Soil CO2 effluxes, soil carbon balance, and early tree growth following savannah afforestation in Congo: Comparison of two site preparation treatments

Nouvellon, Yann; Epron, Daniel; Kinana, Antoine; Hamel, Olivier; Mabiala, André; d’Annunzio, Rémi; Deleporte, Philippe; Saint‐André, Laurent; Marsden, Claire; Roupsard, Olivier; Bouillet, Jean‐Pierre; Laclau, Jean‐Paul

doi:10.1016/j.foreco.2007.12.026

Cited by 39 publications

(22 citation statements)

References 72 publications

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“…The Kyoto Protocol and IPCC Report (2007) suggested that afforestation is a potentially useful approach to mitigate the increasing atmospheric CO 2 concentration (Berthrong et al, 2012), and the area of forest plantations is rapidly increasing throughout the world (Nouvellon et al, 2008). In China, forestation has been carried out as an effective measure against environment degradation since the 1970s and has brought a remarkable increase in the forest C stock of 0.45 Pg (Fang et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effects of site preparation treatments before afforestation on soil carbon release

Wang

et al. 2016

Forest Ecology and Management

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a b s t r a c tSite preparation, as an important procedure before afforestation, can affect soil C release. However, the effect of site preparation on soil C release has not been sufficiently investigated. Two site clearing treatments (brush clearing and controlled burning) followed by three soil preparation treatments (overall soil preparation, spot soil preparation, and no soil preparation (control)) were carried out in subtropical China. Soil basal respiration (R S ) and C release of biomass burning were measured as soil C release on an area basis from March 2011 to March 2013. The site preparations changed the soil C release in the first year but had no effects in the second year. Compared with brush clearing (control), controlled burning (control) significantly increased the annual soil C release (decreased R S but increased C release of biomass burning) during the first year. Within the brush clearing plots, overall soil preparation significantly increased the R S rate over eight months and resulted in an increase in annual soil C release during the first year compared to the no soil preparation. In contrast, spot soil preparation increased the R S rate only for three months and did not affect the annual soil C release during the first year relative to the no soil preparation. In the controlled burning plots, both overall and spot soil preparation increased the R S rate across six months, but only overall soil preparation caused a significant increase in the annual soil C release. Our study suggests that minimizing the disturbance of the site preparation would decrease soil C release. Concluding, the spot soil preparation followed brush clearing is a good choice for site preparation in term of soil C storage.

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Section: Introductionmentioning

confidence: 99%

Effects of site preparation treatments before afforestation on soil carbon release

Wang

et al. 2016

Forest Ecology and Management

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“…However the potential for carbon sequestration in the soil in these Eucalyptus plantations on savannah is thought to be limited because soil under native savannah is less carbon depleted than cropland soils and because sandy soils do not contain large amounts of carbon relative to finer textured soils (Six et al 2002;Stewart et al 2007Stewart et al , 2008. In any case, the change in soil carbon after afforestation is commonly more pronounced in coarser particle-size fractions (Feller and Beare 1997;Li et al 2005;d'Annunzio et al 2008), which means that recently incorporated soil C is less stabilized than carbon remaining from the native ecosystem (Paul et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Soil carbon dynamics following afforestation of a tropical savannah with Eucalyptus in Congo

et al. 2009

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“…When scaled to a virtual Eucalyptus stand, root respiration increased from 0.39 to 3.14 g C m −2 d −1 respectively at 6 and 126 months. This range is consistently lower than soil respiration that includes both heterotrophic and autotrophic component: 1.79 g C m −2 d −1 from 0 to 12 months (Nouvellon et al 2008), 3.45 g C m −2 d −1 at 36 months (Epron et al 2004) and 4.30 g C m −2 d −1 at 108 months (Epron et al 2006). This approach might therefore enable partitioning of soil CO 2 efflux among heterotrophic and root component in further sudies.…”

Section: Up Scaling Root Respiration To Stand Levelmentioning

confidence: 85%

“…Simulated fine root respiration at 12 months (with root turnover of 2 yr −1 ) was 0.77 g C m −2 d −1 while estimated root respiration from carbon budget after afforestation with the clone 1-41 was 0.54 g C m −2 d −1 (Nouvellon et al 2008). Simulated fine root respiration at 108 months was 3.02 g C m −2 d −1 , more than those derived for the same clone from soil carbon budget after clear cutting (2.52 gC m −2 d −1 , Epron et al 2006).…”

Section: Up Scaling Root Respiration To Stand Levelmentioning

confidence: 99%

Growth and maintenance respiration of roots of clonal Eucalyptus cuttings: scaling to stand-level

et al. 2010

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Root respiration consumes an important part of the daily assimilated carbon but the magnitude of this component of forest net ecosystem exchange and its partitioning among the different energy demanding processes in roots are still poorly documented. 5-month old Eucalyptus cuttings were grown in a greenhouse in pot filled with coarse sand. They were fertilized with three different amounts of a slowrelease fertilizer with the doses of 8, 24 and 48 g of nitrogen per plant. Root respiration was measured using an infrared gas analyser by perfusing air through the pot on 9 plants per treatment on three dates 14 days apart. Measure of root respiration of the three treatments over time was made in order to obtain a large range of growth and nutrient uptake. Root respiration normalized at 22°C ranged from 0.09 to 0.23 g C d −1 for the three treatments during all the experiment. It was well predicted with a model that includes root growth rate and root nitrogen content. The nitrogen related maintenance coefficient was negatively correlated to the root nitrogen concentration suggesting a decrease in protein turnover with increasing fertility. Growth rate of fine root in a virtual stand was simulated using age-related allometric equations and further used to estimate root respiration in the field. Simulated root respiration Plant Soil (2010) 332:41-53 increased over time from 0.39 to 3.14 g C m −2 d −1 between 6 and 126 months assuming a turnover of 2 yr −1 for fine roots. The major fraction of simulated root respiration in the field (78-92%) was used for the maintenance of the existing biomass.

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Soil CO2 effluxes, soil carbon balance, and early tree growth following savannah afforestation in Congo: Comparison of two site preparation treatments

Cited by 39 publications

References 72 publications

Effects of site preparation treatments before afforestation on soil carbon release

Effects of site preparation treatments before afforestation on soil carbon release

Soil carbon dynamics following afforestation of a tropical savannah with Eucalyptus in Congo

Growth and maintenance respiration of roots of clonal Eucalyptus cuttings: scaling to stand-level

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