An estimation of hybrid poplar clones productivity in
northwestern QuebecAbhishek M. Tripathi1*, Andréanne Desormeaux2 Annie DesRochers1
1Institut de Recherche sur les forêts, Université du Québec en Abitibi-Témiscamingue, 341 Rue Principale Nord, Amos, Québec, Canada, J9T 2L7; 2Étudiante au baccalauréat en écologie, Faculté des sciences, Université de Sherbrooke 2500, Sherbrooke,
Quebec, Canada J1K 2R1; *Corresponding author email: [email protected]/[email protected]
Introduction
Fast growing trees cultivations are often managed in two
ways (i) high forest (rotation length 20-25 years) or (ii)
short rotation coppice (SRC; 2-8 years rotation),
plantations, depending on the utilization of woods.
Because of multiuse and high demand of poplars
worldwide, there is a need to test growth and productivity
of clones under intensive silviculture management and
under boreal climatic conditions. We hypothesized that
tree spacing and site quality can affect aboveground
biomass production of poplar clones.
Materials and Methods
Aims of the study
• To develop a model to estimate the aboveground
biomass of hybrid poplar clones
• To estimate the impact of clones and spacing on
aboveground biomass mass production in high forest
plantations
Table 1 : Climatic conditions of research sites and design of hybrid
poplar plantations
Results
Note: 747215 (P. trichocarpa Torrey & A.Gray × P. balsamifera L.); 915004 and 915005 (P. balsamifera × P. maximowiczii Henry) and 915319
(P. maximowiczii × P. balsamifera).
0
20
40
60
80
100
120
140
1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4 1X4 2X4 3X4
747215 915004 915005 915319 747215 915004 915005 915319 747215 915004 915005 915319
Villebois Duparquet Duhamel
To
tal a
bo
ve
gro
un
db
iom
ass
tha
-1T
ota
l b
iom
ass t
on
ha
-1
To
tal b
iom
ass t
on
ha
-1
9150
05
7472
15
9150
04
9153
19
Site
Villebo
is
Dup
arqu
et
Duh
amel
To
tal b
iom
ass t
on
ha
-1
0
10
20
30
40
50
60
Spacing
1X4 2X4 3X4
0
10
20
30
40
50
60
Clones
0
20
40
60
80
Conclusions
• Maximum aboveground biomass maybe be produced in high density forest
plantations.
• Farmlands could significantly contribute in high aboveground biomass
production.
• The clone 915319 could be high productive clone in our climatic conditions.
• Total/annual aboveground biomass may depend on sites and clones.
• For better and precise results there is a need to continue research with many
clones and sites in different silviculture practice management.
AcknowledgementsWe acknowledge the Groupement Forestier Cooperatif
Abitibi and NSERC, Canada for providing us financial
support to carried out hybrid poplars research in Canada.
Figure 2: Dynamics of total aboveground biomass of hybrid poplar clones after 12 years of growth in a high forest at different sites under different
spacing in northwestern Quebec, Canada
D2
.H
0 2000 4000 6000 8000
To
tal a
bo
ve
gro
un
d b
iom
ass (
t h
a-1
)
0
20
40
60
80
100
120
140
160
Clone 747215
Clone 747215
CLone 915004
CLone 915004
CLone 915005
CLone 915005
CLone 915319
CLone 915319
Clone Equation (f=a*x^b)R2
747215 0.0445*x 0̂.8697 0.98
915004 3.5539*x 0̂.2746 0.42
915005 0.0911*x 0̂.7555 0.65
915319 0.0383*x 0̂.9087 0.95
Figure 1: An allometric relation between total aboveground biomass
and diameter at breast height (D) and tree height (H)
Figure 3: Impact of sites, hybrid poplar
clones and spacing on total aboveground
biomass after 12 years of growth
Total aboveground biomass after 12- years of
hybrid poplar tree growth in different clones
Clone Biomass (t tree-1)
747215 21.16
915004 30.21
915005 31.03
915319 40.99
Hybrid poplars in a high forest in northwestern Quebec, Canada