Agritrop
Home

The manipulation of organic residues affects tree growth and heterotrophic CO2 efflux inatropical Eucalyptus plantation

Versini Antoine, Nouvellon Yann, Laclau Jean-Paul, Kinana Antoine, Mareschal Louis, Zeller Bernd, Ranger Jacques, Epron Daniel. 2013. The manipulation of organic residues affects tree growth and heterotrophic CO2 efflux inatropical Eucalyptus plantation. Forest Ecology and Management, 301 : pp. 79-88.

Journal article ; Article de revue à facteur d'impact
[img] Published version - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.
document_569061.pdf

Télécharger (539kB)

Quartile : Q1, Sujet : FORESTRY

Abstract : Fast-growing plantationsareincreasinglybeingestablishedontropicalsoils,wherefertilityislargely supported bysoilorganicmatter(SOM)andwheredifferentmanagementoptionsofharvestorganicres- idues isthoughttoimpactthelong-termsustainabilityoftheseplantations.Theobjectivesofthisstudy were: (1)toquantifytheeffectofcontrastingmethodsoforganicresiduemanagementontreegrowth and soilCO2 effluxes inthefirst2yearsafterplantingand(2)toevaluatetheimpactoforganicresidue manipulations onthemineralizationofsoilorganicmatteroverthelengthoftheexperiment.Threetreat- ments weresetupin0.125haplotsandreplicatedinthreeblocksattheharvestingofaCongolese Euca-lyptus stand, resultinginanabovegroundorganicresiduemassrangingfrom0to6.3kgm_2. The mineralization ofSOMwasdeducedineachtreatmentbypartitioningsourcesofsoilCO2 effluxes using decomposition experimentsandbyupscalingspecificrootrespiration.SoilCO2 effluxes weregreatly affected byseasonsandorganicresiduemanipulation,althoughtherewerenosignificantchangesintop- soil watercontentandtopsoiltemperatureovermostofthestudyperiod.Abovegroundorganicresidue was thefirstcontributortosoilCO2 efflux inthetwotreatmentswithalitterlayer.Organicresidueman- agement didnotsignificantlyinfluencethemineralizationofSOMinourstudy,probablyduetothelow quality of Eucalyptus litter, ortothehypotheticallackofdissolvedorganiccarbontransfersfromlitterto soil. AstrongrelationshipwasfoundbetweencumulativeheterotrophicCO2 efflux andtreegrowth,sup- porting thehypothesisthattheearlygrowthof Eucalyptus trees inasandytropicalsoilislargelydepen- dent onthenutrientsreleasedbythedecompositionoforganicresidues. (Résumé d'auteur)

Mots-clés Agrovoc : Eucalyptus, Résidu de récolte, Croissance, Respiration du sol, Minéralisation, Matière organique du sol

Mots-clés géographiques Agrovoc : Congo

Classification Agris : K10 - Forestry production
F62 - Plant physiology - Growth and development
P33 - Soil chemistry and physics

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Versini Antoine, INRA (FRA) ORCID: 0000-0002-5119-0567
  • Nouvellon Yann, CIRAD-PERSYST-UMR Eco&Sols (BRA)
  • Laclau Jean-Paul, CIRAD-PERSYST-UMR Eco&Sols (BRA) ORCID: 0000-0002-2506-214X
  • Kinana Antoine, CRDPI (COG)
  • Mareschal Louis, CIRAD-PERSYST-UMR Eco&Sols (COG)
  • Zeller Bernd, INRA (FRA)
  • Ranger Jacques, INRA (FRA)
  • Epron Daniel, CIRAD-PERSYST-UMR Eco&Sols (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/569061/)

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2020-10-14 ]