Abstract
The effect of elevated surface O3concentration(~70 nmol mol-1) on soil microbial functional diversity was investigated by determining water-solution organic carbon(WSOC) content,soil respiration intension and BIOLOG in China O3-FACE(Free-air ozone concentration enrichment) field based on a rice/wheat rotation system.The results showed that with the enhancing of O3concentration,the WSOC content,soil respiration intension and AWCD(average well colour development) were significantly increased(P0.05).Diversity indexes showed that with the enhancing of O3 concentration,Shannon and Simpson indices had no differences,but McIntosh indices was significantly increased(P0.05).The PCA results showed that the elevated O3 concentration significantly affected the soil microbial ability of utilizing glucide and better than any other substrates.This research suggested that elevated O3 concentration(~70 nmol mol-1) significantly increased soil microbial functional diversity in wheat field.
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