Soil Air Carbon Dioxide Concentrations in a New England Spruce-Fir Forests

摘要

Research and modeling efforts to evaluate soil-soil solution chemical interactions must take into account solution equilibria with soil air CO2. Measurements of soil air CO2 and soil temperature were made in the major horizons of a forest soil in eastern Maine through the 1985 growing season. Soil air CO2 concentrations ranged from 0.10 to 0.35%, 0.10 to 1.25%, and 0.20 to 1.20% in the O, B, and C horizons respectively. Peak soil air CO2 concentration occurred in July and early October which coincide with high points in soil temperature during the growing season. (Copyright (c) Soil Sci. Am. J., 1987.)