This probably seems like a dumb question–fish are organic so why would fish extracts not be organic? Here’s why. Given this fact, fish fertilizer is no better or worse than other types of fertilizer.įish fertilizer has about 2% nitrogen, which is the same as most organic fertilizers compost, manure, and coffee grounds. Nitrogen is the thing that is missing in soils. Garden soils usually have enough P and K and the other minor nutrients. The main thing plants need from fertilizer is a source of nitrogen. I have found no support for the claim that fish fertilizer is better than any other organic fertilizer. Since the large molecules need to be degraded before plants can use them, there is little difference – to the plant – between proteins and oils from fish, cows (manure), or even plants. I have seen no scientific evidence to support the superiority of either process. I think the arguments for or against either process is just marketing hype. it is true that heat will denature proteins, but they need to be denatured for the plants to use them. So the argument that heat in the emulsion process is detrimental, makes no sense. Normally microbes in the soil degrade these to nutrients plants can use. There is great debate between the benefits of emulsion vs hydrolysate–which is better? The reality is that plants can’t use most of the large or even small organic molecules from either process. Fish hydrolysate is the result of using cold processing. Fish emulsion is the end product if the heating process is used. Further treatment can take one of two paths it is either heated or cold processed. These are then treated with various chemicals and enzymes to break down larger organic molecules into nutrients and other small organic molecules. What is the difference between fish emulsion and fish hydrolysate? The difference from a plants point of view is minor, but if you are trying to sell product–there are big differences.įish emulsion and fish hydrolysate start with the left over bits from the fish industry–the parts no one else wants.
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