Comparison of models for estimating methane emission factor for enteric fermentation of growing-finishing Hanwoo steers

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Table 1 Descriptive statistics of the data used to estimate gross energy intake of growing-finishing Hanwoo steers based on the IPCC Tier 2 method

	Mean	SD	Coefficient of variation (%)
Body weight (kg)
Growing period	261.6	35.3	13.5
Finishing period	519.3	118.7	22.9
Average daily gain (g/day)
Growing period	766.8	163.1	21.3
Finishing period	845.9	112.9	13.4
Net energy requirement for maintenance (NEm, MJ/day)
Growing period	20.2	2.2	10.9
Finishing period	34.2	6.1	17.8
Net energy requirement for growth (NEg, MJ/day)
Growing period	10.1	2.4	23.4
Finishing period	19.2	4.8	25.0
Ratio of net energy available for maintenance (REM)
Growing period	0.524	0.001	0.163
Finishing period	0.530	0.004	0.813
Ratio of net energy available for growth (REG)
Growing period	0.325	0.001	0.421
Finishing period	0.334	0.007	2.081
Digestible energy content (as a percentage of growth energy; DE%)^a
Growing period	68.4	0.3	0.4
Finishing period	70.5	1.7	2.3

The basal information of monthly animal body weight, average daily gain and diet information were obtained from Kim et al. (2005)
^aDigestible energy as a percentage of gross energy content in a diet