Figure 5

Redundancy discrimination analysis (RDA) depicting the relationship between the main soil physico-chemical parameters, soil enzymes and microorganism in the rhizosphere soil of maize (M) and rice (R) in different saline–alkali fields (Nit., Nitrospirae; Pla., Planctomycetes; Pro., Proteobacteria; Gem., Gemmatimonadetes; Aci., Acidobacteria; Chl., Chloroflexi; Oth., Other; Act., Actinobacteria; Unc.,Unclassified; Fir., Firmicutes; β-glu., β-glucosidase; Can., Candidate-division-TM7; Ver., Verrucomicrobia; Bac., Bacteroidetes; Amy., Amylase; Cat., Catalase).