A Study on Estimation of Methane Gas Emission by Enteric Fermentation from Goat in Bangladesh

Abstract

In Bangladesh, the goat is popular livestock among rural people with low income and also among some commercial farmers due to its high prolificacy and high profitability. Nowadays many farmers making commercial goat farms due to the increased demand and higher profitability. As a result, the goat population of the country is also increasing gradually every year. Due to this increasing population of goats and other livestock the emission of greenhouse gases is also on a rise. In our study, we have discussed about the methane emission from the total goat population of Bangladesh. We followed Intergovernmental Panel on Climate Change (IPCC) guidelines in our study. We used the Tier-2 method for the calculation of total methane emission from goats. We developed emission factors for Black Bengal and Jamunapari goat separately using their average body weight and gross energy (GE) intake following the IPCC (2019) guidelines. After calculation using the different emission factors for Black Bengal and Jamunapari goats, in 2016-17, 2017-18, 2018-19, 2019-20, and 2020-21 the total emission of methane from the goat population of Bangladesh is 60.112, 60.509, 60.891, 61.281and 61.673 Gigagrams/year respectively using Tier-2 method and 129.650, 130.500, 131.350, 132.150 and 133.000 Gigagrams/year respectively using Tier-1 method; the emission from Black Bengal goat was 52.297, 52.638, 52.975, 53.314 and 53.654 Gigagrams/year respectively using Tier-2 method and 116.700, 117.450, 118.200, 118.950 and 119.700 Gigagrams/year using Tier-1 method respectively; the emission from Jamunapari goat was 7.815, 7.866, 7.916, 7.967, and 8.018 Gigagrams/year using Tier-2 method and 12.950, 13.050, 13.150, 13.200 and 13.300 Gigagrams/year using Tier-1 method respectively.