The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01]
Agroforestry is a land use type where crops and trees are grown together in the same place and at the same time. Agroforestry systems have the advantage of providing multiple products (e.g. wood, fruits) or services (e.g. biodiversity enhancement, erosion control) whilst maintaining agricultural production. If they are known to store carbon into the biomass of the trees, they could also increase soil organic carbon (SOC) stocks. However their impact has rarely been studied under temperate or Mediterranean conditions and has mostly concerned superficial soil layers. Our objectives were (i) to quantify and spatialize SOC stocks in an agroforestry system and in an adjacent agricultural plot, (ii) to assess what SOC fractions are responsible for possible additional carbon storage, and (iii) to quantify all organic inputs entering the soil. The trial was established in 1995 in southern France. Hybrid walnut trees are intercropped with durum wheat. SOC stocks were measured on 200 soil cores down to 2 m soil depth, and particle-size fractionation was performed on 64 soil samples. Carbon stocks of trees and of the herbaceous vegetation in the tree rows were also quantified. A trench was dug to 4 m soil depth to quantify tree fine root distribution and biomass. Minirhizotrons were installed at different depths to study tree fine root turnover. Annual additional SOC storage rates were estimated at 259 ± 59 kg C ha-1 yr-1 (0-30 cm) and at 350 ± 88 kg C ha-1 yr-1 (0-100 cm). Additional storage was mainly due to particulate organic matter fractions (> 50 μm) and 10 to 15% was associated to clay particles. When the aboveground biomass of the trees was taken into account, total organic carbon storage rate reached 1.11 ± 0.16 Mg C ha-1 yr-1. High tree root densities were observed at depth, but root turnover decreased with depth. Agroforestry systems provide higher amounts of carbon at depth than other agricultural practices, such as no-till farming, and could therefore provide a more stable C storage in the long-term.
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dig-cirad-fr-5770402023-02-09T17:03:44Z http://agritrop.cirad.fr/577040/ http://agritrop.cirad.fr/577040/ The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01]. Chenu Claire, Cardinael Rémi, Chevallier Tiphaine, Germon Amandine, Jourdan Christophe, Dupraz Christian, Barthès Bernard, Bernoux Martial. 2015. In : Our Common Future under Climate Change. International scientific conference Abstract Book 7-10 July 2015. Paris, France. CFCC15. Paris : CFCC15, Résumé, 289. Our Common Future under Climate Change, Paris, France, 7 Juillet 2015/10 Juillet 2015.http://pool7.kermeet.com/C/ewe/ewex/unesco/DOCS/CFCC_abstractBook.pdf <http://pool7.kermeet.com/C/ewe/ewex/unesco/DOCS/CFCC_abstractBook.pdf> Researchers The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01] Chenu, Claire Cardinael, Rémi Chevallier, Tiphaine Germon, Amandine Jourdan, Christophe Dupraz, Christian Barthès, Bernard Bernoux, Martial eng 2015 CFCC15 Our Common Future under Climate Change. International scientific conference Abstract Book 7-10 July 2015. Paris, France F08 - Systèmes et modes de culture K10 - Production forestière P40 - Météorologie et climatologie Agroforestry is a land use type where crops and trees are grown together in the same place and at the same time. Agroforestry systems have the advantage of providing multiple products (e.g. wood, fruits) or services (e.g. biodiversity enhancement, erosion control) whilst maintaining agricultural production. If they are known to store carbon into the biomass of the trees, they could also increase soil organic carbon (SOC) stocks. However their impact has rarely been studied under temperate or Mediterranean conditions and has mostly concerned superficial soil layers. Our objectives were (i) to quantify and spatialize SOC stocks in an agroforestry system and in an adjacent agricultural plot, (ii) to assess what SOC fractions are responsible for possible additional carbon storage, and (iii) to quantify all organic inputs entering the soil. The trial was established in 1995 in southern France. Hybrid walnut trees are intercropped with durum wheat. SOC stocks were measured on 200 soil cores down to 2 m soil depth, and particle-size fractionation was performed on 64 soil samples. Carbon stocks of trees and of the herbaceous vegetation in the tree rows were also quantified. A trench was dug to 4 m soil depth to quantify tree fine root distribution and biomass. Minirhizotrons were installed at different depths to study tree fine root turnover. Annual additional SOC storage rates were estimated at 259 ± 59 kg C ha-1 yr-1 (0-30 cm) and at 350 ± 88 kg C ha-1 yr-1 (0-100 cm). Additional storage was mainly due to particulate organic matter fractions (> 50 μm) and 10 to 15% was associated to clay particles. When the aboveground biomass of the trees was taken into account, total organic carbon storage rate reached 1.11 ± 0.16 Mg C ha-1 yr-1. High tree root densities were observed at depth, but root turnover decreased with depth. Agroforestry systems provide higher amounts of carbon at depth than other agricultural practices, such as no-till farming, and could therefore provide a more stable C storage in the long-term. conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/577040/1/ID577040.pdf text Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html http://pool7.kermeet.com/C/ewe/ewex/unesco/DOCS/CFCC_abstractBook.pdf info:eu-repo/semantics/altIdentifier/purl/http://pool7.kermeet.com/C/ewe/ewex/unesco/DOCS/CFCC_abstractBook.pdf |
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F08 - Systèmes et modes de culture K10 - Production forestière P40 - Météorologie et climatologie F08 - Systèmes et modes de culture K10 - Production forestière P40 - Météorologie et climatologie |
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F08 - Systèmes et modes de culture K10 - Production forestière P40 - Météorologie et climatologie F08 - Systèmes et modes de culture K10 - Production forestière P40 - Météorologie et climatologie Chenu, Claire Cardinael, Rémi Chevallier, Tiphaine Germon, Amandine Jourdan, Christophe Dupraz, Christian Barthès, Bernard Bernoux, Martial The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01] |
description |
Agroforestry is a land use type where crops and trees are grown together in the same place and at the same time. Agroforestry systems have the advantage of providing multiple products (e.g. wood, fruits) or services (e.g. biodiversity enhancement, erosion control) whilst maintaining agricultural production. If they are known to store carbon into the biomass of the trees, they could also increase soil organic carbon (SOC) stocks. However their impact has rarely been studied under temperate or Mediterranean conditions and has mostly concerned superficial soil layers. Our objectives were (i) to quantify and spatialize SOC stocks in an agroforestry system and in an adjacent agricultural plot, (ii) to assess what SOC fractions are responsible for possible additional carbon storage, and (iii) to quantify all organic inputs entering the soil. The trial was established in 1995 in southern France. Hybrid walnut trees are intercropped with durum wheat. SOC stocks were measured on 200 soil cores down to 2 m soil depth, and particle-size fractionation was performed on 64 soil samples. Carbon stocks of trees and of the herbaceous vegetation in the tree rows were also quantified. A trench was dug to 4 m soil depth to quantify tree fine root distribution and biomass. Minirhizotrons were installed at different depths to study tree fine root turnover. Annual additional SOC storage rates were estimated at 259 ± 59 kg C ha-1 yr-1 (0-30 cm) and at 350 ± 88 kg C ha-1 yr-1 (0-100 cm). Additional storage was mainly due to particulate organic matter fractions (> 50 μm) and 10 to 15% was associated to clay particles. When the aboveground biomass of the trees was taken into account, total organic carbon storage rate reached 1.11 ± 0.16 Mg C ha-1 yr-1. High tree root densities were observed at depth, but root turnover decreased with depth. Agroforestry systems provide higher amounts of carbon at depth than other agricultural practices, such as no-till farming, and could therefore provide a more stable C storage in the long-term. |
format |
conference_item |
topic_facet |
F08 - Systèmes et modes de culture K10 - Production forestière P40 - Météorologie et climatologie |
author |
Chenu, Claire Cardinael, Rémi Chevallier, Tiphaine Germon, Amandine Jourdan, Christophe Dupraz, Christian Barthès, Bernard Bernoux, Martial |
author_facet |
Chenu, Claire Cardinael, Rémi Chevallier, Tiphaine Germon, Amandine Jourdan, Christophe Dupraz, Christian Barthès, Bernard Bernoux, Martial |
author_sort |
Chenu, Claire |
title |
The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01] |
title_short |
The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01] |
title_full |
The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01] |
title_fullStr |
The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01] |
title_full_unstemmed |
The contribution of agroforestry systems to climate change mitigation – Assessment of C storage in soils in a Mediterranean context. [P-2218-01] |
title_sort |
contribution of agroforestry systems to climate change mitigation – assessment of c storage in soils in a mediterranean context. [p-2218-01] |
publisher |
CFCC15 |
url |
http://agritrop.cirad.fr/577040/ http://agritrop.cirad.fr/577040/1/ID577040.pdf |
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