber (6.27 ± 0.50%). KOH protein solubility means ranged from 78.62 to 79.38%. The recorded meals exhibited origin-associated differences in routine nutrient composition, supporting analysis of incoming commercial batches rather than reliance on origin alone. Statistical inferences remain provisional until the independence of the six observations per origin is verified; neither nutrient digestibility nor storage-related stability was measured longitudinally.