Journal
BIORESOURCE TECHNOLOGY
Volume 241, Issue -, Pages 134-141Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.05.099
Keywords
Composting; Different stages inoculation; Phosphate-solubilizing bacteria (PSB); Denaturing gradient gel electrophoresis (DGGE); Potential available phosphorus (PAP)
Funding
- National Natural Science Foundation of China [51378097]
- National Key Technology RD Program [2012BAJ21B02-02]
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This study aimed to assess the effect of phosphate-solubilizing bacteria (PSB) application and inoculation methods on rock phosphate (RP) solubilization and bacterial community during composting. The results showed that PSB inoculation in different stages of composting, especially both in the beginning and cooling stages, not only improved the diversity and abundance of PSB and bacterial community, but also distinctly increased the content of potential available phosphorus. Redundancy analysis indicated that the combined inoculation of PSB in the initial stage with higher inoculation amount and in the cooling stage with lower inoculation amount was the best way to improve the inoculation effect and increase the solubilization and utilization of RP during composting. Besides, we suggested three methods to improve phosphorus transformation and long-term utilization efficiency in composts based on biological fixation of phosphates by humic substance and phosphate-accumulating organisms. (C) 2017 Elsevier Ltd. All rights reserved.
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