Unveiling the impact of biodegradable polylactic acid microplastics on meadow soil health
Abstract
Soil
microplastics
(MPs)
pollution
has
garnered
considerable
attention
in
recent
years.
The
use
of
biodegradable
plastics
for
mulching
led
to
significant
quantities
plastic
entering
agro-ecosystems.
However,
the
effects
polylactic
acid
(PLA)
on
meadow
soils
remain
underexplored.
This
study
investigates
impacts
PLA
varying
particle
sizes
and
concentrations
soil
physicochemical
properties,
enzyme
activities,
microbial
communities
through
a
60-day
incubation
experiment.
PLA-MPs
increased
pH,
organic
matter
(SOM),
total
nitrogen
(TN)
available
potassium
(AK)
content,
as
well
enhanced
activities
superoxide
dismutase
(S-SOD),
peroxidase
(S-POD),
catalase
(S-CAT),
β-glucosidase(S-β-GC)
urease
(S-UE)
activities.
Conversely,
decrease
alkaline
phosphatase
(S-ALP)
activity
was
observed.
influence
properties
more
pronounced
with
larger
sizes,
whereas
smaller
particles
had
greater
effect
Additionally,
an
increase
abundance
Acidobacteriota,
Chloroflexi,
Gemmatimonadota,
while
Proteobacteria,
Actinobacteriota,
Patescibacteria
declined.
Mental
test
analysis
indicated
that
AK,
S-UE,
S-β-GC
are
primary
factors
influencing
community
composition.
Phylogenetic
Investigation
Communities
by
Reconstruction
Unobserved
States
(PICRUSt2)
demonstrated
modify
bacterial
metabolic
pathways.
Our
results
suggest
size
concentration
differentially
affect
nutrients
structure
function,
observed
at
higher
concentrations.
Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 13, 2024
Language: Английский