Can fine sediment addition promote carbon stabilization in coastal wetland soils? A laboratory experiment
Soil Science Society of America Journal,
Год журнала:
2025,
Номер
89(2)
Опубликована: Март 1, 2025
Abstract
Scientists
are
increasingly
exploring
soil
carbon
(C)
stabilization
processes
that
protect
organic
C
from
microbial
decomposition.
Mineral‐associated
matter
(MAOM)
is
considered
one
of
the
most
protected
pools
C,
but
remains
understudied
in
wetland
soils
relative
to
upland
soils.
Using
complementary
intact
core
and
bottle
incubation
studies,
this
research
investigated
how
fine
sediment
addition,
form
dredged
sediment,
impacts
respiration
MAOM
coastal
vary
by
(SOM)
content
particle
size.
We
hypothesized
additions
would
reduce
increase
pools,
with
greatest
response
addition
being
high
SOM
soil.
Contrary
our
prediction,
sediments
cores
did
not
change
rate,
CO
2
production
rate
decreased
21%
low
cores,
mass
MAOM‐C
increased
23%
after
receiving
additions.
In
study
only,
varied
initial
Specifically,
largest
particles
(>2
mm)
showed
a
1727%
MAOM‐C,
which
coincides
49%
decrease
CH
4
rate.
Overall,
protection
resulting
differed
type
texture,
suggesting
properties
(e.g.,
existing
mineral
content,
nutrient
availability,
degree
decomposition)
influence
through
these
should
be
when
choosing
potential
restoration
sites.
Язык: Английский
Tillage Radish as Cover Crop Improves Soil Health Indicators Depending on Pedoclimatic Conditions
Soil Use and Management,
Год журнала:
2025,
Номер
41(2)
Опубликована: Апрель 1, 2025
ABSTRACT
Replacing
fallow
periods
with
cover
crops
(CCs)
is
a
key
conservation
agriculture
measure
to
enhance
soil
health,
yet
its
effectiveness
depends
on
pedoclimatic
conditions.
However,
the
effects
of
CCs,
such
as
tillage
radish
(TR),
health
indicators
under
different
environmental
and
management
conditions
remain
insufficiently
unexplored.
This
study
assessed
TR
related
carbon
(C),
nitrogen
(N),
phosphorus
(P)
cycling
in
two
locations
(Signa
–SN–
Cesa
–CS–)
Biomass
accumulation
P
uptake
by
were
significantly
higher
at
SN
than
CS,
likely
due
more
favourable
climatic
The
biomass
resulted
threefold
organic
(SOC)
upper
5
cm
compared
CS.
increased
SOC,
labile
C,
test,
microbial
N,
P,
although
most
varied
location.
Soil
test
biomass,
confirming
role
mobilisation.
At
SN,
improved
retention
about
34
mg
N
kg
−1
management.
These
findings
highlight
TR's
positive
some
relevant
ecosystem
services,
particularly
C
storage,
mobilisation
recycling,
balance,
site‐specific
variations
depending
Future
studies
should
explore
long‐term
impacts
fertility
nutrient
across
diverse
agroecosystems,
involving
practices
for
solid
practical
recommendations.
Язык: Английский