A kind of ecological breeding method of Litopenaeus vannamei fish and shrimp polyculture

Abstract

The invention discloses a litopenaeus vannamei and fish mixed culturing ecological breeding method. A pond with brackish water is selected, during a slack winter season, spiral shell harm is removed, filiform algae are cultured in a directed mode, deposit phosphori in the pond bottom are adsorbed and removed, on around the Tomb-sweeping Day in spring, quick lime dry method pond poisoning is carried 20 days before culturing, 10 cm water adding is carried out before fry adding planning, bleaching powder is used for soaking a disinfecting tank bottom for 12 h, 80 cm water adding is carried out, after water adding is completed, oil tea cakes which are soaked by warm water for 24 h in advance are splashed, and organic fertilizer obtained through microbial fermentation is hung at the side of the pond. After water cultivating, young shrimps are subjected to out-of-cage breeding, after seven days, small-specification mixed-culturing fingerlings obtained after salinization are subjected to out-of-cage breeding, on the 35th day, large-specification mixed-culturing fingerlings are subjected to out-of-cage breeding, then the water level is deepened gradually, the water level is controlled to be 1.1 m-1.2 m, in the early period, feeding is carried out 2 times a day, in the medium-later period, feeding is carried out 3 times a day, computing is carried out according to 2%-8% of body weight, breeding is carried out for 80-100 days, and litopenaeus vannamei is harvested. Mixed fishes with the proper matched density are used for eliminating sick and weak shrimps, the infection source of sick shrimps is removed, prawn abnormal group swimming is avoided, sick shrimps are reduced, and the success rate of culturing is improved.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to an ecological breeding method for mixed cultivation of Litopenaeus vannamei fish and shrimp. Background technique [0002] Litopenaeus vannamei Boone (Penaeus vannamei Boone), also known as Penaeus vannamei, is one of the three shrimp species with the highest aquaculture output in the world today, and its aquaculture is the most representative industry in China's aquaculture industry. In recent years, with people's pursuit of high output of Penaeus vannamei, the stocking density has been increasing, the breeding environment has deteriorated, and the disadvantages of high disease incidence have become increasingly prominent. Especially the occurrence of prawn early-mortality syndrome (Early Mortality Syndrome, referred to as EMS) disease has caused a catastrophic blow to the entire prawn industry, and the Litopenaeus vannamei industry has fallen into a trough. The EMS disease...

AI Technical Summary

Problems solved by technology

At present, there have been researches on polyculture of fish and shrimp, such as Chinese patents CN101622962A, CN103430882A, CN102771422A and CN103621448A, etc., which disclose the ecological culture method of polyculture of different aquatic animals and Litopenaeus vannamei for pond culture of fish and shrimp, but the culture mode The exploration of research is ongoing, and healthier farming methods, stable fish and shrimp production and economic benefits are the driving force behind the research

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