Judging
the
carbon
emissions
of
various
agricultural
inputs
in
crop
planting
and
clarifying
decoupling
level
between
grain
production
from
can
provide
data
support
policy
references
for
emission
reduction.
Considering
six
sources
(plowing,
irrigation,
fertilizer,
pesticide,
film
(agrifilm),
diesel
fuel
(diefuel)).
This
study
calculated
31
provinces
(municipalities
autonomous
regions)
China
2000
to
2021.
The
Tapio
index
was
used
explore
relationship
different
types
inputs.
regulating
effects
scale,
technological
progress,
their
covariates
on
reduction
were
explored
using
two-way
fixed-effect
regression.
results
showed
that
growth
rate
had
a
fluctuating
downward
trend
2021,
it
weakly
decoupled
most
years,
an
overall
strong
achieved
A
1%
increase
scale
leads
1.0%,
0.68%,
0.31%
increases
plowing,
diefuel,
respectively.
synergistic
effect
progress
significantly
reduce
planting,
thus
promote
planting.
provides
valuable
formulation
economies
synergy
targets
greater
extent.
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(2)
Published: Feb. 1, 2024
Abstract
Maintaining
or
even
increasing
crop
yields
while
reducing
nitrous
oxide
(N
2
O)
emissions
is
necessary
to
reconcile
food
security
and
climate
change,
the
metric
of
yield‐scaled
N
O
emission
(i.e.,
per
unit
yield)
at
present
poorly
understood.
Here
we
conducted
a
global
meta‐analysis
with
more
than
6000
observations
explore
variation
patterns
controlling
factors
for
maize,
wheat
rice
associated
potential
mitigation
options.
Our
results
showed
that
average
across
all
available
data
followed
order
(322
g
Mg
−1
,
95%
confidence
interval
[CI]:
301–346)
>
maize
(211
CI:
198–225)
(153
144–163).
Yield‐scaled
individual
crops
were
generally
higher
in
tropical
subtropical
zones
temperate
zones,
also
trend
towards
lower
intensities
from
low
high
latitudes.
This
was
better
explained
by
climatic
edaphic
fertilizer
management,
their
combined
effect
predicted
70%
variance.
Furthermore,
our
analysis
significant
decrease
use
efficiency
production
systems
cereal
>10
ha
(maize),
6.6
(wheat)
6.8
(rice),
respectively.
highlights
indicators
can
be
used
as
valuable
proxies
reconciling
trade‐offs
between
mitigation.
For
three
major
staple
crops,
fertilization
up
30%,
optimizing
timing
placement
application
using
enhanced‐efficiency
fertilizers
significantly
reduced
similar
yields.
data‐driven
assessment
provides
some
key
guidance
developing
effective
targeted
adaptation
strategies
sustainable
intensification
production.
