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
Frontiers in Plant Science,
Год журнала:
2023,
Номер
14
Опубликована: Авг. 25, 2023
Introduction
With
the
continuous
changes
in
climate
patterns
due
to
global
warming,
drought
has
become
an
important
limiting
factor
development
of
terrestrial
ecosystems.
However,
a
comprehensive
understanding
impact
on
soil
microbial
activity
at
scale
is
lacking.
Methods
In
this
study,
we
aimed
examine
effects
biomass
(carbon
[MBC],
nitrogen
[MBN],
and
phosphorus
[MBP])
enzyme
(β-1,
4-glucosidase
[BG];
β-D-cellobiosidase
[CBH];
β-1,
4-N-acetylglucosaminidase
[NAG];
L-leucine
aminopeptidase
[LAP];
acid
phosphatase
[AP]).
Additionally,
conducted
meta-analysis
determine
degree
which
these
are
regulated
by
vegetation
type,
intensity,
duration,
mean
annual
temperature
(MAT).
Result
discussion
Our
results
showed
that
significantly
decreased
MBC,
MBN,
MBP
levels
BG
AP
22.7%,
21.2%,
21.6%,
26.8%,
16.1%,
respectively.
terms
mainly
affected
MBC
MBN
croplands
grasslands.
Furthermore,
response
ratio
BG,
CBH,
NAG,
LAP
were
negatively
correlated
with
whereas
CBH
duration.
NAG
MAT.
conclusion,
reduced
scale.
highlight
strong
carbon-
phosphorus-acquiring
activity.
