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Table 1 Dairy cow enteric fermentation emissions factor inputs

From: Revised methane emissions factors and spatially distributed annual carbon fluxes for global livestock

Region Based on Average animal body mass (kg, lactating cows only) % Stall fed animals Average milk production (kg/head/year) Gross energy intake Digestibility of feed (%) Ym (%)
IPCC 2006a This study IPCC 2006a This study IPCC 2006a This study IPCC 2006a This studya,b IPCC 2006a This study IPCC 2006a This study
US and Canada US 600 680 [12] 100 93 [12, 39] 8400 9732 [12, 39] 301.7 403.2 75 66.7 [12] 6.5 6 [70]
W. Europe EU-15 600 624 [71] 100 77 [70] 6000 6935 [71] 275.4 304.9 70 70.2 [70] 6.5 6.53 [70]
E. Eur.–Ctrl. Asia Russian Fed. 550 572 [4, 71] 100 80 [70] 2550 3898 [70] 232.5 233.9 60 68.6 [70] 6.5 6 [70]
Oceania Australia 500 565 [70] 0 7 [70] 2190 5789 [70] 234.6 253 60 76.1 [70] 6.5 7.24 [70]
Latin America Brazil 400 458 [72] 0 2 [73] 800 1208 [74] 179.3 207.1 60 60c 6.5 8 [74]
E.-S.E. Asia China 350 500 [59, 75] 100 100 [58, 59, 76] 1650 3011 [36] 160.9 333.7 60 60c 6.5 7 [76]
Africa Ethiopia 275 354.75d 100 50 [77] 475 687.2 [36, 77] 107.3 147.2 60 60c 6.5 8e
S. Asia India 275 281 [78, 79] 100 70 [77] 900 1355.2 [36, 77] 135.4 160.2 55 55c 6.5 8e
  1. Only lactating dairy cows are included in the dairy cow category. Reported values that included dairy calves, heifers, dry cows, and/or replacements were not used or were adjusted to reflect producing dairy cow populations
  2. aCalculated using information in supplemental tables in Chapter 10 of IPCC 2006 [4]
  3. bNet energy for growth and wool production are assumed to be zero for mature dairy cows
  4. cUnchanged from information in supplemental tables in Chapter 10 of IPCC 2006 [4] due to lack of newer information
  5. dBased on average increases found for Latin America and E.-S.E. Asia, due to lack of information
  6. eAs reported for Latin America, due to lack of information