Agricultural Water Management,
Journal Year:
2023,
Volume and Issue:
279, P. 108206 - 108206
Published: Feb. 2, 2023
Agroforestry
has
been
widely
used
for
the
ecological
restoration
construction
of
semi-arid
regions
Chinese
Loess
Plateau.
Investigating
plant
water
sources
is
crucial
understanding
key
ecohydrological
processes
root
uptake
and
relations
between
coexisting
plants.
Clarifying
use
strategies
can
help
to
assess
sustainability
vegetation
in
agroforestry
systems
provide
references
management.
Thus,
we
investigated
characteristics
plants
an
system
consisting
Platycladus
orientalis,
Prunus
davidiana
Medicago
sativa.
The
δD
δ18O
stem
soil
0–300
cm
layer
were
measured.
MixSIAR
model
proportional
similarity
(PS)
quantify
proportion
absorbed
by
each
hydrological
niche
overlap
results
showed
that
combined
effects
rainfall
recharge
evapotranspiration
(ET)
loss
resulted
a
decrease
content
(SWC)
with
increasing
depth,
SWC
deep
(80–300
cm)
had
minor
variability
(6.1–7.1%)
throughout
study
period.
During
period,
due
desiccation,
P.
M.
sativa
mainly
utilized
from
shallow
(0–80
layers,
contribution
rate
65.4
±
8.3%,
64.9
7.7%
73.0
0.2%,
respectively.
three
relied
on
unstable
(recharged
rainfall)
while
was
consistently
low.
This
implies
less
resistant
drought
stress,
thus
posing
threat
stability
system.
Moreover,
even
July
September
high
agroforestry,
partitioning
among
did
not
increase
increased
ET
loss.
strong
competition
use,
as
indicated
values
(0.69–0.97)
PS.
Overall,
low
ecosystem
stability.
Density
reduction
or
selection
suitable
species
required
achieve
sustainable
restoration.
Hydrology and earth system sciences,
Journal Year:
2023,
Volume and Issue:
27(1), P. 123 - 137
Published: Jan. 4, 2023
Abstract.
Stable
water
isotopes
have
been
used
extensively
to
study
the
use
strategy
of
plants
in
various
ecosystems.
In
deep
vadose
zone
(DVZ)
regions,
rooting
depth
trees
can
reach
several
meters
tens
meters.
However,
existence
roots
soils
does
not
necessarily
mean
occurrence
root
uptake,
which
usually
occurs
at
a
particular
time
during
growing
season.
Therefore,
quantifying
contribution
deep-layer
soil
(DLSW)
DVZ
regions
using
natural
abundance
stable
may
be
accurate
because
this
method
assumes
that
always
extract
shallow-
and
water.
We
propose
multi-step
for
addressing
issue.
First,
isotopic
labeling
layers
identifies
whether
absorb
DLSW
determines
layer
depths
from
derive
their
source.
Next,
we
calculate
sources
based
on
determined
above
quantify
trees.
also
compared
results
with
method.
The
11-
17-year-old
apple
were
taken
as
examples
analyses
China's
Loess
Plateau.
Isotopic
showed
uptake
11-year-old
reached
300
cm
blossom
young
fruit
(BYF)
stage
only
100
swelling
(FSW)
stage,
whereas
consumed
0–320
layer.
Overall,
absorbed
most
(>140
cm)
BYF
more
these
than
throughout
addition,
overestimated
DLSW,
especially
320–500
Our
findings
highlight
determining
helps
regions.
Ecological Indicators,
Journal Year:
2023,
Volume and Issue:
154, P. 110594 - 110594
Published: July 1, 2023
Water
security
is
the
backbone
of
regional
development.
However,
it
generally
compromised
by
increasing
competition
for
water
resources
between
natural
and
social
systems,
especially
in
areas
with
limited
resources.
Sustainable
planning
requires
a
comprehensive
analysis
supply
demand
patterns,
which
difficult
owing
to
scale
mismatches
data
methodologies.
This
study
investigated
dynamics
interrelationships
semi-arid
watershed
Loess
Plateau,
China,
developing
system
model
that
simulates
during
1980–2020
future
changes
under
different
climate,
socioeconomic
development,
inter-basin
diversion
scenarios
2021–2050.
The
results
showed
(1)
end
2020,
level
gradually
approached
scarcity
threshold
indicated
deficit
index
surpassing
0;
(2)
unfavorable
climate
progressive
growth
conditions,
up
16
out
30
years
simulation
demonstrated
insecurity
form
net
quantity
deficit;
(3)
project
can
offset
such
deficits
short
term,
but
potentially
aggravates
risk
eliciting
more
rapid
pattern.
indicate
curbing
improving
water-saving
technology
are
instructive
resource
management.
For
Yanhe
Watershed,
pattern
should
be
improved
guarantee
on
full
temporal
scale.
We
suggest
moderate
rate
appropriate
this
region
efforts
solidify
use
redlines
advancement
technologies
essential
future.
provides
scientific
basis
long-term
evaluation
timescale
tightly
coupled
hydrological
components
modeling
framework
decision-makers
manage
sustainably.
