Macroalgae as a sustainable biostimulant for crop production according to techno-economic and environmental criteria
Sustainable Production and Consumption,
Journal Year:
2024,
Volume and Issue:
48, P. 169 - 180
Published: May 24, 2024
One
of
the
main
hotspots
in
agricultural
sector
is
related
to
extensive
use
fertilizers
and
pesticides,
which
leads
direct
environmental
impacts,
such
as
eutrophication,
indirect
ones,
energy
demand
associated
with
their
production.
Faced
these
limitations,
biostimulants
has
emerged
a
suitable
effective
strategy
improve
crop
productivity,
avoid
chemicals
promote
more
sustainable
sector.
This
manuscript
addresses
valorization
macroalgae
for
production
cultivation
according
three
possible
scenarios:
steam
autoclaving
(SAE),
boiling
(BE),
supercritical
fluid
extraction
(SFE).
In
order
evaluate
ecological
potential,
both
techno-economic
assessments
have
been
developed,
following
life
cycle
assessment
methodology.
The
results
obtained
show
that,
from
an
point
view,
resources
CO2,
case
SFE
scenario,
makes
significant
contribution
profile.
optimization
process
could
contribute
reduction
impact
range
12
%–41
%,
increases
potential
biostimulant
On
other
hand,
regarding
economic
study,
all
scenarios
are
considered
economically
viable,
since
minimum
selling
price
(MSP)
similar
market
average
obtained.
However,
by
improving
yield
consumption
materials,
MSP
be
reduced
19.81
%.
addition,
this
also
shows
that
application
wheat
contributes
compared
conventional
stimulant.
Language: Английский
A Biostimulant from Kappaphycus alvarezii Enhances the Growth and Development of Basil (Ocimum basilicum L.) Plants
Horticulturae,
Journal Year:
2025,
Volume and Issue:
11(4), P. 424 - 424
Published: April 16, 2025
This
study
evaluated
the
efficacy
and
optimal
concentrations
of
Kappaphycus
alvarezii
biostimulant
from
São
Paulo
(Kal-SP)
Santa
Catarina
(Kal-SC)
for
hydroponic
cultivation
basil
(Ocimum
basilicum).
Basil
plants
were
grown
with
1%,
3%,
5%,
7%
each
extract
using
distilled
water
as
a
control.
The
extracts
applied
via
weekly
foliar
sprays.
Morphological
biochemical
parameters,
in
addition
to
biogenic
amine
profile,
evaluated.
Morphologically,
3%
Kal-SP
increased
plant
height
by
17.1%
length
roots
54.8%,
while
5%
Kal-SC
enhanced
node
number
95.2%
120.2%,
respectively.
Biochemically,
1%
maximized
chlorophyll
carotenoid
content,
5–7%
soluble
sugars,
3–7%
elevated
starch.
Amino
acid
levels
highest
Kal-SC.
profile
was
also
modulated
K.
extracts,
demonstrating
their
ability
influence
compounds
interest.
results
suggest
that
or
higher
these
can
be
beneficially
cultivation,
potential
variations
depending
on
seaweed’s
geographic
origin.
Language: Английский
Water holding capacity, aggregation, respiration, and chemical character of acid soil amended rice straw biochar enriched with different volumes of liquid extract (sap) of Kappapychus alvarezii
Journal of Degraded and Mining Lands Management,
Journal Year:
2024,
Volume and Issue:
12(1), P. 6849 - 6864
Published: Oct. 1, 2024
The
quality
of
acidic
soil
is
determined
by
organic
C
content
produced
from
rice
straw
biochar
in
agriculture.
In
this
context,
liquid
extract
Kappapychus
alvarezii
(K-sap)
used
as
a
enrichment
agent.
Therefore,
research
aimed
to
(i)
analyze
the
character
K-sap
enriched
with
different
volumes,
well
(ii)
evaluate
impact
on
water
holding
capacity,
size
class
distribution,
aggregate
stability
index,
respiration
rate,
and
chemical
characters.
treatment
tested
was
volume
kg-1
biochar,
namely
without
0
mL,
(iii)
500
(iv)
1,000
(v)
1,500
mL.
Each
repeated
three
times
placed
according
randomized
block
design
procedure.
area
covered
K-sap,
pore
size,
amorphous
degree
increased
while
surface
decreased.
addition
mL
released
new
peak
number
associated
aliphatic
aromatic
groups.
proportion
1-2
mm,
carbon
storage,
pH,
total
N,
available
P
K,
exchangeable
base
cations
saturation.
Meanwhile,
concentration
Al3+
H+
were
decreased
solution.
results
showed
that
performance
quality,
ability
store
improved
adding
volume.
Language: Английский
Conversion of Kappaphycus alvarezii macroalgae biomass enriched with fulvic acid into a foliar biostimulant for plant (Oryza sativa L.) growth and stress protection
Chemical and Biological Technologies in Agriculture,
Journal Year:
2024,
Volume and Issue:
11(1)
Published: Nov. 28, 2024
The
incorporation
of
circular
economy
into
agricultural
processes
is
necessary
to
improve
the
efficiency
agronomic
practices
in
future.
biomass
macroalgae
as
well
humic
substances
sustainable
options
for
stimulating
efficient
use
nutrients
plants.
This
study
aimed
evaluate
modes
action
a
potential
plant
biostimulant
composed
an
aqueous
extract
Kappaphycus
alvarezii
seaweed
plus
fulvic
acid
(KAF)
applied
rice
(Oryza
sativa
L.)
leaves.
was
obtained
from
fresh
macroalga
and
extracted
cattle
manure
vermicompost
(FAVC).
Both
fractions
(KAlv-sap
FAVC)
were
characterized
using
1H
NMR.
bioactivity
KAF
evaluated
experiments
with
four
treatments:
control
(foliar
application
water),
FAVC
FAVC),
KAlv-sap
extract),
FA
+
KAlv-sap).
In
rice,
expression
genes
related
K+
N
transport,
plasma
membrane
H+-ATPases,
oxidative
stress
defense
enzymes
evaluated.
Metabolites
N,
K,
P
contents,
photosynthetic
root
morphology,
quantified.
1H-NMR
spectra
showed
that
rich
organic
fragments
such
sugars,
nitrogenous,
aromatic,
aliphatic
compounds
general.
Foliar
resulted
7.1%
19.04%
increase
dry
mass
roots
leaves,
respectively.
These
plants
had
19%
more
11%
total
length.
increased
sheaths
K
contents
by
up
50%
14%,
mechanism
which
triggered
these
changes
seemed
start
improvement
regulation
through
suppression
K+,
H+-ATPase
transporters,
metabolism.
might
become
promotes
growth,
development,
against
abiotic
stresses.
Language: Английский