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Gastric Digestion of Soybean Flour^*

Dairy Husbandry Subsection, Iowa Agricultural Experiment Station

ABSTRACT

A soybean gruel made by mixing one part of soybean flour with nine parts of water was compared with whole and skim milk for calf feeding. A "fortified" soybean gruel in which skim milk solids made up one third of the total solids of the gruel was also tried. The results were analyzed in terms of (1) cubic centimeters of gastric juice collected by half hour periods from Pavlov pouches and (2) free and total acidity of the gastric contents. The amount of gastric juice secreted was approximately the same in both the milk and the soybean gruel trials. The data tend to confirm the belief that the soybean flour-water mixture leaves the stomach more rapidly than the milk curd. The data do not furnish the answer to the question of why calves do not thrive on a soybean gruel but they do indicate that it is not due to a diminished gastric secretion.

^* Journal Paper No. J357 of the Iowa Agricultural Experiment Station. Ames, Iowa. Project No. 47.