Whole-year-round Observation of N2O Profiles in Soil: A Lysimeter Study

摘要: Despite many studies of the N2O emission, there is a lack knowledge on role subsoil for particularly in sandy soils. To obtain insight into entrapment, diffusion, convection and ebullition soil, concentration soil atmosphere was measured over period 1 year 4 lysimeters (agricultural monoliths m2 × 2 m) at 30, 50, 80, 155, 190 cm depth with altogether 86 gas probes. Additionally emission 20 closed chambers surface. Concurrently temperature water content were recorded order to quantify their effects fate soil. Results continuous measurements between January December 2006 were: concentrations highest deeper soil; maximum found 80 cm, where high transport reduced. The after ‘special events’ like snowmelt, heavy rain, fertilization, grubbing. combination fertilization rain led an increase up 2,700 ppb subsoil.