Method of improving Japanese prawn breeding capacity of pond

Abstract

The present invention discloses a method of improving Japanese prawn breeding capacity of a pond. The method comprises feeding water, applying fertilizer, cultivating bentonic organisms, releasing seedlings and harvesting prawns. Before feeding water, a microporous aeration pipe is laid at the bottom of the pond, and connected with a roots blower. In the culture process, the dissolved oxygen concentration is detected, and an aerator is turned on regularly to keep the dissolved oxygen concentration at 3-7mg / L. When releasing seedlings, the seedling releasing density of the Japanese prawn is 20000 per mu. After the basic feed cultivate at the earlier stage in the pond is finished off, high-quality protein compound feed is thrown in the pond according to the growth stage of the Japanese prawn. When the Japanese prawn grows to 2.8-3.2cm, 4.2-4.8cm long acanthogobius hasta is released by 35-45 per mu. According to the present invention, a high-density Japanese prawn breeding technique under the condition of pond culture in North China region, and the pond seedling releasing density of Japanese prawn is increased from traditional 10000 per mu to 20000 per mu. Besides, the survival rate of the Japanese prawn is guaranteed, and increased breeding yield, reduced breeding cost and disease control are achieved. In short, both yield and efficiency are increased.

Description

technical field [0001] The invention relates to a prawn culture technology, in particular to a method for increasing the holding capacity of pond culture prawns. Background technique [0002] Penaeus japonicus is one of the main cultured species along the northern coast of my country. Due to its short breeding cycle and high benefits, it is increasingly recognized by shrimp farmers. In recent years, the scale of farming has been expanding year by year. However, due to the simple pond culture model, insufficient control ability, and backward production management methods, the increase in pond culture capacity of Penaeus japonicus has stagnated, diseases have occurred frequently, and yield per mu and benefits have declined year by year, which seriously restricts the production of Penaeus japonicus. The market competitiveness of the aquaculture industry has affected the sustainable and healthy development of the industry. [0003] The existing breeding process mainly has the f...

AI Technical Summary

Problems solved by technology

[0004] 1) Dissolved oxygen demand of Penaeus japonicus: Pond culture of Penaeus japonicus in the northern region lacks aeration facilities. Under the condition of low density of 10,000 fish / mu, the pond’s own ecosystem can still meet its dissolved oxygen demand, but at high density of 20,000 fish / mu Under the aquaculture conditions, Penaeus japonicus has the habit of diving into the sand. As the shrimp grows up, especially in high temperature seasons, it is easy to cause hypoxia at the bottom of the pond, and the shrimp will suffer from disease.

[0005] 2) Choice of feed for Penaeus japonicus: In the process of traditional penaeus japonicus culture, more live baits such as blue clams and fresh miscellaneous fish are fed to ensure their growth and development. The amount of water will be greatly increased, and the residue after being ingested by Penaeus japonicus will also increase. Traditional ponds have poor sewage discharge capacity, so the water quality will be greatly deteriorated, and harmful bacteria will easily multiply.

[0006] 3) Disease prevention and control issues

[0007] The yield per mu of Japanese prawns (100 catties / stubble) is too low compared with other shrimp farming species, which seriously weakens its competitiveness in the shrimp farming industry. How to increase the yield per mu under ecological farming conditions has become an urgent problem to be solved