The role of domestic animals in production of GHG's in Iran

摘要

Important part of environment pollutant is Greenhouse Gases (GHG's). Methane and nitrous oxide as a part of GHG's are produce from feed fermentation during digestion process in ruminant alimentary tract and manure management. On the other hand, more than 70 million head ruminants' animal is exist in Iran. IPCC guideline (1996) has been used for estimation of methane and nitrous oxide emission and with help of extrapolation some data in relation to rural regions has been estimated, interpolation also used for prediction of future status in population and other needs factors. In this manner feed consumes and fermented by livestock animals produce up to 620 and 753 Gg methane for year of 2000 and 2005, respectively. Along with this, methane emission from manure deposition has been estimated up to 28 and 33 Gg for years of 2000 and 2005, respectively. Nitrous oxide as a one of GHG's will produce from microbial cells during manure deposition or use of manure as a fertilizer. This source of GHG's formed up to 28 and 34 Gg-gas emission for years of 2000 and 2005, respectively. This amount is indispensable and needs to mitigation scenario. In this regard, several scenarios have been suggested that with help of them, this be expected to mitigate GHG's emission about 15% from 2000 till 2005.