Abstract

Biochar is a carbon rich compound which can be used as a soil fertilizer and it enhances the microbial diversity. The present paper reveals the potential of the rhizosphere actinomycete community with plant growth promoting activities and its molecular characterization. Plant growth promoting microorganisms colonize plant roots and enhance plant growth by wide variety of mechanisms. Samples were collected from rhizosphere soil enhanced with coconut shell biochar. Assessment of various parameters for the plant growth promotion such as phosphate solubilization, nitrogen fixation, Indole Acetic Acid (IAA) production, cellulase, lipase, protease production was done with isolated organisms. The seed germination and pot trial experiment were done with plant growth promoting actinomycetes. The actinomycete that showed highest plant growth promoting activities was Streptomyces olivochromogens. Use of plant growth promoting microorganisms in agriculture field offers an attractive way to replace chemical fertilizers, pesticides and supplements.

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