A STUDY ON ESTIMATION OF ENTERIC METHANE GAS EMISSION FROM BUFFALO OF BANGLADESH

Abstract

This study aims to estimate the enteric methane emissions from buffalo in Bangladesh using different methods, including Tier-1, Tier-2, GLEAM-i software, and the IFCN method. The research is conducted based on the IPCC 2019 guidelines and incorporates data on buffalo population, feed quality, dry matter intake, and methane yield. The results are compared across these methods to understand variations in emission estimates. The Tier-1 method, a simpler approach, estimates methane emissions using emission factors provided by IPCC (2019) and calculated results was 126.31, 126.90, 127.50 and 128.18 Gigagram (Gg) in the year of 2018-19, 2019-20, 2020-21 and 2021-22 respectively. Tier-2 is a more detailed method, considering factors like dry matter intake and feed composition and our calculated value was 114.74, 115.28, 115.82 and 116.44 Gg as the year mentioned in Tier-1. GLEAM-i software, a comprehensive tool, accounts for various parameters at a regional scaleand here we only calculated the baseline 'BDLivstock2020' value 169.63 Gg. The IFCN method, modified Tier-2 method, focused on farm-level emissions, factors in animal categories and production systems. According to IFCN calculation the results are 104.26, 104.75, 105.24 and 105.80 Gg in same year range in Tier-1 and Tier-2 method. The study found that different methods yield varying estimates of methane emissions, highlighting the importance of methodological choices and data accuracy in such assessments.