The Influence of Moisture and C/N on Soil Microbial Activity
Explore the impact of moisture levels and carbon-to-nitrogen ratio on carbon use efficiency and energy use efficiency in artificial soil. Continuous calorimetry measurements reveal insights into heat production, CO2 evolution, and biomass production in soil samples over a 76-day incubation period.
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Presentation Transcript
Experimental Setup Artificial Soil Blank x 5 x 5 Cellulose Destructive soil sampling on 5 days Blank Moist = 10% N T = 7 C/N = 18 Moist = 14.4% Cellulose TAM Air T = 20 C/N = 9 N Moist = 19% Continuous calorimetric measurements TherMic 1
Experimental Setup - sampling schedule Artificial Soil CUE_EUE_relationship.Rmd Continuous calorimetry (45/76 DAYS incubation) CO2 + CO2 + CO2 + CO2 + CO2 + CO2 Heat Production rate [ W g-1] / CO2 [mmol g-1] Day 0 Day 7 Day 15 Day 20 Day 28 Day 45 Day 76 Time [day] TherMic 2
Results & Discussion the effect of moisture and C/N on CUE and EUE in artificial soil TherMic 3
Results & Discussion link between heat and CO2 in artificial soil N supply Moisture Temperature ??? ? ??? ? No apparent differences Moisture N supply Temperature Biomass production? Biomass production? relative CO2> heat Energy investment in anabolism per CO2? linearity TherMic 4
N T = 20 C/N = 9 N Moist = 14.4% T = 20 N Moist = 14.4% C/N = 9 N TherMic 5
