The objective of the following three-year small-plot experiments was to determine the impact of
a dose and application date of the biostimulator Mg-Tytanit (MgTi) on the formation of winter
oilseed rape phytomass and its titanium cont ent. In the trial the biostimulant Mg-Tytanit containing
8.5 g of titanium in 1 liter was used. The experiment consisted of 5 treatments: 0 – control
treatment without MgTi; 2xTi0.2 – two applications of MgTi in the dose of 0.2 dm3 ha-1;
3xTi0.2 – three applications of MgTi in the dose of 0.2 dm3 ha-1; 2xTi0.4 – two applications of
MgTi in the dose of 0.4 dm3 ha-1; 3xTi0.4 – three applications of MgTi in the dose of 0.4 dm3 ha-1.
The BS was applied in spring during two or three different growth stages: BBCH 50, BBCH 59,
BBCH 66. The first plant sampling was carried out shortly before the first application of BS
(BBCH 50). The second, third and fourth sampling were taken 2 – 3 weeks after the application
of Mg-Tytanit (BBCH 59, BBCH 66, BBCH 71). The results showed that the biostimulator MgTi,
regardless of its dose and application date, resulted in a higher weight of the aerial and
underground phytomass. All the MgTi applications had impact on the winter oilseed rape yield
increase. The seed yield was increased by 0.3 to 0.63 t ha-1. Higher yields were achieved in the
treatments where MgTi was applied three times in comparison with the treatments, where it
was used twice. The oil content in rape seeds was increased significantly only if MgTi was used
in the total doses 0.8 and 1.2 dm3 ha-1 in the single application dose 0.4 dm3 ha-1. The oil content value was increased by 0.94 % and by 0.82 %. The oil production per hectare was increased
after each use of MgTi, i.e. regardeless of the dose and date of its application. The highest Ti
content in the aerial phytomass was 68.5 mg kg-1 and in the underground phytomass it was
247.1 mg kg-1.
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