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鱼类对营养物质的需求和其它动物一样均需求蛋白质、脂肪、糖(碳水化合物)、维生素和无机盐等五大类营养物质。不同种鱼类和同一种鱼的不同生长阶段,对营养物质的需求量不同。本讲介绍主要淡水养殖鱼类对蛋白质、脂肪、糖、维生素及无机盐的需要量。这些资料对构成配合饲料各营养素的适当含量,编制合理配合饲料的配方提供理论依据。一、蛋白质:蛋白质是鱼类生长和维持生命的物质基础。鱼的生长主要是指蛋白质在体内的积累。鱼类对蛋白质的需要量比较高,一般说来是哺乳动物和
The demand for nutrients in fish is the same as that of other animals in the five major categories of nutrients such as protein, fat, sugar (carbohydrates), vitamins and inorganic salts. Different species of fish and the same species of fish at different stages of development, the demand for nutrients is different. This talk describes the requirements for protein, fat, sugar, vitamins and inorganic salts in freshwater cultured fish. These data provide the theoretical basis for formulating the formula of reasonable compound feed with the proper content of each nutrient that constitutes compound feed. First, proteins: Proteins are the material basis for the growth and maintenance of fish. Fish growth mainly refers to the accumulation of protein in the body. The demand for protein from fish is relatively high, generally mammals