In the present study an estimation of livestock enteric CH4 emission has been made from feeding systems (diets) for different animal functions (maintenance, production and growth) prevailing in different agroecological regions (AERs) of India using livestock population 2003. Estimations comprised of dietary intake, digestibility and CH4 emission factors for ruminant species of different age groups determined from feeding systems/diets. Methane production (ml g–1) from production diets in animal species tended to be more than growth and maintenance diets.
