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大豆磷脂是精炼大豆油的副产品,其分子中含有磷脂酸胆碱,具有促进动物对油脂的消化吸收,提高机体的免疫力,改善肉质等重要的生理功能,是良好的天然饲料添加剂。日本北海道水生动物研究所经过分类试验和数据统计分析,提出了水产饲料中大豆磷脂的最佳添加量。试验用的大豆磷脂,其含水量小于22%、丙酮不溶物大于4．5%、乙醚不溶物小于4%,pH 值小于5．5。大豆磷脂在淡水鱼饲料中的最佳添加量为 4．5%～5．5%,在咸水鱼饲料中的最佳添加量为3．5%～4．0%,在虾类饲料中的最佳添加量为5．0%～6．0%。
Soybean lecithin is a by-product of refined soybean oil, which contains phosphatidic acid choline in its molecule. It is a good natural feed additive that has the important physiological functions of promoting animal digestion and absorption of fat, improving body immunity and improving meat quality. Japan Hokkaido Institute of Aquatic Animal Classification tests and statistical analysis of data, put forward the optimal amount of soybean phospholipids added to aquatic feed. The soy bean phospholipids tested had a moisture content of less than 22%, acetone insoluble content of more than 4.5%, ether insoluble content of less than 4% and pH of less than 5.5. The optimum amount of soybean lecithin in freshwater fish feed was 4.5% ~ 5.5%, and the best addition in saltwater fish feed was 3.5% ~ 4.0%. In the shrimp feed The best dosage is 5.0% ~ 6.0%.