Closed type zero-emission industrialized tilapia culture method

Abstract

The invention relates to a closed type zero-emission industrialized tilapia culture method. The closed type zero-emission industrialized tilapia culture method comprises the following steps: regulating the pH value, total alkalinity and total hardness of a culture water body to required ranges before fry stocking, culturing a denitrification type biological floccules, then carrying out stocking, and carrying out management. The tilapia cultured by using the method provided by the invention grows well; meanwhile, the closed type zero-emission industrialized tilapia culture method provided by the invention avoids culture problems like poor water color, long-term excessiveness of ammonia nitrogen and nitrite, high level or intense change of a pH value, blue-green algae propagation, widespreadparasites, long-term turbidity of a water body, serious pollution and frequent diseases and pests caused by unbalance between carbon and nitrogen.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a closed zero-discharge factory tilapia culture method. Background technique [0002] The protein requirement of aquatic animals in aquaculture is significantly higher than that of mammals, but only about 20-30% of the fed protein is converted into fish catches, most of which cannot be utilized and exist in the aquaculture water body. Generally, C in the aquaculture water body :N is lower than 4.0. Excessive nitrogen will form the most threatening "nitrogen pollution" to the farming system. Its main indicators are excessive ammonia nitrogen, nitrite, and nitrate levels. This problem has always been the most difficult obstacle for industrial tilapia farming. When tilapia is cultured for a period of time, it often encounters the problem of "nitrogen pollution", such as poor water color, long-term excess of ammonia nitrogen and nitrite, high pH value or drastic chan...

AI Technical Summary

Problems solved by technology

When tilapia is cultured for a period of time, it often encounters the problem of "nitrogen pollution", such as poor water color, long-term excessive ammonia nitrogen and nitrite, high pH value or drastic changes, blue-green algae growth, parasite flooding, Long-term turbid water, serious pollution, frequent disease and other breeding problems

[0003] At present, there are two main methods to solve this problem. One is to change the water regularly, for example, 50-80% of the water can be changed every day. It is unsustainable; another method is to often use bacteria to cultivate bioflocs, and artificially add organic carbon substances (such as molasses, glucose, etc.) Increase the number of heterotrophic bacteria in the water body, use microorganisms to assimilate inorganic nitrogen, convert ammonia nitrogen and other nitrogen-containing compounds in the water body into bacterial proteins, and form biological flocs that can be directly ingested by filter-feeding breeding objects, which can solve the problem of spoilage in aquaculture water. The problem of crumbs and feed retention can be realized, and the bait can be reused, which can purify water quality, reduce water exchange, save feed, improve the survival rate of breeding objects and increase production, etc., and can solve the problem of "nitrogen pollution". However, this "nitrogen fixation" Type biofloc either dies due to inadequate management and further pollutes the water body, or the pollution seriously exceeds its load. After a certain period of tilapia farming, the content of ammonia nitrogen, nitrite, and nitrate will still exceed the standard, and it is often a devastating blow