Journal of Environmental Quality,
Journal Year:
2016,
Volume and Issue:
45(6), P. 1812 - 1821
Published: Sept. 1, 2016
Improper
application
of
nitrogen
(N)
fertilizer
and
environmental
factors
can
cause
the
loss
nitrous
oxide
(NO)
to
environment.
Different
types
fertilizers
with
different
C/N
ratios
may
have
effects
on
The
focus
this
study
was
evaluate
four
organic
(feather
meal,
blood
fish
emulsion,
cyano-fertilizer)
applied
at
rates
(0,
28,
56,
112
kg
N
ha)
NO
emissions
track
CO
from
a
lettuce
field
(
L.).
conducted
in
2013
2014
compared
preplant-applied
solid
meal
meal)
multiple
applications
liquid
(fish
emulsion
cyano-fertilizer).
Three
days
week,
were
measured
twice
per
day
once
using
closed-static
chamber,
gas
samples
analyzed
by
chromatography.
Preplant-applied
significantly
increased
cumulative
as
control,
but
did
not.
Emission
for
ranged
0
0.1%
0.6
11%
fertilizers,
which
could
be
overestimated
due
chamber
placement
over
bands.
In
2014,
higher
(3.3-3.5)
resulted
than
(C/N
ratio,
0.9-1.5).
Therefore,
farmers
should
consider
use
means
reduce
soil
greenhouse
while
maintaining
high
yields.
Agriculture Ecosystems & Environment,
Journal Year:
2023,
Volume and Issue:
345, P. 108327 - 108327
Published: Jan. 3, 2023
Manure
treatment
such
as
anaerobic
digestion
and
solid-liquid
separation
has
shown
a
potential
to
abate
greenhouse
gas
(GHG)
emissions,
but
few
studies
have
considered
GHG
emissions
from
both
storage
field
application
regarding
crop
yield.
In
this
study,
four
different
organic
fertilizers
were
studied:
untreated
cattle
manure
(CA);
digestate
of
anaerobically
co-digested
with
grass-clover
(DD);
liquid
fraction
the
DD
(LF);
derived
biogas
desulfurization
biofilter
enriched
sulfur
ammonium
(NS).
The
CH4,
N2O
NH3
during
CA,
LF
between
August
November
2020
(11
weeks)
quantified.
Storage
continued
until
April
2021
when
these
materials,
well
NS
fertilizer
mineral
NKS
fertilizer,
applied
at
rate
100
kg
total
N
ha−1
spring
barley.
soil
content
monitored
growing
season.
Overall,
CH4
main
source
independent
treatments,
accounting
for
85
%,
40
%
11
(based
on
N)
treatments
LF,
respectively.
Anaerobic
significantly
reduced
due
diminished
degradable
matter
available
methanogens.
DD,
not
different.
Treatments
emitted
more
than
CA
storage,
presumably
because
higher
pH
content.
experiment,
dilute
solution
most
N2O,
while
comparable.
Yield-scaled
periods
44.4,
17.1,
8.5
24.3
CO2
eq
hkg−1
grain
yield,
or
without
thus
effective
strategies
mitigation
in
study.
Yields
nitrogen
use
efficiencies
processed
materials
those
observed
same
inorganic
hence
promising
strategies.
Agriculture Ecosystems & Environment,
Journal Year:
2018,
Volume and Issue:
265, P. 421 - 431
Published: July 7, 2018
Urea
fertilizer
applications
to
calcareous
soils
can
result
in
significant
nitrous
oxide
(N2O)
and
nitric
(NO)
emissions,
predominantly
via
nitrification
rather
than
denitrification.
To
address
this,
we
explored
several
mitigation
strategies
based
on
improved
urea
management
a
rainfed
winter
wheat
(Triticum
aestivum
L.)
crop
during
two
consecutive
cropping
seasons
with
contrasting
rainfall
quantities
distribution.
The
investigated
included
the
split
application
of
at
top
dressing,
use
inhibitors
(e.g.
2-(3,4-dimethyl-1H-pyrazol-1-yl)
succinic
acid
isomeric
mixture,
DMPSA,
nitrapyrin),
urease
inhibitor
N-butyl
thiophosphorictriamide
(NBPT),
or
double
DMPSA
+
NBPT.
Emissions
N2O,
NO,
methane
(CH4),
as
well
measurements
grain
straw
yield
bread-making
quality
(protein
content,
reserve
protein
composition:
glutenins
gliadins)
were
measured.
Nitrogen
(N)
efficiency
(NUE)
N
surplus
also
calculated.
Results
affected
by
rainfall,
since
first
season
experienced
typical
quantity
distribution,
whilst
second
was
very
dry,
thus
increasing
significantly
yield-scaled
emissions
surplus,
markedly
decreasing
NUE.
In
comparison
single
without
inhibitors,
all
treatments
generally
decreased
surface-scaled
urea+DMPSA
being
most
effective
consistent
option.
Split
NBPT
did
not
mitigate
dry
season,
because
marked
peaks
oxides
after
flowering,
caused
inefficient
uptake.
NBPT+DMPSA
led
best
balance
between
efficiency,
(i.e.
increments
total
protein,
gliadins
glutenins).
We
observe
any
effect
(except
season)
composition
gluten
proteins.
Our
results
suggest
that
should
be
recommended
semi-arid
crops.
Soil Biology and Biochemistry,
Journal Year:
2017,
Volume and Issue:
116, P. 193 - 202
Published: Oct. 24, 2017
Nitrification
inhibitors,
originally
proposed
for
nitrate
leaching
mitigation,
are
recommended
as
effective
nitrous
oxide
(N2O)
mitigation
strategies.
Several
compounds
have
been
trialled
and
used
in
the
past
including
dicyandiamide
(DCD)
or
3,4-dimethylpyrazole
phosphate
(DMPP).
Yet,
little
is
known
about
new
nitrification
inhibitor
2-(3,4-dimethyl-1H-pyrazol-1-yl)
succinic
acid
isomeric
mixture
(DMPSA).
A
field
experiment
using
15N
single-labelled
ammonium
(15NH4NO3
NH415NO3)
was
conducted
to
understand
effectiveness
of
DMPSA
on
a
biochemical
basis
an
irrigated
maize
(Zea
mays
L.)
crop.
Gaseous
fluxes,
i.e.
N2O,
15N2O,
15N2,
methane
(CH4),
carbon
dioxide
(CO2)
were
measured,
well
soil
mineral
N,
yield
components
recovery
plant
soil.
During
cropping
period,
use
significantly
reduced
cumulative
N2O
emissions
(118
g
N
ha−1)
compared
without
(231
ha−1).
The
analyses
revealed
that
most
losses
(particularly
during
emission
peak)
came
from
15NH4NO3
(i.e.
nitrification,
nitrifier
denitrification
and/or
coupled
denitrification)
rather
than
NH415NO3
this
calcareous
low
C-content
As
expected,
decreased
15NH4+
oxidation,
but
effect
non-target
microorganisms
noticed,
shown
by
significant
reduction
respiration
rates
coming
15NO3−.
No
CH4
oxidation
15N2
fluxes
observed.
did
not
lead
improvement
dry
weights
grain
biomass,
although
increment
root
biomass
64%
found.
This
compound
also
tended
increase
(average
67.8%)
decrease
18.3%)
differences
statistically
significant.
Conversely,
residual
fertilizer-N
15–30
cm
30–45
layers.
confirmed
highly
tool
reduce
crops
semi-arid
areas.
Journal of Environmental Quality,
Journal Year:
2020,
Volume and Issue:
49(5), P. 1186 - 1202
Published: Aug. 12, 2020
Nitrous
oxide
(N2
O)
is
a
potent
greenhouse
gas
that
primarily
emitted
from
agriculture.
Sampling
limitations
have
generally
resulted
in
discontinuous
N2
O
observations
over
the
course
of
any
given
year.
The
status
quo
for
interpolating
between
sampling
points
has
been
to
use
simple
linear
interpolation.
This
can
be
problematic
with
emissions,
since
they
are
highly
variable
and
bias
around
these
peak
emission
periods
dramatic
impacts
on
cumulative
emissions.
Here,
we
outline
five
gap-filling
practices:
interpolation,
generalized
additive
models
(GAMs),
autoregressive
integrated
moving
average
(ARIMA),
random
forest
(RF),
neural
networks
(NNs)
used
soil
To
facilitate
improved
methods,
describe
methods
then
provide
strengths
challenges
or
weaknesses
each
method
so
model
selection
improved.
We
protocol
details
data
organization
selection,
splitting
into
training
testing
datasets,
building
models,
reporting
results.
Use
advanced
within
standardized
likely
increase
transparency,
improve
estimates,
reduce
uncertainty,
capacity
quantify
impact
mitigation
practices.
Agriculture Ecosystems & Environment,
Journal Year:
2017,
Volume and Issue:
249, P. 57 - 69
Published: Aug. 24, 2017
Winter
oilseed
rape
(Brassica
napus
L.,
WOSR)
is
the
major
oil
crop
cultivated
in
Europe.
Rapeseed
predominantly
used
for
production
of
biodiesel.
The
framework
European
Renewable
Energy
Directive
requires
that
use
biofuels
achieves
GHG
savings
at
least
50%
compared
to
fossil
fuel
starting
2018.
However,
N2O
field
emissions
are
estimated
using
emission
factors
not
specific
and
associated
with
strong
uncertainty.
controlled
by
N
fertilization
dominate
balance
WOSR
cropping
due
high
global
warming
potential
N2O.
Thus,
experiments
were
conducted
increase
data
basis
subsequently
derive
a
new
WOSR-specific
factor.
yields
monitored
three
years
over
range
intensities
five
study
sites
representative
German
production.
fluxes
exhibited
typical
spatial
temporal
variability
dependence
on
soil
texture,
weather
nitrogen
availability.
annual
ranged
between
0.24
kg
5.48
N2O-N
ha−1
a−1.
increased
emissions,
particularly
highest
treatment
(240
ha−1).
Oil
yield
up
fertilizer
amount
120
ha−1,
higher
N-doses
grain
but
decreased
concentrations
seeds.
Consequently
remained
constant
fertilization.
Since,
yield-related
also
exponentially
surpluses,
there
reduction
rate,
which
offers
perspectives
mitigation
emissions.
Our
measurements
double
published
flux
WOSR.
Based
this
extended
dataset
we
modeled
relationship
input
an
exponential
model.
corresponding
factor
was
0.6%
applied
common
under
best
management
practice
(200
a−1).
This
substantially
lower
than
linear
IPCC
Tier
1
(EF1)
1.0%
other
models
have
been
proposed.