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dc.contributor.authorRabelani, Munyai
dc.contributor.authorOgola, Henry Joseph Oduor
dc.contributor.authorKimani, Virginia Wambui
dc.contributor.authorModise, David Mxolisi
dc.date.accessioned2024-03-26T09:57:40Z
dc.date.available2024-03-26T09:57:40Z
dc.date.issued2024
dc.identifier.citationMunyai, R et al. 2024. Unlocking water potential in drylands: Quicklime and fly ash enhance soil microbiome structure, ecological networks and function in acid mine drainage water-irrigated agriculture. Heliyon, 10 (2024) e27985. [https://doi.org/10.1016/j.heliyon.2024.e27985].en_US
dc.identifier.urihttp://hdl.handle.net/10394/42446
dc.identifier.urihttps://doi.org/10.1016/j.heliyon.2024.e27985
dc.description.abstractIn water-stressed regions, treated acid mine drainage (AMD) water for irrigated agriculture is a potential solution to address freshwater scarcity. However, a significant knowledge gap exists on the short and long-term effects of treated AMD water on soil health. This study used high-throughput Illumina sequencing and predictive metagenomic profiling to investigate the impact of untreated AMD (AMD), quicklime- (A1Q and A2Q) and quicklime and fly ash-treated AMD water (AFQ) irrigation on soil bacterial diversity, co-occurrence networks and function. Results showed that untreated AMD water significantly increased soil acidity, electrical conductivity (EC), sulfate (SO42−), and heavy metals (HM), including reduced microbial diversity, disrupted interaction networks, and functional capacity. pH, EC, Cu, and Pb were identified as key environmental factors shaping soil microbial diversity and structure. Predominantly, Pseudomonas, Ralstonia picketti, Methylotenera KB913035, Brevundimonas vesicularis, and Methylobacterium oryzae, known for their adaptability to acidic conditions and metal resistance, were abundant in AMD soils. However, soils irrigated with treated AMD water exhibited significantly reduced acidity (pH > 6.5), HM and SO42− levels, with an enrichment of a balanced bacterial taxa associated with diverse functions related to soil health and agricultural productivity. These taxa included Sphingomonas, Pseudoxanthomonas, Achromobacter, Microbacterium, Rhodobacter, Clostridium, Massillia, Rhizobium, Paenibacillus, and Hyphomicrobium. Moreover, treated AMD water contributed to higher connectivity and balance within soil bacterial co-occurrence networks compared to untreated AMD water. These results show that quicklime/fly ash treatments can help lessen impacts of AMD water on soil microbiome and health, suggesting its potential for irrigated agriculture in water-scarce regions.en_US
dc.language.isoenen_US
dc.publisherHeliyonen_US
dc.subjectAcid mine drainageen_US
dc.subjectMicrobial diversityen_US
dc.subjectRemediationen_US
dc.subjectBacterial community structureen_US
dc.subjectIrrigated agricultureen_US
dc.subjectSoil healthen_US
dc.titleUnlocking water potential in drylands: Quicklime and fly ash enhance soil microbiome structure, ecological networks and function in acid mine drainage water-irrigated agricultureen_US
dc.typeArticleen_US


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