The nutritional characteristics of fish meal: the nutritional value of fish meal depends on the raw materials and processing technology of fish meal.
The common characteristics of its nutrients are:
High biological value: high-quality imported Peruvian fish meal protein content in more than 60%, some as high as 70%; domestic high-quality fish meal protein up to 55%. All kinds of amino acid content is high and balanced, so its biological value is also high, is a balanced poultry diet of high quality animal feed.
High energy: fish meal contains high fat, imported fish meal contains about 10% fat; domestic fish meal standards for 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, often resulting in the lack of vitamin A and vitamin E with the oxidation of fat, and fat oxidation heating, is one of the causes of spontaneous combustion of fish meal.
High calcium and phosphorus content: fish meal contains 3.8% - 7%, phosphorus 2.76% - 3.5%, calcium to phosphorus ratio of 1.4-2:1, the better the quality of fish meal, the higher the phosphorus content, phosphorus utilization rate is 100%. But during storage, phosphorus is dissociated from chemical decomposition and becomes phosphorus. The low ignition point of phosphorus is the second reason why fish meal is easy to spontaneously ignite during storage.
High content of trace elements: fish meal contains six commonly used trace elements, especially zinc and selenium content is the highest. According to the analysis, every kilogram of sea fish meal contains 97.5-151 mg zinc, as high as 213 mg tuna meal, fresh water fish meal is 60 mg; every kilogram of sea fish meal contains 1.5-2.2 mg selenium, as high as 4-6 mg tuna meal.
B is rich in vitamins: it is rich in choline and vitamin B2. According to analysis, every 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.
It contains unknown growth-promoting factors: the exact ingredient has not been purified, so it is not named, but its growth-promoting effect is recognized and affirmed.
High digestibility: the digestibility of chicken protein and fat to fish meal was 91%-93% and 78%-91% respectively.
High salt content: imported fish meal contains about 1.5% - 2.5% salt, domestic fish meal state standards are: 4% of the first two fish meal, 5% of the third fish meal, but the actual non-adulterated fish meal exceeded the standard, some as high as 15% - 20%; and in recent years, adulterated fish meal most of the low salt content, a few false fish meal 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 mold and even natural, which is another reason that fish meal is easy to cause spontaneous combustion during storage.