[Effects of sulfur on microbial activity and community structure in a lead-polluted paddy soil].

A pot experiment was conducted to study the microbial activity and community structure in a lead-polluted paddy soil under effects of amendment with different concentration sodium thiosulfate.The amendment of the sulfur-containing substrate increased the soil oxidation-reduction potential and respiration rate,promoted the growth of soil sulfur-oxidizing bacteria,and induced some changes in soil microbial community structure.The clone sequencing indicated that the specific bands of soil microbes in sodium thiosulfate treatments had very high similarity to Bateroidetes,Thiobacillus,β-proteobacteria,and Acidobacteria.Significant changes were observed in the contents of soil carbonate-and Fe/Mn oxide-bound Pb after the amendment of sodium thiosulfate.