Revista Científica Dékamu Agropec,
Год журнала:
2024,
Номер
5(2), С. 74 - 86
Опубликована: Дек. 17, 2024
Este
estudio
analizó
la
variabilidad
espacial
de
fertilidad
del
suelo
en
una
parcela
1440
m²
Mosquera,
Colombia,
para
crear
zonas
manejo
homogéneas
agricultura
precisión.
Se
recolectaron
480
muestras
usando
cuadrícula
3x1
m,
analizando
pH,
conductividad
eléctrica,
fósforo,
cationes
intercambiables,
microelementos
y
materia
orgánica
(MOS).
El
análisis
componentes
principales
(PCA)
identificó
MOS,
el
pH
eléctrica
como
indicadores
clave
zonificación.
La
interpolación
Kriging
mapeó
estas
propiedades,
revelando
alta
variabilidad.
modelo
exponencial
se
ajustó
mejor
a
los
semivariogramas.
clustering
difuso,
basado
umbrales
indicadores,
dividió
dos
zonas,
con
superposición
entre
las
divisiones
basadas
MOS.
Un
QUEFTS
simuló
rendimiento
cultivos,
mostrando
que
fertilización
optimizada
N
K,
basada
zonificación,
maximizó
rendimientos.
demuestra
efectividad
uso
PCA
manejo.
zonificación
MOS
mejoró
P
mientras
enfocó
diferencias
micronutrientes.
Los
resultados
destacan
potencial
precisión
mejorar
rendimientos
cultivos
eficiencia
recursos.
Investigaciones
futuras
deberían
incorporar
propiedades
físicas
variaciones
climáticas
un
más
completo.
Forests,
Год журнала:
2025,
Номер
16(2), С. 298 - 298
Опубликована: Фев. 8, 2025
The
distribution
of
the
soil
aggregate
structure
and
its
associated
organic
carbon
along
elevation
gradient
remains
unclear,
but
it
may
be
crucial
for
stabilization
pools
in
mountainous
forests.
In
this
study,
we
first
assessed
changes
aggregate-associated
0–20
cm
layers
an
alpine
forest
Sygera
Mountains
(3000–4200
m).
We
then
conducted
incubation
experiment
to
explore
relationship
between
aggregates
mineralization,
using
Pearson
correlation
analysis
RDA.
results
indicated
that
macroaggregates
microaggregates
were
predominant
forms
Mountains,
contributing
significantly
(33.57%
38.29%,
respectively).
As
increased,
stability
mid
high
elevations
(3600–4200
m)
was
higher
than
low
(3000–3300
Aggregate
macroaggregate-associated
positively
correlated
with
total
carbon,
suggesting
is
essential
promoting
aggregation
soils.
With
rising
temperatures,
rate
mineralization
at
different
sites
Q10
values
greater
elevations.
This
implied
more
sensitive
climate
warming.
significant
negative
microaggregate-associated
suggested
contribute
pools.
Given
link
strengthened
increasing
role
should
emphasized
under
a
warming
trend.
Forests,
Год журнала:
2024,
Номер
15(12), С. 2167 - 2167
Опубликована: Дек. 9, 2024
The
topographies
of
soil
erosion
and
deposition
are
critical
factors
that
significantly
influence
quality,
subsequently
impacting
the
erodibility
soils
in
karst
regions.
However,
investigation
into
effects
on
across
different
stages
vegetation
succession
trough
valleys
is
still
at
a
preliminary
stage.
Therefore,
three
distinct
topographic
features
(dip
slopes,
anti-dip
valley
depressions)
were
selected
(dip/anti-dip
slope)
sites
(valley)
to
investigate
spatial
heterogeneity
physicochemical
properties,
infiltration
capacity,
aggregate
stability,
valleys.
Additionally,
five
forests
considered:
Abandoned
land
stage
(ALS),
Herb
(HS),
Herb-Shrub
(HES),
Shrub
(SHS),
Forest
(FS).
relationships
among
these
analyzed
identify
key
driving
influencing
erodibility.
results
revealed
properties
stability
site
superior
those
site.
FS
resulted
best
whereas
HS
highest
within
capacity
was
greater
than
sites.
ALS
had
strongest
both
(0.064)
(0.051),
with
observed
slopes
during
HES
(0.142).
structural
equation
model
reveals
topographies,
succession,
aggregates,
characteristics
collectively
account
for
88%
variation
under
conditions.
Specifically,
direct
indirect
influences
most
exerted
by
succession.
This
study
provides
scientific
evidence
support
management
ecological
restoration
while
offering
technical
assistance
regional
improvement
poverty
alleviation.
Remote Sensing,
Год журнала:
2024,
Номер
16(16), С. 2905 - 2905
Опубликована: Авг. 8, 2024
Gully
erosion
poses
a
significant
global
concern
due
to
its
role
in
land
degradation
and
soil
erosion,
particularly
pronounced
Northeast
China’s
diverse
agro-geomorphic
regions.
However,
there
is
lack
of
comprehensive
studies
on
gully
characteristics,
development
rates,
the
topographic
threshold
formation
these
areas.
To
address
this
gap,
we
selected
three
different
watersheds,
named
HL
(Hailun),
ML
(Muling),
YKS
(Yakeshi),
with
areas
30.88
km2,
31.53
21.98
respectively.
Utilizing
high-resolution
(2.1
m,
2
m)
remote
sensing
imagery
(ZY-3,
GF-1),
analyzed
morphological
parameters
(length,
width,
area,
perimeter,
etc.)
use
changes
for
all
permanent
gullies
between
2013
2023.
Approximately
30%
were
detailed
study
upstream
drainage
area
head
slopes
establish
(S
=
a·A−b).
In
HL,
ML,
YKS,
average
lengths
526.22
208.64
614.20
respectively,
corresponding
widths
13.28
8.45
9.32
m.
The
number
densities
3.14,
25.18,
0.82/km2,
density
1.65,
5.25,
0.50
km
km−2,
3%,
5%,
1%
has
disappeared
exhibited
highest
retreat
rate
at
17.50
m
yr−1,
significantly
surpassing
(12.24
yr−1)
(7.11
yr−1).
Areal
rates
(277.79
m2
lowest
(105.22
yr−1),
intermediate
243.36
yr−1.
was
no
difference
expansion
(0.37–0.42
among
(p
>
0.05).
Differences
dynamics
regions
influenced
by
use,
slope,
factors.
a·A−b)
varied:
emphasized
(a
0.052,
b
0.52),
highlighted
resistance
0.12,
0.36),
fell
within
range
0.044,
0.27).
This
enriched
scope
database
research,
providing
scientific
basis
prevention
control
planning
China.
