Effects of hydrolyzed spray dried red blood cells in milk replacer on calf intake, body weight gain, and efficiency
| Autor: | C. A. Jaynes, J.D. Quigley, Hugh Chester-Jones, M. L. Miller, D. M. Allen, E. Schanus, G.D. Marx |
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| Rok vydání: | 2000 |
| Předmět: |
Male
Erythrocytes Weight Gain Feed conversion ratio Cattle feeding fluids and secretions Starter Milk substitute Genetics medicine Animals Dry matter Food science Dairy cattle Food Formulated Meal Chemistry Hydrolysis food and beverages Animal Feed Milk Animals Newborn Animal Science and Zoology Animal Nutritional Physiological Phenomena Cattle medicine.symptom Weight gain Food Science |
| Zdroj: | Journal of dairy science. 83(4) |
| ISSN: | 0022-0302 |
| Popis: | An alternative protein ingredient based on spray-dried, hydrolyzed red blood cells was evaluated in calf milk replacers. Two experiments were conduced to determine the value of the ingredient on intake, growth, and feed efficiency in dairy calves. In experiment 1, Holstein bull calves (n = 120) were fed calf milk replacer containing 0, 11, 22, or 43% of crude protein as spray dried hydrolyzed red blood cells. Calves were fed 454 g/d of experimental milk replacer reconstituted to 12% dry matter plus a conventional calf starter for 28 d. Body weight gain, intake of milk replacer and calf starter, feed efficiency, fecal scores, and days scouring were unaffected by source of protein. In experiment 2, Holstein calves (n = 69) at the University of Minnesota, Crookston and Waseca were fed milk replacer containing 0, 22, or 43% of crude protein as spray dried hydrolyzed red blood cells. Calves were fed 454 g/d of experimental milk replacer reconstituted to 12% dry matter plus a conventional calf starter containing 0 or 25% alfalfa meal for 35 d. No calves died during the study. Body weight gain, feed efficiency, intake of calf starter and milk replacer, fecal scores, and days scouring were unaffected by increasing hydrolyzed red blood cells in milk replacer. Similar performance of all calves indicated that spray dried hydrolyzed red blood cells can replace up to 43% of crude protein fromwhey protein concentrate without detrimental effects on animal performance. |
| Databáze: | OpenAIRE |
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