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Characterization of Natural Biostimulants and Their Effect on Soil Properties
Hanzelková, Kateřina ; Bělonožníková, Kateřina (advisor) ; Smrček, Stanislav (referee)
Biostimulants represent an environmentally friendly way of protecting plants and supporting their growth. Here, fermented nettle was characterized in terms of antioxidant properties, protein content, and activities of selected enzymes. Furthermore, this study focused on the effects of biostimulants (fermented nettle and vermicompost) on soil properties. Fermented nettle showed high content of phenolic compounds and high antioxidant capacity. Activity of proteases, as well as acid and alkaline phosphatases was successfully determined in fermented nettle. Alkaline phosphatase activity was significantly higher than that of acid phosphatase. Protease, endo-β-1,3-glucanase, and total peroxidase activities were determined in soils of plants treated with biostimulants - fermented nettle (N), vermicompost (V) - and compared with control (C). All groups of plants were also exposed to drought stress (D). Application of biostimulants did not affect protease activity in watered groups but D groups showed a significant increase in proteolysis. Endo-β-1,3-glucanase activity was higher in the groups treated with biostimulants and drought did not affect the activity. The group VD showed significantly higher total peroxidase activity than other groups. The protein content in groups treated with biostimulants was...
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Effect of selected fertilizer a bioactive preparation on winter oilseed rape production
PAUL, Radim
The goal of this thesis was to establish and evaluate a pilot experiment. The effect of 5 variants with the application of biostimulants on yield-producing elements, yield and oiliness of winter rape seeds was evaluated. No biostimulant was applied in the control variant. In variant 1, 0.5 l of ExelGrow was applied in BBCH phase 34. In variant 2, 5 l of Talisman was applied in BBCH phase 39. In variant 3, 2 l and 3 l of Talisman were applied in BBCH stages 39 and 51. In variant 4, 2 l of Talisman was applied in BBCH phase 39, 3 l of Talisman was applied in BBCH phase 51 and 0.5 l of ExelGrow was applied in BBCH phase 51. The experiment was carried out in the 2020/2021 marketing year on a family farm near the village of Dobkov near city of Chotěboř. The content of nutrients in the dry matter of above-ground biomass was only minimally affected by the individual variants. The actual seed yield was positively affected, with variant 4 (4.14 t*ha-1) achieving the highest yield. The oil content of the seeds was not statistically significantly affected by the variants. Variant 2 reached the highest oil content (42.40 %). Of the monitored yield-generating elements, the weight of a thousand seeds was negatively affected by individual variants, the highest was in the control (5 g). On the contrary, the number of pods on the plant was positively affected with a statistically significant difference (150 pcs) in variant 4. The number of seeds in the pod was not affected by the individual variants (18 - 19 pcs).
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