DeGREGORIO, R. M.

DERESZ, F.

HUBER, J. T.

SILVA, A. G.

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~use of soybean protein in milk replacer~ for calves. A.G.Silva*, J.T. Huber, and~R.M. DeGre~orlo, Mlch1gan State Un1verslty, East Lansing.Twenty-four male Holstein calves (8/treatment) were fed milk replacers (14% solids) contai~ing 19% crude protein from a) 100% milk protein (MP); b) 66% modified soy protein + 34\ MP(MS); c) 66% heated soy flour + 34\ MP (SP) as the only nutrients at 8, 9, 10, 11, 12, 12and 12\ body weight from 1 to 7 wk. Results were as follows:Ration ADG ADG Peed/Gain Dig. of OM (%)(g/day) (% initial w t ) (kg) 2 wk 5 wkMP(lOO% of CP) 327a a a a241ab36.6ab 2.00ab 83.4 90.7bMS(66% of CP)203b27.8b 2.47b 74.1 87.2bS1-'(66%of CP) 24.0 2.94 78.4 85.3abMeans with different superscripts are different (P<. 05) .No differences in scours score or daily rectal temperature werc noted. On t.he 1ast day o fthe trial, two animals per treatment were saerifieed and the smal1 intestine was dividedinto three equa1 sections. From each section two 2.5x2.5 em tissue samplcs were taken forseanning e1ectron mieroseopy. Subjective evaluation of these seans showed wide morpholo-giea1 variation in size and shape af vil1i. Greater differenees were observed withinanima1s than between treatments. (Partia1ly supported by Land O'Lakes, Ine., Webster, IA).KEY WORDS, Soybean protein, Milk rep1aeer, Calves

Use of soybean protein in milk replacers for calves.

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Use of soybean protein in milk replacers for calves.

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