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Asian-Australas J Anim Sci > Volume 23(5); 2010 > Article
Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 2010;23(5): 563-566.
DOI: https://doi.org/10.5713/ajas.2010.90488    Published online April 21, 2010.
Methane Emissions from Dry Cows Fed Grass or Legume Silage
Hirotaka Kasuya, Junichi Takahashi
Abstract
Using an open-circuit system, we compared the methane (CH4) emission from dry cows fed first-cut Timothy silage (1st TY), second-cut Timothy silage (2nd TY), second-cut Italian ryegrass silage (2nd IR), third-cut Italian ryegrass silage (3rd IR), or second-cut red clover silage (2nd RC) as the sole feed. The methane emission ranged from 258.2 L day-1 to 396.5 L day-1. The methane emission from dry cows fed red clover silage was relatively lower than that from dry cows fed grass silage. However, the methane emission per unit digestible neutral detergent fiber (NDF) intake (dNDFI) did not differ significantly between the experimental silages. The methane emission was significantly correlated with the NDF intake and digestibility. Methane emission had a significant correlation with the quadratic function of dNDFI. The differences in the daily volume of methane emission from cows fed different forages can be explained by dNDFI.
Keywords: Methane Emission; Cow; Silage; Timothy; Italian Ryegrass; Red Clover


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