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dc.contributor.authorKutu, Funso Raphael.en_US
dc.descriptionPlease note that only UMP researchers are shown in the metadata. To access the co-authors, please view the full text.en_US
dc.description.abstractPurpose: This study assessed changes in bio-quality indices and plant available P released during aerobic–thermophilic cocomposting of different mix ratios of non-reactive ground phosphate rock (GPR) with poultry and cattle manures. Methods: Aerobic–thermophilic co-composting of different mix ratios (5:5, 8:2, 7:3 and 9:1) of non-reactive GPR with poultry and cattle manures was carried out. Compost piles without GPR addition were included as control. Compost samples were taken at mesophilic, thermophilic, cooling–stabilization and maturing phases for microbial counts, enzyme activities and P assessment. Results: Abundance of different microbial groups across the composting phases varied greatly (p < 0.001) mostly dominated by fungi that was generally more in the cattle than poultry manure-based phospho-composts. Fungi and actinomycetes counts in the composts were positively correlated with alkaline phosphatase and β-glucosidase. A strong inter-correlation between β-glucosidase and alkaline phosphatase (r = 1.000, p < 0.001) was observed, suggesting that both enzymes possess same origin. Alkaline phosphatase and β-glucosidase contents in the phospho-composts showed negative correlation with water soluble P (r = − 0.65, p < 0.001), and Bray P1 and Fe–P contents (r = − 0.15, p > 0.05) indicating inhibition of the P forms. Quantitatively higher P was obtained from poultry manure-based phospho-compost and in the 8:2 mix ratio at compost maturity. Microbial diversity and enzyme activity exerted positive impact on P mineralization and availability from the non-reactive GPR signifying the beneficial effect of co-composting. Conclusions: Co-composting of P-rich non-reactive GPR with organic wastes containing variable chemical composition promotes microbial diversity during composting and increases plant available P content and compost fertilizer value.en_US
dc.relation.ispartofInternational Journal of Recycling of Organic Waste in Agriculture.en_US
dc.subjectCompost bio-quality indices.en_US
dc.subjectEnzyme activities.en_US
dc.subjectAvailable P.en_US
dc.subjectNon-reactive phosphate rock.en_US
dc.titleAssessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho‑compost production.en_US
dc.typejournal articleen_US
dc.contributor.affiliationSchool of Agricultural Sciencesen_US
item.openairetypejournal article-
item.fulltextWith Fulltext-
item.cerifentitytypePublications- of Agricultural Sciences-
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