Global Change Biology,
Год журнала:
2024,
Номер
30(3)
Опубликована: Март 1, 2024
Abstract
Paddy
fields
serve
as
significant
reservoirs
of
soil
organic
carbon
(SOC)
and
their
potential
for
terrestrial
(C)
sequestration
is
closely
associated
with
changes
in
SOC
pools.
However,
there
has
been
a
dearth
comprehensive
studies
quantifying
pools
following
extended
periods
rice
cultivation
across
broad
geographical
scale.
Using
104
paddy
sampling
sites
that
have
continuous
since
the
1980s
China,
we
studied
topsoil
(0–20
cm)
labile
C
(LOC
I),
semi‐labile
II),
recalcitrant
(ROC),
total
SOC.
We
found
substantial
increase
both
content
(48%)
density
(39%)
within
China's
between
to
2010s.
Intriguingly,
rate
ROC
exceeded
LOC
(I
II).
structural
equation
model,
revealed
were
mainly
driven
by
corresponding
shifts
ROC,
which
are
influenced
directly
indirectly
climatic
physicochemical
factors;
particular
temperature,
precipitation,
phosphorous
(P)
clay
content.
also
showed
δ
13
greater
than
,
independent
cropping
region,
was
positive
correlation
straw
.
The
significantly
negative
Si,
suggesting
Si
plays
part
allocation
into
different
pools,
its
turnover
or
stabilization.
Our
study
underscores
global
stems
from
pool.
Global Change Biology,
Год журнала:
2023,
Номер
29(7), С. 1998 - 2014
Опубликована: Фев. 7, 2023
Abstract
Microbial
necromass
is
a
large
and
persistent
component
of
soil
organic
carbon
(SOC),
especially
under
croplands.
The
effects
cropland
management
on
microbial
accumulation
its
contribution
to
SOC
have
been
measured
in
individual
studies
but
not
yet
summarized
the
global
scale.
We
conducted
meta‐analysis
481‐paired
measurements
from
soils
examine
identify
optimal
conditions
for
accumulation.
Nitrogen
fertilization
increased
total
C
by
12%,
cover
crops
14%,
no
or
reduced
tillage
(NT/RT)
20%,
manure
21%,
straw
amendment
21%.
was
independent
biochar
addition.
NT/RT
fungal
more
than
bacterial
necromass.
Manure
higher
fungal,
leading
decreased
ratio
fungal‐to‐bacterial
Greater
increases
after
amendments
were
common
semi‐arid
cool
climates
with
pH
<8,
proportional
amount
input.
In
contrast,
mainly
warm
humid
climates.
application
irrespective
properties
climate.
Management
strong
when
applied
during
medium
(3–10
years)
long
(10+
periods
larger
initial
contents,
absent
sandy
soils.
Close
positive
links
between
biomass,
indicate
important
role
stabilized
products
accrual.
increment
(accumulation
efficiency)
NT/RT,
crops,
ranged
45%
52%,
which
9%–16%
N
fertilization.
summary,
long‐term
enhancing
accumulation,
optimizing
sequestration
requires
site‐specific
management.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Янв. 8, 2024
Abstract
Increasing
soil
organic
carbon
(SOC)
in
croplands
by
switching
from
conventional
to
conservation
management
may
be
hampered
stimulated
microbial
decomposition
under
warming.
Here,
we
test
the
interactive
effects
of
agricultural
and
warming
on
SOC
persistence
underlying
mechanisms
a
decade-long
controlled
experiment
wheat-maize
cropping
system.
Warming
increased
content
accelerated
fungal
community
temporal
turnover
agriculture
(no
tillage,
chopped
crop
residue),
but
not
(annual
residue
removed).
Microbial
use
efficiency
(CUE)
growth
linearly
over
time,
with
stronger
positive
after
5
years
agriculture.
According
structural
equation
models,
these
increases
arose
greater
inputs
crops,
which
indirectly
CUE
via
changes
communities.
As
result,
necromass
28
53%,
emerging
as
strongest
predictor
content.
Collectively,
our
results
demonstrate
how
climatic
factors
can
interact
alter
composition,
physiology
functions
and,
turn,
formation
accrual
croplands.
Global Change Biology,
Год журнала:
2023,
Номер
29(13), С. 3575 - 3590
Опубликована: Апрель 6, 2023
Enhancing
soil
organic
carbon
(SOC)
sequestration
and
food
supply
are
vital
for
human
survival
when
facing
climate
change.
Site-specific
best
management
practices
(BMPs)
being
promoted
adoption
globally
as
solutions.
However,
how
SOC
crop
yield
related
to
each
other
in
responding
BMPs
remains
unknown.
Here,
path
analysis
based
on
meta-analysis
machine
learning
was
conducted
identify
the
effects
potential
mechanisms
of
relationship
between
responds
site-specific
China.
The
results
showed
that
could
significantly
enhance
maintain
or
increase
yield.
maximum
benefits
(30.6%)
(79.8%)
occurred
mineral
fertilizer
combined
with
inputs
(MOF).
Specifically,
optimal
would
be
achieved
areas
were
arid,
pH
≥7.3,
initial
content
≤10
g
kg-1
,
duration
>10
years,
nitrogen
(N)
input
level
100-200
kg
ha-1
.
Further
revealed
original
change
an
inverted
V-shaped
structure.
association
changes
might
linked
positive
role
nutrient-mediated
effect.
generally
suggested
improving
can
strongly
support
better
performance.
Limitations
increasing
still
exist
due
low
level,
regions
where
excessive
N
inputs,
inappropriate
tillage
is
inadequate
diminished
by
optimizing
harmony
conditions.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Апрель 22, 2024
Abstract
A
central
role
for
nature-based
solution
is
to
identify
optimal
management
practices
address
environmental
challenges,
including
carbon
sequestration
and
biodiversity
conservation.
Inorganic
fertilization
increases
plant
aboveground
biomass
but
often
causes
a
tradeoff
with
diversity
loss.
It
remains
unclear,
however,
whether
organic
fertilization,
as
potential
solution,
could
alter
this
by
increasing
without
Here
we
compile
data
from
537
experiments
on
inorganic
across
grasslands
croplands
worldwide
evaluate
the
responses
of
biomass,
diversity,
soil
(SOC).
Both
increase
56%
42%
relative
ambient,
respectively.
However,
only
decreases
while
in
greater
water
content.
Moreover,
SOC
19%
15%
ambient
The
positive
effect
mean
annual
temperature
grasslands,
pattern
not
observed
croplands.
Collectively,
our
findings
highlight
that
can
two
ecosystem
services
forage
production,
storage,
