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Effect of Seed Bio-priming with Trichoderma viride Strain BHU-2953 for Enhancing Soil Phosphorus Solubilization and Uptake in Soybean (Glycine max)

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The main objective of our study was to evaluate the effectiveness of Trichoderma viride BHU-2953 as a single inoculant during seed-priming to enhance phosphorus (P) uptake in soybean. A pot experiment was conducted, taking six treatments, in a completely randomized block design to assess the P uptake, root length, apparent phosphorus recovery (APR), rhizospheric phosphatase activity, pH, soil-P status, dehydrogenase activity, and fungal colony-forming unit (CFU g−1) in three different soybean growth stages through seed-priming with T. viride along with graded fertilizer P-doses. Significantly (P < 0.05) higher soil phosphatase activity, dehydrogenase activity, CFU of T. viride, and P-content in soybean vegetative parts were observed in bio-primed treatments as compared to control and RDF (full recommended dose of P-fertilizer without seed-priming), while seed-P (%), APR (%), and root lengths of RDF were found significantly (P < 0.05) lower than bio-primed soybeans with 90% RDF but were at par with 80% RDF. Higher positive correlations between CFU and acid phosphatase (R2 = 0.89, 0.9, and 0.89; P < 0.05) and between CFU and alkaline phosphatase activities (R2 = 0.98, 0.96, and 0.97; P < 0.05) at 30, 50, and 75 DAS indicate that T. viride mediated higher soil phosphatase activities. Higher P-recoveries of bio-primed soybeans, received 90% and 80% RDF, were achieved mainly due to soil applied-P solubilization through enhanced acid phosphatase activities along with better soil exploration by plant roots. Thus, seed-priming with T. viride BHU-2953 can reduce up to 20% of the recommended P-dose in soybeans.

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Acknowledgements

The authors would like to thank Prof. H. B. Singh, former Head of the Department, Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, for providing Trichoderma viride strain no. BHU-2953 and Head, Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, for necessary facilities to conduct this experiment.

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Correspondence to Amitava Rakshit.

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Paul, S., Rakshit, A. Effect of Seed Bio-priming with Trichoderma viride Strain BHU-2953 for Enhancing Soil Phosphorus Solubilization and Uptake in Soybean (Glycine max). J Soil Sci Plant Nutr 21, 1041–1052 (2021). https://doi.org/10.1007/s42729-021-00420-4

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  • DOI: https://doi.org/10.1007/s42729-021-00420-4

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