Patent AU-2020104321-A4 (AU)
Title: Immune-enhanced extruded pellet feed for grass carp and preparation method thereof
Inventor: YE JINYUN
IPC: A23K50/80
Filed: 2020-12-24
Granted: 2021-03-18
Abstract: The present invention belongs to the technical field of fish feed, and discloses 
an immune-enhanced extruded pellet feed for grass carp, Ctenopharyngodon idella 
and a preparation method thereof. The immune-enhanced extruded pellet feed is 
composed of corn meal, fish meal, soybean cake meal, wheat bran, sweet potato 
meal, salt, auxin, calcium hydrophosphate, bentonite, lysine hydrochloride, an 
antioxidant, soybean oil, high-gluten wheat flour, monocalcium phosphate, choline 
chloride, a mildew preventive, natural xanthophyll, premix, Copperleaf herb, 
wormwood, plantain herb, verbena, Chinese gall, Fructus meliae azedarach and a 
feed additive. Due to porosity, a volume of the feed in the present invention is 
increased, so that the feed can float on water. Due to high processing temperature, 
the feed can be well disinfected and sterilized. The feed is partially gelatinized, 
maintains nutrition to the utmost extent, and is easily digested and absorbed by 
fishes, so that a feed conversion ratio can be greatly increased. Moreover, water 
content in the dried feed can be decreased by 6-8 times, and preservation time of 
the feed can be effectively prolonged.
Drawings of Description 
Preparation of basal feed: step 1: step 1: weighing corn meal, fish meal, soybean cake meal, wheat bran, sweet potato 01 
meal and salt; mixing and grinding the materials; adding the materials into a mixer after grinding; and mixing the 
materials to obtain coarsely ground raw materials; step 2: re-grinding the coarsely ground raw materials obtained in 
the step 1; and adding auxin, calcium hydrophosphate, bentonite, lysine hydrochloride and an antioxidant for 
performing secondary mixing to obtain secondary mixed raw materials; step 3: uniformly spraying soybean oil onto 
the surfaces of the secondary mixed raw materials by an oil spray machine to obtain the basal feed for later use 
S102 
Preparation of premix feed: weighing high-gluten flour, monocalcium phosphate, choline chloride, a 
mildew preventive, an antioxidant, natural xanthophylls and premix; and grinding and mixing the various 
components to obtain primary mixed feed; and re-grinding and tempering the primary mixed feed to 
obtain the premix feed for later use; grinding and screening the various components such as the 
high-gluten wheat flour, monocalcium phosphate, choline chloride, the mildew preventive, the 
antioxidant, natural xanthophylls and premix by a sieve of 1.5 mm and then mixing; and then re-grinding 
the primary mixed feed and screening by a 60-80-mesh sieve, and tempering 
Preparation of traditional Chinese medicine premix feed: weighing Copperleafherb, wormwood, plantain 
herb, verbena, Chinese gall and Fructus meliae azedarach; and washing, drying and grinding the 
components into powder to obtain the traditional Chinese medicine premix feed 
Mixing the prepared traditional Chinese medicine premix feed with the basal feed, the premix feed and the feed additive; putting 
the mixed feed into twin-screw feed expander; extruding the mixed raw materials by a feed mould under twin-screw extrusion; 
regulating a rotation speed of a rotary cutting motor until feed pellets of the same size and length were obtained; putting the feed 
pellets into a multilayer oven and drying; uniformly spraying the soybean oil onto the surfaces of the feed pellets by an oil spray 
machine; removing hair and burrs on the surfaces of the pellets; and smoothing the surfaces of the feed pellets to obtain the 
immune-enhanced extruded pellet feed for grass carp. A temperature of the oven is 70°C 
FIG. 1 
1