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Growth and nutrient utilization by calves fed milk replacers containing milk or soybean protein-concentrate heated to various degrees



Growth and nutrient utilization by calves fed milk replacers containing milk or soybean protein-concentrate heated to various degrees



Journal of Dairy Science 54(9): 1294-1299



Male Israeli-Friesian calves in 4 groups of 6 were fed on colostrum and Milkvit (an all-milk milk replacer) until 7 to 10 days old and then on the following experimental diets: 1, Milkvit; 2, a raw soya bean replacer; 3, a partly toasted soya bean replacer (steam at 120 degrees C was injected for 5 min); 4, fully toasted soya bean replacer (steam injected for 25 min). The calves were fed twice daily. After 30 days calves on diets 2 and 3 were divided into 2 groups according to bodyweight and 3 of each group received toasted soya bean replacer and 3 got Milkvit. This lasted for 16 days. Calves on raw and partly toasted soya replacer lost weight for the first 10 days and gained little from 10 to 30 days. In the first 10 days the calves on replacer 4 gained better, but only 35% of the gain of the calves on Milkvit. In the next 20 days their growth was 75% of gain on Milkvit, and in the last 16 days 95%. Feed utilization was also poor on replacers 1 and 2. Growth and feed utilization improved when calves on diets 1 and 2 were changed to Milkvit or toasted replacer. Digestibility of protein of raw, partly toasted and fully toasted soya bean replacer was 72, 79 and 88%. Blood urea was highest on diets 2 and 3 and lowest on 1; blood glucose was the reverse. There was less diarrhoea on the soya bean diets.

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Accession: 014499586

Download citation: RISBibTeXText

PMID: 5106734

DOI: 10.3168/jds.s0022-0302(71)86023-x


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