ACTA AGRICULTURAE BOREALI-SINICA ›› 2013, Vol. 28 ›› Issue (2): 202-208. doi: 10.3969/j.issn.1000-7091.2013.02.036

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Screening, Identification and Sporulation Conditions Optimization of NX-11 Strain Having the Ability of Solubilizing Phosphorus and Potassium

MA Rui-yang1, ZHANG Ai-min2,3, HUI Xiao-shuang1, DAI Meng1, WANG Wen1, ZHU Bao-cheng1   

  1. 1. College of Life Science, Agricultural University of Hebei, Baoding 071001, China;
    2. Biological Technology Center of Hebei University, Baoding 071001, China;
    3. College of Plant Protection, Agricultural University of Hebei, Baoding 071001, China
  • Received:2013-01-18 Published:2013-04-28

Abstract: Bacteria having the efficient activity on solubilizing phosphate and potassium have been isolated for its utilization as a biological fertilizer. The most efficient strain named NX-11 was chosen for further study. NX-11 was identified as Bacillus subtilis after a series of physiological and biochemical experiments,morphological observa-tion and 16S rRNAgene sequence analysis. The solubilization ability of NX-11 was tested in the condition of pure cul-ture. The results showed that the optimal medial components were composed of 5.0% starch,1.5% soybean cake powder,0.07%mgSO4,0.05% NaCl. The optimal culture conditions were at temperature 37℃ with initial pH 8. 0 and incubation time 20 h,inoculum's volume 40mL/L,medium volume 30mL in 250mL flask and 200 r/min.

Key words: Bacillus subtilis, Phosphate solubilization, Potassium solubilization, Orthogonal test

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Cite this article

MA Rui-yang, ZHANG Ai-min, HUI Xiao-shuang, DAI Meng, WANG Wen, ZHU Bao-cheng. Screening, Identification and Sporulation Conditions Optimization of NX-11 Strain Having the Ability of Solubilizing Phosphorus and Potassium[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(2): 202-208. doi: 10.3969/j.issn.1000-7091.2013.02.036.

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