The effect of adding fish oil to feed

Fish oil is a by-product of fishmeal processing, which is obtained by steaming, pressing and separating fish and its wastes. The main components of fish oil are triglycerides, phosphoglycerides, lipids, fat-soluble vitamins, and protein degradation products. No toxic substances such as mercury, arsenic and lead were detected in marine fish, but potassium, copper, aluminum and cadmium were all lower than the allowable values of hygiene, and pesticide residues were almost zero. Therefore, the quality of fish oil processed with fish and its wastes as oil is reliable.

1. Fish is one of the high-energy substances, with 94 calories per gram of fat, more than twice as much as protein and carbohydrates, and its digestibility is high in animals. Practice has proved that the total utilization rate of adding fish oil to eel bait is more than 90%. After animal absorption, it is mainly converted into energy for its activity consumption, which increases the available energy in feed and reduces part of the protein as energy consumption. it has achieved the purpose of saving protein, increasing feed energy, reducing feed cost and promoting animal growth and development.

two。 Phospholipids in fish oil are indispensable components of animal brain, nerve tissue, bone marrow, heart, liver, egg and spleen, and contribute to the digestion, absorption, transport and formation of lipids, and are also important structural substances of biofilms.

3. Fish oil not only provides long-chain polyunsaturated fatty acids necessary for animals, but also serves as a carrier for fat-soluble vitamins A, D and carotenoids to promote the absorption and utilization of vitamins as fat-soluble substances. Lack of essential fatty acids in animals will lead to growth stagnation, decline of reproductive function, subcutaneous edema and bleeding, body color dimness and other diseases. In particular, it can increase the content of nmur3 fatty acids in diet, and these fatty acids can reduce prostaglandins, thus improve the level of animal antibody production, save the amount of livestock antibiotics, and achieve the role of disease prevention and treatment.

Linoleic acid in fish oil can affect the size of eggs, but has no effect on the oil content of total fat in egg yolk, but affects the level and composition of fat in liver. Linoleic acid is the key factor to control the synthesis of lipoprotein in the liver, and lipoprotein develops into vesicles in the ovary through blood transport, thus controlling the size of eggs. Practice showed that 2.75 grams of linoleic acid per layer significantly increased egg weight. In addition, the addition of fish oil to the feed of laying hens reduces the cholesterol content in eggs by 20%, so that the cholesterol content in the blood of people who eat this egg will not change, while when eating ordinary eggs, cholesterol will increase. During the peak laying period, the laying rate of laying ducks is generally about 80%. After the peak period, the laying rate will drop to about 605. It is reported that this phenomenon is related to insufficient nutrition of fat, vitamin protein and amino acids in feed. Fish oil just makes up for this. If 2% fish oil is added to the diet after the peak laying period, the laying rate can be increased to about 73%, with an average increase of 70% per feather. Adding 3% to 5% fish oil in feed processing can improve feed nutrition, promote biological growth, improve the meat quality of aquaculture fish, livestock and poultry, and prevent animals from having too much fat. In addition, fish oil has a strong fishy smell, with a strong food attraction. In addition, fish oil contains a large number of fat-soluble vitamins An and D, which can meet the requirements of comparison between livestock, poultry and aquatic animals.