Ranking factors affecting emissions of GHG from incubated agricultural soils

Garcia Marco, Sonia and Ravella,, S. R. and Chadwick,, P. and Vallejo Garcia, Antonio and Gregory, A.S. and Cárdenas,, L.M. (2014). Ranking factors affecting emissions of GHG from incubated agricultural soils. "European Journal of Soil Science", v. 65 ; pp. 573-586. ISSN 1351-0754. https://doi.org/10.1111/ejss.12143.

Description

Title: Ranking factors affecting emissions of GHG from incubated agricultural soils
Author/s:
  • Garcia Marco, Sonia
  • Ravella,, S. R.
  • Chadwick,, P.
  • Vallejo Garcia, Antonio
  • Gregory, A.S.
  • Cárdenas,, L.M.
Item Type: Article
Título de Revista/Publicación: European Journal of Soil Science
Date: 2014
ISSN: 1351-0754
Volume: 65
Subjects:
Faculty: E.U.I.T. Agrícolas (UPM)
Department: Química y Tecnología de Alimentos
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Agriculture significantly contributes to global greenhouse gas (GHG) missions and there is a need to develop effective mitigation strategies. The efficacy of methods to reduce GHG fluxes from agricultural soils can be affected by a range of interacting management and environmental factors. Uniquely, we used the Taguchi experimental design methodology to rank the relative importance of six factors known to affect the emission of GHG from soil: nitrate (NO3?) addition, carbon quality (labile and non-labile C), soil temperature, water-filled pore space (WFPS) and extent of soil compaction. Grassland soil was incubated in jars where selected factors, considered at two or three amounts within the experimental range, were combined in an orthogonal array to determine the importance and interactions between factors with a L16 design, comprising 16 experimental units. Within this L16 design, 216 combinations of the full factorial experimental design were represented. Headspace nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2) concentrations were measured and used to calculate fluxes. Results found for the relative influence of factors (WFPS and NO3? addition were the main factors affecting N2O fluxes, whilst glucose, NO3? and soil temperature were the main factors affecting CO2 and CH4 fluxes) were consistent with those already well documented. Interactions between factors were also studied and results showed that factors with Little individual influence became more influential in combination. The proposed methodology offers new possibilities for GHG researchers to study interactions between influential factors and address the optimized sets of conditions to reduce GHG emissions in agro-ecosystems, while reducing the number of experimental units required compared with conventional experimental procedures that adjust one variable at a time.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2009‐08412‐AGRUnspecifiedUnspecifiedUnspecified

More information

Item ID: 35151
DC Identifier: http://oa.upm.es/35151/
OAI Identifier: oai:oa.upm.es:35151
DOI: 10.1111/ejss.12143
Official URL: https://onlinelibrary.wiley.com/doi/full/10.1111/ejss.12143
Deposited by: Memoria Investigacion
Deposited on: 21 May 2015 09:27
Last Modified: 06 May 2019 11:06
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