Elementa Science of the Anthropocene,
Год журнала:
2021,
Номер
9(1)
Опубликована: Янв. 1, 2021
Agricultural
practices
such
as
fertilization
considerably
influence
soil
greenhouse
gas
fluxes.
However,
the
effects
of
on
gases
fluxes
remain
unclear
in
tea
when
nitrogen
is
low.
In
present
study,
CO2
and
CH4
under
various
treatments
were
investigated
during
a
50-day
period.
The
experiment
consisted
five
treatments:
no
fertilizer
(CK),
single
(urea,
N),
oilseed
rape
cake
(R),
+
(2:1,
NR1),
(1:2,
NR2).
proportion
NR1
NR2
was
determined
by
content
fertilizer.
results
revealed
that
application
had
significant
effect
flux.
addition
significantly
increased
emissions
through
enhanced
microbial
biomass
carbon
(MBC).
Additionally,
directly
proportional
to
amount
(C)
All
minor
sinks
for
except
treatment
NR1.
Specifically,
cumulative
higher
than
rest
three
treatments,
which
implies
urea
reduced
capability
oxidation
soil.
Structural
equation
models
indicated
flux
positively
correlated
with
dissolved
organic
carbon,
MBC
pH,
while
mineral
main
factor
affecting
Overall,
promoted
C
sequestration
but
inevitably
emissions.
Biology and Fertility of Soils,
Год журнала:
2020,
Номер
56(8), С. 1093 - 1107
Опубликована: Май 14, 2020
Stoichiometric
control
of
input
substrate
(glucose)
and
native
soil
organic
C
(SOC)
mineralization
was
assessed
by
performing
a
manipulation
experiment
based
on
N
or
P
fertilization
in
paddy
soil.
Glucose
increased
with
nutrient
addition
up
to
11.6%
combined
application
compared
that
without
addition.
During
100
days
incubation,
approximately
4.5%
SOC
mineralized
stimulated
glucose
exponentially
dissolved
(DOC):NH4+-N,
DOC:Olsen
P,
microbial
biomass
(MB)C:MBN
ratios.
The
relative
abundances
Clostridia
β-Proteobacteria
(r-strategists)
were
NP
at
the
beginning
experiment,
while
Acidobacteria
(K-strategists)
enhanced
exhaustion
available
resource
end
incubation.
bacteria
abundance
diversity
negatively
related
DOC:NH4+-N
which
had
direct
positive
effects
(+
0.63)
mineralization.
Combined
decreased
network
density
bacterial
community.
Moreover,
significantly
negative
associations
among
taxa,
suggested
competition
for
nutrients
alleviated.
keystone
species
showed
significant
correlations
soils
application,
revealing
microbes
their
activity
mining
limited
from
matter.
Hence,
shifted
community
composition
interactions
acquire
necessary
elements
increasing
maintain
C:N:P
stoichiometric
balance
response
changes
stoichiometry.
Frontiers in Microbiology,
Год журнала:
2023,
Номер
13
Опубликована: Янв. 12, 2023
Biogenic
nitrous
oxide
(N2O)
from
nitrification
and
denitrification
in
agricultural
soils
is
a
major
source
of
N2O
the
atmosphere,
its
flux
changes
significantly
with
soil
moisture
condition.
However,
quantitative
relationship
between
production
different
pathways
(i.e.,
vs.
denitrification)
content
remains
elusive,
limiting
our
ability
predicting
future
emissions
under
changing
environment.
This
study
quantified
rates
various
conditions
using
laboratory
incubation
combined
literature
synthesis.
15N
labeling
approach
was
used
to
differentiate
eight
contents
ranging
40
120%
water-filled
pore
space
(WFPS)
study,
while
80
groups
data
17
studies
across
global
were
collected
Results
showed
that
as
increased,
first
increased
then
decreased,
peak
occurring
95%
WFPS.
By
contrast,
dominant
pathway
switched
60
70%
Furthermore,
synthetic
elucidated
driver
controlling
relative
contributions
production,
NH4
+
NO3
-
concentrations
mainly
determined
each
pathway.
The
treatments
broad
narrow
gradient
required
capture
comprehensive
response
rate
change,
essential
for
accurately
emission
climate
change
scenarios.
Environment International,
Год журнала:
2024,
Номер
190, С. 108781 - 108781
Опубликована: Май 28, 2024
As
an
exogenous
carbon
input,
microplastics
(MPs),
especially
biodegradable
MPs,
may
significantly
disrupt
soil
microbial
communities
and
element
cycling
(CNPS
cycling),
but
few
studies
have
focused
on
this.
Here,
we
assessing
the
effects
of
conventional
low-density
polyethylene
(LDPE),
polybutylene
adipate
terephthalate
(PBAT),
polylactic
acid
(PLA)
MPs
rhizosphere
CNPS
in
a
soil-soybean
system.
The
results
showed
that
PBAT-MPs
PLA-MPs
were
more
detrimental
to
soybean
growth
than
LDPE-MPs,
resulting
reduction
shoot
nitrogen
(14.05%
11.84%)
biomass
(33.80%
28.09%)
at
podding
stage.
In
addition,
dissolved
organic
(DOC)
increased
by
20.91%
66.59%,
while
nitrate
(NO
Global Change Biology,
Год журнала:
2024,
Номер
30(2)
Опубликована: Фев. 1, 2024
Abstract
Flooded
paddy
soils
after
rewetting
dry
accompanied
by
extensive
nitrogen
fertilizer
input
are
important
anthropogenic
N
2
O
emitters
due
to
the
denitrification
process.
Owing
multiple
complex
denitrifying
sources,
however,
extent
which
biotic
(fungal
or
bacterial)
and
abiotic
(chemical)
contribute
total
emissions
remains
largely
unquantified.
Here
we
sampled
across
eight
provinces
where
most
of
flooded
were
in
China
explore
microbial
potentials
decipher
dynamics.
isotopocules
site
preference
(δ
15
SP
)
analyses
found
that
soils,
fungi‐mediated
was
largest
contributor
(51%–63%);
while
bacterial
chemical
denitrifications
contributed
12%–31%
12%–28%
emissions,
respectively.
Further,
using
labeling,
a
significant
spatial
heterogeneity
performance
observed
among
these
soils.
As
indicated
variance
partitioning
regression
analyses,
this
mainly
determined
soil
properties
(especially
organic
carbon
nitrogen)
rather
than
communities.
Our
findings
provide
insights
into
establishment
predictive
models
future
emission
from
global
considering
both
contributions.
