Methane yields from grazing livestock:an overview
Summary Grasslands are chiefly utilised by ruminant and ruminant‐like (camelids) livestock species.A unique property of these species is their ability to convert cellulose, hemicellulose and non‐protein nitrogen to useful animal products ; which is achieved by the microbial fermentation in their forestomach.Fermentation, however, is associated with production of methane (CH4 ), which not only represents a waste of feed energy, but CH4 is also a powerful greenhouse gas.Ruminants are the single most important source of CH4 emission and globally enteric CH4 emissions from managed grasslands have been estimated to account for 44 Tg/yr ( Clark et al.2005 ).There is a convention in international inventory comparisons of expressing enteric CH4 emission from ruminants as CH4 yield ( ％ of gross energy intake, GEI).Here we overview the main factors responsible for CH4 yield from grazed livestock.
methane livestock grazing
C.S.Pinares-Pati(n)o H.Clark
Land,Climate & Environment,AgResearch Limited,Grasslands Research Centre,Private Bag 11008,Palmerston North,New Zealand
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）