Effect of EDTA on Reduction Process in Submerged Paddy Soil with Rice Straw

スポンサーリンク

概要

• 論文の詳細を見る

• Submerged paddy soil with powdered rice straw was incubated anaerobically. In the presence of 10μ_M of EDTA, the amount of Fe(II) significantly increased during the early stage of incubation. This finding suggests that EDTA extracted some part of Fe(III), which was utilized then by Fe(III)-reducing bacterial. These increase in the Fe(II) content was accompanied both by the suppression of sulfate-reduction and by the enhancement of acetic acid (AA)-decomposition. The addition of EDTA did not enhance the CH_4 -production during the early stage of incubation. These findings suggest that the reduction of the EDTA-extractable Fe(III) resulted in electron deficiency and that the electron flow was mainly diverted from sulfate reduction to Fe(III)-reduction in the early stage of incubation. As a result of this electron deficiency, Fe(III)-reducing bacteria may utilize AA as electron donor. The addition of EDTA enhanced both the production and the decomposition of AA in the late stage of incubation as well as the CH_4 -production. these facts suggest hat the reduction of the EDTA-extractable Fe(III) in the early stage of incubation decreased the redox potential, which in turn shortened the duration of the lag period of the anaerobic reactions in the late stage.

• 社団法人日本土壌肥料学会の論文

著者

• Nozoe Takuhito

  Tohoku National Agricultural Experiment Station

• Yoshida Koji

  Tohoku National Agricultural Experiment Station

• Yasuda Michio

  Tohoku National Agricultural Experiment Station

関連論文

• Effect of Ni-EDTA on Production of Methane and Decomposition of Volatile Fatty Acids in Paddy Soil
• Effects of Methanogenesis and Sulfate-Reduction on Acetogenetic Oxidation of Propionate and Further Decomposition of Acetate in Paddy Soil
• Mechanisms of Decomposition of Acetic Acid by Methane-Producing Bacteria in Submerged Paddy Soil
• Effect of EDTA on Reduction Process in Submerged Paddy Soil with Rice Straw

スポンサーリンク