Ecosystem Health and Sustainability,
Год журнала:
2024,
Номер
10
Опубликована: Янв. 1, 2024
Alpine
forest
soil
in
the
southeastern
Qinghai–Xizang
Plateau
plays
a
crucial
role
regional
and
global
climate
biogeochemical
cycles,
yet
elevational
distribution
of
nitrogen
(N)
availability
losing
risk
is
unresolved.
In
this
study,
we
characterized
N
composition
key
transformation
processes
across
different
elevations
3
typical
mounts
Plateau.
contrast
to
previous
suggestions,
total
ammonium
are
found
accumulate
high
elevation
zones.
This
accumulation
at
higher
altitudes
due
consistent
net
mineralization
rate
coupled
with
an
extremely
low
nitrification
rate,
which
suppressed
by
pH
moisture
Moreover,
elevated
rates
biological
fixation
along
further
contribute
regions
acid-tolerant
Bradyrhizobium
,
plant-associated
Herbaspirillum
Klebsiella
identified
as
diazotrophic
microbial
taxa
responsible
for
active
fixation.
Collectively,
our
results
suggest
that
NH
4
+
-N
altitude
zone
ubiquitous
phenomenon
southeast
Plateau,
lower
being
enabling
occurrence.
To
investigate
the
effects
of
row
ratio
configurations
on
intercropping
advantages
and
related
rhizosphere
microbial
communities,
a
field
experiment
involving
five
treatments
different
rows
broomcorn
millet,
i.e.,
P1M1
(1
millet
intercropped
with
1
alfalfa),
P2M3,
P1M2,
P1M3
alone
(SP),
was
conducted
Loess
Plateau
China.
We
analyzed
yield,
nutritional
content
soil
nutrient
availability
diversity
community
composition
AMF
(arbuscular
mycorrhizal
fungi)
diazotrophs
in
millet.
The
results
showed
that
compared
monocultures,
alfalfa-millet
system
under
significantly
increased
yield
absorption
PTP
PTK
(total
phosphorus
potassium
millet).
In
addition,
millet-alfalfa
also
improved
nutrition,
decrease
changes
TN,
NH4+-N
biomass
were
consistent,
which
opposite
to
NO3−-N.
Moreover,
co-occurrence
network
PLS-PM
(partial
least
squares
path
modelling)
analysis
alfalfa-broomcorn
changed
microorganisms,
improvement
nutrition
(TN,
biomass),
promoted
nutrients
by
plants
(N,
P
K)
mainly
through
negative
regulation
synergistic
effect
diazotrophs,
finally
crop
yield.
This
shows
can
increase
plant
adjusting
activities,
thereby
increasing
Furthermore,
we
found
1P2M
best
system,
may
provide
reliable
suggestions
selection
basis
for
future
agricultural
production
practices.
Journal of Fungi,
Год журнала:
2024,
Номер
10(4), С. 280 - 280
Опубликована: Апрель 10, 2024
The
crucial
functional
arbuscular
mycorrhizal
fungi
(AMF)
and
diazotrophs
play
pivotal
roles
in
nutrient
cycling
during
vegetation
restoration.
However,
the
impact
of
managed
restoration
strategies
on
AMF
diazotroph
communities
remains
unclear.
In
this
study,
we
investigated
community
structure
diversity
a
karst
region
undergoing
from
cropland.
Soil
samples
were
collected
soils
under
three
strategies,
plantation
forest
(PF),
forage
grass
(FG),
mixture
(FF),
along
with
control
for
cropland
rotation
(CR).
both
was
impacted
by
Specifically,
Shannon
index
higher
CR
PF
compared
to
FF.
Conversely,
richness
lower
CR,
PF,
FG
than
Furthermore,
compositions
differed
between
relative
abundance
taxa,
such
as
Glomus,
FF
other
land-use
types,
while
Racocetra
showed
opposite
trend.
Among
Anabaena,
Nostoc,
Rhizobium
CR.
properties
total
potassium,
available
pH,
nitrogen
identified
main
factors
influencing
diversity.
These
findings
suggest
that
more
sensitive
rather
after
cropland,
despite
similar
levels
soil
nutrients
among
FG,
Consequently,
integration
diverse
economic
tree
species
grasses
mixed
plantations
notably
altered
composition
diazotrophs,
primarily
through
promotion
biocrust
formation
root
establishment.
