Method for improving aquaculture yield and benefits of large grass carps

Abstract

The invention relates to the field of aquaculture, in particular to a method for improving aquaculture yield and benefits of large grass carps. The method includes the steps: performing grass carp andintercropped fish polyculture; stocking the grass carps for four times per year and catching the grass carps for four times per year. Stocking time is February, May, July-August and October-Novemberevery year, the specification of each grass carp is 2.5-3 jin, and the density of the grass carps is 350-380 grass carps per mu. Catching time is May, July-August and October-November in the same yearand February in a next year, the specification of each intercropped fish is 5-6 jin, the intercropped fishes are bighead carps, crucians and mud carps, and feed for polyculture is expanded feed. Theaquaculture yield and the benefits of the large grass carps can be effectively improved, and the method is environmentally friendly and is a high-yield, efficient and sustainable aquaculture method.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to a method for increasing the output and benefit of large grass carp aquaculture. Background technique [0002] Grass carp is one of the four major freshwater fishes in my country. In 2017, the national aquaculture output was 5.3456 million tons, accounting for 21% of the total freshwater fish aquaculture output, and it is the largest species of freshwater aquaculture fish. The breeding size of large grass carp is generally 5-6 catties / tail. The supply of large grass carp to Hong Kong and Macau is a regional feature of grass carp farming in the Pearl River Delta region. The general size of seedlings is 2-3 catties / tail. [0003] The larger the size of grass carp, the higher the economic value, the correspondingly longer breeding cycle, and higher requirements for capital, technology and management. At present, the traditional culture method of large grass carp in the Pearl River Delta i...

AI Technical Summary

Problems solved by technology

The present invention overcomes the disadvantages of long cultivation period, low output and poor benefit of large grass carp in the existing cultivation method, and effectively improves the cultivation production and benefit of large grass carp and nested fish at the same time

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