Second, water quality control should pay attention to weather changes, and timely control aquaculture water bodies before and after extreme weather such as sudden temperature change, typhoon and rainstorm.
● For the open pond culture mode, four days before the weather changes, prawn feed, fish feed and sugar are used as culture media to propagate probiotics, and the propagation time of probiotics is generally 24 hours;
● 3 days before the weather changes, it is necessary to disinfect the aquaculture water. About 12 hours after water disinfection, the community structure of algae and bacteria was reconstructed by using activated probiotic bacteria solution and algae nutrient salt. For the common Vibrio problems at present, we can rely on the "Three Musketeers of Vibrio" (Youhuling, Youkangling and Youfuling) to deal with them.
● Before the weather changes 1-2 days, new algae and flora will grow rapidly, which will build a more stable ecosystem and effectively improve the ability of aquaculture ponds to cope with the weather changes.
● Strengthen the prevention and management before extreme weather, reasonably control the water depth of the pond, reinforce the dike and hydropower facilities, dredge the emergency canal, and avoid flooding of the pond, breach of the dike and damage to hydropower facilities caused by disastrous weather; Configure a certain reservoir to meet the water demand of aquaculture ponds in hot and dry weather.
Third, feeding management First, we must do a good job in aquatic plant management. Regularly maintain Elodea nuttallii, Hydrilla verticillata, Vallissima, etc. planted in the pond, and timely clean up corrupt aquatic plants to ensure that the aquatic plants are in a good growth state. Second, we must strengthen the management of feeding. According to the weather conditions, water quality, breeding stage and health status, the daily feed feeding amount should be adjusted in time to avoid over-feeding and damaging the water quality of the pond. Youcaoling has played an active role in shrimp culture in many places, and its characteristics of "rooting and strengthening stems, decontamination and turning green" have been widely praised by farmers.
Four, the use of secondary treatment water aquaculture is affected by weather changes, the incidence of pond water discharge, etc., the quality of exogenous water is unstable, which may contain viruses, conditional pathogens and parasites, and the exogenous water should be disinfected before entering the aquaculture pond. It is suggested to adopt secondary treatment and set up two reservoirs. Exogenous water will be disinfected and precipitated after entering the primary reservoir. After two days, the surface water will be introduced into the secondary reservoir for disinfection and aeration again 1-2 days. After the residual chlorine in the water body is removed, the surface water will be introduced into the shrimp culture pond.