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

Sanz Cobeña, Alberto and Garcia Marco, Sonia and Quemada Saenz-Badillos, Miguel and Gabriel Pérez, José Luis and Almendros García, Patricia and 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.

Description

Title: Do cover crops enhance N2O, CO2 or CH4 emissions from soil in Mediterranean arable systems?
Author/s:
  • Sanz Cobeña, Alberto
  • Garcia Marco, Sonia
  • Quemada Saenz-Badillos, Miguel
  • Gabriel Pérez, José Luis
  • Almendros García, Patricia
  • Vallejo Garcia, Antonio
Item Type: Article
Título de Revista/Publicación: Science of the Total Environment
Date: January 2014
ISSN: 0048-9697
Volume: 466/46
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Química y Tecnología de Alimentos
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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).

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2009-08412-AGRUnspecifiedUnspecifiedUnspecified
Madrid Regional GovernmentS2009/AGR-1630UnspecifiedUnspecifiedUnspecified

More information

Item ID: 35607
DC Identifier: http://oa.upm.es/35607/
OAI Identifier: oai:oa.upm.es:35607
DOI: 10.1016/j.scitotenv.2013.07.023
Official URL: http://www.sciencedirect.com/science/article/pii/S0048969713007912
Deposited by: Memoria Investigacion
Deposited on: 24 Jun 2015 15:43
Last Modified: 21 May 2019 10:31
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