›› 2020, Vol. 32 ›› Issue (11): 2035-2041.DOI: 10.3969/j.issn.1004-1524.2020.11.14

• Environmental Science • Previous Articles     Next Articles

Preparation of coal gangue fertilizer based on high-efficiency phosphate solubilizing bacteria and its application potential

WANG Yinglan, JIANG Xiong, JI Li, ZHANG Jingning, XIE Chengwei*   

  1. School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China
  • Received:2020-04-28 Online:2020-11-25 Published:2020-12-02

Abstract: In this study, coal gangue was treated with high-efficiency phosphate solubilizing bacteria to prepare fertilizer. A strain named GZU-Mic02 with phosphate solubilizing ability was isolated from the weathered coal gangue, which was identifiied as Micrococcus luteus. Compared with the untreated coal gangue samples, the contents of available nitrogen, available phosphorus and available potassium of the prepared coal gangue fertilizers treated with GZU-Mic02 and Bacillus megaterium strain ACCC1011 were increased. The prepared coal gangue fertilizer treated with GZU-Mic02 had higher contents of available phosphorus and available nitrogen than the prepared coal gangue fertilizer treated with Bacillus megaterium, yet the content of available potassium was higher in the prepared coal gangue fertilizer treated with Bacillus megaterium. The pot experiment was conducted with tobacco to verify the effect of the prepared coal gangue fertilizer. It was shown that the plant height, stem circumference and leaf size of tobacco grown after 25 d with the two kinds of prepared coal gangue fertilizer were higher than those in the control without fertilizer, and the effect of prepared coal gangue fertilizer treated with GZU-Mic02 strain was better.

Key words: coal gangue, Micrococcus luteus, Bacillus megaterium, fertilizer, tobacco

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