Litopenaeus vannamei freshwater cage culture method

Abstract

The invention discloses a litopenaeus vannamei freshwater cage culture method comprising the steps of cage preparation, cage setting, graded culture, fish variety matching, feed feeding, oxygenation control, and the like. According to the invention, with the controlling over the setting of the cage, the matching of fish varieties, feed feeding frequencies, oxygenation times and the like, the litopenaeus vannamei no longer live in the pond bottom which is rich in decayed matters. Therefore, litopenaeus vannamei disease rate is reduced, and dead and diseased litopenaeus vannamei can be removed in time conveniently, such that disease spreading is prevented. The water quality can be effectively improved, feed utilization rate is improved, and sufficient dissolved oxygen in water is effectively ensured, such that a theoretical dissolved oxygen vulnerability problem is avoided. Also, a plurality of feed stages are alternately arranged in the cage, such that litopenaeus vannamei can live in different water levels in the cage, and culture yield can be improved.

Description

technical field [0001] The invention relates to the field of culture technology of Penaeus vannamei, in particular to a cage culture method of Penaeus vannamei. Background technique [0002] Penaeus vannamei is one of the three high-quality shrimp species with the highest farming output in the world so far. It has the advantages of strong vitality, wide adaptability to salinity and temperature, strong disease resistance, high survival rate, and suitable for high-density farming. . In freshwater aquaculture, Penaeus vannamei has high requirements on water quality. The water temperature suitable for growth is 23°C-32°C, and the adaptable range of pH value of water is 7.3-8.6. When the pH value is lower than 7 or higher than 9.2, The vitality of Penaeus vannamei has decreased; the lowest tolerable dissolved oxygen value is 1.2mg / L, ammonia nitrogen is required to be below 0.2mg / L, nitrite below 0.1mg / L, hydrogen sulfide below 0.05mg / L, and transparency About 30cm, about 40cm ...

AI Technical Summary

Problems solved by technology

At present, in order to one-sidedly pursue high yields, farmers start feeding fertilizers to cultivate biological bait before releasing seedlings. In the middle and later stages of breeding, they are desperately feeding and fertilizing, resulting in corpse sediment, feces, removed shrimp shells, and endless food in the water. Excessive accumulation of bait, etc. has led to continuous deterioration of the aquaculture water environment, increased the difficulty of water quality control, and exacerbated the spread of shrimp diseases, resulting in problems such as dead prawns, low yield, poor quality, high bait coefficient, and high aquaculture costs; Oxygenation measures to solve the problem of dissolved oxygen in water, the effect is poor

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