Effects of Forest Harvest on Soil Carbon and Related Variables in Canadian Spodosols

Détails

ID Serval
serval:BIB_6707B2A2816E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Effects of Forest Harvest on Soil Carbon and Related Variables in Canadian Spodosols
Périodique
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
Auteur(s)
Grand Stephanie, Lavkulich Les M.
ISSN-L
0361-5995
Statut éditorial
Publié
Date de publication
09/2012
Volume
76
Numéro
5
Pages
1816-1827
Notes
ISI:000308806300029
Résumé
Knowledge about soil organic carbon (SOC) response to forest harvest in
conifer stands is limited. The objective of this study was to determine
the short-to medium-term effects of bole-only clearcut harvest on SOC
and related variables in a Douglas fir [Pseudotsuga menziesii (Mirbel)
Franco]-dominated forest of southwestern British Columbia. We collected
soil samples from control (mature forest), cleared (harvested 1-5 yr
before sampling), and regenerating (harvested 8-15 yr before sampling)
stands and measured SOC, pH, texture, moisture, total N,
loss-on-ignition, effective cation exchange capacity (CECe), and
pyrophosphate-extractable Fe and Al. We found that SOC stocks in the
forest floor were higher in cleared and regenerating plots than in
control. The mineral subsoil played an important role in the overall
response of SOC storage after harvest. In mineral horizons, SOC
concentration was higher in cleared plots and similar to control levels
in regenerating plots. Treatment effects were restricted to SOC
associated with the sand size fractions. This suggests that clearcutting
resulted in additional soil organic matter (SOM) inputs to the mineral
soil, but that these inputs were not stabilized or retained in
regenerating plots. Harvest also affected bulk organic matter
composition. The C/N and C/SOM ratios were lower in regenerating plots
while the CECe/C ratio was higher, suggesting an increase in organic
matter maturity and oxidation.
Création de la notice
19/04/2016 9:57
Dernière modification de la notice
20/08/2019 14:22
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