Name
Ladatko Valeriy Alexandrovich
Scholastic degree
•
Academic rank
—
Honorary rank
—
Organization, job position
Kuban State Agrarian University
Web site url
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Articles count: 2
The article presents the analysis of variation of daily
mean temperatures for the period 1977-2015. Clear
tendency for their increasing in pre-sowing and
especially in growing period is found. Heat supply of
separate months in pre-sowing period increased in the
row: April-February-January-December-March, and
that of growing period – in a row: May-Juny-JulySeptember-August.
Presence of slight correlation
(from -0,256 to 0,268) of temperatures in winter-spring
months with heat supply of coming spring summer
months is found. It is shown that correlation of rice
yield with temperatures of pre-sowing (DecemberApril)
and growing (May-September) periods varies
from weak to average (from 0,016 to 0,524) with a
tendency to increasing from winter months to summer
ones. Use of analog method made it possible to
estimate roughly the nature of t upcoming growing
season of rice in the current 2016: after the abnormally
warm winter one should expect the value of heat
supply of summer months to be close to normal. In the
physiological sense, such distribution of summer
temperatures is favorable for rice. Use of one of the
most effective forecast methods – smoothing the time
series (method of «moving decades») – made it
possible to evaluate medium-term rhythms of heat
supply of rice growing season and yields. It was found
that after an abnormally high level of heat supply of
the growing season, marked during last decade, we
should expect a decrease in spring and summer
temperatures - the next attack of the "cold" cycle. If
this hypothesis is confirmed, then up to 2020, and later
a natural tendency for decrease in rice yields, arising
from the adverse factors of temperature, will continue
which should also affect the economic efficiency of
the industry as a whole
In the conditions of the two-factor field experiment,
the influence of four methods of incorporating straw in
the soil on the rice yield was studied: plowing, one-,
two- and three-time discs and three ways of
"processing" the straw: embedding in the soil of the
chopped straw in its pure form, together with
compensating nitrogen fertilizer and inoculated stubble
biodestructor Stemix ® Niva. It is shown that the
lowest yield is formed when straw is plowed, while
surface tillage of soil by one-, two- and three-fold
discs significantly increases the grain yield in
comparison with the plow by 2.4, 4.2 and 5.2 c / ha,
respectively. Taking into account that the double
disking provided an almost twice increase in the yield
of the crop and the absence of statistically significant
differences with the triple disking; it is this method of
incorporating the straw that should be considered the
most expedient. The introduction of a compensating
nitrogen fertilizer ensured a reliable increase in yield
by 5.1 and 3.7 centners per hectare in comparison with
the variants with the introduction of straw in pure form
and treatment with biopreparation. Calculation of the
share of the influence of the factors studied on the rice
yield showed that the method for embedding straw
provides 29.9% of the variability of the trait under
study, the method of straw treatment is 36.7%, and the
residual dispersion accounts for 33.4%. Incorporation
of chopped rice straw in the soil together with
compensating nitrogen fertilizer in the amount of 1%
of the mass of straw, by double discing, ensured the
receipt of a conventionally net income of 6940 rubles /
ha, the rate of return - 70.4% and the cost recovery -
1.7 rubles / rub