Do cover crops enhance N2O, CO2 or CH4 emissions from soil in Mediterranean arable systems?

Sanz Cobeña, Alberto; Garcia Marco, Sonia; Quemada Saenz-Badillos, Miguel; Gabriel Pérez, José Luis; Almendros García, Patricia y Vallejo Garcia, Antonio (2014). Do cover crops enhance N2O, CO2 or CH4 emissions from soil in Mediterranean arable systems?. "Science of the Total Environment", v. 466/46 ; pp. 164-174. ISSN 0048-9697. https://doi.org/10.1016/j.scitotenv.2013.07.023.

Descripción

Título: Do cover crops enhance N2O, CO2 or CH4 emissions from soil in Mediterranean arable systems?
Autor/es:
  • Sanz Cobeña, Alberto
  • Garcia Marco, Sonia
  • Quemada Saenz-Badillos, Miguel
  • Gabriel Pérez, José Luis
  • Almendros García, Patricia
  • Vallejo Garcia, Antonio
Tipo de Documento: Artículo
Título de Revista/Publicación: Science of the Total Environment
Fecha: Enero 2014
Volumen: 466/46
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Química y Tecnología de Alimentos
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

This study evaluates the effect of planting three cover crops (CCs) (barley, Hordeum vulgare L.; vetch, Vicia villosa L.; rape, Brassica napus L.) on the direct emission of N2O, CO2 and CH4 in the intercrop period and the impact of incorporating these CCs on the emission of greenhouse gas (GHG) from the forthcoming irrigated maize (Zea mays L.) crop. Vetch and barley were the CCs with the highest N2O and CO2 losses (75 and 47% increase compared with the control, respectively) in the fallow period. In all cases, fluxes of N2O were increased through N fertilization and the incorporation of barley and rape residues (40 and 17% increase, respectively). The combination of a high C:N ratio with the addition of an external source of mineral N increased the fluxes of N2O compared with − Ba and − Rp. The direct emissions of N2O were lower than expected for a fertilized crop (0.10% emission factor, EF) compared with other studies and the IPCC EF. These results are believed to be associated with a decreased NO3− pool due to highly denitrifying conditions and increased drainage. The fluxes of CO2 were in the range of other fertilized crops (i.e., 1118.71–1736.52 kg CO2–C ha− 1). The incorporation of CC residues enhanced soil respiration in the range of 21–28% for barley and rape although no significant differences between treatments were detected. Negative CH4 fluxes were measured and displayed an overall sink effect for all incorporated CC (mean values of − 0.12 and − 0.10 kg CH4–C ha− 1 for plots with and without incorporated CCs, respectively).

Más información

ID de Registro: 35607
Identificador DC: http://oa.upm.es/35607/
Identificador OAI: oai:oa.upm.es:35607
Identificador DOI: 10.1016/j.scitotenv.2013.07.023
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0048969713007912
Depositado por: Memoria Investigacion
Depositado el: 24 Jun 2015 15:43
Ultima Modificación: 31 Ene 2016 23:56
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