Research Article
Plant Growth Biostimulants Based on Different Methods of Seaweed Extraction with Water
Table 1
Multielemental composition of raw algal biomass and extracts obtained by boiling and soaking in water.
| Element | Baltic seaweeds (mg/kg d.m.) () | EB () | ES () | Extract obtained by boiling (45 min, 60°C) Ulva reticulata | Extract obtained by boiling Ulva lactuca | Extract obtained by MAE 25°C | Extract obtained by MAE 40°C | Extract obtained by MAE 60°C | [34] | [35] | [25] | mg/L |
| Macroelements | | | | | | | | | Ca | | | | 158 | — | | | | K | | | | 175 | 0.980 | | | | Mg | | | | 108 | 9.28 | | | | Na | | | | 295 | 5.04 | | | | P | | | | — | — | | | | S | | | | — | — | | | |
| Microelements | | | | | | | | | B | | | | — | — | | | | Co | | | | — | 0.201 | | | | Cu | | | | 1.15 | 3.02 | | | | Fe | | | | 5.22 | 0.417 | | | | Mn | | | | — | 0.050 | | | | Mo | | | | — | — | | | | Ni | | | | — | — | | | | Si | | | | — | — | | | | Zn | | | | 1.25 | 1.02 | | | |
| Toxic metals | | | | | | | | | As | | | | — | — | | | | Cd | | <LLD | <LLD | — | — | <LLD | | | Pb | | | | — | — | | | |
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<LLD: below limit of detection.
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