The
issue
of
optimising
the
initial
stand
density
(ISD)
tree
plantations
has
high
practical
importance.
objective
this
study
was
to
nondestructively
evaluate
influence
Scots
pine
located
in
European
part
Russian
Federation
on
wood
basic
(BD),
moisture
content
(MC),
ultrasound
velocity
(UV),
latewood
content,
and
drilling
resistance
(DR).
45-year-old
trees
with
densities
500,
1000,
3000,
5000,
10000
trees/ha
were
tested
by
a
5-cm-long
core
sample
for
gravimetric
MCGM
BD,
PULSAR-2.2
UV
along
height
(UVH)
through
trunk
diameter
(UVD),
IML-RESI
PD-400
tool
DR,
GANN
HT
85T
MC
based
electrical
method
(MCERM).
A
significant
ISD
found
DBH,
UVD,
MCGM,
MCERM.
had
no
impact
UVH,
DR.
BD
ranged
from
356
578
kg/m-3,
mean
value
434±3.3
restricted
soil
environmental
factors.
DBH
70%
MCERM
good
indicators
vitality.
Linear
correlations
between
(R2=0.67),
(R2=0.74),
DR
(R2=0.71),
two-factor
model
MCGM=f(DBH,
BD),
(R2=0.76)
found.
Forests,
Год журнала:
2024,
Номер
15(2), С. 233 - 233
Опубликована: Янв. 25, 2024
The
issue
of
optimising
the
initial
stand
density
(ISD)
tree
plantations
has
high
practical
importance.
objective
this
study
was
to
non-destructively
evaluate
influence
Scots
pine
(Pinus
sylvestris
L.)
located
in
European
part
Russian
Federation
on
wood
basic
(BD),
moisture
content
(MC),
ultrasound
velocity
(UV),
latewood
content,
and
drilling
resistance
(DR).
trees
at
age
45
years
with
plantation
densities
500,
1000,
3000,
5000,
10,000
trees/ha
were
tested
by
a
5
cm-long
core
sample
for
gravimetric
MCGM
BD
PULSAR-2.2
UV
along
height
(UVH)
through
trunk
diameter
(UVD)
IML-RESI
PD-400
tool
DR,
as
well
GANN
HT
85T
MC
based
electrical-resistance
method
(MCERM).
A
significant
ISD
found
DBH,
UVD,
MCGM,
MCERM.
had
no
impact
BD,
UVH,
DR.
ranged
from
356
578
kg·m−3
mean
value
434
±
3.3
restricted
soil
environmental
factors.
DBH
70%
MCERM
good
indicators
vitality.
Linear
correlations
between
(R2
=
0.67),
0.74),
DR
0.71),
two-factor
model
f(DBH,
BD)
R2
0.76
found.
Frontiers in Plant Science,
Год журнала:
2024,
Номер
15
Опубликована: Окт. 11, 2024
Eucalyptus
has
become
one
of
the
most
widely
planted
species
in
tropical
and
subtropical
regions
China,
with
important
economic,
ecological,
social
values.
However,
it
is
currently
unclear
how
climate
change
will
affect
different
species.
Therefore,
urgent
to
investigate
potential
distribution
dynamics
under
current
future
scenarios.
In
this
study,
we
analyzed
patterns
three
main
(
grandis
,
urophylla
tereticornis
)
climatic
conditions
(2041-2060
2061-2080)
using
optimized
MaxEnt
model,
which
integrates
a
variety
environmental
data
including
climate,
topography,
soil,
human
influence.
We
also
identified
factors
affecting
distributions
The
model
indicated
that
E.
exhibited
heightened
sensitivity
mean
temperature
coldest
quarter
(7.0-20.0
°C)
annual
(11.9-24.2
°C),
whereas
displayed
precipitation
warmest
(272-1694
mm)
(812-2624
mm).
Conversely,
demonstrated
(12.7-24.5
seasonality
(63.8-598.9).
Under
had
widest
suitable
area
(124.91
×
10
4
km²),
followed
by
(124.89
km²)
(119.81
km²).
scenarios,
ranges
continue
expand.
This
study
highlights
importance
provides
quantified
maps
for
China.
research
offers
valuable
scientific
insights
pertinent
management
rational
site
selection
plantations.
Revista Brasileira de Ciência do Solo,
Год журнала:
2024,
Номер
48
Опубликована: Янв. 1, 2024
ABSTRACT
Land-use
changes
from
native
pastures
to
forest
plantations
in
humid
temperate
areas
have
raised
concerns
about
their
potential
impact
on
the
environment.
This
study
aimed
assess
effects
of
such
soil
water
properties,
focusing
species
planted
and
relationship
with
C
content.
Specifically,
we
identify
development
surficial
hydrophobicity
holding
capacity.
A
long-term
experiment
variable
planting
densities
(816,
1111,
2066
trees
ha
-1
)
Eucalyptus
grandis
Hill
ex
Maiden
Pinus
taeda
L.
was
established
2004
pasture
vegetation.
Undisturbed
samples
(0.00-0.03
m
layer)
were
extracted
surrounding
repellency
determined
by
drop
penetration
time
(WDPT)
method
at
three
matric
levels
(SMP).
Bootstrapping
used
test
if
sample
size
sufficient
obtain
robust
results.
Replacing
significantly
increased
hydrophobicity,
which
more
pronounced
under
than
taeda.
Soil
decreasing
SMP,
particularly
land-uses
that
generated
higher
initial
hydrophobicity.
Additionally,
soils
cover
had
less
retention
capacity
those
each
larger
differences
when
dried
negative
SMP.
More
research
is
necessary
determine
alterations
converting
climates
will
lead
a
significant
decrease
an
increase
deeper
depths.
IOP Conference Series Earth and Environmental Science,
Год журнала:
2025,
Номер
1445(1), С. 012041 - 012041
Опубликована: Янв. 1, 2025
Abstract
Carbon
negativity
is
one
of
the
promising
strategies
to
uptake
carbon
emissions
from
atmosphere
and
reduce
atmosphere.
Forests
have
been
proven
sequester
atmospheric
through
photosynthesis
store
them
as
tree
biomass.
However,
forest
operations
also
emit
into
via
fertilizer,
pesticides,
fuel
consumption.
This
study
aims
compare
black
locusts
poplar
plantations
in
different
management
systems.
dynamics
short
long-rotation
systems
was
analysed
using
CO
2
FIX
software.
Meanwhile,
emission
estimated
life
cycle
assessment
method.
In
simulation
period
45
years,
locust
long-term
shown
negativity.
The
amount
sequestration
higher
than
emission.
Furthermore,
better
short-rotation
coppice
Plant Cell & Environment,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 21, 2025
Plant
roots
can
detect
and
react
to
the
presence
of
competitors'
roots.
Intraspecific
competition
usually
constrains
root
proliferation
minimize
overlap
systems
between
competitors,
especially
in
resource-impoverished
environments.
However,
it
remains
largely
unclear
whether
how
this
decline
nutrient-scavenging
capacity
be
complemented
by
other
nutrient-acquisition
strategies.
Here,
we
leveraged
25
41-year-old
Pinus
Sylvestris
var.
mongolica
monocultures
with
stand
densities
ranging
from
350
1500
trees
per
hectare,
reflecting
a
gradient
intraspecific
intensity.
In
these
stands,
measured
variables
ecosystem
nitrogen
(N)
status,
needle
N
resorption
efficiency,
nine
morphological,
physiological
mycorrhizal
traits.
Results
showed
that
increasing
decreased
soil
transformation
rates
carbon-:N-acquisition
enzyme
ratios,
indicating
an
degree
deficiency.
High-density
stands
had
lower
length
density
than
low-density
implying
intense
causing
segregation.
Conversely,
was
positively
correlated
relative
abundance
ectomycorrhizal
fungi
(EMF)
genetic
potential
produce
class
II
peroxidases.
Collectively,
findings
highlight
plant-available
may
account
for
segregation
under
suggest
complementarity
fine
EMF
nutrient
acquisition
at
level.
Forests,
Год журнала:
2025,
Номер
16(4), С. 618 - 618
Опубликована: Март 31, 2025
Integrating
different
ecosystem
services
(ES)
to
determine
when
harvest
a
forest
stand
is
still
challenging.
This
due
the
difficulty
of
obtaining
information,
models,
and
methods
quantify
those
ES
achieving
an
adequate
valuation
these
services.
In
this
study,
we
propose
methodology
comprising
two
models
that
could
allow
for
integration
with
optimal
silviculture
calculate
economic
rotation.
We
have
applied
both
eucalyptus
plantations
in
Brazil
considering
ES:
wood
four
assortments
carbon
sequestration.
For
calculated
ranking
previously
defined
management
alternatives,
decreasing
trees-per-hectare
compared
traditional
plantations.
first
model,
are
measured
monetary
units,
rotation
corresponds
fewer
trees
per
hectare
than
greater
associated
profitability.
The
second
model
incorporates
physical
units
through
multi-criteria
decision-making
results
longer
again
hectare.
study
suggests
optimum
analysis
should
consider
other
timber
production
integrated
silvicultural
such
as
spacing.
