
TY  - JOUR
A1  - O'Kelly, JC 
A1  - Spiers, WG 
T1  - Effect of monensin on methane and heat productions of steers fed lucerne hay either <I>ad libitum</I> or at the rate of 250 g/hour
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1992
VL  - 43
IS  - 8
SP  - 1789
EP  - 1793
KW  - monensin methane;heat production;feeding frequency
UR  - https://doi.org/10.1071/AR9921789 
N2  - The effect of monensin supplement (33 mg/kg feed) on methane and heat productions was studied in Brahman steers offered lucerne hay in two feeding regimes: ad libitum (AL) or at the rate of 250 g/h (GPH). The monensin treated animals consumed 65 kg less feed than untreated animals in achieving a mean liveweight gain of.56 kg over 54 days of feeding AL. The 10.5% reduction in daily feed intake due to monensin was associated with a 25.6% reduction in methane production. At equalized feed intakes (adjustments made by covariance) approximately 55% of the reduction in methane caused by monensin was explained by its anorectic effect and 45% by its specific effect on rumen fermentation. In contrast, monensin slightly increased (P = 0.07) liveweight gain, but did not affect methane production in steers fed GPH. Heat production was not significantly altered by the use of monensin in either feeding regime. 
ER  -

