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Cultivation of Azospirillum brasilense in Vinasse and Potential Use in Fertigation

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  • Marcelo Teixeira Silva
  • Francielli Gasparotto
  • Barbara Maria Lustri
  • Natalia Caetano Vasques
  • Natalia Ueda Yamaguchi

Abstract

Vinasse, residue from the sugar-energy sector, has been applied as a fertilizer in sugarcane fields due to its nutritional characteristics, which may reduce nitrogen fertilization, especially if associated with diazotrophic bacteria. The objective was to evaluate the use of vinasse as culture medium for Azospirillum brasilense and the chemical changes caused in the residue after bacterial colonization. The experimental design was completely randomized with 9 treatments- T0-control (nutrient broth DYGs inoculated with A. brasilense); T1- 100% vinasse inoculated with A. brasilense; T2- 75% vinasse inoculated with A. brasilense; T3- 25% vinasse inoculated with A. brasilense; T4- 50% vinasse inoculated with A. brasilense; T5- 100% vinasse; T6- 75% vinasse; T7- 25% vinasse and T8- 50% vinasse. Microbial growth was evaluated in a spectrophotometer, by turbidimetry (700nm). Chemical characterization of vinasse was carried out before bacterial inoculation and on days 1, 3, 5 and 7 after inoculation according to the methodologies of the Standard Methods for the Examination of Water and Wastewater 22 ND for the elements nitrogen (4500-Norg), phosphorus (4500-P), potassium (3030-A) and calcium (3500 Ca-B). The determination of organic matter was carried out in accordance with the technical standard NBR 13600. The bacteria A. brasilense survived and multiplied in sugarcane vinasse, causing changes such as the increase in the levels of phosphorus and nitrogen and the reduction of the organic load, mainly in pure vinasse (100%), indicating that the viability of this practice for the application of these organisms in the culture of sugar cane via fertigation.

Suggested Citation

  • Marcelo Teixeira Silva & Francielli Gasparotto & Barbara Maria Lustri & Natalia Caetano Vasques & Natalia Ueda Yamaguchi, 2020. "Cultivation of Azospirillum brasilense in Vinasse and Potential Use in Fertigation," Journal of Agricultural Studies, Macrothink Institute, vol. 8(4), pages 726-734, December.
    • Handle: RePEc:mth:jas888:v:8:y:2020:i:4:p:726-734
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    References listed on IDEAS

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    1. Palacios-Bereche, Milagros Cecilia & Palacios-Bereche, Reynaldo & Nebra, Silvia Azucena, 2020. "Comparison through energy, exergy and economic analyses of two alternatives for the energy exploitation of vinasse," Energy, Elsevier, vol. 197(C).
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    More about this item

    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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