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9 December 2016 Greenhouse gas dynamics in a tree-based intercropping system compared with an organic conventional system1
Mario A. Cuéllar, Suzanne E. Allaire, Sébastien F. Lange, Robert L. Bradley, William F.J. Parsons, David Rivest, Alain Cogliastro
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Abstract

Tree-based intercropping (TBI) system has been suggested as an alternative to conventional monocropping (CM) for decreasing overall greenhouse gas (GHG) emissions. However, little is known about the advantages of TBI compared with organic CM system with low fertilizer inputs. This project compared CO2 and N2O dynamics in replicated TBI and CM in Saint-Paulin (QC, Canada), established about 12 yr prior to this study under organic production, with horse manure and pruning residues as soil amendments. An experimental field, using a complete randomized block design, was instrumented in both systems. A five-point sampling transect was established between tree rows in each of the six plots. Surface CO2 and N2O fluxes, CO2 and N2O soil concentrations, and other physicochemical properties were analyzed at 0.125 and 0.25 m depths over two growing seasons. CO2 and N2O concentrations in TBI soil were similar to or lower than in CM soil. Lower CO2 and N2O emissions suggest that TBI would decrease overall GHG mitigation, even when compared with organic production with low fertilizer inputs, in addition to its potential for carbon sequestration in wood and other advantages that are not discussed in this study.

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Mario A. Cuéllar, Suzanne E. Allaire, Sébastien F. Lange, Robert L. Bradley, William F.J. Parsons, David Rivest, and Alain Cogliastro "Greenhouse gas dynamics in a tree-based intercropping system compared with an organic conventional system1," Canadian Journal of Soil Science 97(3), 382-393, (9 December 2016). https://doi.org/10.1139/cjss-2016-0081
Received: 14 July 2016; Accepted: 1 December 2016; Published: 9 December 2016
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KEYWORDS
agroforesterie
Agroforestry
arbres
carbon dioxide
dioxyde de carbone
emission fluxes
émissions de gaz
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