Microencapsulated feed for Silurus lanzhouensis larvae and juveniles and preparation method of microencapsulated feed

Abstract

Microencapsulated feed for Silurus lanzhouensis larvae and juveniles is prepared from a premixed powdery core material, a wall material and a surfactant, wherein the premixed powdery core material isprepared from 44-46 parts by weight of fish meal, 34-36 parts by weight of extruded soybean powder, 18 parts by weight of microalgae powder, 1.5 parts by weight of calcium propionate and 0.5-1 part byweight of a thermophilic protease preparation; the wall material is prepared from 260 parts by weight of starch octenylsuccinate, 2000-2300 parts by weight of water and 150-160 parts by weight of anegg white liquid; the surfactant is prepared from 7.5 parts by weight of Span 80, 10 parts by weight of soybean lecithin and 6-8 parts by weight of Tween 80. The invention further provides a preparation method of the microencapsulated feed for the Silurus lanzhouensis larvae and juveniles. By means of compatibility of the microencapsulated feed for the Silurus lanzhouensis larvae and juveniles, uncertain reactions are avoided, and the prepared feed has nutritive equilibrium and good characteristics of proper granularity, good feeding attraction and water stability, high digestive absorption and the like.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a microencapsulated feed for juvenile catfish of Lanzhou catfish and a preparation method thereof. Background technique [0002] Lanzhou catfish (Silurus lanzhouensis Chen), commonly known as the Yellow River catfish, belongs to the order Siluriformes, the family Siluridea, and the genus Silurus. In 1977, Chen Xianglin named it Lanzhou catfish for the first time. [0003] Lanzhou catfish is a native of Ningxia and a large economic fish unique to the middle and upper reaches of the Yellow River. Its meat is tender and delicious, and it has the reputation of "Yellow River catfish and live ginseng". It has high nutritional and economic value. It has been rated as the "Biological Business Card of the Yellow River". However, in recent years, the deterioration of the ecological environment of the Lanzhou catfish habitat and overfishing have led to a sharp decline in the populatio...

AI Technical Summary

Problems solved by technology

However, there are few studies on the nutritional requirements and feed of Siluriformes larvae and juveniles, which are almost blank and relatively lagging behind.

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