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SHORT COMMUNICATION
Effects of ruminal and duodenal infusion of starch and
protein on GH secretion in sheep
Y. Obara
1
1
Department of Animal Physiology, Graduate School of Agricultural Science, Tohoku University,
Sendai 981-8555, Japan
2
Department of Animal Nutrition, Faculty of Agriculture, Iwate University,
Morioka 020-8550, Japan
Publication date: 2004-08-30
Corresponding author
A. Hagino
Department of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan
Department of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan
J. Anim. Feed Sci. 2004;13(Suppl. 1):397-400
KEYWORDS
ABSTRACT
The effect of ruminal and duodenal infusion of maize starch and casein on plasma growth
hormone (GH) concentrations was studied in sheep. Plasma GH concentrations were decreased
after feeding. Maize starch and casein infusion into the rumen prolonged the decrease after feeding
whereas duodenal infusion of maize starch did not affect the decrease. Duodenal infusion of casein
inhibited the decrease in GH after feeding. These data suggest that maize starch and casein are
degraded by microbial fermentation and increased VFA production in the rumen may be involved in
the prolonged decrease in GH secretion after feeding.
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| ISSN: | 1230-1388 |
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