Carbon dioxide emissions from semi-arid soils amended with biochar alone or combined with mineral and organic fertilizers

Fernández, José M.; Nieto, María Aurora; López de Sá, Esther G.; Gascó, Gabriel; Méndez, Ana y Plaza, César (2014). Carbon dioxide emissions from semi-arid soils amended with biochar alone or combined with mineral and organic fertilizers. "Science of The Total Environment" (n. 482); pp. 1-7. ISSN 0048-9697. https://doi.org/10.1016/j.scitotenv.2014.02.103.

Descripción

Título: Carbon dioxide emissions from semi-arid soils amended with biochar alone or combined with mineral and organic fertilizers
Autor/es:
  • Fernández, José M.
  • Nieto, María Aurora
  • López de Sá, Esther G.
  • Gascó, Gabriel
  • Méndez, Ana
  • Plaza, César
Tipo de Documento: Artículo
Título de Revista/Publicación: Science of The Total Environment
Fecha: Febrero 2014
Materias:
Escuela: E.T.S.I. Minas (UPM) [antigua denominación]
Departamento: Ingeniería de Materiales [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Semi-arid soils cover a significant area of Earth s land surface and typically contain large amounts of inorganic C. Determining the effects of biochar additions on CO2 emissions fromsemi-arid soils is therefore essential for evaluating the potential of biochar as a climate change mitigation strategy. Here, we measured the CO2 that evolved from semi-arid calcareous soils amended with biochar at rates of 0 and 20 t ha?1 in a full factorial combination with three different fertilizers (mineral fertilizer, municipal solid waste compost, and sewage sludge) applied at four rates (equivalent to 0, 75, 150, and 225 kg potentially available N ha?1) during 182 days of aerobic incubation. A double exponential model, which describes cumulative CO2 emissions from two active soil C compartments with different turnover rates (one relatively stable and the other more labile), was found to fit verywell all the experimental datasets. In general, the organic fertilizers increased the size and decomposition rate of the stable and labile soil C pools. In contrast, biochar addition had no effects on any of the double exponential model parameters and did not interact with the effects ascribed to the type and rate of fertilizer. After 182 days of incubation, soil organic and microbial biomass C contents tended to increase with increasing the application rates of organic fertilizer, especially of compost, whereas increasing the rate of mineral fertilizer tended to suppress microbial biomass. Biochar was found to increase both organic and inorganic C contents in soil and not to interactwith the effects of type and rate of fertilizer on C fractions. As a whole, our results suggest that the use of biochar as enhancer of semi-arid soils, either alone or combined with mineral and organic fertilizers, is unlikely to increase abiotic and biotic soil CO2 emissions.

Más información

ID de Registro: 34041
Identificador DC: http://oa.upm.es/34041/
Identificador OAI: oai:oa.upm.es:34041
Identificador DOI: 10.1016/j.scitotenv.2014.02.103
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0048969714002861
Depositado por: Memoria Investigacion
Depositado el: 25 Feb 2015 08:44
Ultima Modificación: 25 Feb 2015 08:44
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