Authorea (Authorea),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Dec. 22, 2022
Denitrification
is
a
key
process
in
the
global
nitrogen
(N)
cycle,
causing
both
nitrous
oxide
(N2O)
and
dinitrogen
(N2)
emissions.
However,
estimates
of
seasonal
denitrification
losses
(N2O+N2)
are
scarce,
reflecting
methodological
difficulties
measuring
soil-borne
N2
emissions
against
high
atmospheric
background
challenges
regarding
their
spatio-temporal
upscaling.
This
study
investigated
N2O+N2
response
to
N
fertiliser
rates
(0,
100,
150,
200
250
kg
ha-1)
on
two
intensively
managed
tropical
sugarcane
farms
Australia,
by
combining
automated
N2O
monitoring,
in-situ
measurements
using
15N
gas
flux
method
recoveries
at
harvest.
Dynamic
changes
N2O/(N2O+N2)
ratio
(<
0.01
0.768)
were
explained
fitting
generalised
additive
mixed
models
(GAMMs)
with
soil
factors
upscale
temporal-resolution
data
daily
over
season.
Cumulative
ranged
from
12
87
ha-1,
increasing
non-linearly
rates.
Emissions
accounted
for
31–78%
dominated
environmentally
benign
The
contribution
loss
decreased
rates,
suggesting
significance
other
pathways
including
leaching
runoff
higher
delivers
blueprint
approach
extrapolate
temporal
spatial
scales,
which
can
be
applied
fertilised
agroecosystems.
Robust
determined
this
will
help
improve
cropping
system
modelling
approaches,
advancing
our
understanding
cycle
across
scales.
International Journal of Molecular Sciences,
Journal Year:
2022,
Volume and Issue:
23(19), P. 11522 - 11522
Published: Sept. 29, 2022
Oxygen
(O2)
is
the
most
crucial
substrate
for
numerous
biochemical
processes
in
plants.
Its
deprivation
a
critical
factor
that
affects
plant
growth
and
may
lead
to
death
if
it
lasts
long
time.
However,
various
biotic
abiotic
factors
cause
O2
deprivation,
leading
hypoxia
anoxia
tissues.
To
survive
under
and/or
anoxia,
plants
deploy
mechanisms
such
as
fermentation
paths,
reactive
oxygen
species
(ROS),
nitrogen
(RNS),
antioxidant
enzymes,
aerenchyma,
adventitious
root
formation,
while
nitrate
(NO3−),
nitrite
(NO2−),
nitric
oxide
(NO)
have
shown
beneficial
roles
through
modulating
these
mechanisms.
Therefore,
this
review,
we
highlight
role
of
reductive
pathways
NO
formation
which
lessen
deleterious
effects
oxidative
damages
increase
adaptation
capacity
during
anoxia.
Meanwhile,
overproduction
leads
cellular
dysfunction
cell
death.
Thus,
its
scavenging
or
inhibition
equally
important
survival.
As
are
also
reported
produce
potent
greenhouse
gas
nitrous
(N2O)
when
supplied
with
NO3−
NO2−,
resembling
bacterial
denitrification,
tolerance
discussed
here.
We
point
out
reduction
N2O
along
phytoglobin-NO
cycle
could
be
NO-scavenging
mechanism
would
reduce
nitro-oxidative
stress,
thus
enhancing
plants’
survival
O2-limited
conditions.
Hence,
understanding
molecular
involved
reducing
toxicity
not
only
provide
insight
into
physiology,
but
address
uncertainties
seen
global
budget.
European Journal of Soil Science,
Journal Year:
2025,
Volume and Issue:
76(2)
Published: March 1, 2025
ABSTRACT
Riparian
ecosystems,
through
their
anoxic
properties
driven
by
floods,
play
a
crucial
role
in
favouring
denitrification.
The
absence
of
nitrous
oxide
(N
2
O)
reductase
activity
the
denitrification
process
provokes
emission
potent
greenhouse
gas
(GHG),
N
O,
into
atmosphere.
Our
understanding
contribution
to
O
emissions
is
limited
difficulties
capturing
peak
events
and
measuring
dinitrogen
),
final
product
under
soil
flooding.
In
this
study,
we
describe
GHG‐Aquacosme,
new
laboratory‐based
ecosystem‐relevant
approach
simulate
flood
conditions
investigate
GHG
flux
dynamics
intact
riparian
cores,
focusing
on
O.
system
capabilities
were
tested
two
different
soils
with
simultaneous
monitoring
carbon
dioxide
porewater
chemistry.
We
also
used
simple
mass
balance
estimate
emissions.
GHG‐Aquacosme
proved
efficient
incubation
samples
atmospheric
conditions,
preserving
initial
structure
heterogeneity
providing
high
temporal
resolution
upon
This
translated
heterogeneous
outputs
terms
denitrification‐related
parameters
such
as
yield
nitrate
removal
efficiency.
Finally,
accounting
for
nitrogen
(N)
species
diffusion
within
recommended,
setup
can
easily
accommodate
isotopic
tracer
methodologies
other
cycle
pathways.
Further
research
encouraged
determine
how
results
from
application
be
utilised
predictive
models
emissions,
particularly
relation
future
scenarios
projections
Plants,
Journal Year:
2024,
Volume and Issue:
13(13), P. 1830 - 1830
Published: July 3, 2024
In
order
to
clarify
the
effect
of
different
fertilizers
on
foxtail
millet
quality
under
low
nitrogen
conditions,
we
used
JGNo.21
and
LZGNo.2
as
experimental
materials
set
up
five
treatments,
including
non-fertilization,
nitrogen,
phosphorus,
compound,
organic
fertilizers,
study
regulation
fertilizer
types
agronomic
traits,
nutrient
fractions,
pasting
characteristics
conditions.
Compared
with
control,
all
improved
traits
a
certain
extent.
Nitrogen
compound
treatments
reduced
starch
content
JGNo.21;
was
by
0.55%
0.07%
treatments.
Phosphorus
increased
content,
0.50%
0.56%
phosphorus
The
each
treatment
protein
completely
opposite
that
starch;
fat
fiber
content.
Among
them,
yellow
pigment
content;
1.21%
2.64%
Organic
pigment;
3.36%
2.79%
LZGNo.2;
2.62%
1.98%
treatment.
Compound
decreased
2.16%
2.90%
Different
cellulose
LZGNo.2.
essential,
non-essential,
total
amino
acids
significantly
higher
compared
control
values
peak
viscosity,
trough
breakdown
final
setback
time
index
index.
contrast,
viscosity
Reasonable
fertilization
can
improve
millet,
which
provides
scientific
theoretical
basis
for
improving
millet.
Soil Biology and Biochemistry,
Journal Year:
2024,
Volume and Issue:
194, P. 109421 - 109421
Published: April 2, 2024
Denitrification
is
the
least
studied
process
of
global
N
cycle
mainly
due
to
sensitivity
required
discriminate
small
fluxes
soil
emitted
N2
against
high
atmospheric
background.
We
aimed
enhance
15N
Gas
Flux
method
measure
in
situ
denitrification
rates
by
optimising
quantity
15N–NO3
tracer
applied
and
using
an
artificial
atmosphere
(containing
5
%
N2,
20
O2,
75
He
0.11
ppm
N2O)
during
field
incubation.
first
conducted
a
dose-response
laboratory
study
assess
stimulation
effect
nitrate
addition.
Subsequently,
we
developed
two
novel
approaches
rates,
either
modified
static
chambers
or
intact
cores
inside
plastic
liners;
where
both
cases
entire
headspace
was
replaced
prior
Furthermore,
compared
models
calculations
(the
"Mulvaney
&
Boast"
"Arah"
models)
as
well
calculated
enrichment
denitrifying
pool
based
on
N2O
isotopologue
distribution
data.
The
results
showed
that
doubling
amount
ambient
did
not
lead
significant
activity
our
case.
However,
excessive
amendment
(e.g.
times
levels)
increased
product
ratio
stimulating
nitrous
oxide
emission.
Our
techniques
were
successful
measuring
however,
liner
preferred
higher
success
rate
flux
detection
(up
90
%),
throughput
24
at
time)
improved
spatial
resolution.
Under
high-resolution
instruments,
limit
160
ppb,
which
5-fold
better
than
original
method.
Mulvaney
Boast
model
performed
Arah
one
consistently
yielded
(17
maximum),
especially
for
low
enrichments
short
with
data
differed
statistically,
but
magnitude
difference
(4.6
maximum).
Measuring
imperative
quantify
realistic
presented
here
inexpensive,
reproducible
candidate.
For
sensitivity,
recommend
emissions
resulting
combination
29N2
(only)
determine
emissions.
