Summary
Published in Canadian Journal of Forest Research 37: 1118-1133
We assessed the organic C stocks and inferred their changes in vegetation biomass, forest floor, and soil using a 50 year chronosequence of red pine (Pinus resinosa Ait.) plantations established on postagricultural fields in southern Québec, Canada. The data come from soil and tree field surveys carried out in the 1970s in 348 sites. Organic C concentrations were usually measured in three major mineral soil horizons; for the remaining soil horizons, they were estimated using pedotransfer functions. The effect of soil order, drainage, and texture was analysed. Over 22 years, organic C accumulation rates (Mg C.ha-1.year-1) were 1.66 + 0.03 in vegetation biomass, 0.56 + 0.07 in forest floor, 0.86 + 0.47 in loamy soils (0-100 cm), and -0.18 + 0.24 in sandy soils (0-100 cm). The greater rate of C accumulation in loamy soils was due to the contribution of the 30-100 cm subsoil layer. The overall net accumulation of organic C in these plantation ecosystems was estimated to 51.4 + 4.8 Mg C.ha-1 at 22 years. Soils of these plantations acted as a C sink in the first two decades, particularly in loamy soils compared with sandy soils, with no major differences among soil order or drainage.
Sector(s):
Forests
Categorie(s):
Scientific Article
Theme(s):
Ecosystems and Environment, Forest Ecology, Forestry Research, Forests
Departmental author(s):
Author(s)
OUIMET, Rock, Sylvie TREMBLAY, Catherine PÉRIÉ and Guy PRÉGENT
Year of publication :
2007
Format :
Paper
How to get the publication :
Keywords :
carbone, reboisement, pin rouge, Pinus resinosa, ecologie ecosystème et environnement, écosystèmes et environnement, ecosystems and environment, red pine, carbon, reforestation
