Methane Production and Consumption in Loess Soil at Different Slope Position

Figure 3

Relationships between total gases produced or consumed over time and organic carbon (C_org) in soils collected from different slope positions. (a) CH₄ produced in flooded soils versus C_org; (b) CO₂ produced and O₂ consumed in flooded soils versus C_org (𝑦=7.60⋅Ln(𝑥)+14.1, 𝑅²=0.92***) and (𝑦=88.4⋅Ln(𝑥)+138.7, 𝑅²=0.93***); respectively, (c) CO₂ produced and O₂ consumed in wet soils enriched with CH₄ soils versus C_org (𝑦=78.1⋅Ln(𝑥)+165.2, 𝑅²=0.74***) and (𝑦=4.38⋅Ln(𝑥)+4.60, 𝑅²=0.92*), respectively. Points present mean values. *** and *, 𝑃<0.001 and 𝑃<0.05, respectively.

(a)

(b)

(c)