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Permanent link (DOI): https://doi.org/10.7939/R34T58

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Afforestation and stand age affected soil respiration and net ecosystem productivity in hybrid poplar plantations in central Alberta, Canada Open Access

Descriptions

Other title
Subject/Keyword
land use change
net ecosystem productivity
soil respiration
hybrid poplar
stand age
climate change
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Shi, Zheng
Supervisor and department
Thomas, Barb (Renewable Resources)
Chang, Scott (Renewable Resources)
Examining committee member and department
Grant, Robert (Renewable Resources)
Chang, Scott (Renewable Resources)
Kershaw, Peter (Earth and Atmosphere Sciences)
Thomas, Barb (Renewable Resources)
Bork, Edward (Agricultural, Food and Nutritional Science)
Department
Department of Renewable Resources
Specialization

Date accepted
2010-09-01T21:10:07Z
Graduation date
2010-11
Degree
Master of Science
Degree level
Master's
Abstract
Afforestation and stand development can significantly affect soil respiration and net ecosystem productivity (NEP). I studied 1) the effects of afforestation on NEP by comparing cropland previously planted to barley (on a barley-barley-alfalfa-alfalfa-alfalfa rotation) and that converted to a hybrid poplar (Populus deltoides × Populus × petrowskyana var. Walker) plantation and 2) the NEP along a chronosequence of stands aged 5-, 8-, 14-, and 16-year old in 2009 in central Alberta, Canada. Soil respiration and NEP decreased in the first two to three years after afforestation, while both generally increased with stand development. The ecosys model was used to simulate carbon dynamics in the plantations over a 20-year rotation under contrasting soil conditions. Soil conditions of the 14-year-old plantation accumulated the greatest amount of ecosystem carbon over the whole rotation. The research indicated that plantations could be a net carbon source in the first few years after afforestation and then became a net carbon sink, helping to mitigate net CO2 emissions for the remainder of the rotation.
Language
English
DOI
doi:10.7939/R34T58
Rights
License granted by zheng shi (zshi1@ualberta.ca) on 2010-08-31T16:48:28Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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