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Seaweed extract fermented with molasses

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Seaweed extract fermented with molasses

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Biostimulants Fermentation Mixed (several origins)

Fermentation

Biological transformation of the plant material by microorganisms (yeasts, bacteria) in total or partial absence of oxygen, releasing and transforming active compounds over a longer period than the other techniques (days to weeks).

Process summary

1) Chop the plant material and submerge it in water, in a wide, non-airtight container (to let gases escape). 2) Stir daily during fermentation. 3) Let ferment from several days to several weeks, depending on ambient temperature, until it stops foaming. 4) Strain and dilute before use — the undiluted product can be very concentrated.

See all preparation methods

Ground seaweed fermented for a month with molasses, the diluted liquid of which is sprayed on the leaves. Tested on peanut in Sulu (Philippines) by Mindanao State University with the red seaweed Kappaphycus alvarezii.

Application

Application description: Foliar spray of the liquid diluted in water, once or twice a week until the end of flowering.

Dose: 5% (50 ml per litre of water); the trial tested 5 to 20%, and 5% gave the best results.

Tips

The analysed extract contained 0.30% N, 0.15% P₂O₅ and 2.46% K₂O: it is mainly a source of potassium. Only harvest seaweed where permitted.

Preparation process

1. Rinse the seaweed to remove sand and excess salt, then grind it.
2. Mix it with the molasses (1 kg to 1 L) in a container that closes.
3. Leave to ferment for about a month in the shade.
4. Strain through a fine cloth and keep the liquid.

Ingredients

  • Water ⓘ
  • Molasses ⓘ — 0.264 gal
  • Seaweed ⓘ — 2.205 lb
  • 1 kg of ground seaweed; 1 L of molasses; water for dilution.

Tools and equipment

  • Manual or backpack sprayer
  • Blender
  • 20-litre airtight container
  • Fine cloth for filtering

Preparation time

About 1 month.

Product obtained

Thick dark-brown liquid with a sweet, fermented smell.

Source / Reference

Marajuli, F. S. M. and Bangi, J. C. (2024). “Efficiency of fermented seaweed extract as foliar fertilizer at varying frequency and concentration in peanut (Arachis hypogaea L.) production”. BIOTROPIA 31(1): 76-86: https://journal.biotrop.org/index.php/biotropia/article/download/2064/784 — Ingredient spotted on the Ecoagro technical sheet (Guamúchil, Sinaloa, Mexico). Recipe written in our own words.

Recipe written in our own words by biopreparados.es. Copyright and sources

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Country: Argentina

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