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| Effects of salt stress on microbial biomass and enzymeactivities in rhizospheric soil of sugarcane |
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| DOI：10.16768/j.issn.1004-874X.2016.06.018 |
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| Abstract: |
| This study measured the microbial population size，enzyme activity and their relationship in rhizospheric
soil of sugarcane at four different salt stress levels with four sugarcane varieties as materials. The results showed that，
under the salt stress levels of 0.0%，0.2%，0.5%，0.8%，the sugarcane rhizospheric soil bacteria，actinomycetes，fungi
number and urease，sucrase，catalase enzyme activity reduced significantly with the increase of salt stress，especially
the differences between salt stress and no salt stress were extremely significant. These indicated that the sugarcane
rhizospheric soil microbial population was sensitive to salt stress，their growth inhibited，a sharp reduction was found
in the number，and the soil enzyme activities had the same performances. Correlation，partial correlation and canonical
correlation analysis showed that under saline stress，there was a significant linear correlation and canonical correlation
between sugarcane rhizospheric soil microbial biomass and enzyme activity. There was a significant partial correlation
between actinomycetes number and invertase，catalase activity，as well as urease activity and invertase activity. |
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