Fig. 3From: Saline and alkaline stresses alter soil properties and composition and structure of gene-based nitrifier and denitrifier communities in a calcareous desert soilRegressions of the relations between potential nitrification rate (μg NO2-N g− 1 h− 1) and gene copy numbers (log no. g− 1 dry soil) of a amoA-AOA communities and b amoA-AOB communities in a calcareous desert soilBack to article page