An Evaluation Of Alkaline Hydrolyzable Organic Nitrogen As An Index Of Nitrogen Mineralization And Availability In Biochar-Manure Compost Amended Soils

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dc.contributor.authorZoglie, E.M.
dc.date.accessioned2024-04-22T12:12:58Z
dc.date.available2024-04-22T12:12:58Z
dc.date.issued2021-09
dc.descriptionMPhil. Soil Scienceen_US
dc.description.abstractThe ability to predict the amount of plant-available nitrogen (N) organic amendments can supply through mineralization are required to improve their efficient use as sources of N fertilizers. This study compared a rapid alkaline hydrolysis of organic nitrogen (ON) method for evaluating the chemical index of N mineralization in soils to the standard long-term biologically based aerobic incubation method in three contrasting soils amended with 12 different biochar-manure composts (BMCs) of varied C/N ratios. The cumulative N mineralized/hydrolyzed from the biological and chemical hydrolysis methods were fitted to the first-order exponential equation to determine the potentially mineralizable N (No) and an analogous “potentially hydrolyzable N (Nmax)” for the BMCs. Furthermore, the study also assessed the suitability of the alkaline hydrolysis method as a soil fertility index by comparing the results with actual N uptake by maize in a pot experiment. The results showed that the biological and chemical estimated No and Nmax values differed significantly among the BMCs, suggesting that the chemical composition of the BMCs affected their reactivity and decomposability. It was also observed that the No and Nmax values were positively and significantly correlated (p ≤ 0.01). The correlation between Nmax and actual N uptake by maize was also significant (p ≤ 0.05). These results indicated that the rapid chemical hydrolysis method can be interpreted broadly for both mineralization process and soil fertility assessment. It was concluded that the rapid chemical hydrolysis method offers a time-effective surrogate approach for N mineralization and N supplying capacity of soil organic amendments.en_US
dc.identifier.urihttp://ugspace.ug.edu.gh:8080/handle/123456789/41685
dc.language.isoenen_US
dc.publisherUniversity of Ghanaen_US
dc.subjectAlkaline Hydrolyzableen_US
dc.subjectBiochar-Manureen_US
dc.subjectMineralizationen_US
dc.subjectOrganic Nitrogenen_US
dc.titleAn Evaluation Of Alkaline Hydrolyzable Organic Nitrogen As An Index Of Nitrogen Mineralization And Availability In Biochar-Manure Compost Amended Soilsen_US
dc.typeThesisen_US

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