Preparation method and feeding method of feed for improving meat quality of genetically improved farmed tilapia

Abstract

The invention discloses a preparation method and a feeding method of a feed for improving meat quality of genetically improved farmed tilapia; the methods comprise the following steps of preparation of the feed, adding of chitosan and feeding of the feed. Due to the adoption of the feed, the contents of threonine, valine, methionine, phenylalanine, isoleucine, leucine and lysine in muscles of adult genetically improved farmed tilapia are all improved to different levels, the increment of phenylalanine, valine, leucine and lysine is the most significant. The content of fat in the muscles has no significant influence, however the content of polyunsaturated fatty acids is increased to some extent, wherein the increment of alpha-linolenic acid, arachidonic acid, EPA and DHA are relatively significant. The added chitosan is the metabolite generated by fermentation of microorganism without antagonism and has the characteristics of being small in molecular weight, easy to absorb, low in cost, and the like. Meanwhile, the chitosan is liquid and is relatively easy to be added and sprayed, the residue in the body of genetically improved farmed tilapia is less, the chitosan is likely to be digested and absorbed, and the requirement of novel green and healthy additive is met.

Description

technical field [0001] The invention belongs to feed formulation technology for aquaculture, and specifically relates to a feed preparation and feeding method capable of improving the content of essential amino acids and polyunsaturated fatty acids in the muscle of Gifu tilapia. Background technique [0002] Fish meat is famous for its tender meat and delicious taste. It has high protein content, low fat content, rich in a variety of essential amino acids and unsaturated fatty acids and other nutrients, and plays an important role in the nutritional needs, health and immune functions of the human body. important role. [0003] Tilapia is often called "chicken in water", which has the advantages of fast growth, strong environmental adaptability, low growth and reproduction requirements, and low demand for nutrient elements in feed. In 2012, China's tilapia aquaculture output reached 1,440,000 tons, ranking first in the world, of which the production of Gifu tilapia accounted...

AI Technical Summary

Problems solved by technology

Deep-sea fish oil has always been an important commercial source of polyunsaturated fatty acids such as C20:5 (EPA) and DHA. However, with the decline of the world's marine fishing industry in recent years, relying solely on the original deep-sea fish oil resources has been unable to meet the growing demand. Therefore, artificially farmed fish has become an important source of polyunsaturated fatty acids in human food

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