02981cas|a2200421 i 4500 20260818112523.0 050499s1994 th uzm rtt 00| a1eng d .b10256957 AIT Thesis no. EV-94-25 Rong, Xiang Estimation of methane and nitrous oxide emissions from rice fields in Thailand Bangkok : Asian Institute of Technology, 1994 59 leaves Thesis ; no. EV-94-25 A thesis submitted in partial fulfilment of the requirement for the degree of Master of Science, School of Environment, Resources & Development Thesis (M.Sc.) - Asian Institute of Technology, 1994 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. Nitrous oxide Methane Weihan, Su, Chairperson Chongrak Polprasert, Examination Committee Samorn Muttamara, Examination Committee Asian Development Bank, Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-94-25 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B15790 .b10256957 mnait x 240401 2 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050003047932 CREATED : 1994-05-17 RECORD # : i10315755 LPATRON : 1018649 LCHKIN : 2006-11-28 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 1 Barcode : 30050004932652 CREATED : 1994-05-17 RECORD # : i10315767 LPATRON : 1026145 LCHKIN : 2016-07-26 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 12 TOT RENEW : 4 Barcode : 30050160055355 CREATED : 2016-11-05 RECORD # : i12975552 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 40251 40251 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-94-25 30050003047932 2026-08-18 11:25:23 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-94-25 30050004932652 2026-08-18 11:25:23 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. EV-94-25 30050160055355 2026-08-18 11:25:23 2026-08-18 40