PLoS ONE,
Год журнала:
2024,
Номер
19(12), С. e0315951 - e0315951
Опубликована: Дек. 30, 2024
Empirical
data
on
the
effect
of
plant
density
(PD)
and
length
vegetative
phase
(DVP)
growth,
yield,
cannabinoid
concentration
medicinal
cannabis
(Cannabis
sativa
L.)
are
still
scarce,
leading
to
a
lack
specific
cultivation
recommendations.
We
conducted
two
greenhouse
experiments
investigate
PD
in
range
12-36
plants
m-2
(D-trial)
DVP
1-4
weeks
(V-trial)
morphology,
biomass
growth
individual
organs,
CBD
inflorescence
fractions.
models
for
relationships
between
investigated
traits
PD/DVP
were
created
using
linear
regression
analysis
preceded
by
lack-of-fit
test.
An
increase
led
decrease
yield
per
(p
=
0.02),
whereas
positive
relationship
was
found
0.0001)
0.0002)
m2.
Total
area
yields
D-trial
ranged
from
119
247
g
lowest
highest
PD.
showed
with
an
basis
<
along
most
other
relevant
agronomic
such
as
production,
size
lateral
shoot
length.
V-trial
295
571
DVP.
The
could
be
linked
increased
number
rather
than
size.
In
contrast
expectations,
neither
nor
had
significant
effects
gradient
upper
lower
canopy
layers.
concentrations
inflorescences
layers
reduced
23%
46%
D-trial.
However,
increasing
PD,
proportion
higher-concentrated
fractions
68%,
while
extension
shifted
this
only
marginally
45%
50%.
context
standardized
we
therefore
advocate
high-density
production
systems
that
desired
Agronomy,
Год журнала:
2024,
Номер
14(12), С. 2960 - 2960
Опубликована: Дек. 12, 2024
Due
to
the
typical
production
of
Cannabis
sativa
L.
for
medical
use
in
an
artificial
environment,
it
is
crucial
optimize
environmental
and
nutritional
factors
enhance
cannabinoid
yield
quality.
While
effects
light
intensity
nutrient
composition
on
plant
growth
are
well-documented
various
crops,
there
a
relative
lack
research
specific
L.,
especially
controlled
indoor
environments
where
both
inputs
can
be
precisely
manipulated.
This
analyzes
effect
different
intensities
solutions
growth,
flower
yield,
concentrations
seeded
chemotype
III
cannabis
(high
CBD,
low
THC)
environment.
The
experiment
was
performed
licensed
facility
Czech
Republic.
plants
were
exposed
regimes
during
vegetative
phase
flowering
(light
1
(S1),
photosynthetic
photon
flux
density
(PPFD)
300
µmol/m2/s
phase,
900
2
(S2)
PPFD
500
1300
phase)
nutrition
R1
(fertilizer
1)
R2
2).
Solution
(N-NO3−
131.25
mg/L;
N-NH4+
6.23
P2O5
30.87
K2O
4112.04
CaO
147.99
MgO
45.68
SO42−
45.08
mg/L)
used
whole
cultivation
cycle
(vegetation
flowering).
divided
vegetation
171.26
5.26
65.91
222.79
125.70
78.88
mf/L;
66.94
97.96
5.82
262.66
244.07
138.26
85.21
281.54
mg/L).
aim
this
study
prove
hypothesis
that
will
have
significant
impact
flowers
cannabinoids,
whereas
fertilizers
would
no
effect.
involved
four-week
followed
by
eight-week
phase.
During
phases,
deficiencies
observed
treated
with
either
solution
or
ANOVA
analysis
showed
had
nor
cannabinoids.
Also,
differences
between
groups
S1
S2
2)
did
not
result
visible
stage.
However,
fifth
week
under
higher
(S2—PPFD
µmol/m2/s)
developed
noticeably
larger
denser
than
lower
group
(S1).
also
confirmed
positively
influenced
cannabidiol
(CBD),
tetrahydrocannabinol
(THC),
cannabigerol
(CBG),
cannabichromene
(CBC)
when
increase
concentration
individual
cannabinoids
harvested
product
17–43%.
Nonetheless,
find
stage,
highlighting
phase-specific.
These
results
limited
conditions,
further
needed
explore
their
applicability
other
genotypes.
PLoS ONE,
Год журнала:
2024,
Номер
19(12), С. e0315951 - e0315951
Опубликована: Дек. 30, 2024
Empirical
data
on
the
effect
of
plant
density
(PD)
and
length
vegetative
phase
(DVP)
growth,
yield,
cannabinoid
concentration
medicinal
cannabis
(Cannabis
sativa
L.)
are
still
scarce,
leading
to
a
lack
specific
cultivation
recommendations.
We
conducted
two
greenhouse
experiments
investigate
PD
in
range
12-36
plants
m-2
(D-trial)
DVP
1-4
weeks
(V-trial)
morphology,
biomass
growth
individual
organs,
CBD
inflorescence
fractions.
models
for
relationships
between
investigated
traits
PD/DVP
were
created
using
linear
regression
analysis
preceded
by
lack-of-fit
test.
An
increase
led
decrease
yield
per
(p
=
0.02),
whereas
positive
relationship
was
found
0.0001)
0.0002)
m2.
Total
area
yields
D-trial
ranged
from
119
247
g
lowest
highest
PD.
showed
with
an
basis
<
along
most
other
relevant
agronomic
such
as
production,
size
lateral
shoot
length.
V-trial
295
571
DVP.
The
could
be
linked
increased
number
rather
than
size.
In
contrast
expectations,
neither
nor
had
significant
effects
gradient
upper
lower
canopy
layers.
concentrations
inflorescences
layers
reduced
23%
46%
D-trial.
However,
increasing
PD,
proportion
higher-concentrated
fractions
68%,
while
extension
shifted
this
only
marginally
45%
50%.
context
standardized
we
therefore
advocate
high-density
production
systems
that
desired
