Mitigate CH₄ emission by suppressing methanogen activity in rice paddy soils using ethylenediaminetetraacetic acid (EDTA)

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• 作者：Prabhat Pramanik ; ^{prabhat2003@gmail.com" class="auth_mail} ; Pil Joo Kim ; ^{pjkim@gnu.ac.kr" class="auth_mail}
• 关键词：Paddy soils ; Methane emission mitigation ; EDTA application ; Plant growth
• 刊名：Geoderma
• 出版年：May, 2014
• 年：2014
• 卷：219-220
• 期：Complete
• 页码：58-62
• 全文大小：320 K

文摘

Methane (CH₄) is the second most potent greenhouse gases after carbon dioxide. More than 90% of world rice is cultivated under submerged condition, which facilitates CH₄ production in soil. In this pot experiment, different doses of EDTA were applied in rice paddy soils to evaluate their effects on CH₄ emission and plant growth during rice cultivation. Application of EDTA at small doses (up to 5.0 ppm) significantly (P < 0.05) suppressed CH₄ emission without compromising rice grain yield. Higher doses (10.0 ppm) of EDTA application extended vegetative growth stage of rice plants, which not only reduced ripening percent of rice grains but also increased CH₄ emission (even more than control). Therefore, based on this pot experiment data it could be concluded that EDTA application at 5.0 ppm was probably the most rational treatment to mitigate CH₄ emission from rice paddy soils.