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Title: Emission of methane from rice fields - A review
Authors: Jain, N
Pathak, H
Mitra, S
Bhatia, A
Keywords: Global warming;Lowland rice soil;Methane emission;Mitigation options;Soil properties
Issue Date: Feb-2004
Publisher: NISCAIR-CSIR, India
Abstract: Methane (CH4) with its current concentration of 1.72 ppmV in the atmosphere accounts for 15 per cent of the enhanced greenhouse effect. The atmospheric concentration of CH4 is increasing at 0.3 per cent/y. Lowland rice soil is considered to be one of the major contributors of atmospheric methane. Various soil, climate, and management factors control methanogenesis, the geochemical process that occurs in all anaerobic environments in which organic matter undergoes decomposition, resulting in the formation of CH4 . Methane formed in soil escapes to the atmosphere through vascular transport, ebullition or diffusion. Emission o f CH4 from rice fields can be reduced by: (i) Midseason drainage instead of continuous flooding, (ii) Use of cultivars with low emission potential, (iii) Use of low C:N organic manure, and (iv) Direct establishment of rice crop like dry direct seeded rice.
Page(s): 101-115
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.63(02) [February 2004]

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