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Abstract
Biochemical and nutritional properties of high-moisture sorghum grain treated with 1.5% propionic acid or 0.6 or 1.2% of a combination of 6 parts propionic acid and 2 parts each of acetic and benzoic acids were studied. Acid treatment increased the concentrations of reducing sugars (considered a non-enzymatic effect from lack of inherent diastatic activity) and several free amino acids, somewhat reduced the activity of alpha-amylase added to the grain, and increased the in vitro digestibility by pepsin-pancreatin of proteins in the grain. Tests using weanling rats showed no significant differences in protein efficiency ratios, relative nutritive values, or biological values of proteins from control and treated sorghum grains. Diets prepared with treated grain decreased absorption of iron in weanling rats.
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