Characteristics and Influencing Factors of Microbial Community in Heavy Metal Contaminated Soil under Silicon Fertilizer and Biochar Remediation

Silicon fertilizer and biochar have been widely used to remediate soil contaminated by heavy metals. The effects mechanism of silicon addition on the metal availability, biological properties, microbial community characteristics need further study in soils Therefore, this research determined how fertilizer, biochar, their combined using affected communities related with nitrogen phosphorus cycling. abundance composition were evaluated quantitative PCR phospholipid fatty acid analysis, respectively. Results showed that significantly changed including pH, total organic carbon, ammonium, nitrate. Cd Zn speciation reduced integrated application. Microbial structure also changed. Principal component analysis shows difference is most obvious under biochar. In addition, results fluorescence number bacteria was reduced. This reveals influence bacterial fungal effect availability.