Agricultural Water Management,
Год журнала:
2023,
Номер
279, С. 108178 - 108178
Опубликована: Янв. 23, 2023
Soil
microorganisms
are
key
drivers
of
soil
nutrient
cycling
and
agroecosystem
sustainability.
Despite
their
critical
roles
in
evolution
processes,
the
variation
microbial
communities
cotton
fields
with
different
years
practicing
mulched
drip
irrigation
remains
poorly
understood.
The
objectives
this
study
were
to
investigate
effects
(i.e.,
CK,
11,
13,
15,
21
years)
on
properties
an
oasis
by
using
high-throughput
sequencing
16
S/ITS
gene.
results
showed
that
EC
decreased
significantly
after
lowest
value
occurred
21-year
treatment,
74.43%.
organic
carbon,
available
nitrogen,
phosphorus
potassium
increased
length
under
irrigation.
abundance
dominated
bacterial
phyla
(Actinobacteria,
Bacteroidetes,
Rokubacteria)
varied
among
irrigation,
no
significant
change
was
found
fungal
community
at
level.
genera
Cephalotrichum
(21.82–68.96%)
extension.
Non-metric
multidimensional
scale
analyses
(NMDS)
differed
treatments
(P
=
0.001).
more
positive
co-occurrence
relationships
bacteria
fungi,
highest
Shannon
Simpson
values
observed
13-year
fungi
correlated
EC,
total
potassium,
carbon.
Our
indicated
long-term
affected
structures
interactions
reducing
salinity
regulating
concentrations,
capable
enhancing
diversity
region.
Ecotoxicology and Environmental Safety,
Год журнала:
2021,
Номер
229, С. 113045 - 113045
Опубликована: Дек. 7, 2021
The
threat
of
microplastic
(MP)
pollution
soil
ecosystems
has
aroused
global
concern;
however,
relatively
few
studies
have
focused
on
the
effects
MPs
both
bacterial
and
fungal
communities
in
soil.
In
this
study,
a
310-day
incubation
experiment
was
designed
to
examine
7%
14%
(W/W)
polyethylene
(PE),
polystyrene
(PS),
polyvinyl
chloride
(PVC)
enzyme
activities
as
well
communities.
findings
revealed
that
all
three
kinds
stimulated
activities,
with
PVC,
PS,
PE
having
greatest
impact
catalase,
urease,
alkaline
phosphatase.
did
not
change
types
but
relative
abundance
these
phyla
mainly
increased
Proteobacteria,
Actinobacteria,
Ascomycota
declined
Acidobacteria,
Basidiomycota,
Chytridiomycota.
response
fungi
stronger
than
bacteria,
diversity
more
sensitive
PVC
had
microbial
PICRUSt
analysis
promoted
metabolic
function
bacteria.
Based
FUNGuid
tool,
it
found
significant
fungi,
which
were
closely
related
plant
growth.
These
results
indicate
depends
type
concentration
bacteria
are
affected
differently
by
MPs.
Future
could
be
different
what
effect
will
difference
Geoderma,
Год журнала:
2023,
Номер
432, С. 116393 - 116393
Опубликована: Фев. 22, 2023
Although
the
impact
of
land
conversion
on
carbon
mineralization
in
paddy
soils
has
received
increasing
attention,
coupled
roles
soil
microdiversity
and
chemodiversity
these
processes
are
largely
unknown.
To
address
this
issue,
use
from
fields
(PF)
to
vegetable
(VF),
rice-vegetable
rotation
(RV),
abandoned
(AL),
were
investigated
study.
The
relationships
between
characteristics
microbial
community,
metabolism
physiology
dissolved
organic
matter
(DOM)
analyzed.
After
conversion,
enhanced
AL
RV,
which
217.49%
183.02%
that
PF.
In
contrast,
no
significant
change
was
observed
VF,
although
anaerobic
environment
transformed
into
an
aerobic
one
fungal
richness/
diversity
increased
soil.
This
because
directly
regulated
by
DOM
quantity
labile
carbon,
indirectly
community.
Specifically,
largest
attributed
strongest
as
had
DOC
contents,
hydrophilic
substances
(e.g.,
carboxyl,
carbohydrate,
amino),
abundant
eutrophic
taxa
Actinobacteria
Proteobacteria).
VF
mainly
related
more
condensed
aromatics
oligotrophic
microbes,
fewer
soil,
resulting
dominance
recalcitrant
carbon.
also
prevailed
RV.
However,
RV
showed
moderate
due
having
proper
with
high
bioavailability.
Collectively,
results
provide
molecular
insights
a
micro-chemodiversity
perspective,
highlights
importance
nutrient
supply
strategy.
Ecological Indicators,
Год журнала:
2021,
Номер
129, С. 107932 - 107932
Опубликована: Июнь 28, 2021
Uneven-aged
silvicultural
practices
can
maintain
habitat
continuity
and
enhance
biodiversity.
Soil
microorganisms
play
critical
roles
in
multiple
ecosystem
functions
(i.e.,
multifunctionality).
However,
little
is
currently
known
regarding
the
role
of
microbial
community
driving
soil
nutrient
cycling
multifunctionality
(SMF)
uneven-aged
mixed
plantations.
In
this
study,
we
investigated
bacterial
fungal
compositions
diversities,
single-function
related
carbon
(C),
nitrogen
(N),
phosphorus
(P)
cycling,
SMF
indices
monoculture
plantation
(as
a
control)
three
stands
(4,
7,
11
years
old).
Our
results
demonstrated
that
C,
N,
P
plantations
increased
by
17.9–55.2%,
20.0–54.0%,
0.7–21.6%,
16.3–30.1%
compared
to
plantation.
The
alpha
diversity
(richness
Shannon
diversity),
significantly
improved
with
stand
age,
but
showed
less
variation.
beta
diversities
bacteria
fungi
notable
variation
age
were
predominantly
affected
properties
(soil
organic
total
P,
C/N
ratio),
respectively.
Additionally,
temporal
turnover
within
was
higher
than
rates
community.
biomass
more
sensitive
structure
change
over
short
period
(11
years)
biomass.
Furthermore,
fungi/bacteria
(F/B)
ratio
strongly
positively
correlated
SMF.
Most
importantly,
abundant
taxa
(e.g.,
Mucoromycota
Mortierellomycota)
major
drivers
SMF,
followed
rare
Nitrospirae
Elusimicrobia).
These
findings
indicate
communities
have
different
responses
undertake
important
maintaining
when
converted
into
an
Frontiers in Microbiology,
Год журнала:
2022,
Номер
13
Опубликована: Июнь 27, 2022
Soil
microbes
regulate
the
carbon
cycle
and
affect
formation
stabilization
of
soil
aggregates.
However,
interactions
between
microbial
community
organic
(SOC)
fractions,
(OC)
content
in
aggregates,
aggregate
stability
after
afforestation
are
remain
poorly
understood.
In
our
study,
we
investigated
SOC
fractions
bulk
soil,
aggregate-associated
OC
content,
stability,
bacterial
with
high-throughput
16S
rRNA
sequencing
at
sites
representing
natural
secondary
forest
(NF)
managed
(MF),
cropland
(CL)
as
reference
a
degraded
karst
region
Southwest
China.
Our
results
showed
that
remarkably
increased
fraction
mean
weight
diameter
(MWD),
geometric
(GMD).
The
most
dominant
phyla
detected
were
Acidobacteriota
,
Actinobacteriota
Proteobacteria
Chloroflexi
across
all
soils.
Afforestation
altered
relative
abundances
bacteria
phylum,
class,
order
levels.
Interestingly,
such
changes
abundance
taxa
had
significantly
effects
on
fraction,
MWD,
MGD.
Methylomirabilota
Latescibacterota
Methylomirabilia
MB-A2-108
norank_Latescibacterota
;
Dehalococcoidia
Rokubacteriales
Gaiellales
Microtrichales
norank_c__MB-A2-108
norank_c__norank_p__Latescibacterota
Rhizobiales
S085
not
only
but
also
significant
positive
afforestation.
Moreover,
MWD
MGD
positively
correlated
.
Results
indicated
importance
certain
for
regulating
storage
stability.
We
concluded
could
alter
bacteria,
these
modulate
aggregates
fractions.
