Báo cáo lâm nghiệp:" Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions in Pinus sylvestris" potx
...
were
obtained
for
top
shoot
growth
of
clones
1011
and
1019,
the
latter
showing
lower
final
lengths
(A
=
112-136
mm),
lower
b-values
(b
=
4.8-5.7)
and
inflexion
points
on ...
(UIA),
Universiteitsplein
1,
B-26 10
Wifrijk-Antwerpen,
Belgium
Introduction
The
novel
forest
decline
observed
in
Eu-
rope
and
the U.S.A.
may
be
caused
by
several
factors,...
... improve the relation that allowed
calculating cutting forces involved during machining, and to
take into account, more precisely, the influence of wood mate-
rial in this relationship.
3.1. Relationship ... forces
during wood machining, a factor remains difficult to take into
consideration: the influence of wood species. Therefore, the
aim of this study is to understand the influ...
... physiological processes is
described in rooted cuttings compared to seedlings,
e.g. later onset and lower intensity of dormancy
and cold hardiness and earlier flushing in spring
(F et al. 2000). ...
samples were put into a cooling box in the field and
subsequently transported to a laboratory for evalua-
tion. In the laboratory the branch bases were put into
wate...
... classified into different stratums according to altitude.
The recognition of these problems in such wide areas, and
the increasing interest in using these stands for either direct
production (such as wine ... ecologi-
cal conditions (stratums and testing data) makes this site index
model a good option for classifying site qualities of Q. pyre-
naica stands.
Figure 7. Site inde...
... differences in the growth chamber RGP, with a peak in
December (between 7 to 12 new roots longer than one cm)
and very low values in November and January for seedlings
maintained in mild and cold ... evaluated in needles and starch and soluble sugars in the whole shoot. N = 25 seedlings in a composite sample.
542 A.D. del Campo et al.
stock possible. To this end,...
... of
standardized ring width and periodic annual increment in volume,
respectively, in order to eliminate the effect of tree ageing and initial
tree size on growth loss estimations. Since we tried to ... sum-
marized in Table I.
2.2. Sampling procedure
The selected PSPs were located and inventoried again during the
snow-free periods between 1998 and 2002. The inventory consi...
...
are
deeply
indebted
to
J.M.
Guehl
for
having
introduced
them
into
the
world
of carbon
isotope
discrimination
and
for
helpful
discussions
and
suggestions
during
the
whole ...
negative
correlation
between
W and
LMR
in
Quercus
petraea
and
Pinus
pinaster,
and
Virgona
et
al.
[33]
reported
a
similar
result
in
sunflower.
LMR
could
thus
be
an
int...
...
6703
8W
Wageningen,
The
Netherlands
Introduction
The
growth
of
leaves
and
internodes
on a
branch
of
poplar,
grown
under
constant
conditions,
proceeds
according
to
growth
patterns, ...
development
of
individual
leaves
and
internodes
in
the
linear
phase
of
of
nitrate
could
not
sustain
a
high
RGR
50
in
growing
leaves.
Dry
matter-
(Fig.
1)
and...
... stand Forest site
1 169b pure stand of 111-year-old spruce mixed mountain forest site
2 169b 4-year-old beech stand in a thinned 111-year-old stand mixed mountain forest site
3 169g pure stand ... mountain forest site
4 169b cluster of 8-year-old fir under a 112-year-old spruce stand mixed mountain forest site
5 280d stand of 10-year-old beech mountain forest site
6 179k
thinned...