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ORIGINAL RESEARCH article

Front. Microbiol.
Sec. Microbe and Virus Interactions with Plants
Volume 15 - 2024 | doi: 10.3389/fmicb.2024.1451514
This article is part of the Research Topic Mineral Solubilizing Microorganisms (MSM) and Their Applications in Nutrient Bioavailability, Bioweathering and Bioremediation, Vol III View all 5 articles

Nitrogen uptake, grain yield and oil concentration of dwarf castor beans under nitrogen rates and inoculation of rhizobacteria in grasses-legumes rotation

Provisionally accepted
Isabela Gato Isabela Gato 1Carlos E. Oliveira Carlos E. Oliveira 1Arshad Jalal Arshad Jalal 1*Vitória d. Moreira Vitória d. Moreira 1Amr H. Hashem Amr H. Hashem 2Bruno H. Lima Bruno H. Lima 1Gabriel Da Silva Leite Gabriel Da Silva Leite 1Abdulaziz Al-Askar Abdulaziz Al-Askar 3Leandro A. Freitas Leandro A. Freitas 1Hamada AbdElgawad Hamada AbdElgawad 4Selton V. Ferreira Selton V. Ferreira 1Leticia d. Santana Leticia d. Santana 1Andréa Bastos Andréa Bastos 1Fernando S. Galindo Fernando S. Galindo 5Tiago Zoz Tiago Zoz 6Marcelo C. Teixeira Filho Marcelo C. Teixeira Filho 1*
  • 1 Faculty of Engineering, São Paulo State University, Ilha Solteira, Brazil
  • 2 Faculty of Science, Al Azhar University, Cairo, Beni Suef, Egypt
  • 3 Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
  • 4 Laboratory for Integrated Molecular Plant Physiology Research, Department of Biology, Faculty of Sciences, University of Antwerp, Antwerp, Antwerp, Belgium
  • 5 Faculty of Agricultural Sciences and Technology, Department of Plant Production, São Paulo State University (UNESP), dracena, SP, Brazil
  • 6 State University of Mato Grosso do Sul, Dourados, Mato Grosso do Sul, Brazil

The final, formatted version of the article will be published soon.

    Plant growth-promoting bacteria (PGPBs) has primarily studied for atmospheric nitrogen (N) fixation but it also has the capacity to improve nutrition and yield of crop plants.Therefore, the objective of this research was to investigate the effects of inoculation with PGPBs in association with different N rates on N uptake, grain yield and oil concentration of dwarf castor beans in succession to legumes and grasses in Ilha Solteira, Brazil. The treatments consisted of N rates (0 to 180 kg ha -1 of N) and inoculation with three plant growth-promoting bacteria (Azospirillum brasiliense, Bacillus subtilis and Pseudomonas fluorescens, applied by leaf) and a control with no-inoculation. The grain and oil yields of castor beans were increased by 20 and 40% at the rate of 103 kg ha -1 of N in succession to grasses as compared to without N application. In addition, grain yield of castor bean after legumes was increased by 28, 64 and 40% with estimated rates of 97, 113 and 92 kg ha -1 of N in combination with inoculations of A. brasilense, B. subtilis and P. fluorescens Field Code Changed as compared to without N application, respectively. Shoot, grain, and total N uptake were improved with foliar inoculation of A. brasilense, B. subtilis and P. fluorescens at the N rates of 45, 90 and 135 kg ha -1 respectively. Topdressing of N at the rate of is 103 kg ha - 1 and foliar inoculation in succession to grasses and 180 kg ha -1 of N without the effect of foliar inoculation in succession to legumes are recommended for higher grain and oil yield of castor beans. Foliar inoculations with A. brasilense, B. subtilis and P. fluorescens increased grain yield under reduced use of N fertilizer by 44, 37 and 49% in dwarf castor cultivation in succession to legumes, potentially contribute to sustainable agriculture.

    Keywords: Ricinus communis L., nitrogen fertilization, Azospirillum brasilense, Bacillus subtilis, Pseudomonas fluorescens, Oil yield

    Received: 19 Jun 2024; Accepted: 02 Aug 2024.

    Copyright: © 2024 Gato, Oliveira, Jalal, Moreira, Hashem, Lima, Da Silva Leite, Al-Askar, Freitas, AbdElgawad, Ferreira, Santana, Bastos, Galindo, Zoz and Teixeira Filho. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Arshad Jalal, Faculty of Engineering, São Paulo State University, Ilha Solteira, 15385-000, Brazil
    Marcelo C. Teixeira Filho, Faculty of Engineering, São Paulo State University, Ilha Solteira, 15385-000, Brazil

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