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Effect of Processing Temperature on Utilization of Whole Soybeans by Calves^{1, 2,}

Departments of Animal Sciences and Industry, Statistics, and Grain Science and Industry, Kansas State University, Manhattan 66506

ABSTRACT

To evaluate utilization of processed whole soybeans by calves, in the first trial raw soybeans and soybeans processed at 138°C without tempering or 138°C with tempering, or at 171°C were evaluated in a nitrogen balance trial of four male Holstein calves 10 to 15 wk of age. Nitrogen retention was similar when calves consumed any of the heat-treated soybean diets but less for the raw soybean diet.

In the second trial raw and processed soybeans were evaluated in an 8-wk growth trial of 96 Holstein day-old calves. Starters contained soybean meal, that with added fat, raw soybeans, or soybeans processed at 138, 171, or 191°C in a California Pellet Mill Jet-Sploder. Calves consuming the starters containing soybeans processed at 171°C consumed more feed, gained faster, had lower fecal scores (less scours), and less mortality.

¹ Contribution 84-334-J, Kansas Agricultural Experiment Station, Manhattan 66506.

² Supported in part by California Pellet Mill Co., San Francisco, CA.

³ Department of Dairy Science, Louisiana State University, Baton Rouge 70803.

⁴ California Pellet Mill Co., San Francisco, CA.