In both goats and Sika deer, enteric C[H.sub.4] production expressed as g/kg DDMI
and g/kg DOMI did not differ statistically.
Overall, the A:C ratio, DDMI, and MEI showed a significant negative correlation with snow depth.
Using urine samples deposited in snow by red deer, we quantified the A:C ratio, then estimated digestible dry matter intake (DDMI) and metabolizable energy intake (MEI) of red deer through their curvilinear relationships (Vagnoni et al., 1996).
The methane production (L/kg DMI, L/kg DDMI) was 14% lower in BEO treated groups as compared to control group.
Effect of feeding blend of essential oils (BEO) on methane emission in growing buffalo calves Parameters Group 1 (1) Group 2 Group 3 Body weight (kg) 257 277 278 DM intake (kg/d) 4.92 (a) 5.64 (b) 5.79 (b) C[H.sub.4] (L/d) 188.4 185.1 189.7 C[H.sub.4] (L/kg DMI) 38.32 (a) 32.90 (b) 32.73 (b) C[H.sub.4] (L/kg DDMI) 64.10 (a) 55.01 (b) 55.23 (b) Parameters SEM p value Body weight (kg) 9.747 0.095 DM intake (kg/d) 0.103 <0.001 C[H.sub.4] (L/d) 2.677 0.790 C[H.sub.4] (L/kg DMI) 0.641 <0.001 C[H.sub.4] (L/kg DDMI) 1.21 <0.001 SEM, standard error of the mean; DM, dry matter; C[H.sub.4], methane; DMI, dry matter intake.
In goats and Sika deer, the F:C ratio decreases the nutrient digestibility and the enteric C[H.sub.4] emissions expressed as g/d, g/kg [BW.sup.0.75], % of GEI, g/kg DMI, and g/kg OMI; however, the enteric C[H.sub.4] emissions expressed as g/kg DDMI
and g/kg DOMI were not affected.
The results were also analysed by regression where X= Daily Dry Matter Intake (DDMI, kg [day.sup.-1]) and Y=.
The increase in concentrate in the diet cause of the increase in Daily Dry Matter Intake (DDMI, kg [day.sup.-1)], and this in turn can increase the excreted allantoin in the urine.