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Journal of Tea Science ›› 2018, Vol. 38 ›› Issue (1): 78-86.doi: 10.13305/j.cnki.jts.2018.01.008

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Screening, Identification and Fertilizer Efficiency of Potassium Bacterium from the Soils of Tea Garden in Shandong

HAN Xiaoyang1,2, ZHOU Bo3, DONG Yuhui1,2, ZHANG Lixia1,2,*, HOU Jian4, XIANG Qinzeng1,2, HUANG Xiaoqin1,2,*   

  1. 1. College of Horticulture Science and Engineering, Shandong Agriculture University, Tai'an 271018, China;
    2. State key Laboratory of Crop Biology, Tai'an 271018, China;
    3. Tai'an Agricultural Bureau, Tai'an 271018, China;
    4. Tea Industry Administration Office of Lanshan, Rizhao 276800, China
  • Received:2017-06-05 Revised:2017-08-01 Online:2018-02-15 Published:2019-08-28

Abstract: The potassium bacterium suitable for soil environment in Shandong tea garden was screened to improve the transformation efficiency of soil potassium. By the experimental procedure of enrichment culture and microbial purification, 9 potassium bacterium strains were obtained from the soil of tea garden in Shandong Province. According to the activity comparison and taxonomy of strains, a strain with the highest activity was selected. The strain K2 was identified as Bacillus subtilis. Meanwhile, the effects of growth environment of the strains were measured. The results showed that the optimum pH and temperature for K2 were 6.0 and 35℃. It was suitable for K2 to ferment with maltose, starch and corn flour as the carbon source, and with yeast extract as the nitrogen source. After applying the bacteria agent, the contents of available potassium and phosphorus in tea garden soil increased by 28.40% and 28.49% respectively. Meanwhile the tea yield increased by 36.30%. The amino acid contents in tea were also significantly increased, and the polyphenols/amino acids decreased, which benefit tea quality. The K2 may be a high efficient potassium bacterium in tea garden soil, which can be used as a reference for further research on special microbial inoculum in tea garden.

Key words: tea garden in Shandong, potassium bacterium, Bacillus subtilis, fertilizer efficiency

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