Effects of litter placement, soil moisture and temperature on soil carbon dioxide emissions in a sandy grassland soil

Semiarid grasslands contribute significantly to global soil carbon (C) storage. Carbon loss from these systems via microbial decomposition is controlled by abiotic and biotic factors such as moisture temperature C input. Plant litter in can be present above the surface or mixed with trampling, especially intensively grazed areas. A quantitative understanding of factors' interactive effect critical for predicting dynamics response grassland management environmental conditions changes. Therefore, we conducted a 3-month laboratory incubation experiment quantify impact placement on dioxide (CO2) emissions under three temperatures. The treatments including placements (no litter, top soil) levels (23%, 37% 50% water-filled pore space [WFPS]) were incubated at temperatures (10°C, 20°C 30°C). fluxes measured every 2 weeks. Soil CO2 higher all initially declined overtime 30°C. Mixing increased cumulative 24% 19.5% 30°C, respectively, compared no litter. Also, soil-litter mixing showed 14.3% 21.6% increase respectively. At temperatures, WFPS resulted similar emissions. results this study indicate that rising 10°C 30°C accelerate increasing