Calorimetric determination of metabolic heat, CO₂ rates and the calorespirometric ratio of soil basal metabolism
Barros, Nieves | Feijóo, Sergio | Hansen, Lee D.
Characterizing soil metabolism requires measurement of the CO₂ production rate or metabolic heat rate. While a single rate provides information on how rapidly substrates are being metabolized, the ratio of metabolic heat rate to CO₂ production rate provides information on the nature of the substrates and the biochemical reactions taking place in the soil. Methodology to simultaneously monitor metabolic heat and CO₂ production rates of soil basal metabolism by calorimetry is described. Plots of metabolic heat and CO₂ rates against time for thirteen soil samples collected along a transect in northern Spain are presented. The ratio of metabolic heat rate to CO₂ production rate showed degradation of carbohydrates through aerobic respiration in some of the samples and informed about the nature of the organic matter being degraded in all of them.Show more [+] Less [-]