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Table 2 Pearson coefficients of correlation between soil properties and copy numbers of the genes amoA-AOA, amoA-AOB, nirK, nirS, and nosZ in a calcareous desert soil

From: Saline and alkaline stresses alter soil properties and composition and structure of gene-based nitrifier and denitrifier communities in a calcareous desert soil

Item PNR amoA-AOA amoA-AOB nirK nirS nosZ
SWC −0.675 a −0.658 a −0.179 0.026 0.250 0.712 b
EC1:5 −0.604 a −0.563 −0.015 0.094 0.142 0.813 b
pH −0.673 a −0.662 a −0.918 b 0.220 0.935 b 0.136
NH4-N −0.857 b −0.798 b −0.848 b 0.409 0.965 b 0.571
NO3-N 0.914 b 0.869 b 0.856 b −0.319 −0.942 b −0.587 a
  1. EC1:5 electrical conductivity, SWC soil water content, PNR potential nitrification rate
  2. a and b indicate significant correlations at the 0.05 and 0.01 levels (two-tailed), respectively