Minjingu phosphate rock solubilization and potential for use of klebsiella variicola-mde4 and klebsiella variicola-mdg1 as biofertilizer for maize production

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dc.contributor.authorKwaslema, Damiano
dc.contributor.authorTindwa, Hamisi
dc.contributor.authorAmuri, Nyambilila
dc.date.accessioned2023-07-11T07:40:05Z
dc.date.available2023-07-11T07:40:05Z
dc.date.issued2022
dc.descriptionJournal Articleen_US
dc.description.abstractLimited solubility of the Tanzania’s Minjingu phosphate rock (MPR) in non-acidic soil conditions has held back its potential for widespread use in agricultural production. This study was designed to isolate, characterize and test phosphate-solubilizing bacteria for their potential to increase solubility of MPR and enhance maize plant growth under field conditions. Ten out of 19 isolates showing greatest phosphate solubilization indices on a Pikovskaya agar medium were further characterized for other plant-growth promoting traits including production of IAA, siderophores and ammonia. Two of them, namely isolates-MdE4 and MdG1 substantially outperformed other isolates in phosphate solubilization and production of IAA, ammonia and siderophores. The two isolates molecularly identified as Klebsiella variicola-MdE4 and K. variicola-MdG1 produced up 701, 699 and 750, 680 µg/ml of soluble phosphate from tricalcium phosphate and hard Minjungu rock phosphate, respectively. Additionally, Biorock P- a biofertilizer formulation containing MdE4 and MdG1 co-cultured in a molasses-based modified broth medium retained most of the phosphate solubilizing potential and other plant-growth promoting traits of MdE4 and MdG1. Co-application of MdE1 and MdG1-containing “bio-rock P” and inorganic phosphate at 20 kg P/ha resulted in higher maize grain yield than that of positive control (40 kg P/ha) under field conditions. The two isolates- Klebsiella variicola-MdE4 and K. variicola-MdG1 have the potential for use in a biofertilizer formulation for commercial field applications.en_US
dc.identifier.urihttp://www.suaire.sua.ac.tz/handle/123456789/5355
dc.language.isoenen_US
dc.publisherJournal of Central European Agricultureen_US
dc.subjectRock phosphate biofertilizeren_US
dc.subjectBiofertilizer formulationen_US
dc.subjectPlant growth promoting bacteriaen_US
dc.subjectInoculanten_US
dc.titleMinjingu phosphate rock solubilization and potential for use of klebsiella variicola-mde4 and klebsiella variicola-mdg1 as biofertilizer for maize productionen_US
dc.typeArticleen_US

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