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Soy protein concentrate and heated soy flours as protein sources in milk replacer for preruminant calves
Thirty-two male calves (8/treatment) in Trial 1 and 41 male and female calves (10 or 11/treatment) in Trial 2 were fed milk replacers containing 100% of the total protein from milk sources or 25% from milk and 75% from a soy product: soy protein concentrate; commercial heated (fully cooked) soy flou...
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Published in: | Journal of dairy science 1988-05, Vol.71 (5), p.1301-1309 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Thirty-two male calves (8/treatment) in Trial 1 and 41 male and female calves (10 or 11/treatment) in Trial 2 were fed milk replacers containing 100% of the total protein from milk sources or 25% from milk and 75% from a soy product: soy protein concentrate; commercial heated (fully cooked) soy flour; or experimental soy flour for 6 wk. The experimental flour received moist heat sufficient to reduce trypsin inhibitor to 1 unit/mg. Calf performance improved with age on all diets. Growth, protein and dry matter digestibility, nitrogen retention, and morphology of the intestinal mucosa of calves on the all milk-protein diet were superior to those of calves on diets containing a soy product. All soy-fed groups had a humoral but no cell-mediated immune reaction to soy proteins. Soy protein concentrate and the experimental heated soy flour were superior to the commercial heated soy flour as protein sources for milk replacer. |
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ISSN: | 0022-0302 1525-3198 |
DOI: | 10.3168/jds.S0022-0302(88)79687-3 |