Technical Guidelines for Aquaculture in Spring

In spring, the weather is changeable, the water temperature gradually rises, and the temperature difference between day and night is large, which is the key period for aquatic animals to strengthen their physique, prevent diseases, and improve survival rate and quality. In order to ensure stable aquaculture production and orderly market supply, the Ministry of Agriculture and Rural Affairs has studied and proposed technical guidelines for spring aquaculture.

1. Measures during the aquaculture period: During the breeding process of aquatic products, it is necessary to do a good job in the disinfection of fish fertilized eggs, breeding equipment, breeding water and other related work. Take measures such as large-scale biological isolation of external water for aquaculture, primary disinfection sedimentation, secondary disinfection sedimentation, ultraviolet disinfection, removal of organic matter, water storage, etc. to purify aquaculture water, ensure that the water for parent and seedling breeding does not carry pathogens and reduce organic matter, and detect the pathogens and water quality of the water storage before entering the production area. The water storage with pathogenic organisms and substandard water quality cannot enter the production area.

2. Measures during aquaculture: First, increase dissolved oxygen. Turning up the bottom water body will produce harmful substances such as ammonia nitrogen, nitrite and hydrogen sulfide. The frequency of opening the aerator should be increased. The roots blower should be used frequently. The aeration tube at the bottom of the tank should be used to avoid water anoxia caused by water quality deterioration. The second is to reduce the density. Measures such as transferring adult fish from ponds and increasing the number of commercial fish out of ponds should be taken in time to reduce the amount of adult fish in the pond and reduce the density of aquaculture in the pond. Attention shall be paid to avoid fish body injury or stress reaction during operation. Third, rational feeding. For adult fish with high breeding density, appropriately reduce the feeding of bait, and appropriately add feed additives to improve immunity.

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