Method for culturing loach fries by using loach initial feed biological culture media

Abstract

The invention discloses a method for culturing loach fries by using loach initial feed biological culture media, and relates to an aquaculture technique. The method adopts the following culture medium ingredients in mass percentage: 0.01 to 0.05 percent of rotifer spawns, 20 to 40 percent of bean pulp, 2 to 6 percent of meat and bone meal, 40 to 60 percent of pulverized fermented straws, 10 to 20 percent of fermented chicken manure and 1 to 1.5 percent of composite mineral salts. According to a preparation method, the raw materials are uniformly mixed and pulverized to powder or granular mixtures to be used. According to requirements, no peculiar smell, no foreign taste, no mildew and no foreign matters are generated, and the water content is lower than 17 percent. The method has the advantages that the feed biological culture media are green, safe and pollution-free, the preparation is simple, and the use is convenient; rotifer cultured by the feed biological culture media is palatable for the loach fries, and the biomass is great, and the peak period duration of the rotifer is long; the feed biological culture media are used, the survival rate of the loach fries is obviously improved, the fry cost is reduced, and the scale production requirement of loaches is met.

Description

technical field [0001] The invention relates to aquaculture technology, in particular to a method for cultivating loach seedlings by using a loach open bait biological medium. Background technique [0002] At present, my country's loach farming is still in the lowest stage of the farming model (the breeding factory and farmers purchase small-sized wild loach seedlings from farmers' markets or through other channels, and put them in ponds for temporary breeding). Rely on harvesting of natural seed. [0003] There are serious flaws in the foster care model: [0004] 1) Technical risk [0005] Wild loach seedlings grow and develop in the natural water environment. However, after artificial fishing, transportation, and loading and unloading operations, the young and immature loach seedlings have basically lost their physical strength. In addition, they are not adapted to the pond breeding environment, resulting in a stress response , the survival rate is extremely low; in addi...

AI Technical Summary

Problems solved by technology

[0005] Wild loach seedlings grow and develop in the natural water environment. However, after artificial fishing, transportation, and loading and unloading operations, the young and immature loach seedlings have basically lost their physical strength. In addition, they are not adapted to the pond breeding environment, resulting in a stress response , the survival rate is extremely low; in addition, the farming mode has low technical content, is not recognized by the breeding industry, and belongs to the semi-natural breeding state. will further increase the mortality of loach seedlings

[0006] 2) Disease risk

[0007] The purchased loach seedlings have complex geographical sources, carry pathogens in various natural environments, and are easily infected with each other, resulting in the outbreak of various uncontrollable diseases

[0008] 3) Market risk

[0009] Due to the uneven size and size of the purchased wild loach seedlings, and being raised in this primitive farming mode, the size of the commercial loach produced by breeding is different, and it is difficult to sell at an ideal price

[0010] 4) Manage risk

[0011] Due to the different specifications of loach seedlings and the different living water environment, many management problems have been brought to the later stage of farming, such as feed feeding and use of fish medicines. Meet market consumption needs

[0012] In addition, with the rapid development of the loach breeding industry, relying solely on wild loach seedlings can no longer meet the large-scale farming needs of loach. huge destruction

At present, artificial breeding of loach has been able to obtain fertilization rate in large quantities, but the cultivation technology of loach seedlings is still immature, and the mortality rate in the seedling cultivation stage is extremely high. According to the incomplete statistics of national production, the average survival rate of fish fry is less than 8%.

The immature technology of artificially cultivating loach seedlings limits the development of loach breeding industry

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