Proceedings of the National Academy of Sciences,
Journal Year:
2024,
Volume and Issue:
122(1)
Published: Dec. 31, 2024
Increasing
soil
organic
carbon
(SOC)
in
agricultural
systems
is
a
primary
nature-based
option
for
mitigating
climate
change,
improving
fertility,
and
ensuring
food
security.
However,
the
consequences
of
global
warming
increases
inputs
on
cropland
SOC
stocks
over
last
few
decades
remain
largely
unknown,
particularly
deeper
layers.
Here,
by
using
repeated
measurements,
we
reassess
variations
across
0
to
100
cm
profile
at
same
locations
China’s
upland
croplands
1980
2023.
We
observe
an
overall
net
accumulation
0.74
Pg
(7%)
with
mean
sequestration
rate
13.7
g
m
−2
y
−1
.
This
results
from
0.86
gains
upper
depths
(0
60
cm)
induced
inputs,
alongside
0.12
losses
layers
(60
prompted
warming-enhanced
decomposition.
While
our
findings
indicate
successful,
though
lower
than
expected,
increase
stocks,
loss
more
recalcitrant
warrants
further
consideration
its
effects
enhancing
achieve
neutrality
long
term.
Global Change Biology,
Journal Year:
2025,
Volume and Issue:
31(1)
Published: Jan. 1, 2025
Soil
microorganisms
transform
plant-derived
C
(carbon)
into
particulate
organic
(POC)
and
mineral-associated
(MAOC)
pools.
While
microbial
carbon
use
efficiency
(CUE)
is
widely
recognized
in
current
biogeochemical
models
as
a
key
predictor
of
soil
(SOC)
storage,
large-scale
empirical
evidence
limited.
In
this
study,
we
proposed
experimentally
tested
two
predictors
POC
MAOC
pool
formation:
necromass
(using
amino
sugars
proxy)
CUE
(by
18O-H2O
approach).
sampling
(0-10
10-20
cm
depth)
was
conducted
along
climatic
transect
900
km
on
the
Loess
Plateau,
including
cropland,
grassland,
shrubland,
forest
ecosystems,
to
ensure
homogeneous
parent
material.
We
found
highest
accumulation
occurred
zones
MAT
between
5°C
10°C
or
MAP
300
500
mm.
Microbial
more
positively
related
than
(p
<
0.05),
suggesting
that
residues
may
improve
strongly
compared
pool.
Random
linear
regression
analyses
showed
increased
with
fungal
C,
whereas
bacterial
drove
MAOC.
coupled
0.05)
but
decoupled
SOC
>
0.05).
The
have
faster
turnover
rate
due
lack
clay
protection,
which
lead
rapid
thus
their
decoupling
from
CUE.
sense,
driven
by
necromass,
explains
dynamics.
Our
findings
highlight
insufficiency
relying
solely
predict
bulk
storage.
Instead,
propose
should
be
used
together
explain
dynamics,
each
influencing
distinct
European Journal of Soil Science,
Journal Year:
2025,
Volume and Issue:
76(1)
Published: Jan. 1, 2025
ABSTRACT
Over
the
past
60
years,
efforts
to
enhance
agricultural
productivity
have
mainly
focussed
on
optimising
strategies
such
as
use
of
inorganic
fertilisers,
advancements
in
microbiology
and
improved
water
management
practices.
Here,
we
emphasise
critical
role
pedology
a
foundation
soil
long‐term
sustainability.
We
will
demonstrate
how
overlooking
intrinsic
properties
soils
can
result
detrimental
effects
overall
Communication
between
academia,
extension
experts,
consultants
farmers
often
results
an
overemphasis
surface
layer,
for
example,
20
40
cm,
neglecting
functions
that
occur
at
depth.
Soil
health
regenerative
agriculture
must
be
coupled
with
understanding
dynamic
system.
find
pedological
knowledge
digital
mapping
technologies
are
underused
achieving
sustainable
agriculture.
By
bridging
gap
emerging
technologies,
provide
land
users
tools
needed
make
informed
decisions,
ensuring
their
practices
not
only
increase
production
but
also
preserve
future
generations.
Global Change Biology,
Journal Year:
2025,
Volume and Issue:
31(3)
Published: March 1, 2025
ABSTRACT
Separating
soil
organic
carbon
(SOC)
into
mineral‐associated
(MAOC)
and
particulate
(POC)
enables
accurate
prediction
of
SOC
vulnerability
to
land
use
change
(LUC).
Here,
we
synthesize
the
responses
MAOC
POC
LUC,
including
restoration
degradation,
from
693
observations
globally.
We
observed
a
large
increase
in
after
greater
decline
but
magnitude
proportion
these
two
fractions
(fMAOC
fPOC)
varied
with
LUC.
POC,
comparison
MAOC,
responded
more
sensitively
suggesting
that
was
vulnerable
environmental
change.
Using
duration
relationships,
found
fraction
(fPOC)
higher
at
early
stage
lower
late
stage,
projecting
stability
declined
short‐term
gradually
increased
long‐term
restoration.
Further
analysis
showed
context‐dependent
effects
LUC
on
fractions:
arid
or
carbon‐poor
topsoil,
greatly
fPOC,
while
humid
carbon‐rich
degradation
resulted
decreases
especially
POC.
Overall,
highlight
importance
fractions,
particularly
predicting
suggest
incorporating
climate
initial
status
models
dynamics
helps
accurately
predict
future
sink
potential.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Nov. 2, 2024
Soil
microbial
growth,
a
vital
biogeochemical
process,
governs
both
the
accrual
and
loss
of
soil
carbon.
Here,
we
investigate
biogeography
microbiome
potential
growth
rates
show
that
microbiomes
in
resource-rich
(high
organic
matter
nutrients)
acid-neutral
soils
from
cold
humid
regions
exhibit
high
growth.
Conversely,
resource-poor,
dry,
hot,
hypersaline
soils,
display
lower
rates,
suggesting
trade-offs
between
resource
acquisition
or
stress
tolerance.
In
addition,
positively
correlates
with
genome
size
number
ribosomal
RNA
operons
but
negatively
optimum
temperature,
biomass
carbon-to-phosphorus
nitrogen-to-phosphorus
ratios.
The
spatial
variation
aligns
several
macroecological
theories.
These
findings
not
only
enhance
our
understanding
adaptation
to
diverse
environments
also
aid
realistically
parameterizing
physiology
carbon
cycling
models.
controls
sequestration.
authors
resource-rich,
neutral
areas
have
higher
than
dry
hot
regions,
demonstrating
adaptations.
Plants,
Journal Year:
2025,
Volume and Issue:
14(3), P. 417 - 417
Published: Jan. 31, 2025
Mycorrhizal
symbiosis
has
been
the
focus
of
research
for
more
than
a
century
due
to
positive
effect
fungi
on
growth
majority
woody
plants.
The
extramatrical
mycelium
(EMM)
ectomycorrhiza
(EMR)
accounts
up
one-third
total
soil
microbial
biomass,
whereas
litter
from
this
short-living
pool
60%
litterfall
mass
in
forest
ecosystems.
functioning
EMR
improves
nitrogen
(N)
nutrition
trees
and
thus
contributes
carbon
(C)
balance
soils.
model
presented
here
is
an
attempt
describe
these
functions
quantitatively.
It
calculates
EMM
subsequent
"mining"
additional
recalcitrant
organic
matter
(SOM)
growth,
with
associated
formation
"dissolved
carbon".
decomposition
carried
out
by
all
organisms
food
webs,
forming
available
NH4+
first
phase
then
solid-phase
by-products
(excretes)
as
new
labile
SOM
pool.
These
substances
are
feedback
that
determines
role
vegetation.
A
sensitivity
analysis
revealed
leading
C:N
ratio
biotic
components
dynamics
EMM.
validation
showed
satisfactory
agreement
between
simulated
observed
data
relation
respiration
larch
plantations
different
ages.
Model
testing
within
EFIMOD3
system
allowed
quantitative
assessment
contribution
ecosystem
respiration.
demonstrated
adequacy
theoretical
background
used
model,
fast
cycle
biota
webs
without
direct
resource
exchange
plants
fungi.
