Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: March 19, 2025
Abstract
Fulvic
acid
(FA)
has
many
physiological
activities,
but
the
specific
metabolic
responses
and
changes
in
mineral
element
contents
of
spinach
by
FA
response
to
nitrate
stress
are
unknown.
Herein,
we
used
liquid
chromatography-mass
spectrometry
(LC–MS)
wet
digestion
using
H
2
SO
4
-H
O
analyze
content
(150
mM
NO
3
−
)
after
(0.15%)
foliar
spray
application.
After
days
treatment,
was
sprayed
thrice
(once
every
7
days),
sampled
last
spraying,
metabolites
were
measured.
treatment
significantly
increased
organic
(tartaric
acid,
malic
citric
ascorbic
acid)
amino
(threonine,
asparagine,
valine,
tyrosine,
alanine,
glutamate,
serine,
histidine,
arginine,
glutamine)
under
stress.
application
also
improved
(P,
Na,
Fe,
Zn)
This
study
provides
comprehensive
insights
into
metabolite
accumulation
improvement
nutritional
quality
through
Further
research
should
focus
on
elucidating
additional
underlying
molecular
mechanisms
these
for
better
utilization
this
natural
compound
agriculture.
Plants,
Journal Year:
2025,
Volume and Issue:
14(4), P. 627 - 627
Published: Feb. 19, 2025
This
study
addresses
the
low
yield
and
fertilizer
utilization
efficiency
of
potatoes
in
arid
region
Xinjiang,
Northwest
China.
The
effect
a
novel,
fulvic
acid-based
specialized
for
drip
application
on
potato
growth,
development,
yield,
is
investigated.
aim
to
identify
suitable
formula
cultivation
Xinjiang
promote
its
demonstration
application,
providing
theoretical
basis
improving
achieving
stable,
high
yields
region.
experiment
was
conducted
with
variety
'Xisen
6'
using
field
trial
design,
which
included
five
treatments:
no
(CK),
conventional
(CF:
N-P-K
=
258-245-338
kg·ha-1),
formulated
1
(F1:
120
g·L-1
acid,
110-100-120
g·L-1),
2
(F2:
60
130-120-150
3
(F3:
30
170-150-130
g·L-1).
Agronomic
traits,
gas
exchange
parameters
leaves
during
tuber
expansion
stage,
components
at
harvest
were
measured,
along
use
each
treatment.
Results
show
that
F1,
F2,
F3
improved
plant
height,
stem
diameter,
aboveground
dry
weight,
SPAD
value,
stomatal
conductance
(Gs),
yield.
Among
these,
F2
significantly
enhanced
accumulation
relative
chlorophyll
content
(SPAD
value)
increased
photosynthesis,
further
efficiency,
resulting
increase
121.29%
34.6%
compared
CK
CF,
respectively.
Therefore,
identified
as
optimal
fertilization
strategy
Xinjiang.
Its
has
been
extended
trials.
Field
results
14.79%
CK,
proving
effectiveness
replacing
fertilizers
enhancing
production.
Agronomy,
Journal Year:
2025,
Volume and Issue:
15(5), P. 1041 - 1041
Published: April 26, 2025
A
hyperspectral
maize
nitrogen
content
prediction
model
is
proposed,
integrating
a
dynamic
spectral–spatiotemporal
attention
mechanism
with
graph
neural
network,
the
aim
of
enhancing
accuracy
and
stability
estimation.
Across
multiple
experiments,
proposed
method
achieved
outstanding
performance
on
test
set,
R2=0.93,
RMSE
0.35,
MAE
0.48,
significantly
outperforming
comparative
models
including
SVM,
RF,
ResNet,
ViT.
In
experiments
conducted
across
different
growth
stages,
best
was
observed
during
grain-filling
stage,
where
R2
reached
0.96.
terms
accuracy,
recall,
precision,
exhibited
an
average
improvement
exceeding
15%,
demonstrating
strong
adaptability
to
temporal
variation
generalization
spatial
conditions.
These
results
provide
robust
technical
support
for
large-scale,
nondestructive
monitoring
in
agricultural
applications.
Agronomy,
Journal Year:
2025,
Volume and Issue:
15(6), P. 1327 - 1327
Published: May 29, 2025
Cotton
root
systems
sustain
photosynthesis
by
nutrient
uptake
and
coordinate
with
above-ground
growth
to
influence
yield.
This
study
explored
the
effects
of
fulvic
acid
(FA)
phosphorus
(P)
fertilizers
on
relationships
between
cotton
photosynthetic
capacity
(CAP)
carbohydrate
metabolism.
A
field
experiment
was
conducted
including
five
treatments:
no
P
fertilizer
(CK),
105
kg
P2O5
ha−1
(P1),
150
(P2),
+
FA
(FP1),
(FP2).
Results
found
that
FP2
showed
most
significant
advantage,
ensuring
a
suitable
leaf
area
index
(LAI)
fractional
interception
photosynthetically
active
radiation
(IPAR)
consequently
maintaining
high
CAP.
Compared
FP2,
FP1
resulted
in
an
increase
boll
loading
system
(BLR)
8.1%
(BCR)
9.3%.
From
peak
flowering
stage
setting
stage,
sucrose
starch
contents
were
6.2–19.2%
26.5–27.9%
lower
than
those
respectively.
Conversely,
fructose
glucose
6.4–10.8%
7.2–8.8%
higher
FP2.
The
reproductive
organ
biomass
increased
11.1%
14.7%
relative
Moreover,
achieved
highest
yield,
8.5%
11.0%
compared
P2
Taken
together,
our
suggests
application
(105
FA)
could
be
proper
fertilization
method
production
saline-alkali
arid
regions.
Frontiers in Plant Science,
Journal Year:
2024,
Volume and Issue:
15
Published: Sept. 19, 2024
Drought
stress
inhibits
oat
growth
and
yield.
The
application
of
fulvic
acid
(FA)
can
improve
the
drought
resistance
oats,
but
corresponding
molecular
mechanism
FA-mediated
remains
unclear.
Here,
we
studied
effects
FA
on
tolerance
leaves
through
physiological,
transcriptomic,
metabolomics
analyses,
identified
FA-induced
genes
metabolites
related
to
tolerance.
Physiological
analysis
showed
that
under
stress,
increased
relative
water
chlorophyll
contents
leaves,
enhanced
activity
antioxidant
enzymes
(SOD,
POD,
PAL,
CAT
4CL),
inhibited
accumulation
malondialdehyde
(MDA),
hydrogen
peroxide
(H
2
O
)
dehydroascorbic
(DHA),
reduced
degree
oxidative
damage
in
improved
promoted
plants.
Transcriptome
metabolite
analyses
revealed
652
differentially
expressed
(DEGs)
571
(DEMs)
FA-treated
stress.
These
DEGs
DEMs
are
involved
a
variety
biological
processes,
such
as
phenylspropanoid
biosynthesis
glutathione
metabolism
pathways.
Additionally,
may
be
regulating
role
phenylpropanoid
In
conclusion,
our
results
suggest
promotes
by
attenuating
membrane
lipid
peroxidation
system,
biosynthesis,
pathways
leaves.
This
study
provides
new
insights
into
complex
mechanisms
which
improves
crops.
