Figure 1

Mean CO2 efflux (A) and nitrification potential (B) in three soils under the non-planting and planting treatments.
N, north site in Hailun with cold temperate climate; M, middle site in Fengqiu with warm temperate climate; and S, south site in Yingtan with subtropical climate. All data are presented as the mean ± SE. **denotes a significant difference at P < 0.01 assessed using a two-tailed t test.