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The relationship among diet composition, intake, and methane production was investigated with data during 404 total energy balance trials with Holstein cows. Methane production in all trials was measured in open circuit respiration chambers. The most useful predictor of total methane production was amounts of soluble residue, hemicellulose, and cellulose that apparently were digested. The regression was methane (Meal) = .439 + .273 + .015 kg digestible soluble residue + .512 -+ .078 kg digestible hemicellulose + 1.393 + .097 kg digestible cellulose.
Moe et al. (Mon,) studied this question.