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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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