Grass carp, crucian carp, chub and bighead carp mixed breeding method for breeding grass carps mainly

Abstract

The invention discloses a grass carp, crucian carp, chub and bighead carp mixed breeding method for breeding grass carps mainly. The method includes the following steps that a fry breeding pond is arranged; all kinds of fries are put into the pond 2-3 days after being hatched, and stocking density is 8-12 fries per mu; after 15-20 days, summerlings are bred; a big fish pond is arranged, all the kinds of summerlings are stocked, and grass carps account for 50% and are bred until the weight of the fishtail of each grass carp is 100-150 g; 600-800 fries of grass carps with each fishtail being 100-150 g are put per mu, and other aquaculture fishes are put; self-made fodder is put, the pH value of a breeding water body is controlled to be 6.5-8.5, water temperature is controlled to be 12-30 DEGC, the amount of dissolved oxygen is larger than or equal to 6.0 mg / L, ammonia nitrogen is smaller than or equal to 0.05 mg / L, and the fish fries are bred until fish fingerlings reach market specifications. Through the mixed breeding method, the tolerance of the grass carps to heavy metal is improved, and anti-stress capacity is high; intestinal tract villi and intestinal muscle thickness of thegrown grass carps are good, the digestive efficiency of the fishes is improved, and the immunological barrier of the fishes is heightened.

Description

technical field [0001] The invention belongs to the field of aquatic products, and relates to a method for cultivating grass carp, in particular to a method for polyculture of grass carp, silver carp and bighead carp, which mainly raise grass carp. Background technique [0002] In today's aquaculture fishery, many farms use drugs to assist in farming, so many of the farmed fish have drug residues. [0003] Pond aquaculture aquatic products are the main source of aquatic product supply in my country. In recent years, with the development of social economy, people have higher and higher requirements for the quality of aquatic products. However, most of the aquaculture aquatic products, especially freshwater carps There are the problems of earthy smell and bad mouthfeel in the class. [0004] Multi-fish polyculture, making full use of various conditions in the pond, can increase the benefits of farming, but the current farming of crucian carp, silver carp and bighead carp has m...

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Problems solved by technology

[0003] Pond aquaculture aquatic products are the main source of aquatic product supply in my country. In recent years, with the development of society and economy, people have higher and higher requirements for the quality of aquatic products. However, most of the aquaculture aquatic products, especially freshwater carps There are problems of earthy smell and bad taste

[0004] Multi-fish polyculture, making full use of the various conditions of the pond, can increase the benefits of farming, but the current farming of crucian carp, silver carp and bighead carp has many food safety hazards such as drug residues and soil smell

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