Fig. 3From: Flow velocity and nutrients affect CO2 emissions from agricultural drainage channels in the North China PlainDIC depletion (a–d) and TOC generation (e–h) in each container over time among four treatments, the dashed lines in a–d show the exponential fits (p < 0.001), and the dashed lines in e–h show the linear fits with p values and colored areas indicate 95% confidence intervalsBack to article page