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2004•International AgrophysicsRequires access

Effect of methane on soil dehydrogenase activity

Małgorzata Brzezińska, Teresa M. Włodarczyk, Jan Gliński

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Abstract

Changes in soil respiration and dehydrogenase activity as effected by methane oxidation were studied in two loess soils under laboratory conditions. Stimulation of soil dehydrogenases reached the maximum at the beginning of the rapid CH 4 and O 2 depletion and intensive CO 2 production. After 7-day incubation with CH4, dehydrogenase activity increased by 112 and 66% in an Eutric Cambisol and a Haplic Phaeozem, respectively (P<0.001). The Phaeozem respired more intensively than Cambisol, but the stimulation of the respiration by CH 4 supply was evidently higher in the Cambisol. The methanotrophic activity of the soils tested varied in their relation to the respiration. The molar ratios of CH4 oxidized to O 2 consumed to CO 2 evolved was as 1 mol:1.44 mol:0.52 mol in Cambisol, and 1 mol:1.03 mol:0.24 mol in Phaeozem.

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What this paper is about

Changes in soil respiration and dehydrogenase activity as effected by methane oxidation were studied in two loess soils under laboratory conditions. Stimulation of soil dehydrogenases reached the maximum at the beginning of the rapid CH 4 and O 2 depletion and intensive CO 2 production. After 7-day incubation with CH4, dehydrogenase activity increased by 112 and 66% in an Eutric Cambisol and a Haplic Phaeozem, respectively (P<0.001). The Phaeozem respired more intensively than Cambisol, but the stimulation of the respiration by CH 4 supply was evidently higher in the Cambisol. The methanotrophic activity of the soils tested varied in their relation to the respiration. The molar ratios of CH4 oxidized to O 2 consumed to CO 2 evolved was as 1 mol:1.44 mol:0.52 mol in Cambisol, and 1 mol:1.03 mol:0.24 mol in Phaeozem.

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Available abstract

Changes in soil respiration and dehydrogenase activity as effected by methane oxidation were studied in two loess soils under laboratory conditions. Stimulation of soil dehydrogenases reached the maximum at the beginning of the rapid CH 4 and O 2 depletion and intensive CO 2 production. After 7-day incubation with CH4, dehydrogenase activity increased by 112 and 66% in an Eutric Cambisol and a Haplic Phaeozem, respectively (P<0.001). The Phaeozem respired more intensively than Cambisol, but the stimulation of the respiration by CH 4 supply was evidently higher in the Cambisol. The methanotrophic activity of the soils tested varied in their relation to the respiration. The molar ratios of CH4 oxidized to O 2 consumed to CO 2 evolved was as 1 mol:1.44 mol:0.52 mol in Cambisol, and 1 mol:1.03 mol:0.24 mol in Phaeozem.

Key concepts: Cambisol, Chemistry, Soil water, Respiration, Environmental chemistry, Incubation, Methane, Dehydrogenase

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