Notice of RetractionResponses of soil microbial to long-term elevated CO2 in Pinus sylvestriformis and Pinus koraiensis Seedlings Fields

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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Responses of soil microbial to elevated CO₂ in Pinus sylvestriformis and Pinus koraiensis Seedlings Fields in summer were investigated. The results indicated bacterial numbers increased significantly (p ≤ 0.05) at elevated CO₂ for Pinus sylvestriformis, and it decreased significantly (p ≤0.05) with CO₂ enrichment for Pinus koraiensis. As such, the size of soil microbial biomass C also decreased significantly at 700 μmol/mol CO₂. Bacterial community structure changed evidently under elevated CO₂ compared to ambient through DGGE (Denaturing Gradient Gel Electrophoresis) analysis of bacterial 16S rDNA gene fragments amplified by PCR from DNA extracted directly from soil. Our result also suggested that response of microbial to CO₂ enrichment was relate to plant species exposed to elevated CO₂.