Geoderma,
Год журнала:
2023,
Номер
430, С. 116357 - 116357
Опубликована: Янв. 25, 2023
While
the
responses
of
soil
organic
carbon
(SOC)
dynamics
to
atmospheric
nitrogen
(N)
deposition
have
been
widely
investigated,
little
is
known
in
terms
if,
and
how
are
modulated
by
topography.
Here,
a
N
addition
experiment
with
three
levels,
i.e.,
0,
50
100
kg
ha−1
yr−1,
was
carried
out
valley
on
slope
subtropical
karst
forest.
Soil
type
Cambisols
but
Luvisols
developed
mixture
limestone
dolomite.
Bulk
SOC
content
marginally
(p
<
0.1)
enhanced
attributed
stimulation
both
particulate
C
(POC)
mineral-associated
(MAOC),
that
not
significantly
altered
owing
POC
suppressed
MAOC
under
addition.
High
(100
yr−1)
increased
through
accelerating
aboveground
litter
input,
via
increasing
use
efficiency
(CUE)
necromass
formation
valley.
On
slope,
high
stimulated
increase
fine
root
biomass,
inhibited
due
decrease
microbial
accumulation.
Our
results
suggest
impacts
hence
persistence
likely
topography,
so
provide
novel
view
underlying
differential
pool
Ecology and Evolution,
Год журнала:
2024,
Номер
14(3)
Опубликована: Март 1, 2024
Abstract
Ecological
stoichiometry
is
an
important
approach
to
understand
plant
nutrient
cycling
and
balance
in
the
forest
ecosystem.
However,
understanding
of
stoichiometric
patterns
through
leaf‐litter‐soil
system
Mongolian
pine
among
different
stand
origins
still
scarce.
Therefore,
reveal
variations
carbon
(C),
nitrogen
(N),
phosphorus
(P)
homeostasis
origins,
we
measured
C,
N,
P
concentrations
leaves,
litter,
soil,
analyzed
resorption
efficiencies
leaves
differently
aged
plantations
natural
forests
from
semi‐arid
dry
sub‐humid
regions.
The
results
showed
that
(1)
origin
had
a
significant
effect
on
C–N–P
stoichiometry,
also
significantly
affected
leaf
N
reabsorption
efficiencies.
Leaf
N/P
ratios
indicated
was
co‐limited
by
NF,
HB
HQ,
mainly
limited
MU.
(2)
With
increasing
age,
C
initially
increased
then
decreased,
were
gradually
increased.
Overall,
age
concentrations,
C/N
C/P
system.
(3)
elements
between
strong
coupling
relationship,
element
litter‐soil
relationship.
In
addition,
exhibited
greater
than
forests,
alone,
which
may
be
utilization
strategy
for
alleviate
or
limitation.
(4)
Environmental
factors
have
influence
system,
most
soil
properties
meteorological
being
water
content
precipitation,
respectively.
These
will
essential
provide
guidance
plantation
restoration
management
desert
Geoderma,
Год журнала:
2023,
Номер
430, С. 116357 - 116357
Опубликована: Янв. 25, 2023
While
the
responses
of
soil
organic
carbon
(SOC)
dynamics
to
atmospheric
nitrogen
(N)
deposition
have
been
widely
investigated,
little
is
known
in
terms
if,
and
how
are
modulated
by
topography.
Here,
a
N
addition
experiment
with
three
levels,
i.e.,
0,
50
100
kg
ha−1
yr−1,
was
carried
out
valley
on
slope
subtropical
karst
forest.
Soil
type
Cambisols
but
Luvisols
developed
mixture
limestone
dolomite.
Bulk
SOC
content
marginally
(p
<
0.1)
enhanced
attributed
stimulation
both
particulate
C
(POC)
mineral-associated
(MAOC),
that
not
significantly
altered
owing
POC
suppressed
MAOC
under
addition.
High
(100
yr−1)
increased
through
accelerating
aboveground
litter
input,
via
increasing
use
efficiency
(CUE)
necromass
formation
valley.
On
slope,
high
stimulated
increase
fine
root
biomass,
inhibited
due
decrease
microbial
accumulation.
Our
results
suggest
impacts
hence
persistence
likely
topography,
so
provide
novel
view
underlying
differential
pool
