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Título: | Carbon and nitrogen transformation during composting of sweet sorghum bagasse |
Autor: | Bernal Calderón, M. Pilar CSIC ORCID ; Navarro, Antonio F.; Roig, Asunción CSIC ; Cegarra Rosique, Juan CSIC; García, Diego | Fecha de publicación: | 1996 | Editor: | Springer Nature | Citación: | Biology and Fertility of Soils 22: 141-148 (1996) | Resumen: | Two types of compost, consisting of sweet sorghum bagasse with either sewage sludge or a mixture of pig slurry and poultry manure, were studied in a pilot plant using the Rutgers system. The total degradation of the piles as determined by the weight loss of organic matter during the bio-oxidative and maturation phases accounted for 64% of the organic matter applied and followed a first-order kinetic function. Concentrations of total and organic N increased during the composting process as the degradation of organic C compounds reduced the compost weight. Losses of N through NH3 volatilization were low, particularly in the compost with sewage sludge due to pH values of <7.0 and the low temperatures reached in the compost during the first 2 weeks. The C:N ratio in the two composts decreased from 24.0 and 15.4 to values between 12 and 10. Increases in cation exchange capacity and in fulvic and humic acid-like C revealed that the organic matter had been humified during composting. The humification index, the C:N ratio, fulvic:humic acid-like C, and cation exchange capacity proved to be the most suitable parameters for assessing the maturity of these composts. | Versión del editor: | https://doi.org/10.1007/BF00384446 | URI: | http://hdl.handle.net/10261/273061 | DOI: | 10.1007/BF00384446 | ISSN: | 0178-2762 |
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