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RISS 인기검색어
- 검색키워드
- 저자 : 탈엠와존보스코 ( John Bosco Talemwa ) (검색결과 1 건)
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탈엠와존보스코 ( John Bosco Talemwa ),홍성구 ( Seong-gu Hong ) 한국농공학회 2019 한국농공학회 학술대회초록집 Vol.2019 No.-
Agriculture accounts for 10-20% of the total global anthropogenic emissions of greenhouse gases (GHG) and paddy rice fields are the main sources of global methane (CH<sub>4</sub>) and nitrous oxide (N<sub>2</sub>O) emission. The burden of feeding an ever-increasing global population requires greater food production. Meeting this challenge has resulted in greater applications of nitrogen-containing fertilizers to increase total food production per unit area and increasing area under paddy rice cultivation. The resulting consequences of this unparalleled release of anthropogenic gases into the environment are an increase in atmospheric concentration of N<sub>2</sub>O and CH<sub>4</sub>. Despite having larger heat trapping effects, N<sub>2</sub>O (298) and CH<sub>4</sub> (34) have received far less attention than carbon dioxide (CO<sub>2</sub>). N<sub>2</sub>O and CH<sub>4</sub> are long-lived radiatively active GHG with an atmospheric lifetime of approximately 120 and 12 years respectively and play a significant role in the depletion of stratospheric ozone. The current study is aimed at evaluating and quantifying seasonal greenhouse gases emission from rice paddy fields using a static chamber method. Monitoring of these GHGs from rice fields has not been done extensively worldwide mainly due to preconceived lower emissions compared with other sources and methodological difficulties encountered in paddy rice soils and yet their emissions from rice fields are on an appreciable rise. Therefore, monitoring emissions from different rice ecosystems and estimating global budgets from rice fields needs to assume high significance due to major changes that have occurred in the production systems. Better understanding of area specific GHG data is fundamental to making the right decisions that help reduce on the emission and effects of climate change. Based on the preliminary results, the rate of N<sub>2</sub>O emission per square meter from paddy fields showed a consistent increase from 0.6 - 21.4 mg/N.m<sup>2</sup>/day on the 57<sup>th</sup> day after transplanting. The emission rate however, more than doubled after the application of N containing fertilizers, highlighting the contribution of N fertilizers towards the production and emission of GHG. This study is a part of a bigger study which aims to see the changes in greenhouse gas emissions by management practices. As a matter of fact, this study is intending to ascertain the background emissions of greenhouse gases before implementing management practices.
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