Assessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho-compost production
Abstract Purpose This study assessed changes in bio-quality indices and plant available P released during aerobic–thermophilic co-composting of different mix ratios of non-reactive ground phosphate rock (GPR) with poultry and cattle manures. Methods Aerobic–thermophilic co-composting of different mi...
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OICC Press
2018-11-01
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| Series: | International Journal of Recycling of Organic Waste in Agriculture |
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| Online Access: | http://link.springer.com/article/10.1007/s40093-018-0231-9 |
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| author | F. R. Kutu T. J. Mokase O. A. Dada O. H. J. Rhode |
| author_facet | F. R. Kutu T. J. Mokase O. A. Dada O. H. J. Rhode |
| author_sort | F. R. Kutu |
| collection | DOAJ |
| description | Abstract Purpose This study assessed changes in bio-quality indices and plant available P released during aerobic–thermophilic co-composting 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. |
| format | Article |
| id | doaj-art-19d68124cd4c412fa0a96a9ba844a01f |
| institution | Kabale University |
| issn | 2195-3228 2251-7715 |
| language | English |
| publishDate | 2018-11-01 |
| publisher | OICC Press |
| record_format | Article |
| series | International Journal of Recycling of Organic Waste in Agriculture |
| spelling | doaj-art-19d68124cd4c412fa0a96a9ba844a01f2025-02-03T10:42:40ZengOICC PressInternational Journal of Recycling of Organic Waste in Agriculture2195-32282251-77152018-11-0181879710.1007/s40093-018-0231-9Assessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho-compost productionF. R. Kutu0T. J. Mokase1O. A. Dada2O. H. J. Rhode3School of Agricultural Sciences, Faculty of Agriculture and Natural Sciences, University of MpumalangaDepartment of Production, Soil Science and Agricultural Engineering, University of LimpopoFood Security and Safety Niche Research Group, North-West University Mafikeng CampusAgricultural Research Council-Grain Crops InstituteAbstract Purpose This study assessed changes in bio-quality indices and plant available P released during aerobic–thermophilic co-composting 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.http://link.springer.com/article/10.1007/s40093-018-0231-9Phospho-compostCompost bio-quality indicesEnzyme activitiesAvailable PNon-reactive phosphate rock |
| spellingShingle | F. R. Kutu T. J. Mokase O. A. Dada O. H. J. Rhode Assessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho-compost production International Journal of Recycling of Organic Waste in Agriculture Phospho-compost Compost bio-quality indices Enzyme activities Available P Non-reactive phosphate rock |
| title | Assessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho-compost production |
| title_full | Assessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho-compost production |
| title_fullStr | Assessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho-compost production |
| title_full_unstemmed | Assessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho-compost production |
| title_short | Assessing microbial population dynamics, enzyme activities and phosphorus availability indices during phospho-compost production |
| title_sort | assessing microbial population dynamics enzyme activities and phosphorus availability indices during phospho compost production |
| topic | Phospho-compost Compost bio-quality indices Enzyme activities Available P Non-reactive phosphate rock |
| url | http://link.springer.com/article/10.1007/s40093-018-0231-9 |
| work_keys_str_mv | AT frkutu assessingmicrobialpopulationdynamicsenzymeactivitiesandphosphorusavailabilityindicesduringphosphocompostproduction AT tjmokase assessingmicrobialpopulationdynamicsenzymeactivitiesandphosphorusavailabilityindicesduringphosphocompostproduction AT oadada assessingmicrobialpopulationdynamicsenzymeactivitiesandphosphorusavailabilityindicesduringphosphocompostproduction AT ohjrhode assessingmicrobialpopulationdynamicsenzymeactivitiesandphosphorusavailabilityindicesduringphosphocompostproduction |