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Table 2 Changes in microbial diversity after the applications of biochar and biofertilizer

From: Application of cotton straw biochar and compound Bacillus biofertilizer decrease the bioavailability of soil cd through impacting soil bacteria

Cd
(mg·kg−1)
Modifiers
(%)
Diversity index of soil microbial community
Simpson Chao1 Coverage
H0 T 0.0070±0.0002 f 1801±51.99 e 0.9853±0.028 a
B 0.0117±0.0003 c 2165±62.48 bcd 0.9819±0.028 a
J 0.0095±0.0003 d 2119±61.17 cd 0.9820±0.028 a
H1 T 0.0059±0.0002 g 1964±56.69 de 0.9835±0.028 a
B 0.0070±0.0002 f 2030±58.61 d 0.9841±0.028 a
J 0.0128±0.0004 b 2397±69.22 a 0.9809±0.028 a
H2 T 0.0057±0.0002 g 2083±60.13 cd 0.9824±0.028 a
B 0.0095±0.0005 d 2453±70.81 a 0.9800±0.028 a
J 0.0086±0.0004 de 2277±65.74 abc 0.9799±0.028 a
H3 T 0.0078±0.0004 ef 2333±67.36 ab 0.9797±0.028 a
B 0.0090±0.0003 d 2251±64.99 abc 0.9811±0.028 a
J 0.0315±0.0009 a 2251±64.98 abc 0.9806±0.028 a
Regression Analysis
H ns * **
BJ ns * **
BJ*H ns * **
  1. T, no application of modifiers; B, 3% biochar was applied; J, 1.5% biofertilizer was applied; H0, no application of Cd; H1, 1 mg·kg−1 of Cd was applied; H2, 2 mg·kg−1 of Cd was applied; H3, 4 mg·kg−1 of Cd was applied. Different lowercase letters in the same column indicate significant differences (P < 0.05) in Cd content. **, P < 0.01; *, 0.01 < P < 0.05; ns, P ≥ 0.05