Unraveling the individual and interactive effects of climate and competition on branch growth dynamics in Pinus koraiensis in Northeast China
Frontiers in Plant Science,
Год журнала:
2025,
Номер
16
Опубликована: Фев. 5, 2025
Introduction
The
quantitative
modeling
of
dynamic
branch
growth
in
Korean
pine
(
Pinus
koraiensis
)
and
the
analysis
factors
influencing
are
essential
prerequisites
for
making
scientifically
sound
management
decisions
plantations.
To
date,
effects
competition,
climate
their
interactions
on
have
been
insufficiently
investigated.
Additionally,
limited
knowledge
exists
regarding
whether
these
impacts
vary
depending
social
status
trees.
In
face
current
challenges
posed
by
change,
accurate
information
to
inform
forest
policy-making
is
urgently
needed.
Methods
We
collected
745
branches
from
54
sampled
trees
and,
we
employed
a
mixed-effects
model
assess
tree
variables,
climate,
growth.
Furthermore,
simulated
under
different
combinations
competition
climatic
conditions
provide
practical
targeted
recommendations
plantation
management.
Results
Our
results
demonstrate
that
(1)
addition
age,
size,
height
growth,
significantly
improved
model,
with
surpassing
individual
which
highlights
importance
considering
interactive
effects;
(2)
varied
trees,
dominant
intermediate
individuals
showing
greater
sensitivity
than
suppressed
individuals,
suggesting
that,
future
research
this
direction,
prioritizing
sampling
would
be
cost-effective
approach;
(3)
owing
presence
interactions,
influence
was
modulated
adjusting
levels
response
stress
could
lead
desirable
outcomes.
Discussion
study
underscores
understanding
sources
variation
crucial
advancing
our
crown
dynamics,
as
well
formulating
sustainable
policies
amidst
uncertainties
change.
Язык: Английский
Development of Full Growth Cycle Crown Width Models for Chinese Fir (Cunninghamia lanceolata) in Southern China
Forests,
Год журнала:
2025,
Номер
16(2), С. 353 - 353
Опубликована: Фев. 16, 2025
This
study
focused
on
16,101
Cunninghamia
lanceolata
trees
across
133
plots
in
seven
cities
of
Guangdong
Province,
China,
to
develop
a
comprehensive
full
growth
cycle
crown
width
(CW)
model.
We
systematically
analyzed
the
dynamic
characteristics
CW
and
its
multi-scale
influencing
mechanisms.
A
binary
basic
model,
with
diameter
at
breast
height
(DBH)
(H)
as
core
predictor
variables,
effectively
reflected
tree
patterns.
The
inclusion
age
groups
dummy
variables
allowed
model
capture
changes
different
stages.
Furthermore,
incorporation
nested
two-level
nonlinear
mixed-effects
(NLME)
accounting
for
random
effects
from
forest
block-
sample
plot-level
effects,
significantly
improved
precision
applicability
final
(R2
=
0.731,
RMSE
0.491).
quantified
both
macro-
micro-level
region
plot
CW.
Our
findings
showed
that
NLME
incorporating
groups,
optimally
accounted
environmental
heterogeneity
cycles,
resulting
best-fitting
statistics.
proposed
enhanced
model’s
efficiency
predictive
accuracy
lanceolata,
providing
scientific
support
sustainable
management
monitoring
plantation
forests.
Язык: Английский
National Stand Basal Area, Volume and Biomass Growth Models with the Inclusions of Stand Structure for Larch Plantations in China
Опубликована: Янв. 1, 2025
Язык: Английский
Developing branch diameter and length models for the planted Larix kaempferi from different latitude regions in China
Journal of Forestry Research,
Год журнала:
2025,
Номер
36(1)
Опубликована: Июнь 3, 2025
Язык: Английский
Modeling tree radial growth with competition and crown characteristics from an aerial perspective
Forest Ecology and Management,
Год журнала:
2024,
Номер
576, С. 122387 - 122387
Опубликована: Ноя. 16, 2024
Язык: Английский
Biomechanical Analysis of Camellia oleifera Branches for Optimized Vibratory Harvesting
Agriculture,
Год журнала:
2024,
Номер
14(12), С. 2220 - 2220
Опубликована: Дек. 5, 2024
To
investigate
the
biomechanical
properties
of
Camellia
oleifera
branches
under
two
loading
speeds
within
a
specific
diameter
range,
three-point
bending
tests
were
conducted
using
universal
material–testing
machine.
The
performed
at
10
mm/min
and
20
on
with
diameters
ranging
from
5
mm
to
40
mm.
This
study
aims
provide
insights
into
design
manipulator
gripper
used
in
vibrating
harvester
for
fruit.
Four
main
varieties
tested
determine
their
elastic
modulus.
nonlinear
least
squares
method,
based
hyperbolic
tangent
function,
was
employed
fit
load–deflection
curves
branches.
process
constructed
multi-parameter
transcendental
equations
involving
modulus,
diameter,
speed.
Results
indicated
that
four
exhibited
significant
differences
properties,
modulus
elasticity
459.01
MPa
983.33
MPa.
suggests
variability
performance
among
different
varieties.
For
instance,
Huaxin
demonstrated
highest
rigidity,
while
Huashuo
softer
general.
proposed
empirical
fitting
equations,
when
parameter
k
is
168
±
c
3.102
0.421,
relationship
can
be
predicted
more
accurately.
provides
theoretical
basis
enhancing
efficiency
mechanized
vibratory
picking
optimising
gripper.
Язык: Английский