Agriculture,
Journal Year:
2024,
Volume and Issue:
14(7), P. 1083 - 1083
Published: July 5, 2024
Comprehending
the
impacts
of
land-use
type
on
soil
nutrition
and
stoichiometry
in
watersheds
is
crucial
for
effective
regional
ecosystem
management.
However,
a
deeper
understanding
influence
karst
agricultural
still
lacking.
Here,
we
analyzed
contents,
stoichiometries,
drivers
topsoil
C,
N,
P
watershed
China,
focusing
six
types:
paddy
fields,
dry
farmland,
tussock
land,
shrubland,
shrubby
woodland.
We
found
that
woodland
exhibited
significantly
higher
organic
carbon
(SOC)
content
than
other
types
except
shrubland.
Moreover,
highest
total
nitrogen
(TN)
phosphorus
(TP)
contents
compared
with
types.
C/N
N/P
ratios
did
not
vary
type,
whereas
farmland
(18.68)
showed
lower
C/P
ratio
(39),
shrubland
(39.92),
fields
(34.87).
In
addition,
our
results
revealed
pH,
catalase
invertase
activity,
bacterial
actinomycetes
abundance
influenced
stoichiometry.
These
findings
reveal
interactions
between
multiple
biotic
abiotic
factors
drive
variability
stoichiometry,
offering
valuable
insight
land
improvement
ecological
management
watersheds.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(6), P. 2786 - 2797
Published: Feb. 5, 2024
Understanding
the
underlying
mechanisms
of
soil
microbial
nitrogen
(N)
utilization
under
land
use
change
is
critical
to
evaluating
N
availability
or
limitation
and
its
environmental
consequences.
A
combination
gross
production
ecoenzymatic
stoichiometry
provides
a
promising
avenue
for
nutrient
assessment
in
metabolism.
Gross
via
15N
tracing
through
vector
threshold
element
ratio
(Vector-TER)
model
were
quantified
evaluate
response
changes.
We
used
tropical
samples
from
natural
forest
ecosystem
three
managed
ecosystems
(paddy,
rubber,
eucalyptus
sites).
Soil
extracellular
enzyme
activities
significantly
lower
than
forest.
The
Vector-TER
results
indicated
carbon
(C)
limitations
soil,
increased
limitation.
was
positively
related
mineralization
(GNM)
nitrification
(GN)
rates.
decrease
biomass
C
as
well
hydrolyzable
ammonium
led
N-acquiring
enzymes,
inhibiting
GNM
GN
rates
ultimately
increasing
also
correlated
with
leucine
aminopeptidase
β-N-acetylglucosaminidase.
highlight
that
converting
forests
can
increase
reducing
production.
Frontiers in Microbiology,
Journal Year:
2023,
Volume and Issue:
14
Published: May 25, 2023
Introduction
The
continuous
application
of
cow
manure
in
soil
for
many
years
leads
to
the
accumulation
heavy
metals,
pathogenic
microorganisms,
and
antibiotic
resistance
genes.
Therefore,
recent
years,
has
often
been
mixed
with
botanical
oil
meal
as
organic
fertilizer
applied
farmland
improve
crop
quality.
However,
effects
various
fertilizers
on
microbial
composition,
community
structure,
function,
tobacco
yield,
quality
remain
unclear.
Methods
we
prepared
via
solid
fermentation
by
mixing
different
meals
(soybean
meal,
rape
peanut
bran,
sesame
meal).
Then,
studied
its
structure
physicochemical
properties,
enzyme
activities,
yield
quality;
then
analyzed
correlations
between
these
factors.
Results
discussion
Compared
alone,
four
kinds
improved
flue-cured
degrees.
Peanut
which
significantly
available
phosphorus,
potassium,
NO
3
–
-N,
was
best
addition.
fungal
diversity
decreased
when
or
bran
combined
manure,
while
bacterial
abundance
increased
added
compared
soybean
bran.
addition
enriched
subgroup_7
Spingomonas
bacteria
Chaetomium
Penicillium
fungi
soil.
relative
abundances
functional
genes
xenobiotics
biodegradation
metabolism,
endophytic
fungi,
wood
saprotroph
groups
increased.
In
addition,
alkaline
phosphatase
had
greatest
effect
-N
least
microorganisms.
conclusion,
phosphorus
potassium
contents
soil;
beneficial
microorganisms;
promoted
metabolic
function
tobacco;
microecology.
Microorganisms,
Journal Year:
2024,
Volume and Issue:
12(6), P. 1108 - 1108
Published: May 30, 2024
With
mounting
demand
for
high-quality
agricultural
products
and
the
relentless
exploitation
of
arable
land
resources,
finding
sustainable
ways
to
safely
cultivate
food
crops
is
becoming
ever
more
important.
Here,
we
investigated
effects
integrated
cropping
technique
“straw
return
+
intercropping”
on
soil
aggregates
as
well
microbial
biomass
carbon
(MBC)
content,
enzyme
activities
diversity
in
soils
maize
soybean
crops.
Our
results
show
that
comparison
straw
removal
monoculture,
intercropping
increase
rhizosphere’s
MBC
content
(59.10%)
soil,
along
with
urease
(47.82%),
sucrase
(57.14%),
catalase
(16.14%)
acid
phosphatase
(40.66%)
under
soybean.
Under
same
treatment,
yield
when
intercropped
surpassed
grown
equivalent
ratio
treatment
being
highest.
Overall,
beneficial
healthy
development
agriculture
black
region
northeast
China,
especially
combined
fields.
Forests,
Journal Year:
2025,
Volume and Issue:
16(2), P. 344 - 344
Published: Feb. 14, 2025
Wildfires
are
significant
disturbances
that
reshape
soil
ecosystems,
impacting
properties,
microbial
communities,
and
enzyme
activities.
In
Pinus
tabulaeformis
forests
in
northern
China,
the
effects
of
wildfire
on
health,
particularly
Actinobacteriota
enzymatic
functions,
remain
poorly
understood.
This
study
investigates
both
direct
indirect
fire
severity
these
factors
examines
how
fire-induced
changes
properties
mediate
responses.
Our
findings
show
significantly
alters
chemical
including
an
increase
pH
a
reduction
organic
carbon
water
content,
under
high
severities.
These
directly
impact
with
showing
resilience
light
moderate
intensities
but
declining
severity,
especially
subsoil
layers.
Soil
enzymes,
such
as
urease
protease,
played
crucial
role
mitigating
negative
impacts
nutrient
cycling.
Their
activity
promoted
availability,
aiding
ecosystem
recovery,
even
intensity
reduced
overall
fertility.
Structural
Equation
Modeling
(SEM)
further
revealed
relationships
between
Actinobacteriota,
shaped
by
thermal
complex
interactions
mediated
moisture
levels.
underscores
importance
considering
mutual
activities
post-fire
recovery.
The
highlight
while
high-severity
fires
disrupt
health
dynamics,
enzymes
can
help
regulate
enhancing
cycling
supporting
stability.
insights
contribute
to
better
understanding
wildfire-induced
degradation
provide
actionable
strategies
for
restoration
management
fire-prone
ecosystems.
Soil Science Society of America Journal,
Journal Year:
2025,
Volume and Issue:
89(2)
Published: March 1, 2025
Abstract
In
different
land
types
near
coal
mining
areas,
the
migration
and
speciation
of
heavy
metals
may
have
characteristics,
impact
on
ecological
environment
human
health
is
also
different.
order
to
further
explore
this
difference,
total
amount
six
(Cd,
As,
Cu,
Zn,
Pb,
Ni)
in
soil
samples
from
agricultural
land,
forest
wasteland,
mine
were
analyzed.
The
results
indicated
that
(1)
Cd,
Pb
are
higher
than
background
values
Guizhou
Province,
content
area
other
use
types.
(2)
Heavy
Ni,
Zn
exist
mainly
residual
state,
while
non‐residual
state.
(3)
bioavailability
test
indicate
Cd
had
highest
certain
risks
body.
potential
risk
assessment
suggested
was
at
medium
risk,
low
risk.
(4)
based
noncarcinogenic
study
less
1,
with
low‐risk
level
carcinogenic
However,
within
acceptable
range,
corrected
by
evaluation
metals.
cannot
be
completely
absorbed
body,
so
it
more
meaningful
for
assessment.
