《Table 4 Critical thresholds of community diversities of soil bacteria, fungi and Bacillus in respon

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《Soil microbial activity and community structure as affected by exposure to chloride and chloride-sulfate salts》

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Note:a，chloride saline was a mixture of Ca Cl2 and Na Cl；b，mixed saline was a mixture of Ca Cl2 and Na2SO4；c，comparison the fitting of the community diversities to soil EC induced by the Cl–or Cl–/SO42–salt.Where P<0.05，segmental linear of AWCD and

The dissimilarities of carbon metabolic profiles（Figs.4a and b）and community structures of bacteria，fungi and Bacillus（Figs.4c–h）with Cl–or mixed Cl–/SO42–addition were shown in n MDS（non-metric multidimensional scaling ordinations）plots.Salt type had no obvious influence on soil physiological profiles（Table 3），however，salt levels（alteration of soil EC1:5）highly impacted on soil physiological profiles（P=0.004）.The strong shifts in soil physiological profile occurred with both Cl–and mixed Cl–/SO42–salts（Figs.4a and b）.In terms of soil community-level physiological profiles（AWCD value），the threshold values were 1.26 d S/m for mixed Cl–/SO42–salt and 0.45 d S/m for Cl–salt indicating that the threshold concentrations of ECwere 1.26 and 0.45 d S/m for mixed Cl–/SO42–and Cl–salts.