Figure 6.

The effects of soil factors on soil bulk (B) and rhizosphere (A) bacterial community structure identified by RDA. TN: total nitrogen; TP: total phosphorous; TK: total potassium; AP: available phosphorous; AK: available potassium; ${\mathrm{NO}}_3^{-}$-H: nitrate nitrogen; ${\mathrm{NH}}_4^{+}$-H: ammonium nitrogen; SOC: soil organic carbon.