title: Methane emission from rice fields in relation to management of irrigation water.
abstract: A field experiment was conducted for two years to find out best water management practice to mitigate methane emission from the rice-fields. Continuously flooded conditions yielded two major flushes of methane emission and on an average resulted in relatively higher rate of methane emission (2.20 and 1.30 mg m(-2) hr(-1), respectively in 2005 and 2006) during the kharif season. The methane flux was reduced to half (1.02 and 0.47 mg m(-2) hr(-1), respectively in 2005 and 2006) when rice fields were irrigated 2-3 days after infiltration of flood water into the soil. Irrigating the field at 0.15 bar matric potential reduced seasonal methane flux by 60% (0.99 and 0.41 mg m(-2) hr(-1), respectively in 2005 and 2006) as compared to completely flooded conditions, without any decline in grain yield (60 q ha(-1)).
authors: Department of Soils, Punjab Agricultural University, Ludhiana - 141 004, India. manupurba@gmail.com
authors: Maninder Kaur
authors: MK
authors: Khosa
authors: B S
authors: BS
authors: Sidhu
authors: D K
authors: DK
authors: Benbi
mesh_terms: D057914:Agricultural Irrigation; D018556:Crops, Agricultural; D008697:Methane / Q000032:analysis*; D012275:Oryza; D012621:Seasons
chemical_list: D008697:Methane