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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (3): 42-48.doi: 10.11924/j.issn.1000-6850.casb2022-0164

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Bacillus subtilis 262XY2' Bacterial Fertilizer: Effects on the Growth and Physiological Characteristics of Tomato Seedlings

AO Yuan(), YANG Chengde(), GUO Zhuangyuan, CAI Fengfeng, CUI Lingxiao   

  1. College of Plant Protection, Gansu Agricultural University/Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou 730070
  • Received:2022-03-09 Revised:2022-05-02 Online:2023-01-25 Published:2023-02-01

Abstract:

The objectives of this study are to determine the optimal application concentration of Bacillus subtilis 262XY2' bacterial fertilizer and provide a theoretical basis for its practical application. Tomato and Bacillus subtilis 262XY2' bacterial fertilizer were used as test materials, and the growth and physiological indexes of tomato were determined by morphological observation and spectrophotometer determination. The results showed that 0.5%-2% bacterial fertilizer treatment had the best growth physiological indexes. The ratio of seedling emergence rate, plant height, stem diameter, leaf area, fresh and dry weight of aboveground and underground parts, strong seedling index, growth function, root-shoot ratio, the content of chlorophyll a and b, carotenoid content, root vigor and soluble protein content were 11.115%, 14.589%, 35.616%, 91.704%, 49.369%, 48.330%, 86.634%, 85.714%, 71.429%, 50.000%, 59.164%, 86.887%, 156.827%, 10.589%, 7.035% and 54.294% higher than those of CK, respectively, and the lowest value of relative conductivity after treatment at -20℃ and 40℃ were 6.483% and 3.116% lower than that of CK, respectively. In summary, the application of 0.5%-2% Bacillus subtilis 262XY2' bacterial fertilizer can promote tomato growth, and the 0.5% bacterial fertilizer treatment group has the most significant effect on tomato growth.

Key words: Bacillus subtilis 262XY2' bacterial fertilizer, tomato, growth-promoting effect, growth characteristics, physiological characteristics