Agronomy,
Journal Year:
2024,
Volume and Issue:
14(11), P. 2551 - 2551
Published: Oct. 30, 2024
Green
manure
is
widely
applied
in
agricultural
production
due
to
its
beneficial
soil
modification
and
fertilization
effects.
However,
the
mechanisms
underlying
effects
of
green
return
methods
on
respiration
(Rs)
components
remain
unclear.
This
study
aimed
investigate
Rs
maize
fields
by
quantifying
levels.
A
field
experiment
was
conducted
from
2021
2023
inland
river
oasis
irrigation
area
Gansu,
with
five
treatment
conditions:
tillage
a
full
quantity
incorporated
into
(TG),
no
mulched
surface
(NTG),
roots
above-ground
removed
(T),
(NT),
conventional
leisure
(CT).
The
results
showed
that,
compared
CT,
NTG
increased
grain
yield
while
reducing
heterotrophic
rate
(Rh)
8.5–9.8%
6.7–8.7%,
but
did
not
significantly
affect
autotrophic
(Ra),
decreased
carbon
emission
efficiency
(CEE)
20.8–25.6%.
increase
water
content
(SWC)
reduced
Rh
during
all
growth
periods,
which
primary
factor
reduction
Rs.
Additionally,
net
ecosystem
productivity
sequestration
(NEP-C)
farmland
positive
under
this
system,
indicating
that
acts
as
“sink”.
Therefore,
no-tillage
can
be
used
reasonable
method
reduce
emissions
arid
regions.
Plants,
Journal Year:
2025,
Volume and Issue:
14(8), P. 1251 - 1251
Published: April 20, 2025
Soil
active
nitrogen
(N)
fractions
are
essential
for
plant
growth
and
nutrient
cycling
in
terrestrial
ecosystems.
While
previous
studies
have
primarily
focused
on
the
impact
of
vegetation
restoration
soil
karst
ecosystems,
role
microclimate
variation
rocky
desertification
areas
has
not
been
well
explored.
This
study
investigates
key
biotic
abiotic
factors
across
four
grades
desertification—non-rocky
(NRD),
light
(LRD),
moderate
(MRD),
intense
(IRD)—within
two
distinct
microclimates:
a
dry-hot
valley
humid
monsoon
zone
region
Guizhou
Province,
China.
We
evaluate
organic
carbon
(SOC),
total
(TN),
phosphorus
(TP),
nitrate
(NO3−-N),
ammonium
(NH4+-N),
microbial
biomass
(MBN),
soluble
(SON),
diversity.
Results
showed
that
SOC,
TN,
TP
were
significantly
higher
IRD
areas.
NO3−-N,
MBN,
SON
initially
decreased
before
increasing,
with
consistent
MBN
valley.
NH4+-N
did
differ
under
NRD
but
was
LRD,
MRD,
IRD.
The
had
most
grades.
Microclimate
influenced
N,
levels
LRD
MRD
conditions.
Plant
diversity
regeneration
varied
markedly
between
microclimates.
In
valley,
Artemisia
dominated
herbaceous
regeneration,
especially
Conversely,
more
diverse
Bidens
prevalent
Despite
declining
desertification,
displayed
greater
resilience.
These
findings
highlight
influencing
dynamics
gradients,
offering
insights
strategies
