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Effect of monensin supplementation on growth, feed digestibility and utilization in young calves†

Published online by Cambridge University Press:  02 September 2010

D. Ilan ,
A. Ben-Asher ,
Z. Holzer ,
Z. Nitsan ,
I. Nir  and
D. Levy
D. Ilan
Affiliation:
Extension Service, Ministry of Agriculture, Tel-Aviv, Israel
A. Ben-Asher
Affiliation:
Extension Service, Ministry of Agriculture, Tel-Aviv, Israel
Z. Holzer
Affiliation:
Agricultural Research Organization, PO Box 6, Bet-Dagan, Israel
Z. Nitsan
Affiliation:
Agricultural Research Organization, PO Box 6, Bet-Dagan, Israel
I. Nir
Affiliation:
Agricultural Research Organization, PO Box 6, Bet-Dagan, Israel
D. Levy
Affiliation:
Agricultural Research Organization, PO Box 6, Bet-Dagan, Israel
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Abstract

Two feeding trials were carried out with Israeli Friesian male calves, commencing at an average age of 7 to 10 days, and covering a suckling period of 30 days followed by a further 90 days. A conventional starter, or one that contained cotton hulls, was used. In each experiment one group of 10 animals served as a control and a similar group was monensin-supplemented. No coccidia were found in the animals. In experiments 1 and 2 monensin supplementation was associated with increased daily gains of 10% and 47% during the suckling period and of 6% and 17% during the next 90 days, but only the differences obtained in experiment 2 were significant. In both experiments, dry-matter intake relative to body weight was higher with monensin supplementation in period 1, but reduced in period 2. The effect of monensin on molar proportions of acetic and propionic acids was smaller than that reported by previous authors for older cattle.

A separate digestibility trial showed that monensin administered to suckling calves, either with milk replacer or directly into the rumen, improved dry-matter digestibility, increased the excretion of amylase, and tended to reduce that of trypsin and chymotrypsin.

Type
Research Article
Information
Animal Production , Volume 32 , Issue 2 , April 1981 , pp. 125 - 131
Copyright
Copyright © British Society of Animal Science 1981

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References

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