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Table 4 Diversity indices of amoA-AOA, amoA-AOB, nirK, nirS, and nosZ communities under different salt and alkali stresses 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

  Chao1 Shannon
amoA-AOA amoA-AOB nirK nirS nosZ amoA-AOA amoA-AOB nirK nirS nosZ
CK 43.51 a 486.03 a 425.56 a 324.68 b 194.53 c 2.07 ab 2.60 a 4.80 a 4.40 b 0.67 a
CS 43.90 a 543.02 a 360.05 b 372.77 a 263.40 b 1.80 b 1.90 b 4.04 c 5.09 a 0.62 a
SS 41.62 a 516.82 a 362.20 b 402.67 a 367.40 a 2.53 a 1.82 b 3.93 c 5.19 a 0.69 a
AS 33.42 b 258.74 b 413.12 a 396.40 a 326.62 a 2.50 a 2.61 a 4.31 b 4.24 b 0.65 a
  1. CK, control treatment without salt or alkali stress; CS, NaCl stress treatment; SS, Na2SO4 stress treatment; and AS, Na2CO3 + NaHCO3 stress treatment. Different lowercase letters in the same column indicate significant differences among treatments (P < 0.05)