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.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Авг. 19, 2023
Grazing
by
domestic
herbivores
is
the
most
widespread
land
use
on
planet,
and
also
a
major
global
change
driver
in
grasslands.
Yet,
experimental
evidence
long-term
impacts
of
livestock
grazing
biodiversity
function
largely
lacking.
Here,
we
report
results
from
network
10
sites
paired
grazed
ungrazed
grasslands
across
an
aridity
gradient,
including
some
largest
remaining
native
planet.
We
show
that
partly
explains
responses
multifunctionality
to
grazing.
greatly
reduced
steppes
with
higher
aridity,
while
had
no
effects
relatively
lower
aridity.
Moreover,
found
further
changed
capacity
above-
below-ground
explain
multifunctionality.
Thus,
plant
diversity
was
positively
correlated
excluded
livestock,
soil
Together,
our
cross-site
experiment
reveals
depend
levels,
more
arid
experiencing
negative
ecosystem
highlight
fundamental
importance
conserving
for
protecting
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(8), С. 3145 - 3155
Опубликована: Фев. 16, 2023
1-Butyl-3-methylimidazolium
chloride
(BmimCl),
an
imidazolium-based
ionic
liquid,
is
considered
the
representative
emerging
persistent
aquatic
pollutant,
and
its
environmental
toxicity
has
attracted
a
growing
concern.
However,
most
of
investigations
focused
on
monocultures
or
single
organism,
with
little
information
available
complex
syntrophic
consortium
that
dominates
successional
biochemical
processes,
such
as
anaerobic
digestion.
In
this
study,
effect
BmimCl
at
environmentally
relevant
levels
glucose
digestion
was
therefore
investigated
in
several
laboratory-scale
mesophilic
digesters
to
provide
support.
Experimental
results
showed
1–20
mg/L
inhibited
methane
production
rate
by
3.50–31.03%,
20
butyrate,
hydrogen,
acetate
biotransformation
14.29%,
36.36%,
11.57%,
respectively.
Toxicological
mechanism
studies
revealed
extracellular
polymeric
substances
(EPSs)
adsorbed
accumulated
through
carboxyl,
amino,
hydroxyl
groups,
which
destroyed
EPSs'
conformational
structure,
thereby
leading
inactivation
microbial
cells.
MiSeq
sequencing
data
indicated
abundance
Clostridium_sensu_stricto_1,
Bacteroides,
Methanothrix
decreased
6.01%,
7.02%,
18.45%,
respectively,
response
BmimCl.
Molecular
ecological
network
analysis
compared
control,
lower
complexity,
fewer
keystone
taxa,
associations
among
taxa
were
found
BmimCl-present
digester,
indicating
reduced
stability
community.
Environment International,
Год журнала:
2024,
Номер
185, С. 108508 - 108508
Опубликована: Фев. 16, 2024
Microplastics
(MPs),
including
conventional
hard-to-biodegrade
petroleum-based
and
faster
biodegradable
plant-based
ones,
impact
soil
structure
microbiota
in
turn
affecting
the
biodiversity
functions
of
terrestrial
ecosystems.
Herein,
we
investigated
effects
MPs
on
aggregate
distribution
microbial
community
composition
microhabitats
at
scale.
Two
MP
types
(polyethylene
(PE)
polylactic
acid
(PLA)
with
increasing
size
(50,
150,
300
μm))
were
mixed
a
silty
loam
(0–20
cm)
ratio
0.5
%
(w/w)
rice–wheat
rotation
system
greenhouse
under
25
°C
for
one
year.
The
aggregation,
bacterial
communities
their
co-occurrence
networks
as
function
size.
Conventional
generally
had
similar
aggregation
communities.
They
increased
proportion
microaggregates
from
17
to
32
while
reducing
macroaggregates
84
68
%.
stability
decreased
1.4
mm
1.0–1.1
independently
due
decline
binding
agents
(e.g.,
byproducts
proteinaceous
substances).
type
amount
strongly
affected
structure,
accounting
approximately
54
variance.
Due
less
bioavailable
organics,
within
was
more
sensitive
addition.
Co-occurrence
network
analysis
revealed
that
exacerbated
competition
among
bacteria
complexity
networks.
Such
stronger
PE
than
PLA
higher
persistence
soils.
Proteobacteria,
Bacteroidetes,
Chloroflexi,
Actinobacteria,
Gemmatimonadetes
keystone
taxa
macroaggregates,
Actinobacteria
Chloroflexi
microaggregates.
most
Overall,
both
reduced
portion
large
stable
aggregates,
altering
structures
taxa.
Geoderma,
Год журнала:
2023,
Номер
436, С. 116562 - 116562
Опубликована: Июнь 11, 2023
Although
it
is
widely
accepted
that
crop
rotations
can
alleviate
the
adverse
effects
of
agricultural
intensification
on
ecosystem
functioning,
influence
rotational
diversification
soil
microbial
diversity,
network
complexity,
and
their
associations
with
multifunctionality
remains
unclear.
Here,
we
used
a
16-year
field
experiment
to
assess
effect
six
cropping
regimes,
respective
diversity
index
(CDI,
i.e.,
number
species
in
rotation
multiplied
by
per
year)
management
intensity
(MI,
anthropogenic
inputs
including
fertilizer
use,
pesticide
use
fuel
consumption
across
2-year
cycle),
community
(bacteria,
fungi
protists)
multifunctionality.
We
20
functions
related
properties,
basal
respiration,
enzymatic
activities
nitrogen
cycling
potential
characterize
Diversified
was
shown
enhance
Also,
increased
CDI,
but
were
negatively
correlated
or
had
hump-shaped
relationship
MI.
With
increase
microbiome
nodes,
edges
degree
increased,
betweenness
average
path
length
decreased.
An
MI
found
have
topological
properties
network.
Soil
complexity
stronger
than
composition.
This
study
illustrates
more
diverse
under
intermediate
promoted
multifunctionality,
highlights
crucial
role
maintaining
functions.
