Response of spring wheat yield to changes in hydrothermal conditions expressed by drought indices
Abstract
This
paper
examines
the
relationship
between
spring
wheat
yield
and
various
moisture/drought
indices.
The
study
utilizes
field
data
of
from
1986
to
2022,
obtained
at
research
station
in
central
forest-steppe
Ob
region.
following
indices
were
analyzed:
Standardized
Precipitation
Index
(SPI),
Evapotranspiration
(SPEI),
Ped’s
drought
index
(S)
(both
considering
soil
moisture
–
ST,R,E
without
it
ST,R),
Selyaninov’s
hydrothermal
coefficient
(HTC)
normalized
HTC
(HTCnorm).
Results
suggest
that
maximum
intensification
levels
planting
as
first
crop
after
fallow,
along
with
moldboard
tillage
contribute
yield.
Yield
is
also
affected
by
abiotic
factors,
primarily
heat-moisture
ratio.
conditions
May
September
varies
depending
on
treatment
levels.
In
May,
regardless
treatment,
third
fallow
shows
greatest
dependence
conditions.
June,
air
temperature
a
limiting
factor,
crops
placed
showing
higher
sensitivity.
July,
significant
correlations
observed
least
one
proved
be
most
informative
for
both
entire
vegetation
period
individual
months;
instances
low
coincided
more
frequently
droughts
identified
compared
other
Correlation
coefficients
(ST,R,E)
than
correlation
indices,
suggesting
its
potential
predicting
yields.
Research Square (Research Square), Год журнала: 2025, Номер unknown
Опубликована: Май 15, 2025
Язык: Английский