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Quantification of carbon gains and losses for five tree species in a 25-year-old tree-based intercropping system in southern Ontario, Canada

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Title: Quantification of carbon gains and losses for five tree species in a 25-year-old tree-based intercropping system in southern Ontario, Canada
Author: Wotherspoon, Amy
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Gordon, AndrewVoroney, R. Paul
Abstract: This thesis is an investigation of above- and belowground carbon (C) pools and fluxes of five tree species in a 25-year-old tree-based (TBI) system as compared to an adjacent sole-cropped conventional agricultural system at the University of Guelph’s Agroforestry Research Station (43 16’N 89 26’W) (established 1987). This study compared C found in above- and belowground biomass, soil organic carbon, litterfall, litter decomposition and soil respiration. These components were combined in a C model for comparison of C sequestration potential. In intercropping systems planted with hybrid poplar (Populus spp.), red oak (Quercus rubra), black walnut (Juglans nigra), Norway spruce (Picea abies) and white cedar (Thuja occidentalis), net C sequestration was quantified to be approximately 3.4, 3.0, 2.5, 3.7 and 2.7 t C ha-1 year-1. In comparison, the adjacent sole-cropping system, planted with soybean (Glycine max) was found to have a net C sequestration of –1.4 t C ha-1 year-1.
URI: http://hdl.handle.net/10214/7850
Date: 2014-01


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