Báo cáo lâm nghiệp:"Interaction of initial seedling diameter, fertilization and weed control on Douglas-fir growth over the first four years after planting" ppsx
... article
Interaction of initial seedling diameter, fertilization
and weed control on Douglas-fir growth over the first four years
after planting
Robin ROSE*, J. Scott KETCHUM
Vegetation Management ... positive
responses to fertilization in the presence of weed control.
Their results closely mirrored those of White and Newton
[44], with a negativ...
... model plantation
in the Krkonoše Mts. agree with the finding that the
slow growth of a part of the population of spruce
seedlings is the most marked in the first years after
sowing and later it ...
population of Norway spruce after their planting in
extreme mountain conditions compared to the develop-
ment of seedlings of standard and large dimensions...
...
the
growth
of
the
rooting
system
of
this
phreatophytic
species
is
the
first
component
of
the
success
of
its
estab-
lishment.
During
the
juvenile
stage,
the
water
economy, ...
oper-
ated
on
provenances
and
on
isolated
geno-
types.
Ranking
for
W was
consistent
with
initial
growth,
and
our
results
matched
the
second
condition
listed...
... at 10 and 15 years of
age. As the mean diameter and height at 10 years of age, was within
the range of the trees sampled to derive the volume equations, ap-
plication of the equations to the earlier ... comparison of the four
taxa that have been most widely planted in southeast Queens-
land during the past 20 years; allowing investigation of differ-
ences...
...
heating
effects
of
the
transducer
on
the
sensor
and
the
sample,
we
used
the
sensor
intermittently,
switching
it
on
only
for
2
min
out
of
10.
The
acoustic
emissions
were
counted
using ...
result of
the
creation
of
new
tech-
niques
based
on
the
detection
of
sounds
(Milburn,
1973)
or,
more
reliably,
ultra-
sounds
(Tyree
and
Dixon...
...
integrators.
The
location
of
the
line
sensor
was
randomly
changed
every
week
among
permanent
growth
plots
of
the
4
clones.
Results
Light
interception
of
the
clones
increased
throughout ...
deltoidt
1S
clone
111-5.
The
linear
regression
of
cumulative
biomass
on
cumulative
intercepted
radiation
of
the
4
clones
had
an
R
2
of
0.87,
with...
... to the consumption of seed
reserves. Thus, the kinetic of changes in dry weight and in nitrogen
content of both the cotyledons and the growing plant, was established
prior to the analysis of the ... replications in each experiment, stage of growth and experimental conditions.
Factorial experiment Harvest at
different stages
of growth
Full light Shade
Stage o...
...
and
the
Northern
Research
Station
for
raising
the
container
seedlings,
and
the
staff
rooting
volume
held
constant,
has
a
strong
influence
on
the
growth
and
development
of ...
survival
and
growth
of
these
seedlings
can
be
achieved
after
outplanting
on
suitable
sites
given
adequate
ground
preparation
and
proper
weed
control
and
pro...
...
effects
of
environmental
variables
or
silvicultural
treatments
on
growth
and
allocation
of
dry
matter
by
analysis
of
shoot/root
ratio
(mass
of
top/mass
of
root)
but
use
of
this ...
relationship
was
not
influenced
by
seedling
[N].
On
the
other
hand,
allo-
metric
relations
between
W
and
Wr
were
dependent
upon
seedling
[N],
which
influen...
... AVZ together with fields of the 8
th
and 9
th
AVZ.
Only single habitats of the 7
th
AVZ occur in the
field of the 4
th
and 5
th
AVZ.
From the view of hydricity (q-axis), habitats of
the 7
th
... habitats of the 8
th
AVZ lie along
the x-axis on the left side. is dotted field is not
situated along the x-axis in the same way as the
field of th...