Co-Inoculation of Rhizobacteria and Biochar Application Improves Growth and Nutrientsin Soybean and Enriches Soil Nutrients and Enzymes
2020
Dilfuza Jabborova | Stephan Wirth | Annapurna Kannepalli | Abdujalil Narimanov | Said Desouky | Kakhramon Davranov | R. Z. Sayyed | Hesham El Enshasy | Roslinda Abd Malek | Asad Syed | Ali H. Bahkali
Gradual depletion in soil nutrients has affected soil fertility, soil nutrients, and the activities of soil enzymes. The applications of multifarious rhizobacteria can help to overcome these issues, however, the effect of co-inoculation of plant-growth promoting rhizobacteria (PGPR) and biochar on growth andnutrient levelsin soybean and on the level of soil nutrients and enzymes needs in-depth study. The present study aimed to evaluate the effect of co-inoculation of multifarious <i>Bradyrhizobium japonicum</i> USDA 110 and <i>Pseudomonas putida</i> TSAU1 and different levels (1 and 3%) of biochar on growth parameters and nutrient levelsin soybean and on the level of soil nutrients and enzymes. Effect of co-inoculation of rhizobacteria and biochar (1 and 3%) on the plant growth parameters and soil biochemicals were studied in pot assay experiments under greenhouse conditions. Both produced good amounts of indole-acetic acid; (22 and 16 µg mL<sup>−1</sup>), siderophores (79 and 87%SU), and phosphate solubilization (0.89 and 1.02 99 g mL<sup>−1</sup>). Co-inoculation of <i>B. japonicum</i> with <i>P. putida</i> and 3% biochar significantly improved the growth and nutrient content ofsoybean and the level of nutrients and enzymes in the soil, thus making the soil more fertile to support crop yield. The results of this research provide the basis of sustainable and chemical-free farming for improved yields and nutrients in soybean and improvement in soil biochemical properties.
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