Fish meal is a kind of feed made from whole fish or fish waste (head, tail, fin, viscera, etc.) by cooking, pressing, drying and crushing. At present, the world's fish meal production is about 7 million tons, the largest production countries are Chile, Peru, Japan, the United States and so on, while Norway, Denmark, South Africa, Iceland and Thailand are also major producers of fish meal. Among them, Chile and Peru have the highest yields. Fish meal industry in China started late, and mostly concentrated in Zhejiang, Guangdong, Shandong, Fujian and other coastal provinces. Fish meal is widely used in China. The imported fish meal comes from Peru.
Nutritional characteristics: The nutritional value of fish meal varies greatly with different species, processing methods and storage conditions. Fish meal, which is widely used in China, refers to pure fish meal made from whole fish as raw material without residue or foreign matter.
1. The crude protein content of fish meal is high, ranging from 40% to 70%. Protein quality is good, biological value is high; rich in a variety of essential amino acids, including lysine, tryptophan, methionine, cystine content is high; arginine content is relatively low; imported fish meal lysine content can be as high as 5%, domestic fish meal about 3% - 3.5%, amino acid balance.
2. Thermal fish meal does not contain cellulose and lignin. The level of available energy depends on the content of crude fat and ash. Fish meal contains 5% - 12% crude fat, generally about 8%, not more than 12%. Crude fat content is too high, although energy value is high, but easy to oxidize rancidity and reduce nutritional value. High ash content also reduces energy value. Fish meal generally contains 5% - 7% calcium and 2.5% - 3.5% phosphorus. Phosphorus mainly exists in the form of calcium phosphate and has a high utilization rate. Under the condition of qualified crude fat content, the metabolic energy of imported fish meal can reach 11.72-12.55MJ/. The metabolic energy of domestic fish meal is 10.25MJ/or higher when the protein content is between 50% and 55%.
3. Vitamin and mineral fish meal are rich in B vitamins, especially vitamin B12 and vitamin B2. Fish meal also contains vitamins A, D, E and other fat-soluble vitamins. The content of calcium and phosphorus in fish meal is very high, and the proportion is suitable. All phosphorus is available phosphorus. Among the trace elements, iron content is high, reaching 1500-2000 mg/, followed by zinc, selenium and zinc, reaching over 100 mg/, selenium content is 3-5 mg/, and containing appropriate arsenic. The iodine content of marine fish is higher.
4. The unknown growth factor fish meal contains four or six growth factors which can stimulate the growth and development of animals.