MECHANISMS OF CARBON AND NUTRIENT RELEASE AND RETENTION IN BEECH FOREST GAPS .3. ENVIRONMENTAL REGULATION OF SOIL RESPIRATION AND NITROUS OXIDE EMISSIONS ALONG A MICROCLIMATIC GRADIENT

摘要

Fluxes of CO2 and N2O were measured along a microclimatic gradient stretching from the centre of a gap into a mature beech stand using an automated chamber method. Simultaneously the regulating factors like soil water tensions, soil temperatures, nitrate concentrations were measured along the gradient. The daily mean values of the fluxes of CO2 and N2O were divided into classes of temperature and furthermore subdivided into classes of soil water tension to assess the significance of each regulating factor.