Effects of different irrigation treatments on dry matter accumulation, allocation and yield of grapes in solar greenhouse
Abstract
Excessive
irrigation
wastes
resources
and
impairs
plant
dry
matter
yield.
The
study
explored
the
effects
of
three
levels
(I1:
65–85%
θ f ,
I2:
60–80%
I3:
55–75%
θ f )
a
fully
irrigated
control
(CK:
70–90%
on
grape
matter,
yield,
resource
use
efficiency
in
solar
greenhouse
from
2023
to
2024.
Results
showed
that
treatments
significantly
affected
accumulation
organs
aboveground
parts,
especially
during
fruit
swelling
maturity
stages.
logistic
model
simulated
accumulation,
with
maximum
theoretical
(A)
being
most
sensitive
water
changes.
I3
treatment
reduced
A
by
12.4-43.04%
stem,
3.80-15.09%
leaf,
3.87–26.45%
fruit,
8.23–35.27%
parts.
Lower
amount
shortened
rapid
growth
stage
duration
(T 2 )
decreased
rate
time
(X max )
(V max )
average
(V avg )
rates.
At
maturity,
lower
promoted
allocation
leaves
fruits
but
Mantel
test
revealed
seven
characteristic
parameters
were
positively
correlated
yield
radiation
(RUE)
(p
<
0.05,
r
≥
0.2).
random
forest
identified
y 3
y 1
(the
gradually
slow
stages)
as
critical
influencing
RUE.
I1
was
optimal
increased
(WUE)
index
7.36
8.37%,
2.78
2.78%
2024,
no
significant
impact
or
RUE
>
0.05).
Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown
Published: March 3, 2025
Language: Английский