Differential impacts of nitrogen addition on soil dissolved organic carbon in humid and non-humid regions: A global meta-analysis
Journal of Environmental Management,
Год журнала:
2025,
Номер
377, С. 124744 - 124744
Опубликована: Март 1, 2025
Язык: Английский
Long-term effects of nitrogen and phosphorus fertilization on profile distribution and characteristics of dissolved organic matter in fluvo-aquic soil
Yumei Peng,
Lingan Niu,
Yalei Hu
и другие.
Journal of Environmental Management,
Год журнала:
2024,
Номер
366, С. 121834 - 121834
Опубликована: Июль 14, 2024
Язык: Английский
Simultaneous adsorption of fulvic acid and organic contaminants by KOH activated mesoporous biochar with large surface area
Heliyon,
Год журнала:
2024,
Номер
10(6), С. e27055 - e27055
Опубликована: Март 1, 2024
Returning
carbon
materials
from
biomass
to
soil
is
a
potential
technology
retard
organic
contaminants
or
dissolved
matter
(DOM)
in
by
adsorption,
as
well
store
for
sequestration.
However,
DOM
was
widely
reported
inhibit
adsorption
of
on
competition
and
enhancing
contaminants'
solubility.
In
this
study,
KOH
activated
material
(KAC),
pyrolyzed
bamboo
chips,
with
high
surface
area
(3108
m2/g),
micropores
volumes
(0.964
cm3/g),
mesopores
(1.284
observed
that
it
can
adsorb
fulvic
acid
(FA)
(e.g.,
nitrobenzene,
phenols,
anilines)
simultaneously
weak
capacity.
With
50
mg
TOC/L
FA,
example,
the
average
suppressing
rate
(ΔKf/Kf-m)
KAC
lower
than
5%,
FA
were
higher
1100
mg/g
90
TOC/g,
respectively.
The
could
be
attributed
low
micropore
blockage
(<35%)
sites
KAC,
minimal
solubility
enhancement
because
most
adsorbed
but
not
solution.
addition,
hydrogen-bonding
donor
ability
(αm)
affinity
less
suppressed
heterogeneous
nature
hydrophilic
KAC's
surface.
Therefore,
produced
implement
storage
simultaneous
retarding
DOM.
Язык: Английский
Nitrogen and Water Additions Affect N2O Dynamics in Temperate Steppe by Regulating Soil Matrix and Microbial Abundance
Agriculture,
Год журнала:
2025,
Номер
15(3), С. 283 - 283
Опубликована: Янв. 28, 2025
Elucidating
the
effects
of
nitrogen
and
water
addition
on
N2O
dynamics
is
critical,
as
a
key
driver
climate
change
(including
deposition
shifting
precipitation
patterns)
stratospheric
ozone
depletion.
The
temperate
steppe
notable
natural
source
this
potent
greenhouse
gas.
This
study
uses
field
observations
soil
sampling
to
investigate
seasonal
pattern
emissions
in
Inner
Mongolia
mechanism
by
which
additions,
two
different
types
factors,
alter
pattern.
It
explores
regulatory
roles
environmental
physicochemical
properties,
microbial
community
structure,
abundance
functional
genes
influencing
emissions.
These
results
indicate
that
emission
mechanisms
vary
throughout
growing
season.
Nitrogen
application
consistently
increase
In
contrast,
suppresses
during
early
season
but
promotes
peak
late
seasons.
season,
primarily
increased
dissolved
organic
(DON)
levels,
provided
matrix
for
nitrification
promoted
Meanwhile,
moisture,
enhancing
nosZ
(nitrous
oxide
reductase)
gene
while
reducing
nitrate
(NO3−-N)
well
AOA
(ammonia-oxidizing
archaea)
amoA
AOB
bacteria)
expression,
thereby
lowering
During
nitrogen’s
role
adjusting
pH
ammonium
(NH4+-N),
along
with
amplifying
amoA,
spiked
Water
affects
balance
between
denitrification
altering
aerobic
anaerobic
conditions,
ultimately
increasing
inhibiting
nosZ.
As
waned
decreased,
temperature
also
became
Structural
equation
modeling
reveals
impacts
flux
variations
through
are
more
significant
research
uncovers
innovative
insights
into
how
additions
differently
impact
across
various
stages
steppe,
providing
scientific
basis
predicting
managing
within
these
ecosystems.
Язык: Английский
Impact of nitrogen addition on the chemical properties and bacterial community of subtropical forests in northern Guangxi
Xingjian Jiang,
Ou Zhiyang,
Changqiang Tan
и другие.
Frontiers in Microbiology,
Год журнала:
2024,
Номер
15
Опубликована: Авг. 15, 2024
Introduction
In
recent
years,
nitrogen
deposition
has
constantly
continued
to
rise
globally.
However,
the
impact
of
on
soil
physicochemical
properties
and
microbial
community
structure
in
northern
Guangxi
is
still
unclear.
Methods
Along
these
lines,
this
work,
investigate
atmospheric
nutrient
status
bacterial
subtropical
regions,
four
different
treatments
(CK:
0
gN
m
–2
a
–1
,
II:
50
III:
100
IV:
150
gNm
–
2
)
were
established.
The
focus
was
analyzing
physical
chemical
properties,
as
well
characteristics
across
varying
application
levels.
Results
discussion
From
acquired
results,
it
demonstrated
that
led
significant
decrease
pH.
Compared
with
CK,
pH
treatment
IV
decreased
by
4.23%,
which
corresponded
an
increase
organic
carbon
total
nitrogen.
Moreover,
compared
increased
9.28%,
19.69%.
no
available
phosphorus
detected.
diversity
index
first
then
level.
dominant
phylum
Acidobacteria
(34.63–40.67%),
Proteobacteria
Chloroflexi
.
Interestingly,
abundance
notably
higher
levels,
particularly
evident
group
where
surpassed
control
group.
Considering
addition
changes
nutrients
lowers
pH,
certain
oligotrophic
bacteria
like
can
be
caused,
showed
decreasing
increasing
trend.
On
contrary,
eutrophic
bacteria,
such
Actinobacteria
displayed
decline.
redundancy
analysis,
highlighted
primary
driving
forces
affecting
composition.
Язык: Английский
Effects of nutrient addition on the composition and chemical characteristics of soil dissolved organic matter in a desert steppe in northern China
Land Degradation and Development,
Год журнала:
2023,
Номер
35(4), С. 1365 - 1380
Опубликована: Ноя. 27, 2023
Abstract
Dissolved
organic
matter
(DOM)
plays
a
critical
role
in
ecosystem
function
and
productivity,
particularly
carbon
(C)
cycling
grassland
ecosystems.
However,
changes
the
structural
complexity
of
DOM
desert
steppe
following
long‐term
treatment
with
nitrogen
(N)
phosphorus
(P)
remain
unclear;
this
limits
our
understanding
nutrient‐related
soil
C
cycle
steppe.
In
present
study,
experiments
were
conducted
0–10
cm
layer
northern
China
from
2017
to
2021,
four
treatments
established:
P,
N,
N
+
P
(NP),
no
nutrient
addition
(CK).
The
content
chemical
composition
determined
by
ultraviolet–visible
absorbance,
fluorescence,
Fourier
transform
infrared
spectroscopy.
Compared
CK
treatment,
increased
2.86%–53.84%.
NP
average
molecular
weight,
aromaticity,
humification
degree
DOM.
source
was
attributed
combination
foreign
local
sources.
Fluorescent
components
samples
mainly
proteins
humic
acids;
acid
decreased
after
addition.
Nutrient
availability
pH
key
factors
affecting
weight
DOM,
respectively.
significantly
positively
correlated
index
(
r
=
0.96).
These
results
imply
that
accelerates
accumulation
influences
its
complexity;
potentially
benefits
sequestration
Язык: Английский