Bio-fermented expanded pellet feed for California bass as well as preparation method thereof

Abstract

The invention discloses a bio-fermented expanded pellet feed for California bass as well as a preparation method thereof. The method comprises the following steps: (1), mixing and crushing basic feedmaterials, transporting the powder into an expander, after steam heating gelatinization, performing extruding, expanding and pelletizing on a product, and drying to obtain expanded pellets of basic feed; and (2), putting the expanded pellets of basic feed into a mixer, spraying probiotic fermentation broth on the expanded pellets of basic feed in the mixer, and packing a mixture into a sealed bagto seal and ferment for 3-5 d after uniformly stirring. The expanded pellets of basic feed are used as culture and fermentation substrates of probiotics, which are not only nutrient sources of fish but also carriers of the probiotics and fermentation metabolites of the probiotics. The bio-fermented expanded pellet feed is acidic, and has an aroma of the metabolites of the probiotics and good palatability; and the expanded pellet feed can not only meet the nutritional requirements of aquatic animals in aquaculture water, but also adjust the water quality, improve water body substrates and control diseases, the water environment is stable, the intestines and stomachs of fish are healthy, and the feed effect is good.

Description

technical field [0001] The invention relates to the technical field of feed, in particular to a biologically fermented puffed granular feed for California perch and a preparation method thereof. Background technique [0002] Water quality and feed quality have a vital impact on the healthy growth of farmed California bass. Traditional California perch farming is fed with extruded pellet feed, which contains as much as 50-55% crude protein, so most of the feed formula is animal raw materials with high protein content, less starchy raw materials, less starch content, and poor puffing effect. Well, feed pellets are fragile and rotten after absorbing water, resulting in waste. When the water quality of the aquaculture water body deteriorates (such as the ammonia nitrogen content is too high, the pH value is too high), chemical substances are often applied to the water body to adjust the water quality. When fish have enteritis, gill rot and other diseases, antibiotics are often ...

AI Technical Summary

Problems solved by technology

Traditional California perch farming is fed with extruded pellet feed, which contains as much as 50-55% crude protein, so most of the feed formula is animal raw materials with high protein content, less starchy raw materials, less starch content, and poor puffing effect. Well, feed pellets are fragile and rotten after absorbing water, resulting in waste

When the water quality of the aquaculture water body deteriorates (such as the ammonia nitrogen content is too high, the pH value is too high), chemical substances are often applied to the water body to adjust the water quality. When fish have enteritis, gill rot and other diseases, antibiotics are often used to treat the disease. Fish, due to the residual pollution of chemical substances, antibiotics and other drugs, endanger the safety of fish products. Therefore, in recent years, the promotion and application of non-residual and safe probiotic preparations are directly put into water or fed with mixing materials. Although it has a certain effect, it increases the workload. and labor costs, and some fermented products of probiotics are quickly dissolved in water and become pollutants