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Effect of different quantities of dietary barley grain on methane production in sheep

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2012 IX International Livestock Environment Symposium (ILES IX)  ILES12-0853.(doi:10.13031/2013.41652)
Authors:   María Carmen López, Carla Ibáñez, Ion Pérez-Baena, José Vicente Martí, Salvador Calvet, Nemesio Fernández, Carlos Fernández
Keywords:   methane production, Guirra sheep, retained energy

The methane (CH4) production was determined by indirect calorimetry. Twelve dry and non pregnant Guirra sheep were fed with 3 diets consisting in the same quantity of alfalfa hay (2 kg/d offered) and increasing quantities of barley grain (0.15, 0.30 and 0.45 kg/d). The experimental design was completely random with 4 replication by treatment. Ewes were allocated to individual metabolism cages. After 10 d of adaptation, feed intake, total fecal and urine output were recorded daily during a 5 d period, as well as body weight (BW) at the beginning and end of the period. Then, gas exchange measurements were recorded by a mobile open-circuit respirometry system using a face mask. Methane production was 45.35 kJ/kg BW0.75/d, as average for all diets and the methane conversion factor was 3.5%).

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