Abstract
Zinc is a crucial micronutrient required for healthy plant growth, and a substantial amount of applied zinc in the soil has get fixed into insoluble forms. Zinc-solubilizing bacteria (ZSB) have potential alternates for enhancing the bioavailability of zinc in soil. The field experiment was carried out to evaluate the influence of Pantoea agglomerans strain ZTB17, NCBI accession number: MK773870 with graded levels of zinc fertilizer on maize. Results indicate that the application of 100% ZnSO4 + ZSB showed higher grain, stover and biological yield; however, it did not significantly differ from the treatment of 75% ZnSO4 + ZSB. These results demonstrated a 25% saving of the zinc fertilizer to maize crops owing to the application of the P. agglomerans. The response of P. agglomerans with graded levels of zinc in terms of zinc content and uptake by the plants was significantly higher over the sole utilization of inorganic zinc fertilizer. The maximum zinc concentrations in grain and straw were recorded with 100% ZnSO4 + ZSB treatment; however, it was on par with the rest of the treatments of P. agglomerans with graded levels of inorganic zinc fertilizers. Further, the study on zinc fractions revealed that exchangeable zinc, carbonate bound zinc, organically bound zinc, amorphous bound zinc, and crystalline zinc were raised. The available zinc status in the soil was increased by the application of P. agglomerans with different levels of ZnSO4 over control after the harvest of the crop.
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Significance Statement: India is among the nations with the most zinc-deficient agricultural soils. Hence a field experiment was conducted to evaluate the influence of ZSB and results indicate that the use of ZSB not only showed higher grain, Stover and biological yield but also increased Zn uptake with Zn fortification.
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Verma, D., Meena, R.H., Sukhwal, A. et al. Effect of ZSB with Graded Levels of Zinc Fertilizer on Yield and Zinc Uptake Under Maize Cultivation. Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci. 93, 379–385 (2023). https://doi.org/10.1007/s40011-022-01433-4
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DOI: https://doi.org/10.1007/s40011-022-01433-4