Agronomy,
Journal Year:
2024,
Volume and Issue:
14(10), P. 2272 - 2272
Published: Oct. 2, 2024
Soil
organic
matter
(SOM)
is
an
important
carbon
pool
in
terrestrial
ecosystems
and
plays
a
key
role
soil
functions.
Nevertheless,
the
effects
of
fertilization
practices
on
physical,
chemical,
biological,
comprehensive
stability
SOM
are
still
unclear.
We
carried
out
long-term
field
experiment
northeast
black
region
China
with
four
different
practices:
no
fertilizer
(CK),
single
chemical
(NPK),
+
straw
(NPKJ),
manure
(NPKM).
The
content
particulate
(POM)
mineral-associated
(MAOM),
compound
composition
SOM,
mineralization
characteristics,
active
(ASOM),
inert
(ISOM)
were
tested.
results
showed
that
application
fertilizers
significantly
increased
contents
POM
MAOM
to
2.59–4.65
g
kg−1
32.69–34.65
(p
<
0.05),
but
decreased
MAOM/POM
values
by
37.8–42.4%,
indicating
reduced
physical
SOM.
Fertilization
aromatic,
nitrogen-containing
compounds
oxygen
representing
enhancement
stability.
ASOM
ISOM
practices,
while
biological
index
(BSI)
under
NPKJ
NPKM
treatments
was
lower
than
CK
treatment,
suggesting
application.
In
addition,
26–116%
through
reduction
stability,
coupled
increase
Collectively,
our
study
demonstrated
enhanced
both
stabilities
increasing
which
made
largest
contribution
CABI Reviews,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 4, 2024
Abstract
Soil
organic
carbon
(SOC)
sequestration
promotes
several
ecological,
economic,
and
social
co-benefits.
However,
most
SOC
studies
rely
on
topsoil
evaluations
(0–30
cm),
disregarding
a
significant
fraction
of
the
that
is
stored
in
deep
layers.
Understanding
relationship
between
soil
climate
change
imperative
guiding
sustainable
land
management
practices,
informing
mitigation
strategies,
preserving
crucial
role
regulating
atmospheric
CO
2
levels.
We
conducted
comprehensive
literature
review
to
discuss
origins
carbon,
globally
standardized
methodology
recommended
for
measuring
stocks,
mechanisms
controlling
(physical,
chemical,
biochemical)
layers,
significance
microbial
community
advancements
radiocarbon
studies,
impact
practices
SOC,
influence
stocks.
Overall,
more
empirical
data
long-term
are
needed
address
knowledge
gaps
terms
advance
our
understanding
shaping
global
cycles
resilience.
The
main
challenges
accurate
estimations
budgets
high
spatial
variability,
relative
lack
measurements,
need
reliable
reference
modeling
improvements.
A
practical
bulk
density
(BD)
estimation
layers
(i.e.,
30–100
cm)
improve
accuracy
C
stock
should
be
addressed
further
studies.
Modeling
approaches
based
sensors
machine
learning
techniques
promising
tools
overcome
this
challenge.
there
still
large
variability
methods
measure
report
BD
stocks
worldwide,
preventing
advances.
Resources Environment and Sustainability,
Journal Year:
2024,
Volume and Issue:
17, P. 100166 - 100166
Published: Aug. 10, 2024
Direct
land
application
of
conventional
compost
may
cause
ecological
risks
due
to
the
presence
heavy
metals.
To
effectively
reduce
metal
bioavailability
in
compost,
a
multi-component
passivator
comprising
Candida
utilis,
sodium
humate,
zeolite
and
attapulgite
was
developed,
which
showed
passivation
rates
59.28%,
86.93%
38.95%
for
zinc
(Zn),
copper
(Cu),
ferrum
(Fe),
respectively,
compost.
The
addition
customized
not
only
reduced
mobility
metals,
but
also
improved
quality
further
increased
abundance
lignocellulose-degrading
beneficial
microorganisms
Subsequent
fertilization
results
that
product
fermented
with
greatly
growth
Chinese
cabbage,
significant
increases
height,
weight,
root
length,
total
chlorophyll
contents
97.63%,
210.13%,
20.42%,
40.38%,
respectively.
It
can
be
concluded
custom-made
is
expected
good
additive
passivation,
high-quality
plant
growth.
Agronomy,
Journal Year:
2024,
Volume and Issue:
14(11), P. 2728 - 2728
Published: Nov. 19, 2024
The
aim
of
this
study
is
to
accurately
evaluate
the
quality
characteristics
whole
tillage
cropland
and
deepen
knowledge
sub-tillage
soil
evaluation
in
Jilin
Province,
China.
In
study,
top-tillage
samples
were
collected
from
185
maize
continuous
cropping
areas
12
physicochemical
indexes
(pH,
cation
exchange
capacity
(CEC),
organic
matter
(SOM),
total
nitrogen
(TN),
phosphorus
(TP),
potassium
(TK),
available
(AN),
(AP),
(AK),
sand,
silt,
clay)
used
layer
index
(SQI).
results
showed
that
Province
generally
above
moderate
level,
nutrient
contents
increased
West
East
among
regions.
minimum
data
set
SQI
(SQI-MDS)
layers
0.22–0.98
(0.46)
0.23–0.93
(0.55),
respectively.
suitable
ranges
MDS
parameters
for
reasonable
as
follows:
SOM
≥
34.5
g
kg−1,
31.5%
≤
sand
53.5%,
AP
32.1
mg
TK
15.18
kg−1;
31.3%
51.2%,
TN
1.48
6.4
pH
7.1,
AK
157.6
kg−1.
summary,
different
ecological
zones
are
varied.
It
necessary
adjust
thresholds
combination
with
actual
conditions
establish
a
more
accurate
system
quality.
Soil Use and Management,
Journal Year:
2024,
Volume and Issue:
40(4)
Published: Oct. 1, 2024
Abstract
The
increasing
need
for
sustainable
agricultural
practices
and
climate
change
mitigation
has
driven
research
into
biochar's
role
in
enhancing
soil
carbon
(C)
sequestration
fertility.
This
study
aimed
to
investigate
the
long‐term
effects
of
sewage
sludge
biochar
(SSB),
prepared
at
different
temperatures
(300
500°C),
combined
or
not
with
mineral
fertilizer
application,
on
C
stocks
organic
matter
fractions,
addressing
whether
SSB
can
improve
sequestration.
In
first
two
growing
seasons
(2015–2016),
was
applied
15
t
ha
−1
(dry
weight)
per
crop
incorporated
top
0.2
m
using
a
rotary
hoe
before
planting.
Over
7
years,
samples
were
collected
from
0–0.2
depth
post‐harvest
each
season
analyse
total
C,
N,
various
including
easily
oxidizable
permanganate‐oxidizable
non‐oxidizable
humic
substances,
particulate
mineral‐associated
C.
Results
demonstrate
that
application
enhances
(up
9.5%)
N
levels
28.8%),
indicating
improved
fertility
potential.
Notably,
amendments
increased
pool
11.9%),
contributing
stabilization.
While
under
300°C
7.7%),
permanganate
affected
by
treatments,
suggesting
primarily
affects
more
recalcitrant
essential
Additionally,
substantially
yield,
higher
grain
yield
105.0%)
shoot
biomass
75.1%)
observed
over
multiple
seasons.
However,
decline
corn
fourth
onwards
SSB‐only
treatments
highlights
limited
capacity
sustain
productivity.
These
findings
underscore
effectiveness
pools
its
potential
practices.
Future
should
focus
field
studies
environmental
conditions
explore
co‐pyrolysis
other
feedstocks
enhance
stability.
broader
adoption
technology
could
play
vital
mitigating
promoting
development.