Amino acid supplementation of calf milk replacers containing bovine plasma protein
type: CreativeWork
description: Traditionally milk replacer formulations for preweaned calves use milk protein sources (now principally whey proteins) because of their high digestibility, desirable amino acid profile, and lack of anti-nutritional factors. Over the course of the past five years the price of milk-based proteins has continued to increase. As a result research has focused on finding more cost effective alternative protein sources to incorporate into milk replacers that result in similar performance compared to milk-derived protein formulations. Therefore, the objective of this experiment was to determine the effects of calf milk replacers containing 0, 5, or 10% bovine plasma protein, either without or with supplemental Ile and Thr, on growth and health of Holstein bull calves (n = 104) for 56 d. The milk replacers were formulated to contain 22% crude protein (CP), 20% fat, and 2.0% Lys. Treatments were as follows (M): control, all milk protein MR, with Met added to achieve a Met:Lys ratio of 0.31; (5P): 5% addition of PP (plasma protein; 18% CP), with Met added to equal the ratio in treatment M; (5PA): 5% PP addition as in treatment 5P, but with Ile and Thr added to equal the amount in treatment M; (10P): 10% addition of PP (36% CP), with Met added to equal the ratio in treatment M; and (10PA): 10% PP addition as in treatment 10P, but with Ile and Thr added to equal amount in treatment M. Calves were fed the treatments twice daily at 12.5% solids at a rate of 10% of arrival body weight (BW) for the first 2 d, 12% of arrival BW for the remainder of the first week, and 14% of BW, adjusted weekly, until week seven. During the eighth week calves were fed once a day at 7% of BW and then weaned. Starter was not fed until the sixth week for ad libitum intake. Intake, health scores, and fecal scores were measured daily. Body weight and growth measures were taken weekly and blood serum samples were taken during week 4. There was no effect of treatment on crude protein or metabolizable energy …
abstract: Traditionally milk replacer formulations for preweaned calves use milk protein sources (now principally whey proteins) because of their high digestibility, desirable amino acid profile, and lack of anti-nutritional factors. Over the course of the past five years the price of milk-based proteins has continued to increase. As a result research has focused on finding more cost effective alternative protein sources to incorporate into milk replacers that result in similar performance compared to milk-derived protein formulations. Therefore, the objective of this experiment was to determine the effects of calf milk replacers containing 0, 5, or 10% bovine plasma protein, either without or with supplemental Ile and Thr, on growth and health of Holstein bull calves (n = 104) for 56 d. The milk replacers were formulated to contain 22% crude protein (CP), 20% fat, and 2.0% Lys. Treatments were as follows (M): control, all milk protein MR, with Met added to achieve a Met:Lys ratio of 0.31; (5P): 5% addition of PP (plasma protein; 18% CP), with Met added to equal the ratio in treatment M; (5PA): 5% PP addition as in treatment 5P, but with Ile and Thr added to equal the amount in treatment M; (10P): 10% addition of PP (36% CP), with Met added to equal the ratio in treatment M; and (10PA): 10% PP addition as in treatment 10P, but with Ile and Thr added to equal amount in treatment M. Calves were fed the treatments twice daily at 12.5% solids at a rate of 10% of arrival body weight (BW) for the first 2 d, 12% of arrival BW for the remainder of the first week, and 14% of BW, adjusted weekly, until week seven. During the eighth week calves were fed once a day at 7% of BW and then weaned. Starter was not fed until the sixth week for ad libitum intake. Intake, health scores, and fecal scores were measured daily. Body weight and growth measures were taken weekly and blood serum samples were taken during week 4. There was no effect of treatment on crude protein or metabolizable energy …
author: Morrison, Sarah Yvonne
language: en
keywords: Amino acid, plasma protein, milk replacer
date published: 2015-07-22T22:16:52Z
date modified: 2026-07-22T22:26:11Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois at Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/78390