CO_2, H_2, and CH_4 Production in Rice Rhizosphere

概要

論文の詳細を見る
Biochemical reactions occurring in the rice rhizosphere were examined in detail with emphasis placed on the competition between CH_4 production and sulfate reduction. we measured CO_2, H_2, and CH_4 production activities in the rice rhizosphere at three growth stages (tillering stage, panicle initiation stage, and 10 days before the flowering stage). H_2 was produced by microorganisms on and/or inside roots. CO_2 production was associated with the respiration of roots and rhizosphere microorganisms. CH_4 was mainly produced in the rhizosphere soil. Not only root exudates but also H_2 and CO_2 thus produced contributed to CH_4 production in the rhizosphere. Root exudates and H_2 were the substrates for sulfate reduction in the rhizosphere, and there was a competition for these substances between the CH_4-producing bacteria and sulfate-reducing bacteria. In the rice rhizosphere, sulfate reduction was dominant over CH_4 production.
社団法人日本土壌肥料学会の論文