Figure 3.

Demonstration of O₂, CO₂, NO, N₂O, and N₂ gas kinetics during three incubation phases (Phase Oxic, Phase I, and Phase II). The results shown are single vial results for a soil with high pH (Shouguang MN_high treatment with pH 6.46; top panel) and a soil with low pH (Qiyang CK treatment, pH 4.88; lower panel). The O₂ concentration during Phase Oxic is shown as vol% in the headspace, CO₂ and N₂ are shown as cumulative production (nmol g⁻¹ soil dry weight), whereas the intermediate denitrification products NO and N₂O are shown as measured (nmol g⁻¹ soil dry weight).