Predicting nitrogen mineralization potential and availability of biochar-based agro-municipal solid waste co-compost using alkaline hydrolysis
Valorization of agro-municipal solid wastes into value-added nutrient-enriched slow-release organic amendments (OAs) for ameliorating soil fertility constraint has been proposed as an environmentally friendly and sustainable approach to managing challenges associated with disposal of organic wastes....
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Waste Management Bulletin |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949750723000548 |
| _version_ | 1797237837718880256 |
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| author | Daniel E. Dodor Millicent E. Zoglie Samuel G.K. Adiku Dilys S. MacCarthy Samuel K. Kumahor |
| author_facet | Daniel E. Dodor Millicent E. Zoglie Samuel G.K. Adiku Dilys S. MacCarthy Samuel K. Kumahor |
| author_sort | Daniel E. Dodor |
| collection | DOAJ |
| description | Valorization of agro-municipal solid wastes into value-added nutrient-enriched slow-release organic amendments (OAs) for ameliorating soil fertility constraint has been proposed as an environmentally friendly and sustainable approach to managing challenges associated with disposal of organic wastes. However, for soils receiving OAs of complex composition, such as biochar-manure-compost (BMC), the predictive knowledge needed to synchronize amount and timing of nitrogen (N) release with plant demand, thereby minimizing environmental pollution, is still lacking. This study validated results from an alkaline hydrolysis method for estimating N mineralization potential with: (i) the standard long-term N mineralization procedure and (ii) actual N uptake from soils amended with BMCs of varied C/N ratios. The alkaline hydrolysis procedure involves direct steam-distillation of BMC-soil mixtures, requiring only 40-min for estimating N mineralization potential, whereas the standard N mineralization procedure followed 26-week laboratory incubation. For both procedures, cumulative N mineralized or hydrolyzed was fitted to the first-order exponential equation to determine the potentially mineralizable N (No) and an analogous “potentially hydrolyzable N (Nmax)” for the BMCs. Nitrogen uptake by maize was evaluated in a six-week pot experiment. The results showed that Nmax and No values differed among the BMCs, indicating differences in chemical composition, and potential mineralizabilities of the BMCs. Increasing biochar content of the BMCs decreased kinetic parameters of N mineralization compared to compost alone. Estimated Nmax values significantly correlated with No (p = 0.023) and N uptake (p = 0.005), suggesting that alkaline hydrolyzable ON can replace the long-term procedure for estimating No in BMC-amended soils, reducing experimental cost and time. |
| first_indexed | 2024-04-24T17:26:06Z |
| format | Article |
| id | doaj.art-9a97698b8cf2447682c6c53e826d2bec |
| institution | Directory Open Access Journal |
| issn | 2949-7507 |
| language | English |
| last_indexed | 2024-04-24T17:26:06Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Waste Management Bulletin |
| spelling | doaj.art-9a97698b8cf2447682c6c53e826d2bec2024-03-28T06:40:26ZengElsevierWaste Management Bulletin2949-75072024-04-0121122130Predicting nitrogen mineralization potential and availability of biochar-based agro-municipal solid waste co-compost using alkaline hydrolysisDaniel E. Dodor0Millicent E. Zoglie1Samuel G.K. Adiku2Dilys S. MacCarthy3Samuel K. Kumahor4Department of Soil Science, University of Ghana, Legon, Ghana; Corresponding author.Department of Soil Science, University of Ghana, Legon, Ghana; Department of Crop and Soil Sciences, University of Georgia, Athens, USADepartment of Soil Science, University of Ghana, Legon, GhanaSoil and Irrigation Research Centre, Kpong, University of Ghana, Legon, GhanaDepartment of Soil Science, University of Ghana, Legon, GhanaValorization of agro-municipal solid wastes into value-added nutrient-enriched slow-release organic amendments (OAs) for ameliorating soil fertility constraint has been proposed as an environmentally friendly and sustainable approach to managing challenges associated with disposal of organic wastes. However, for soils receiving OAs of complex composition, such as biochar-manure-compost (BMC), the predictive knowledge needed to synchronize amount and timing of nitrogen (N) release with plant demand, thereby minimizing environmental pollution, is still lacking. This study validated results from an alkaline hydrolysis method for estimating N mineralization potential with: (i) the standard long-term N mineralization procedure and (ii) actual N uptake from soils amended with BMCs of varied C/N ratios. The alkaline hydrolysis procedure involves direct steam-distillation of BMC-soil mixtures, requiring only 40-min for estimating N mineralization potential, whereas the standard N mineralization procedure followed 26-week laboratory incubation. For both procedures, cumulative N mineralized or hydrolyzed was fitted to the first-order exponential equation to determine the potentially mineralizable N (No) and an analogous “potentially hydrolyzable N (Nmax)” for the BMCs. Nitrogen uptake by maize was evaluated in a six-week pot experiment. The results showed that Nmax and No values differed among the BMCs, indicating differences in chemical composition, and potential mineralizabilities of the BMCs. Increasing biochar content of the BMCs decreased kinetic parameters of N mineralization compared to compost alone. Estimated Nmax values significantly correlated with No (p = 0.023) and N uptake (p = 0.005), suggesting that alkaline hydrolyzable ON can replace the long-term procedure for estimating No in BMC-amended soils, reducing experimental cost and time.http://www.sciencedirect.com/science/article/pii/S2949750723000548CompostBiocharManureSoil amendmentN mineralization potentialN availability index |
| spellingShingle | Daniel E. Dodor Millicent E. Zoglie Samuel G.K. Adiku Dilys S. MacCarthy Samuel K. Kumahor Predicting nitrogen mineralization potential and availability of biochar-based agro-municipal solid waste co-compost using alkaline hydrolysis Waste Management Bulletin Compost Biochar Manure Soil amendment N mineralization potential N availability index |
| title | Predicting nitrogen mineralization potential and availability of biochar-based agro-municipal solid waste co-compost using alkaline hydrolysis |
| title_full | Predicting nitrogen mineralization potential and availability of biochar-based agro-municipal solid waste co-compost using alkaline hydrolysis |
| title_fullStr | Predicting nitrogen mineralization potential and availability of biochar-based agro-municipal solid waste co-compost using alkaline hydrolysis |
| title_full_unstemmed | Predicting nitrogen mineralization potential and availability of biochar-based agro-municipal solid waste co-compost using alkaline hydrolysis |
| title_short | Predicting nitrogen mineralization potential and availability of biochar-based agro-municipal solid waste co-compost using alkaline hydrolysis |
| title_sort | predicting nitrogen mineralization potential and availability of biochar based agro municipal solid waste co compost using alkaline hydrolysis |
| topic | Compost Biochar Manure Soil amendment N mineralization potential N availability index |
| url | http://www.sciencedirect.com/science/article/pii/S2949750723000548 |
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