Agriculture Reference
In-Depth Information
sugar content due to implemented disease control depended also largely on hybrids. In three-
years average during the research, variant 3 compared to variant 1, highest increase in sugar
content was achieved with hybrids Belinda (1.91%), Gazeta (1.89%) and Sandor (1.81%),
which in the lowest increase in sugar content was achieved with hybrids Asketa (1.22%),
Boomerang (1.27%) and Colonia KWS (1.40%). It follows that neither the increase in sugar
content within fungicide application does not depend on the characteristics of declared
tolerance to
C. beticola
, also the lowest mean sugar content on treatments without fungicide
application was achieved with three hybrids (Sandor, Belinda and Giraf). With three
fungicide applications in 2012 achieved mean sugar content was about 16.04% with highest
values by following hybrids: Colonia KWS (16.31), Gazeta (16.30%) and Elvis (16.17%).
S
UGAR IN
M
OLASSES
The average sugar content in molasses during the research was about 2.57% per beet
(Table 4), which can be assessed as a good result. This indicator was mostly influenced by
weather characteristics during growing season, then by hybrid, in which the influence of
fungicide application was small. The highest sugar content in molasses per beet (3.20%) was
achieved in 2012, where beets because of unfavourable weather characteristics (high air
temperatures and drought) during the second half of vegetation had disrupted flow of
development, so the sugar beets at harvest were unripe with high content of sodium and
alpha-amino nitrogen. During 2013 in average 1% more sugar was lost compared to 2012.
Hybrids with extremely high sugar content in molasses values were: Gazeta, Asketa, Belinda
and Giraf (3.39% - 3.25%), whereby significantly better results were achieved with hybrid
Colonia KWS (2.68%). The average loss of sugar in molasses per beet in 2010 was about
2.21%, which is a very good result. Highest losses in 2010 were achieved with hybrids
Sandor and Elvis (2.51% and 2.46%), which are still good results.
Sugar Yield
The average pure sugar yield during the research was about 8.58 t ha
-1
(Table 5) with
high variations among years which cannot be evaluated as satisfactorily. Yield variations are
mainly result of extreme weather characteristics, but also of unequal hybrid reactions to
stressful conditions.
Highest pure sugar yield average of about 9.92 t ha
-1
was achieved in 2010 with above-
average amounts of rainfall during the vegetation, whereby the lowest yield average of about
6.33 t ha
-1
was achieved in 2012 with very low amounts of rainfall and high air temperatures
during the vegetation. Compared to other hybrids in the trial, significantly higher pure sugar
yield average during three years of research was achieved with hybrids Colonia KWS (10.25 t
ha
-1
) and Boomerang (9.92 t ha
-1
).
Analyzed by individual years of research, during the most favourable year of research
(2010) significantly higher sugar yields, compared to other hybrids in the trial, were achieved
with hybrids Colonia KWS (12.13t ha
-1
) followed by Boomerang (11.63 t ha
-1
) and Sandor
