Current Research in Environmental Sustainability,
Journal Year:
2023,
Volume and Issue:
5, P. 100214 - 100214
Published: Jan. 1, 2023
Soil
organic
carbon
(SOC),
mineralization
and
microbial
community
structures
were
investigated
at
different
depths
of
farmland
soils
4
years
after
a
single
biochar
amendment.
Biochar
increased
SOC
0-20cm
(10.7%)
20-40cm
(24.9%).
Mineralization
decreased
with
depth
further
12.3%
(0-20cm),
8.5%
(20-40cm)
30.5%
(40-60cm)
Subsoils
selected
for
oligotrophs
(e.g.,
Chloroflexi,
Acidobacteria)
associated
lower
rates
limited
copiotrophs
Proteobacteria,
Ascomycota)
which
exhibit
higher
respiration
rates.
enhanced
in
topsoil
restricted
all
depths.
This
demonstrates
how
increases
stability
by
changing
Global Change Biology,
Journal Year:
2023,
Volume and Issue:
29(19), P. 5677 - 5690
Published: July 31, 2023
Abstract
Cover
crops
increase
carbon
(C)
inputs
to
agricultural
soils,
and
thus
have
the
potential
mitigate
climate
change
through
enhanced
soil
organic
(SOC)
storage.
However,
few
studies
explored
fate
of
belowground
C
associated
with
varying
root
traits
into
distinct
SOC
pools
mineral‐associated
(MAOC)
particulate
(POC).
Therefore,
a
packed
0.5
m
column
trial
was
established
0.25
topsoil
subsoil
four
cover
species
(winter
rye,
oilseed
radish,
chicory,
hairy
vetch)
known
differ
in
C:N
ratio
morphology.
were
14
CO
2
‐labeled
for
3
months,
then,
half
columns
sampled
quantify
rhizodeposition
C.
In
remaining
columns,
plant
shoots
harvested
undisturbed
roots
left
incubation.
Bulk
from
both
sampling
times
subjected
simple
fractionation
scheme,
where
<50
>50
μm
fraction
assumed
represent
MAOC
POC,
respectively.
The
fast‐growing
rye
radish
produced
highest
percentage
loss
via
(%ClvR)
showed
pattern,
22%
more
branched
(rye
6%–8%
less
(radish
chicory).
This
suggests
that
morphology
plays
key
role
determining
After
1
year
incubation
at
room
temperature,
POC
positively
correlated
absolute
terms.
formation
efficiencies
(cover
crop‐derived
as
share
inputs)
higher
vetch
(21%
15%,
respectively)
than
chicory
(9%
10%,
respectively),
suggesting
greater
importance
(or
indirectly,
morphology)
solely
substrate
longer
term
stabilization.
ISME Communications,
Journal Year:
2024,
Volume and Issue:
4(1)
Published: Jan. 1, 2024
Abstract
Not
all
bacteria
are
fast
growers.
In
soil
as
in
other
environments,
exist
along
a
continuum—from
copiotrophs
that
can
grow
rapidly
under
resource-rich
conditions
to
oligotrophs
adapted
life
the
“slow
lane.”
However,
field
of
microbiology
is
built
almost
exclusively
on
study
due,
part,
ease
studying
them
vitro.
To
begin
understanding
attributes
oligotrophs,
we
analyzed
three
independent
datasets
represent
contrasts
organic
carbon
availability.
These
included
185
samples
collected
from
profiles
across
USA,
950
paired
bulk
and
rhizosphere
Europe,
soils
microcosm
experiment
where
availability
was
manipulated
directly.
Using
combination
marker
gene
sequencing
targeted
genomic
analyses,
identified
specific
oligotrophic
taxa
were
consistently
more
abundant
carbon-limited
environments
(subsurface,
bulk,
unamended
soils)
compared
corresponding
carbon-rich
environment
(surface,
rhizosphere,
glucose-amended
soils),
including
members
Dormibacterota
Chloroflexi
phyla.
general,
putative
had
smaller
genomes,
slower
maximum
potential
growth
rates,
under-represented
culture
collections.
The
genomes
likely
be
enriched
pathways
allow
metabolize
range
energy
sources
store
carbon,
while
genes
associated
with
energy-intensive
functions
like
chemotaxis
motility
under-represented.
few
shared,
highlighting
use
different
metabolic
strategies
regulatory
thrive
resource-limited
soils.
Carbon Balance and Management,
Journal Year:
2024,
Volume and Issue:
19(1)
Published: Jan. 26, 2024
Abstract
Background
As
interest
in
the
voluntary
soil
carbon
market
surges,
registries
have
been
developing
new
measurement,
reporting,
and
verification
(MRV)
protocols.
These
protocols
are
inconsistent
their
approaches
to
measuring
organic
(SOC).
Two
areas
of
concern
include
type
SOC
stock
accounting
method
(fixed-depth
(FD)
vs.
equivalent
mass
(ESM))
sampling
depth
requirement.
Despite
evidence
that
fixed-depth
measurements
can
result
error
because
changes
bulk
density
30
cm
neglects
a
significant
portion
profile’s
stock,
most
MRV
do
not
specify
which
use
only
require
cm.
Using
data
from
UC
Davis’s
Century
Experiment
(“Century”)
UW
Madison’s
Wisconsin
Integrated
Cropping
Systems
Trial
(WICST),
we
quantify
differences
estimated
by
FD
ESM
over
20
years,
investigate
how
at-depth
(>
cm)
affects
change
estimates,
estimate
crediting
outcomes
taking
an
empirical
sampling-only
approach
differ
when
stocks
calculated
using
or
at
different
depths.
Results
We
find
estimates
100
percent
that,
as
expected,
much
this
difference
is
associated
with
surface
soils
(e.g.,
r
=
0.90
for
maize
treatments).
This
led
substantial
between
FD-based
stocks,
although
many
treatments
did
receive
credits
due
declines
time.
While
increased
variability
makes
it
challenging
accurately
across
profile,
60
capture
density,
potential
redistribution,
larger
proportion
overall
stock.
Conclusions
(using
multiple
increments)
should
be
considered
best
practice
quantifying
annual,
row
crop
agroecosystems.
For
markets,
cost
achieving
accurate
reflect
management
impacts
on
reflected
price
credits.
Agriculture Ecosystems & Environment,
Journal Year:
2024,
Volume and Issue:
365, P. 108925 - 108925
Published: Feb. 9, 2024
Enhancing
biomass
yield
simultaneously
with
soil
carbon
(C)
sequestration
is
a
key
aim
of
climate-smart
cropping
systems.
Perennialization
believed
to
be
suitable
mitigation
strategy
for
climate
change
the
potential
enhancing
C
stocks.
Based
on
nine-year
field
experiment
in
Denmark,
we
measured
changes
and
nitrogen
(N)
stocks,
yield,
stability
three
perennial
(low-fertilized
miscanthus,
high-fertilized
festulolium,
no
N-fertilized
grass-legume
mixture)
two
annual
(continuous
triticale
maize)
We
found
that
topsoil
(0–20
cm)
0–100
cm
stocks
N
varied
significantly
between
Over
nine
years,
increased
by
an
average
1.4
Mg
ha−1
systems,
while
they
decreased
3.4
The
6.8
systems
2.3
system,
but
2.5
maize
system.
Topsoil
0.18
0.08
Changes
did
not
differ
Miscanthus,
showed
highest
(17.1,
16.7,
16.4
year−1,
respectively).
There
were
significant
differences
among
stability.
This
study
demonstrated
obtaining
higher
compared
maintaining
high
supporting
perennialization
as
promising
option
agriculture.
mBio,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 24, 2025
ABSTRACT
Soil
microbial
diversity
and
community
life
strategies
are
crucial
for
nutrient
cycling
during
vegetation
restoration.
Although
the
changes
in
topsoil
communities
restoration
have
been
extensively
studied,
structure,
strategies,
function
of
subsoil
remain
poorly
understood,
especially
regarding
their
role
In
this
study,
we
conducted
a
comprehensive
investigation
soil
community,
assembly
process,
functional
genes
profiles
(0–100
cm)
across
36
year
chronosequence
(5,
15,
28,
years)
fenced
grassland
one
grazing
on
Loess
Plateau
China.
Our
results
revealed
that
organic
carbon
increased
by
76.0%
91.6%
after
years
The
bacterial
were
influenced
primarily
depth,
while
fungal
highly
sensitive
to
Microbes
recovered
faster,
structure
gradually
became
more
consistent
following
addition,
observed
transition
history
from
persistent
K
-strategy
rapid
r
Notably,
process
played
an
important
genes,
which
accompanied
fixation
nitrogen
mineralization
function.
Overall,
our
findings
provide
several
novel
insights
into
impact
profile
IMPORTANCE
study
microbes
faster
than
those
topsoil,
contributed
reduction
differences
distribution
throughout
process.
Importantly,
plays
pivotal
driving
such
as
mineralization,
alongside
degradation
gene
abundance.
These
alterations
increase
availability
understanding
critical
facilitate
accumulation
This
insight
can
guide
development
manipulating
nutrients
grasslands.
