This study was conducted to investigate the national methane emission from livestock cnteric fermentation.
For methane emission estimation, livestock were mainly categorized to cattle, swine, poultry, sheep, goats and horse, and cattle were further sub-categorized to calves, fattening cattle, breeding cows in Hanwoo and calves, fattening cattle and lactating cows in dairy cattle.
Tier 2 methane emission factors were deduced based on the characteristics of animal performances, live weight, slaughter weight, daily weight gain, and feed digestibility in each category. Tier 2 emission factors of Hanwoo range from 39 to 49 ㎏／head／year and it is similar to that of Tier 1(47㎏／head／year). Tier 2 emission factor of dairy cattle was 107㎏／head／year and it is slightly lower than that of Tier 1)118㎏／head／year).
Total methane emission from livestock enteric fermentation by Tier 2 mehtod was estimated to be 126.8 tonese in 2001. The methane emissions by Hanwoo, dairy cattle, swine, goats, horses and sheep were 61.70, 47.76, 13.08, 2.25, 0.17 and 0.01 tones, respectively.
By the use Tier 2 method instead of Tier 1, the accuracy and reliability of methane emission estimates from livestock cnteric fermentation in Korea is considered to be improved.
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