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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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