Figure 3.
Mean CH4 emission from the soil in presence of different species plotted against plant biomass and root characteristics, (a,c,e,g) under the low water level (i.e. 5 cm below soil surface); and (b,d,f,h) under high water level (at soil surface). We tested linear, and exponential regressions and the solid lines were drawn if relationship was significant (p<0.05), dotted line for tendency (0.05≤p<0.1) and no line for insignificant relationship (p≥0.1). Note the scale differences of the x-axis.