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Dissolving mechanism of strain P17 on insoluble phosphorus of yellow-brown soil
Chuan-qing, Zhong; Guang-xiang, Cao; Wei-yi, Huang; Xing-she, Luan; Yi-fei, Yang.
  • Chuan-qing, Zhong; Shandong Jianzhu University. College of Municipal and Environmental Engineering. Jinan. CN
  • Guang-xiang, Cao; Shandong Jianzhu University. College of Municipal and Environmental Engineering. Jinan. CN
  • Wei-yi, Huang; Shandong Jianzhu University. College of Municipal and Environmental Engineering. Jinan. CN
  • Xing-she, Luan; Shandong Jianzhu University. College of Municipal and Environmental Engineering. Jinan. CN
  • Yi-fei, Yang; Shandong Jianzhu University. College of Municipal and Environmental Engineering. Jinan. CN
Braz. j. microbiol ; 45(3): 937-943, July-Sept. 2014. graf, tab
Article in English | LILACS | ID: lil-727024
Responsible library: BR1.1
ABSTRACT
Strain P17 was a bacterial strain identified as Bacillus megaterium isolated from ground accumulating phosphate rock powder. The fermentation broth of strain P17 and the yellow-brown soil from Nanjing Agricultural University garden were collected to conduct this study. The simulation of fixed insoluble phosphorous forms after applying calcium superphosphate into yellow-brown soil was performed in pots, while available P and total P of soil were extremely positive correlative with those of groundwater. Then the dissolving effect of strain P17 on insoluble P of yellow-brown soil was studied. Results showed that Bacillus megaterium strain P17 had notable solubilizing effect on insoluble phosphates formed when too much water-soluble phosphorous fertilizer used. During 100 days after inoculation, strain P17 was dominant. Until the 120th day, compared with water addition, available P of strain P17 inoculation treated soil increased by 3 times with calcium superphosphate addition. Besides available P, pH, activity of acid and alkaline phosphatase and population of P-solubilizing microbes were detected respectively. P-solubilizing mechanism of P-solubilizing bacteria strain P17 seems to be a synergetic effect of pH decrease, organic acids, phosphatase, etc.
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Full text: Available Index: LILACS (Americas) Main subject: Phosphorus / Soil / Bacillus megaterium / Calcium Phosphates Language: English Journal: Braz. j. microbiol Journal subject: Microbiology Year: 2014 Type: Article Affiliation country: China Institution/Affiliation country: Shandong Jianzhu University/CN

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Full text: Available Index: LILACS (Americas) Main subject: Phosphorus / Soil / Bacillus megaterium / Calcium Phosphates Language: English Journal: Braz. j. microbiol Journal subject: Microbiology Year: 2014 Type: Article Affiliation country: China Institution/Affiliation country: Shandong Jianzhu University/CN