| 摘要 |
It is intended to provide a feed which is appropriate for enhancing the survival rate of young fry fishes with underdeveloped digestion and absorption functions or promoting the growth of them. It is also intended to obtain a vegetable protein hydrolyzate to be used in this feed. To obtain a low-phytin vegetable protein hydrolyzate, a process for producing the low-phytin vegetable protein hydrolyzate which comprises (a) the step of digesting a protein with the use of a protease and (b) the step of digesting phytic acid with the use of an enzyme digesting phytic acid has been completed. In the case where the vegetable protein is soybean protein, for example, it is preferable that the low-phytin soybean protein hydrolyzate has an average molecular weight of from 200 to 10,000. It is also preferable that the phytic acid content is 0.05% by weight or less (based on dry solid matters). A feed for young fry fishes containing this low-phytin soybean protein hydrolyzate makes it possible to provide a feed for young fry fishes which promotes the growth of young fry fishes and enhances the survival rate. |
