Outdoor breeding method for penaeus vannamei in pond

Abstract

The invention relates to an outdoor breeding method for penaeus vannamei in a pond. The method comprises the following steps: before young penaeus vannamei is thrown, salinity, pH, total alkalinity and total hardness of a culture water body are adjusted into required ranges, a carbon source is added, then the young penaeus vannamei is thrown, and management is performed. The penaeus vannamei cultured by the method provided by the invention has good growth vigor, and the breeding difficult problems that a water color is not good, ammonia nitrogen and nitrite exceed a standard for a long term, apH value is stayed at a high level or changed greatly, blue-green algae are bred, parasites are too more, a water body is turbid for a long term, pollution is serious, and diseases often occur due toimbalance of carbon and nitrogen in the water body are avoided.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to an outdoor culture method of Penaeus vannamei in a pond. 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 content. This problem has always been the most insurmountable obstacle to the culture of Penaeus vannamei. When Penaeus vannamei 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 v...

AI Technical Summary

Problems solved by technology

When Penaeus vannamei 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 ways to solve this problem. One is to change the water regularly, for example, changing 50-80% of the water every day can solve the problem, but the operation of changing the water is complicated and inconvenient, and the cost is high, which will cause huge pollution to the surrounding environment. 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 reuse of bait can be used to 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 improper management and further pollutes the water body, or the pollution seriously exceeds its load. After a certain period of culture of Penaeus vannamei, the content of ammonia nitrogen, nitrite, and nitrate will still exceed the standard, and it is often a devastating blow