Effects of Afforestation on Soil Aggregate Stability, Carbon, and Nitrogen in Alpine Sandy Lands
Wei He,
Hongyu Qian,
Haodong Jiang
и другие.
Forests,
Год журнала:
2025,
Номер
16(5), С. 782 - 782
Опубликована: Май 6, 2025
Soil
aggregate
stability
and
carbon–nitrogen
content
are
critical
indicators
for
assessing
the
vegetation
restoration
effects.
Salix
cupularis
plays
a
vital
role
in
rehabilitating
desertified
alpine
meadows
on
eastern
Qinghai–Tibet
Plateau.
However,
research
remains
limited
about
how
afforestation
influences
soil
associated
carbon
nitrogen
dynamics.
In
this
study,
sandy
land
(0
years)
served
as
control,
spatial
time
replacement
method
was
used
to
examine
changes
water-stable
composition,
stability,
organic
(OC)
total
(TN)
contents,
density
at
0–60
cm
depth
after
5
10
years
of
(Salix
cupularis).
Ecological
significantly
enhanced
proportion
macroaggregates
(>0.25
mm)
topsoil
(0–20
cm),
improved
stability.
After
restoration,
increased
by
45.04%
51.32%,
respectively.
The
average
weight
diameter
geometric
mean
aggregates
51.32%
59.53%,
Following
there
gradual
increase
OC
TN
contents
soil,
with
highest
observed
0–10
layer
(266.67%
391.67%).
also
displayed
similar
trend.
Correlation
analysis
results
indicated
significant
positive
relationship
between
density,
various
diameters,
these
aggregates.
Pearson’s
correlation
coefficient
>
1
mm
highest.
Compared
years,
recovery
were
more
conducive
formation
macroaggregates,
enhancement
accumulation
TN.
Therefore,
Zoige
Plateau
can
enhance
composition
thereby
enhancing
ecological
quality.
This
study
provides
fundamental
data
theoretical
support
grasslands
Язык: Английский
Effects of Strip Clearcutting and Replanting on the Soil Aggregate Composition and Stability in Cunninghamia lanceolata Plantations in Subtropical China
Forests,
Год журнала:
2025,
Номер
16(6), С. 873 - 873
Опубликована: Май 22, 2025
Strip
clearcutting
and
replanting
are
important
methods
for
optimizing
the
structure
of
low-efficiency
plantations,
but
their
effects
on
soil
aggregate
properties
remain
unclear,
especially
in
subtropical
China,
which
experiences
high
levels
rainfall
erosion
risk.
This
study
investigated
changes
composition
stability
through
strip
treatments
Cunninghamia
lanceolata
plantations.
The
experimental
included
strips
with
widths
10
m,
20
30
m
evergreen
broadleaf
Schima
superba
(SM10,
SM20,
SM30)
deciduous
Liquidambar
formosana
(SF10,
SF20,
SF30),
respectively.
reserve
belts
were
set
at
15
(S15),
(S30),
45
(S45),
no
as
control
(NT).
results
indicated
that
soils
treatment
plots
dominated
by
>5
mm
aggregates
(57%–77%),
however,
lower
than
(NT)
due
to
replanting,
except
SF20
S15
belts.
width
(SF20)
demonstrated
optimal
structural
stability,
significantly
erodibility
K
values
control.
content
was
positively
correlated
mean
weight
diameter
(MWD)
geometric
(GMD)
negatively
factor
(K).
In
contrast,
contents
other
particle
sizes
MWD
GMD
demonstrates
optimally
maintains
reduces
risk,
providing
critical
evidence
configuration
species
selection
ecological
restoration
Язык: Английский