Figure 4.

Redundancy analysis (RDA) demonstrating the relationships between soil properties and fungal community structures. The red font represents the fungal phyla with top 5 abundance; the blue arrows represent different soil properties. SOC: soil organic carbon, TN: total nitrogen, Ava-P: available phosphorus, Ava-K: available potassium. 3ys: continuous cropping of flue-cured tobacco for 3 years. 5ys: continuous cropping of flue-cured tobacco for 5 years. CK: flue-cured tobacco cropping for 1 year.