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用微生物或工程菌生产的鱼类所需营养物质称为微生物饲料,现介绍如下4种: 1、酵母饲料。国内外应用酵母代替大部或全部鱼粉喂鱼效果显著。酵母含蛋白质46％—65％,营养丰富,生物价和消化率都很好。鲤鱼对酵母中蛋白质消化率可达95％—98％。酵母在鱼饲料中可作为维生素(特别是B族)的来源和必需氨基酸的补充。维生素B_1含量比鱼粉多37—40倍,B_2多5—6.5倍。酵母中含鳞量特别多,而且易被鲤鱼消化,其消化率为95％—98％。酵母体中活性酶的种类、数
Nutrients required for fish produced using microorganisms or engineered bacteria are referred to as microbial feed and are now described as follows: 1. Yeast feed. Yeast at home and abroad to replace most or all of the fish meal feeding effect is significant. Yeast protein 46% -65%, nutrient-rich, biological value and digestibility are good. Carp yeast protein digestibility up to 95% -98%. Yeast can serve as a source of vitamins (especially B) and supplements of essential amino acids in fish feeds. Vitamin B_1 content 37-40 times more than fish meal, B_2 more 5-6.5 times. Yeast with particularly large amount of scales, but also easy to digest carp, the digestibility of 95% -98%. Yeast body active enzyme types, number