Estimation of methane and nitrous oxide emissions from rice fields in Thailand | |
| Author | Rong, Xiang |
| Call Number | AIT Thesis no. EV-94-25 |
| Subject(s) | Nitrous oxide Methane |
| Note | A thesis submitted in partial fulfilment of the requirement for the degree of Master of Science, School of Environment, Resources & Development |
| Publisher | Asian Institute of Technology |
| Abstract | Methane (CH4) and nitrous oxide (N20) are two important greenhouse gases. Nitrous oxide is also responsible for depletion of the stratospheric ozone layer. Rice fields are a major source of anthropogenic methane emission and possibly play a role in nitrous oxide emission due to increasing use of nitrogen fertilizers around the world. In this study, emissions of methane and nitrous oxide have been measured in a Thai rice field . Clear patterns of diurnal emission variations of both gases have been observed, which were found to generally follow the diurnal variation of the soil temperature. A detailed explanation is given to explain the occurrence of a methane emission peak at night. The effects of urea fertilization and field draining on emissions of the two gases are discussed. Methane emission from Thai rice fields is estimated to be 3.32 Tg CH4 (2.49 Tg CH4-C) each year, contributing about 3.4% to global methane budget due to rice cultivation. Finally, mitigation options for methane emission from rice fields are put forward. |
| Year | 1994 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Weihan, Su |
| Examination Committee(s) | Chongrak Polprasert ;Samorn Muttamara |
| Scholarship Donor(s) | Asian Development Bank |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1994 |