Title: Effect of rice straw incorporation on methane emission and rice yields from rice cropping system by DNDC-Rice model

Authors: Kruamas Smakgahn; Tamon Fumoto; Kazuyuki Yagi

Addresses: Faculty of Liberal Arts and Science, Kasetsart University Kamphaeng Saen Campus, Kamphaeng Saen District, Nakhon Pathom Province, 73140, Thailand ' National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, Ibaraki, 305-8604, Japan ' National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, Ibaraki, 305-8604, Japan

Abstract: This study applied the DNDC-Rice model and simulated against field observation in Thailand. Simulated CH₄ emission data shown acceptable results compared to field observation recorded. Rice straw incorporation into field plays important role on CH₄ emission by continuous increase soil organic carbon as well as soil iron contents, consequently to low soil Eh which is suitable for CH₄ production. Higher amount of rice straw applied induces higher CH₄ emission vice versa. Therefore, reduction of rice straw amount incorporation into soil is possible practical mitigation options for CH₄ production.

Keywords: DNDC-Rice model; global warming; methane emission; mitigation option; rice cropping system.

DOI: 10.1504/IJGW.2018.094310

International Journal of Global Warming, 2018 Vol.16 No.1, pp.54 - 63

Received: 02 Nov 2016
Accepted: 25 Sep 2017
Published online: 29 Aug 2018 *

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