Document Server@UHasselt >
Research publications >
Please use this identifier to cite or link to this item:
|Title: ||Net carbon storage in a poplar plantation (POPFACE) after three years of free-air CO2 enrichment|
|Authors: ||GIELEN, Birgit|
de Angelis, P.
Bernacchi, Carl J.
|Issue Date: ||2005|
|Publisher: ||HERON PUBLISHING|
|Citation: ||Tree physiology, 25(11). p. 1399-1408|
|Abstract: ||A high-density plantation of three genotypes of Populus was exposed to an elevated concentration of carbon dioxide ([CO2]; 550 mu mol mol(-1)) from planting through canopy closure using a free-air CO2 enrichment (FACE) technique. The FACE treatment stimulated gross primary productivity by 22 and 11% in the second and third years, respectively. Partitioning of extra carbon (C) among C pools of different turnover rates is of critical interest; thus, we calculated net ecosystem productivity (NEP) to determine whether elevated atmospheric [CO2] will enhance net plantation C storage capacity. Free-air CO2 enrichment increased net primary productivity (NPP) of all genotypes by 21% in the second year and by 26% in the third year, mainly because of an increase in the size of C pools with relatively slow turnover rates (i.e., wood). In all genotypes in the FACE treatment, more new soil C was added to the total soil C pool compared with the control treatment. However, more old soil C loss was observed in the FACE treatment compared with the control treatment, possibly due to a priming effect from newly incorporated root litter. FACE did not significantly increase NEP, probably as a result of this priming effect.|
|ISI #: ||000233212800006|
|Type: ||Journal Contribution|
|Appears in Collections: ||Research publications|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.