Biogeochemistry

, 89:329

Fluxes of greenhouse gases from Andosols under coffee in monoculture or shaded by Inga densiflora in Costa Rica

  • Kristell Hergoualc’h
  • Ute Skiba
  • Jean-Michel Harmand
  • Catherine Hénault
Original Paper

DOI: 10.1007/s10533-008-9222-7

Cite this article as:
Hergoualc’h, K., Skiba, U., Harmand, JM. et al. Biogeochemistry (2008) 89: 329. doi:10.1007/s10533-008-9222-7

Abstract

The objective of this study was to evaluate the effect of N fertilization and the presence of N2 fixing leguminous trees on soil fluxes of greenhouse gases. For a one year period, we measured soil fluxes of nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4), related soil parameters (temperature, water-filled pore space, mineral nitrogen content, N mineralization potential) and litterfall in two highly fertilized (250 kg N ha−1 year−1) coffee cultivation: a monoculture (CM) and a culture shaded by the N2 fixing legume species Inga densiflora (CIn). Nitrogen fertilizer addition significantly influenced N2O emissions with 84% of the annual N2O emitted during the post fertilization periods, and temporarily increased soil respiration and decreased CH4 uptakes. The higher annual N2O emissions from the shaded plantation (5.8 ± 0.3 kg N ha−1 year−1) when compared to that from the monoculture (4.3 ± 0.1 kg N ha−1 year−1) was related to the higher N input through litterfall (246 ± 16 kg N ha−1 year−1) and higher potential soil N mineralization rate (3.7 ± 0.2 mg N kg−1 d.w. d−1) in the shaded cultivation when compared to the monoculture (153 ± 6.8 kg N ha−1 year−1 and 2.2 ± 0.2 mg N kg−1 d.w. d−1). This confirms that the presence of N2 fixing shade trees can increase N2O emissions. Annual CO2 and CH4 fluxes of both systems were similar (8.4 ± 2.6 and 7.5 ± 2.3 t C-CO2 ha−1 year−1, −1.1 ± 1.5 and 3.3 ± 1.1 kg C-CH4 ha−1 year−1, respectively in the CIn and CM plantations) but, unexpectedly increased during the dry season.

Keywords

Agroforestry CH4 CO2 Mineralization N2Water-filled pore space (WFPS) 

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Kristell Hergoualc’h
    • 1
    • 2
    • 3
  • Ute Skiba
    • 4
  • Jean-Michel Harmand
    • 1
  • Catherine Hénault
    • 5
  1. 1.Centre de coopération International en Recherche Agronomique pour le Développement (CIRAD). UR Ecosystèmes de Plantations, s/c UR SeqBio-IRD (SupAgro)Montpellier Cedex 01France
  2. 2.Departamento de Agricultura y AgroforesteriaCentro Agronómico Tropical de Investigación y Enseñanza (CATIE)TurrialbaCosta Rica
  3. 3.CIFOR ENVBogorIndonesia
  4. 4.Center of Ecology and Hydrology (CEH)PenicuikScotland, UK
  5. 5.Institut National de Recherche en Agronomie (INRA), UMR Microbiologie et Géochimie des SolsDijon CedexFrance

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