Environmental Sciences Europe,
Год журнала:
2024,
Номер
36(1)
Опубликована: Апрель 21, 2024
Abstract
Obtaining
accurate
spatial
maps
of
soil
organic
carbon
(SOC)
in
farmlands
is
crucial
for
assessing
quality
and
achieving
precision
agriculture.
The
cropping
system
an
important
factor
that
affects
the
cycle
farmlands,
different
agricultural
managements
under
systems
lead
to
heterogeneity
SOC.
However,
current
research
often
ignores
differences
main
controlling
factors
SOC
systems,
especially
when
pattern
complex,
which
not
conducive
farmland
zoning
management.
This
study
aims
(i)
obtain
distribution
map
six
by
using
multi-phase
HJ-CCD
satellite
images;
(ii)
explore
stratified
heterogeneous
relationship
between
environmental
variables
Cubist
model;
(iii)
predict
Xiantao,
Tianmen,
Qianjiang
cities,
are
core
areas
Jianghan
Plain,
were
selected
as
area.
Results
showed
content
rice–wheat
rotation
was
highest
among
systems.
model
outperformed
random
forest,
ordinary
kriging,
multiple
linear
regression
mapping.
results
system,
climate,
attributes,
vegetation
index
influencing
farmlands.
different.
Specifically,
summer
crop
types
had
a
greater
influence
on
variations
than
winter
crops.
Paddy–upland
more
affected
river
distance
NDVI,
while
upland–upland
irrigation-related
factors.
work
highlights
differentiated
provides
data
support
can
improve
prediction
accuracy
complex
Abstract
Combined
straw
and
straw-derived
biochar
input
is
commonly
applied
by
farmland
management
in
low-fertility
soils.
Although
return
increases
soil
organic
matter
(SOM)
contents,
it
also
primes
SOM
mineralization.
The
mechanisms
which
active
microorganisms
mineralize
the
underlying
factors
remain
unclear
for
such
To
address
these
issues,
paddy
was
amended
with
13
C-labeled
straw,
without
(BC)
or
ferrihydrite
(Fh),
incubated
70
days
under
flooded
conditions.
Compound-specific
C
analysis
of
phospholipid
fatty
acids
(
C-PLFAs)
allowed
us
to
identify
microbial
communities
utilizing
specific
groups
involved
Cumulative
mineralization
increased
61%
27%
soils
Straw
+
BC
Fh
BC,
respectively,
compared
that
only.
total
PLFA
content
independent
input.
However,
C-PLFAs
contents
35–82%
after
addition,
reflecting
accelerated
turnover.
Compared
those
had
an
altered
community
composition-increased
amounts
gram-positive
bacteria
C-Gram
+)
fungi,
were
main
mineralizing
SOM.
Microbial
reproduction
growth
susceptible
nutrient
availability.
C-fungi
Olsen
P
but
decreased
dissolved
carbon
$${\text{NO}}_{3}^{
-
}$$
NO3-
contents.
In
conclusion,
acts
as
electron
shuttle,
stimulates
iron
reduction,
releases
from
minerals,
turn
Gram
fungi
decomposition
response
application
responsible
Graphical
Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(49)
Опубликована: Ноя. 27, 2024
Habitats
with
intermittent
flooding,
such
as
paddy
soils,
are
crucial
reservoirs
in
the
global
carbon
pool;
however,
effect
of
phage–host
interactions
on
biogeochemical
cycling
soils
remains
unclear.
Hence,
this
study
applied
multiomics
and
datasets
integrated
validation
experiments
to
investigate
community
potential
phages
impact
sequestration
soils.
The
results
demonstrated
that
soil
harbor
a
diverse
abundant
repertoire
auxiliary
metabolic
genes
(AMGs)
associated
fixation,
comprising
23.7%
identified
AMGs.
successful
annotation
protein
structures
promoters
further
suggested
an
elevated
expression
these
within
their
bacterial
hosts.
Moreover,
environmental
stressors,
heavy
metal
contamination,
cause
genetic
variation
up-regulate
fixation
AMGs,
by
significant
enrichment
related
metabolites
(
P
<
0.05).
Notably,
findings
indicate
lysogenic
infecting
carbon-fixing
hosts
increased
10.7%
under
stress.
In
addition,
situ
isotopic
labeling
induced
mitomycin-C
revealed
increasing
concentrations,
13
CO
2
emissions
from
treatment
added
phage
decreased
approximately
17.9%.
contrast,
C-labeled
microbial
biomass
content
average
35.4%
compared
control.
These
suggest
prominently
influence
cycle,
particularly
change
conditions.
This
research
enhances
our
understanding
cooperation
driving
amid
evolving
