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Monensin supplementation of young Israeli Friesian male cattle†

Published online by Cambridge University Press:  02 September 2010

D. Levy ,
Z. Holzer  and
D. Ilan
D. Levy
Affiliation:
Agricultural Research Organization, Nve-Ya'ar Regional Experiment Station, PO, Haifa, Israel
Z. Holzer
Affiliation:
Agricultural Research Organization, Nve-Ya'ar Regional Experiment Station, PO, Haifa, Israel
D. Ilan
Affiliation:
Ministry of Agriculture, Extension Service, Israel
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Abstract

Four groups of 14 3-month-old Israeli Friesian male cattle were each given monensin supplement in their concentrates at the following rates: between 3 and 6 months of age, 0, 0, 25 and 35 p.p.m.; and between 6 months and slaughter, 0, 35, 35 and 35 p.p.m. They were offered hay at approximately 0·3 % of their live weight and concentrates ad libitum.

Daily gain between 3 and 6 months was 1·36, 1·40, 1·50 and 1·57 kg/day, respectively; between 6 months and slaughter it was 1·22, 1·32, 1·33 and 1·24 kg/day, respectively. Differences in intake of concentrates were small. There were no significant differences in slaughter data.

Daily carcass gain throughout the experiment was 0·71, 0·74, 0·77 and 0·76 kg/day, respectively.

Monensin-supplemented animals were approximately 9% more efficient in the conversion of metabolizable energy into live weight or carcass weight than the control animals.

Production of propionate in the rumen was significantly increased in response to monensin supplementation, and the acetate to propionate ratio was significantly reduced.

Type
Research Article
Information
Animal Production , Volume 29 , Issue 3 , December 1979 , pp. 305 - 310
Copyright
Copyright © British Society of Animal Science 1979

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References

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