Water,
Год журнала:
2021,
Номер
13(15), С. 2052 - 2052
Опубликована: Июль 28, 2021
The
North
China
Plain
is
an
important
irrigated
agricultural
area
in
China.
However,
the
effects
of
irrigation
management
on
carbon
emission
are
not
well
documented
this
region.
Due
to
uneven
seasonal
distribution
rainfall,
mainly
concentrated
winter
wheat
growing
season
Plain.
In
study,
we
estimated
CO2
and
soil
CH4
uptake
from
fields
with
different
methods
scheduling
treatments
using
static
chamber-gas
chromatography
method
April
May
2017
2018.
Treatments
included
three
(surface
drip,
sprinkler,
border)
levels
that
initiated
as
soon
moisture
drained
50%,
60%,
70%
field
capacity
for
a
0–100
cm
profile
were
tested.
results
showed
both
significantly
influenced
(p
<
0.05)
cumulative
emission,
grain
yield,
global
warming
potential
(GWP),
GWP
Intensity
(GWPI),
GWPI
per
unit
applied,
water
use
efficiency
(WUE).
Compared
60%
FC,
50%
FC
de-creased
accumulated
26.8–30.3%
17.8–25.4%,
reduced
emissions
7.0–15.3%
12.6–19.4%,
respectively.
Conversely,
6.5–13.3%
12.5–19.4%
lower
yield
10.4–19.7%
8.5–16.6%
compared
2018,
sprinkler
border
irrigation,
drip
at
increased
11.3–12.1%
1.9–5.5%,
while
7.5–8.8%
10.1–12.1%
Moreover,
5.2–7.5%
6.3–6.8%,
WUE
0.9–5.4%
5.7–7.4%,
lowered
8.0–9.8%
10.1–12.0%
interaction
impacted
uptake,
amount,
2018
only
entire
study.
Overall,
optimal
choice
terms
higher
WUE,
mitigating
Global Change Biology,
Год журнала:
2016,
Номер
23(2), С. 512 - 533
Опубликована: Июль 22, 2016
In
the
light
of
daunting
global
sustainability
challenges
such
as
climate
change,
biodiversity
loss
and
food
security,
improving
our
understanding
complex
dynamics
Earth
system
is
crucial.
However,
large
knowledge
gaps
related
to
effects
land
management
persist,
in
particular
those
human-induced
changes
terrestrial
ecosystems
that
do
not
result
land-cover
conversions.
Here,
we
review
current
state
ten
common
activities
for
their
biogeochemical
biophysical
impacts,
level
process
data
availability.
Our
shows
ca.
one-tenth
ice-free
surface
under
intense
human
management,
half
medium
one-fifth
extensive
management.
Based
on
review,
cluster
these
into
three
groups:
(i)
which
sets
are
available,
a
good
base
exists
(cropland
harvest
irrigation);
(ii)
sufficient
but
robust
lacking
(forest
harvest,
tree
species
selection,
grazing
mowing
N
fertilization);
(iii)
practices
with
severe
concomitant
an
unsatisfactory
(crop
artificial
wetland
drainage,
tillage
fire
crop
residue
element
harvest).
Although
identify
multiple
impediments
progress,
conclude
status
availability
advance
incorporating
in,
example,
or
dynamic
vegetation
models
order
provide
systematic
assessment
role
system.
This
contributes
strategic
prioritization
research
efforts
across
disciplines,
including
research,
ecological
modelling.
Abstract
Quantifying
nitrous
oxide
(N
2
O)
fluxes,
a
potent
greenhouse
gas,
from
soils
is
necessary
to
improve
our
knowledge
of
terrestrial
N
O
losses.
Developing
universal
sampling
frequencies
for
calculating
annual
fluxes
difficult,
as
are
renowned
their
high
temporal
variability.
We
demonstrate
daily
was
largely
required
achieve
within
10%
the
‘best’
estimate
28
datasets
collected
three
continents—Australia,
Europe
and
Asia.
Decreasing
regularity
measurements
either
under-
or
overestimated
with
maximum
overestimation
935%.
Measurement
frequency
lowered
using
strategy
based
on
environmental
factors
known
affect
variability,
but
still
more
than
once
week.
Consequently,
uncertainty
in
current
global
budgets
associated
upscaling
field-based
can
be
decreased
significantly
adequate
frequencies.
Agricultural Water Management,
Год журнала:
2023,
Номер
290, С. 108599 - 108599
Опубликована: Ноя. 21, 2023
Climate
change
caused
by
increasing
greenhouse
gas
(GHG)
emissions
has
led
to
frequent
extreme
weather
events,
which
seriously
threaten
sustainable
agricultural
production.
Therefore,
it
is
essential
optimize
proper
irrigation
management
improve
the
grain
yield,
crop
water
productivity
(WPc),
economic
(EWPc),
and
lower
global
warming
potential
(GWP)
GWP
Intensity
(GWPI).
The
effect
of
scheduling
methods
on
GHG
remains
largely
unknown,
even
though
this
knowledge
management.
To
address
gap,
a
field
experiment
was
carried
out
in
North
China
Plain
(NCP)
for
three
winter
wheat
seasons
measure
influence
different
WPc,
EWPc,
GWP,
GWPI.
Irrigation
including
50%,
60%,
70%
capacity
(FC)
were
kept
main
plots
methods,
sprinkler,
drip,
flood
sub-plots.
results
revealed
that
relative
sprinkler
at
60%
FC,
drip
FC
significantly
(p
<
0.05)
improved
yield
4.89–7.52%,
WPc
1.0–5.4%,
EWPc
1.1–5.49%,
7.47–9.34%,
GWPI
10.92–15.23%.
Compared
with
increased
5.34–6.81%,
5.65–15.1%,
5.73–15.12%,
10.36–15.16%,
16.22–19.40%.
Technique
order
preference
similarity
an
ideal
solution
(TOPSIS)
presented
compared
scheduling,
provides
best
optimal
balance
combined
suggested
sustained
mitigated
NCP.
