| Abstrakt: |
Paddy residue is generated as a post-harvest by-product and farmers dispose of such residue in different ways, including in-situ open burning. Burning paddy residue results in a large loss of plant-essential nutrients in addition to polluting the environment and harming human health. In emission inventorying, particularly in the Intergovernmental Panel on Climate Change—greenhouse gas inventory process, estimating emissions due to burning paddy residue is essential. The present study aimed at providing country-specific information in relation to the in-situ open burning of paddy residue in Sri Lanka. Farmer surveys were conducted in selected five administrative divisions (districts) under wet, dry, intermediate and semi-arid climatic zones of Sri Lanka. For the calculations and analyses, the two cultivation seasons, Yala and Maha of the 2015/2016 cultivation year were considered. Fractions of paddy residue burnt, area burnt and emissions due to paddy residue burning were calculated. The highest percentage of burnt paddy residue (13.51%) was recorded from Anuradhapura District and the lowest percentage of burnt paddy residue (1.42%) was found in Kurunegala District. The highest percentage of area burnt was 13.47% in Anuradhapura District during the Maha season and 8.20% of the area was burnt during the Yala in Kurueagala District. Carbon monoxide (CO) was the highest emission due to paddy residue burning followed by methane (CH4). The study's major findings could be incorporated into future national GHG inventories as country-specific information to be used with IPCC Tier 2 approach, to calculate the emissions from in-situ open burning of paddy residue. [ABSTRACT FROM AUTHOR] |
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