Special compound feed for platichthys stellatus pallas adult fish and preparation method thereof

Abstract

The invention discloses a special compound feed for platichthys stellatus pallas adult fish. The compound feed comprises, by weight, 32-40% of fish meal, 8-15% of bean pulp, 5-12% of peanut meal, 6-10% of cotton meal, 5-10% of flour, 2-4% of alpha-starch, 1-3% of cuttlefish visceral meal, 4-7% of fish oil, 3-6% of soya-bean oil, 1-2% of compound vitamin, 1-3% of compound mineral substance, 0.2-0.4% of choline chloride, 0.3-0.7% of lysine, 0.3-0.6% of methionine, 2-3% of calcium dihydrogen phosphate and 0.01-0.02% of phytase. The preparation method comprises steps of: (1) weighing raw materials; (2) mixing main feeds for a first time; (3) crushing the main feeds for a first time; (4) crushing the main feeds by an ultra-micro pulverizer for a second crushing; (5) adding an additive and mixing for a second time; (6) heating and curing; (7) pelletizing; (8) drying; (9) spraying oil; (10) cooling; (11) packaging. The invention employs vegetable protein to substitute part of the fish meal, and raw material proportion and additive amount of choline are adjusted, so as to realize reasonable nutrient composition, promote digestion and absorption of platichthys stellatus pallas and accelerate growth of the platichthys stellatus pallas.

Description

technical field [0001] The invention relates to a feed for aquaculture, in particular to a compound feed specially used for cultivating star-spotted flounder adult fish and a preparation method thereof. Background technique [0002] Star spotted flounder ( Platichthys stellatus , Pallas 1788), also known as the star flounder, belongs to the order Pleuriformes, Plaiceidae, and the genus Chuan Plaice, and is a cold-temperate fish with high economic value. It has the advantages of fast growth, strong disease resistance, small viscera, high meat yield, wide temperature and wide salt, etc., and is suitable for high-density intensive farming. The fish has high nutritional value, unique taste, and basically unchanged meat quality after freezing. It is very popular in domestic and foreign markets. [0003] In recent years, the intensive aquaculture of star spotted flounder has developed rapidly in our country, and the scale and quantity of aquaculture are increasing day by day. D...

AI Technical Summary

Problems solved by technology

Due to the docile temperament and insufficient food intake, the physical properties of the feed require slow sedimentation and high stability in water, but traditional feeds cannot meet this requirement. The results of low feed utilization rate and serious water environment pollution have greatly restricted the healthy and sustainable development of the breeding industry of this species.

At the same time, the quality of the feed is determined by whether the combination of nutritional indicators of the special compound feed for star spotted flounder is reasonable. Excessive levels of nutritional indicators such as protein and fat will not only cause loss and waste of nutrients, but also increase pollution to the breeding environment. On the contrary, if the nutrient level is too low, it will lead to insufficient nutrition of the fish body, slow growth rate, decreased disease resistance, etc.

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