Liquid Fish Emulsion Fertilizers: Effective, Organic, and Sustainable
Organic growers are more careful about what and where their liquid organic fertilizers come from. Hence, this article discusses how liquid fish emulsions are made. First of, they are mostly made from the Menhaden fish which is not considered a human food source. However this fish is used for making oil and animal feeds. The waste from the production of this fish into oil or animal feed is the ingredient used for making liquid fish fertilizers.
The first step is to cook the fish and to squeeze its juice and oils by pressing. The oil is removed while the leftover solids can be ground and baked into protein meals and fed to animals. The juice of the fish is brought to a boil until it becomes more concentrated and results in a fish emulsion.
A small amount of phosphoric acid is added to the fish emulsion to lower the pH. Lowering the pH makes the liquid fertilizer more acidic, which prevents it from decaying and fermenting into gas. Before phosphoric acid was added in the manufacturing process, containers of fish emulsion were known to burst from fermentation. Because the amount of added phosphoric acid is so small (less than one percent by weight), the product is still considered organic.
Standard composition of organic fish emulsion fertilizers is about 5% Nitrogen, 2% Phosphorous, and 2% Potassium. It also contains micronutrients that are vital for promoting plant growth.
Depending on their proximity to the sea or fish waste sources, many organic growers are daring enough to make their own fish fertilizer emulsions to cut down costs.
Many organic fertilizers are slow acting. Not fish emulsion. The nutrients in fish emulsion are released almost immediately. That’s why it is particularly good for seedlings and transplants–it gives them a jumpstart. Gardeners either water the diluted liquid fertilizer into the soil or spray their plants for a foliar feed.
As with the use of all fertilizers, application instructions should be followed strictly. Remember to dilute it in the recommended percentage to prevent damaging seeds and young plants. Only mix the amount you are going to use that day because after it has been mixed with water its potency will be lost when stored. And keep the mixture away from heat to prevent deterioration. Since its made from fish, brace yourself for the pungent odor but this will disappear in a few days.
Production of liquid fish emulsions fertilizers is environmentally sound from start to finish. Only fish parts that are unused or are considered as waste by fish and feed processing companies are used. Thus, the use of fish emulsions organic fertilizers thus decrease toxins in our food and helps make zero waste possible.