两种液化蛋白及其在饲料中的应用

IntroductionFish silage has been produced and used as high nutrition protein resource in feed for many years in Nor-way.The main raw materials are fish offals from fish processing industry,dead fish from fish farming factoryand pelagic fish.It is now a successful and profitable industry and benefits environment protection.With therapid growth in fish farming in China,the demands for high quality protein resource are increasing.There isgreat potential for adopting silage technology in China.A…

Two types of fish silage and its use in fish feed

Formic acid silages were prepared from fresh and cooked sprat and squid viscera.Two types of silage were stored at 6,13,20,25,30 and 39℃ for 32 days.Raw material and silage in fresh and after 1,2,3,4,8,16 and 32 days of storage were analyzed.The dry matter,protein,fat and ash in silage reflected the composition of the raw material and were not affected by the different storage temperatures and times.Neither was there any change in amino acid contents.The degree of hydrolysis varied with the temperatures under which the silages were stored and were low in silage than in their aquatic phase respectively.The silages made from cooked raw material showed no changes in hydrolysis during storage.Five diets,in which the including levels of squid offal silage for replacing fish meal as protein resource were 0,5%,10%,20%,30% respectively,were formulated for puffer and flounder growth experiments.The results showed that exchanging part of dietary fish meal with silage improved the growth performance of fish.