Environmental Pollutants and Bioavailability,
Journal Year:
2023,
Volume and Issue:
35(1)
Published: Oct. 20, 2023
This
study
aimed
to
investigate
the
effects
of
fresh
water
and
seawater
flooding
on
phosphorous
(P)
nitrogen
(N)
dynamics
in
two
calcareous
soils
(Biscayne
Krome)
South
Florida
using
a
28-day
greenhouse
experiment.
Porewater
samples
were
collected
at
three
depths
over
four
periods
(1,
7,
14,
28
days)
analyzed
for
selected
quality
parameters.
Results
showed
that
seawater-flooded
Biscayne
soil
had
4.4
fold
higher
porewater
soluble
reactive
phosphorus
(SRP)
concentration
than
freshwater.
Additionally,
SRP
total
(TP)
increased
with
prolonged
duration
column
depth.
Furthermore,
both
freshwater
NH4+
-
N
concentration;
however,
increase
was
more
pronounced
flooded
samples.
also
duration.
Overall,
highlights
risks
nutrient
leaching
from
coastal
could
contribute
deterioration
surface
groundwater
quality.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(45), P. 17353 - 17362
Published: Nov. 2, 2023
Bioreduction
of
nitrate
to
value-added
ammonium
is
a
potentially
sustainable
strategy
recycle
nutrients
from
wastewater.
Here,
we
have
proven
the
feasibility
reduction
autotrophic
with
electrons
extracted
Fe(0).
Using
Geobacter-dominated
anodic
biofilm
as
an
inoculum,
achieved
nitrate-to-ammonium
efficiency
up
90
±
3%
rate
35
1.3
mg
N/d/L.
An
electron
acceptor
instead
inoculum
greatly
influenced
Fe(0)-dissimilatory
(DNRA),
where
nitrite
provided
effective
selective
pressure
enrich
Geobacter
initial
5
56%.
The
DNRA
repressing
denitrification
was
demonstrated
by
reverse
tendencies
upregulated
nrfA
and
downregulated
nirS
gene
transcription.
This
finding
provides
new
route
for
removal
recycling
water,
which
has
broader
implication
on
biogeochemical
nitrogen
iron
cycling.
Plant Cell & Environment,
Journal Year:
2024,
Volume and Issue:
47(7), P. 2612 - 2628
Published: May 7, 2024
The
dynamics
of
the
physiological
adaptability
plants
and
rhizosphere
soil
environment
after
waterlogging
remain
unclear.
Here
we
investigated
mechanisms
regulating
plant
condition
shaping
microbiome
in
a
pot
experiment.
In
experiment,
added
melatonin
to
waterlogged
plants,
which
promoted
relief.
treatment
significantly
enhanced
photosynthesis
antioxidant
capacity
apple
nitrogen
(N)
utilization
efficiency
by
upregulating
genes
related
N
transport
metabolism.
Multiperiod
analysis
showed
dynamic
effects
on
diversity
microbial
community
during
recovery.
Random
forest
linear
regression
analyses
were
used
screen
for
potential
beneficial
bacteria
(e.g.,
Azoarcus,
Pseudomonas
Nocardioides)
specifically
regulated
revealed
positive
correlation
with
nutrient
levels
growth.
Furthermore,
metagenomic
regulatory
involved
cycling
soil.
Melatonin
positively
contributed
accumulation
dry
weight
expression
nifD
nifK
(N
fixation).
summary,
regulates
functions
structure
function
community;
it
recovery
stress.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Dec. 12, 2023
Abstract
Nitrate
ammonification
is
important
for
soil
nitrogen
retention.
However,
the
ecology
of
ammonifiers
and
their
prevalence
compared
with
denitrifiers,
being
competitors
nitrate,
are
overlooked.
Here,
we
screen
1
million
genomes
nrfA
onr
,
encoding
ammonifier
nitrite
reductases.
About
40%
assemblies
carry
at
least
one
denitrification
gene
show
higher
potential
nitrous
oxide
production
than
consumption.
We
then
use
a
phylogeny-based
approach
to
recruit
fragments
nrfA,
reductase
genes
(
nirK
nirS
)
in
1861
global
terrestrial
metagenomes.
outnumbers
nearly
negligible
counts
all
biomes,
but
dominate,
except
tundra.
Random
forest
modelling
teases
apart
influence
C/N
on
-ammonifier
vs
denitrifier
abundance,
showing
an
effect
nitrate
rather
carbon
content.
This
study
demonstrates
multiple
roles
play
cycling
identifies
factors
ultimately
controlling
fate
nitrate.
Frontiers in Plant Science,
Journal Year:
2025,
Volume and Issue:
16
Published: Feb. 7, 2025
Lime
and
biochar
are
widely
utilized
to
enhance
nitrogen
utilization
in
crops
grown
on
acidic
soils,
though
each
has
its
own
set
of
limitations.
Understanding
their
combined
effects
is
crucial
for
optimizing
soil
remediation
strategies.
This
study
investigates
the
impact
lime
efficiency
(NUE)
a
tobacco
monoculture
system,
which
been
practiced
20
years
acidified
soils
Fuzhou,
southeastern
China,
over
period
from
2021
2022.
Four
treatments
were
applied:
control
(CK),
alone
(L),
(B),
lime-biochar
combination
(L+B).
The
results
indicated
that
all
significantly
improved
NUE,
with
increases
ranging
20.07%
27.17%
compared
CK.
Biochar
(B)
was
more
effective
than
treatment
(L+B)
showed
comparable
alone.
Correlation
analysis
revealed
pH
exchangeable
base
cations
facilitated
transformation,
thereby
enhancing
NUE.
(L,
L+B)
promoted
nitrification
potential
rhizosphere
soil,
whereas
application
(B,
resulted
elevated
nitrate
content.
Microbial
functional
enhanced
nitrification,
while
fostered
dissimilatory
reduction,
improving
retention.
Pearson
correlation
demonstrated
strong
positive
relationship
between
reduction
both
alkali-hydrolyzable
contents.
These
findings
suggest
enhances
promotes
retention,
together
increasing
availability.
integrates
these
benefits,
yielding
offers
valuable
insights
into
synergistic
use
mitigating
acidification
management
agricultural
systems.
