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Effect of air temperature on the abomasal and small intestinal digestion of a milk substitute diet given to young calves

Published online by Cambridge University Press:  02 September 2010

M. S. Cockram  and
T. G. Rowan
M. S. Cockram
Affiliation:
Department of Animal Husbandry, University of Liverpool, Veterinary Field Station, Leahurst, Neston, South Wirral L64 7TE
T. G. Rowan
Affiliation:
Department of Animal Husbandry, University of Liverpool, Veterinary Field Station, Leahurst, Neston, South Wirral L64 7TE
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Abstract

Twelve Friesian calves were each fitted with an abomasal cannula. The calves were placed in a controlled environment chamber and given a milk substitute diet in buckets at 12-h intervals. The calves were exposed to air temperatures of 25°C from 4 to 10 days of age, 5°C from 11 to 14 days of age, and 25°C at 15 days of age. At 9, 10, 11, 14 and 15 days of age, the abomasal contents of the calves were sampled at 2-h intervals and the temperature and pH of the abomasal contents were recorded at 40-min intervals for a period of 12 h. The rectal and abomasal temperatures of the calves were lower at 11 days of age than at 10 days of age, and were greater at 15 days of age than at 14 days of age (P < 0·05).

In a similar experiment four Friesian calves were each fitted with an ileal re-entrant cannula. The calves were exposed to air temperatures of 25°C from 5 to 19 days of age, 5°C from 20 to 26 days of age, and 25CC at 27 days of age. At 18, 19, 20, 26 and 27 days of age the ileal contents of the calves were collected and sampled for a period of 12 h.

No significant effects of the air temperatures of 25° and 5°C on the abomasal digestion (acidity and proteolytic activity of the abomasal contents) and ileal apparent digestibility of the diet were found.

Type
Research Article
Information
Animal Production , Volume 48 , Issue 1 , February 1989 , pp. 67 - 74
Copyright
Copyright © British Society of Animal Science 1989

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