Methane Emission Under Alternative Irrigation Regimes in Malaysian Rice Cultivation

Nur Fitriah Pauzai, . and Muhammad Firdaus Sulaiman, . and Adibah Mohd Amin, . and Nur Azleen Jamal Jaganathan, . and Amalia Mohd Hashim, . and Mohd Fairuz Md Suptian, . (2023) Methane Emission Under Alternative Irrigation Regimes in Malaysian Rice Cultivation. Malaysian Journal of Soil Science (MJSS) (Malaysia), 27. pp. 179-185. ISSN 1394-7990

Rice cultivation under continuous flooding (CF) is a major anthropogenic emitter of methane gas (CH₄) due to the oxygen-deprived state of the submerged soil. The potentials of alternative irrigation regimesi.e., mid-season drainage (MD) and alternate wetting and drying (AWD) to reduce CH₄ emissions from Malaysian rice cultivation were investigated in the present study. Rice (Oryza sativa var. MR297) was transplanted into 15 tanks and randomly assigned to each of the three treatments: CF, MD and AWD in a randomized complete block design (RCBD). Emissions of CH₄ were measured weekly by collecting air samples using static chambers and analyzing the air samples for CH₄ concentration using gas chromatography (GC). The present study found that cumulative CH₄ emissions per planting cycle were 70.24, 30.75, and 15.93 g CH₄ mˉ²from treatments CF, AWD and MD, respectively. Methane emissions of the MD and AWD treatments were 77.07% and 57.81% lower, respectively, compared to CH₄ emissions of CF. The present study indicated that AWD and MD had the potential to reduce CH₄ emission in rice cultivation.

Full text available from: Official URL: https://www.msss.com.my/mjss/Full%20Text/vol27/V27...

Abstract

Rice cultivation under continuous flooding (CF) is a major anthropogenic emitter of methane gas (CH₄) due to the oxygen-deprived state of the submerged soil. The potentials of alternative irrigation regimesi.e., mid-season drainage (MD) and alternate wetting and drying (AWD) to reduce CH₄ emissions from Malaysian rice cultivation were investigated in the present study. Rice (Oryza sativa var. MR297) was transplanted into 15 tanks and randomly assigned to each of the three treatments: CF, MD and AWD in a randomized complete block design (RCBD). Emissions of CH₄ were measured weekly by collecting air samples using static chambers and analyzing the air samples for CH₄ concentration using gas chromatography (GC). The present study found that cumulative CH₄ emissions per planting cycle were 70.24, 30.75, and 15.93 g CH₄ mˉ²from treatments CF, AWD and MD, respectively. Methane emissions of the MD and AWD treatments were 77.07% and 57.81% lower, respectively, compared to CH₄ emissions of CF. The present study indicated that AWD and MD had the potential to reduce CH₄ emission in rice cultivation.

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Item Type:	Article
AGROVOC Term:	rice
AGROVOC Term:	methane
AGROVOC Term:	greenhouse gases
AGROVOC Term:	irrigation
AGROVOC Term:	environmental impact assessment
AGROVOC Term:	climate change
AGROVOC Term:	Oryza sativa
Geographical Term:	Malaysia
Depositing User:	Mr. Khoirul Asrimi Md Nor
Date Deposited:	19 May 2025 07:19
Last Modified:	19 May 2025 07:19
URI:	http://webagris.upm.edu.my/id/eprint/2789

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