Method for relay breeding of Ictalurus punctatus

Abstract

The invention discloses a method for relay breeding of Ictalurus punctatus. The area of a pond ranges from 40 mu to 150 mu. The method mainly comprises the steps of pond preparation, fry stocking, water quality management, aquatic product and fry capturing and the like. According to the method, large-size Ictalurus punctatus fingerlings, silver carp fingerlings and plagiognathops microlepis with proper density and specification are stocked, the ecological niches of the pond are scientifically constructed, environment-friendly water purifying agents such as polyferric sulfate, 20% potassium hydrogen persulfate and EM bacteria are reasonably applied to optimize the water quality of the pond, the occurrence rate of aquatic diseases is reduced, the use amount of fishery medicine is reduced, and the pond ecological environment and aquatic product quality safety are guaranteed; and in the breeding period of recent one year, commodity Ictalurus punctatus with high uniformity and sold specifications and other matched fishes are sold in an off-peak mode, the pond space and production efficiency are fully utilized, and the comprehensive economic benefits and ecological benefits of the pond are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and specifically relates to a method for carrying out two crops of channel catfish relay culture in a pond with an area of ​​40 mu to 150 mu within a culture period of nearly one year. Background technique [0002] In the existing catfish farming model, the breeding cycle generally takes 2.5 to 3 years from catfish fry ("centimeter seedlings") to commercial catfish with standard specifications (tail weight 2.5 catties-3.2 catties). Standard catfish fingerlings (50g / tail) are grown to standard-sized commercial catfish. The breeding cycle generally takes 1.5 to 2 years. The breeding cycle is long, the input cost is high, and the risk of breeding is high; if the breeding cycle is too long, it is not conducive to Farmers adapt to the market consumption situation in a timely manner and quickly adjust the breeding mode, and the situation of high yield but not good harvest often occurs. [0003] In a...

AI Technical Summary

Problems solved by technology

The price of processed goods and stupid goods is easily controlled by the processing enterprises, and the bargaining power of farmers is at a disadvantage

Due to the catfish's predation habit and the feed management level of the farmers, catfish of the above specifications exist in different proportions in the same adult fish breeding pond, and farmers can only catch catfish of standard specifications. The fish are selected for sale, and the rest of the catfish of different specifications can only be sold at a low price as "commodity" catfish, which obviously reduces the comprehensive economic benefits of the breeding ponds