(1) High biological value: the protein content of high-quality imported fish meal is more than 60%, some as high as 70%, and the protein content of domestic high-quality fish meal is more than 55%. All kinds of amino acids are high and balanced, so their biological value is also high. They are high quality animal feed for balancing poultry diet.
(2) High energy: fish meal contains high fat, imported fish meal contains about 10% fat; domestic fish meal standard is 10% - 14%, but some up to 15% - 20%. Therefore, the metabolic energy in fish meal is usually 11.7-12.55 MJ / kg for chicken. But its fat is easy to oxidize, which often results in the lack of vitamin A and vitamin E with the oxidation of oil. At the same time, the oxidation of fat warms up, which is one of the reasons for the spontaneous combustion of fish meal.
(3) High calcium and phosphorus content: fish meal contains 3.8% - 7% calcium and 2.76% - 3.5% phosphorus. The better the quality of fish meal, the higher the phosphorus content, the utilization rate of phosphorus is 100%. But during storage, phosphorus is dissociated from chemical decomposition and becomes phosphorus. The second reason why fish meal is prone to spontaneous combustion during storage is that the ignition point of elemental phosphorus is very low and it can spontaneously ignite without open fire.
(4) High content of trace elements: fish meal contains six trace elements commonly used in chickens, especially zinc and selenium. According to the analysis, each kilogram of seafish meal contains 97.5-151 mg of zinc, 213 mg of tuna meal and 60 mg of freshwater fish meal, and 1.5-2.2 mg of selenium and 4-6 mg of tuna meal.
(5) B is rich in vitamins: especially choline and vitamin B2. According to analysis, per kilogram of Peruvian fish meal contains vitamin B27.1 mg, pantothenic acid 9.5 mg, vitamin H390 mg, folic acid 0.22 mg, choline 3978 mg, nicotinic acid 68.8 mg, vitamin B12110 mg.
(6) Contains unknown growth factors: the exact ingredients have not been purified, so it is not named, but its growth-promoting effect is recognized and affirmed.
(7) high digestibility: the digestibility of chicken protein and fat for fish meal was 91%-93% and 78%-91% respectively.
(8) High salt content: the salt content of imported fish meal is about 1.5%-2.5%. The national standard of domestic fish meal is 4% of the first and second class fish meal and 5% of the third class fish meal, but the actual unadulterated fish meal exceeds the standard, some of which are as high as 15%-20%. In recent years, adulterated fish meal mostly has low salt content, and some of the fake fish meal is less than 1%. Because of its high salt content and moisture absorption, fish meal is conducive to the reproduction of bacteria, molds and yeasts, causing temperature rise, often caking and mildewing, and even spontaneous combustion. This is another reason why fish meal is prone to spontaneous combustion during storage.
In conclusion, fish meal is not only a good animal protein feed for balancing protein and amino acid, but also a good feed for balancing minerals, especially trace elements.