Fig. 3From: Chronic fertilization of 37 years alters the phylogenetic structure of soil arbuscular mycorrhizal fungi in Chinese MollisolsRedundancy analysis of soil AMF communities and soil properties. Soil factors indicated in red text include available phosphorus (AP), available potassium (AK), pH, soil concentration of NH4+ (NH4+), soil concentration of NO3− (NO3−), total nitrogen (TN) and organic matter (OM). Treatment: (triangle) CK, no fertilizer; (circle) M, manure; (square) NPK, inorganic phosphorus, potassium and nitrogen fertilizer; (cross) MNPK, inorganic P, K and N fertilizer plus manureBack to article page