Hydrogen oxidation activities in soil as influenced by pH, temperature, moisture, and season

摘要: Hydrogen oxidation in soil was measured at low (1 ppmv) and high (300 H2 concentrations to distinguish between the activities of abiontic hydrogenases Knallgas bacteria, respectively. The two also showed distinctly different pH optima, temperature apparent activation energies. optima for hydrogenase were similar situ, i.e., 8 an slightly alkaline garden (pH 7.3) 5 acidic cambisol 4.6–5.4). Most probable number determinations soils that bacterial populations grew preferentially neutral or media, However, activity by bacteria distinct one 4 a second 6.4–7.0. exhibited 35–40°C, whereas had 50–60°C. energies lower (11–23kJ mol-1) than those (51–145 kJ mol-1). located upper 10 cm changed with season. seasonal changes correlated moisture pH.