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Využití humátů v kombinaci s bórem ve výživě řepky ozimé
Rzymanek, Jakub
The aim of the thesis was to assess the effect of foliar application of boron (B) together with humate on yield and oil content of rapeseed (Brassica napus L.). For this purpose, a one-year field trial was evaluated. In this trial two different fertilizers containing boron were used. These fertilizers were applied both without and in combination with humate. In each treatment, a total of 300 g of B/ha (in the form of borethanolamine) and humate in a dose of 2 l/ha were applied. In one variant, humate without boron was used, in a total dose of 2 l/ha. The average of two unfertilized control treatments was used for comparison. A significant effect of boron used with humate on the yield of winter rape was reached (highest gain by 7.93%) in comparison to the control. A positive effect on seed yield was also reached by application of boron without humate in B2 treatment (+ 6.83%), which was significant compared to the control and compared to the B1 treatment too. Significant yield effect (+ 2.55%) in comparison to the control was reached also by application of humate without boron. A very small effect of boron fertilization on oil content was found. The highest oil content was reached by the separate use of humate (+ 1.19%). The treatments were also evaluated in terms of economic efficiency. Based on the results of yield obtained and economic efficiency of treatments, the B1 + NF treatment was chosen as the best one.
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Využití přírodních hydroabsorbentů při mimokořenové výživě máku setého
Jelínek, Mojmír
The aim of this thesis was to evaluate the effect of a combination of foliar application of sulphur together with a natural form of superabsorbent polymers (SAP) in the spring poppy variety (Papaver somniferum L.) Onyx. The effect of sulphur application in the form of ammonium thiosulphate and elemental sulphur, both without SAP and in combination with SAP, on crop yield was investigated in a field experiment on a total area of 1.25 ha in the locality of Bedihošt' municipality. The evaluation of the effect was mainly based on hectare yield, then germination and thousand seed weight (HTS) were monitored, the health status of the crop was evaluated and an economic evaluation was made both in terms of total cost and with respect to the application of sulphur and SAP alone. The best results were obtained in the plot where ammonium thiosulphate alone was applied, followed by the combination of ammonium thiosulphate with SAP. The results show a very strong correlation between yield and germination (r = 0.96). In contrast, the effect of SAP was not sufficiently demonstrated in this work. The overall economic evaluation when all costs were included was positive only for the application of ammonium thiosulphate without SAP, all other options were loss making. In a direct comparison of the variants with the calculation of only the effect of sulphur and SAP, the application of ammonium thiosulphate without SAP and with SAP came out positive, while elemental sulphur with SAP and without SAP came out negative.
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