Influence of analogue-resistant mutants ofAzotobacter chroococcum solubilizing phosphate on yield and quality of sunflower (Helianthus annuus) |
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| Authors: | V Kumar N Kumar Aggarwal B P Singh |
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| Institution: | (1) Department of Microbiology, Haryana Agricultural University, 125 004 Hisar, India;(2) Department of Agronomy, Haryana Agricultural University, 125 004 Hisar, India |
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| Abstract: | Two phosphate-solubilizing analogue-resistant mutants ofAzotobacter chroococcum showed a positive interactive effect on sunflower (Helianthus annuus). Plant height, leaf area, seed mass, seed yield, protein and oil content increased significantly by inoculation withA. chroococcum mutants. Both levels of fertilizers applied (80N+30P2O5 and 80N+60P2O5 kg/hm2 showed increased seed yield. Likewise, inoculation resulted in a significantly higher yield. Application ofP-solubilizingA. chroococcum strains with the lower fertilizer level showed no significant difference on plant growth parameters when compared with the
higher fertilizer level, indicating that inoculation of P-solubilizingAzotobacter strains can reduce the necessary levels of fertilization from 60P2O5 to 30P2O5 kg/hm2. |
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