Fish amino acid is prepared from the wastage of fish, which is degraded using full-process enzymatic hydrolysis technology. Fish protein organic liquid fertilizer is a completely natural fertilizer that is high in organic matter, fish protein, peptides, and biological polysaccharides, among other things. It's also a type of functional fertilizer that may be used as a base fertilizer, topdressing, root irrigation, and flushing spray.It has a high amino acid content, is high in peptides, and has a well-balanced nutritional profile, all of which promote crop absorption and utilization. Fish amino acid fertilizer includes organic materials, peptides, and biological polysaccharides, and is often utilized in high-value crops. Generally FAA is applied through foliar spray, 1:600-1000, apply 2-3 times every season.

The biggest feature of fish amino acid fertilizer is to improve crop resistance. The use of fish amino acid fertilizer from the seedling stage can promote early rooting and prevent diseases in the seedling stage. It is used in the early stage of fruit tree germination and has the effects of anti-freezing, anti-flooding, drought, and disease resistance. The early effect is gradual, but the latter complete effect is noticeable. Apply fish amino acid fertilizer as soon as feasible and on a regular basis. The impact will be better if you utilize it sooner. Because fish amino acid fertilizer does not include hormones, the first effect is slow but noticeable in the middle and late phases. Fish Amino acids can’t replace NPK fertilizers. If you mix fish amino acid fertilizer with microbial fertilizer or NPK fertilizers, it will have a much better yield-increasing effect.

The benefit of Fish amino acid are

1. Plants can directly absorb the amino acids and peptides found in fish protein. It can have a direct role in protein synthesis to boost output.

2. Fish amino acids fertilizer may be employed directly in the synthesis of various enzymes in plants, enhancing plant anabolic metabolism, speeding up plant production and development, and causing plants to produce a large yield and mature early.

3. Plants are unable to absorb proteins in their natural state. Proteins are hydrolyzed into different amino acids by a protease released by microbes, which are then absorbed by plants.

4. Beneficial microorganisms may absorb amino acids and peptides at the same time, increasing the quantity of beneficial microorganisms and thereby boosting the soil's ecological environment and ability to retain water and fertilizer.

Reference

https://agfuse.com/article/fish-amino-acid-fertilizer-effect-amp-function-in-agriculture