First, remedial technical measures Check the rehabilitation of aquaculture facilities. After the flood, the farmers should immediately check whether the fishery production facilities such as ponds, cages, and fences have been damaged. For the closure of the bursting of fish ponds and flooded dams destroyed by the flood, timely closure of the aquaculture products can be minimized, and the escape of cultured aquatic products can be minimized; for the aquaculture water bodies with severe destruction of production facilities, the number of surplus cultured aquatic products in the cultured water bodies is first judged. Then take appropriate measures to prevent the escape of the remaining farmed fish, shrimp, and crabs (for example, use the 2nd to 3rd floors to block the places where the breeding facilities are destroyed). After the retreat of the flood waters, the damaged aerators, feeders, fishing boats, fishing nets and other fishery production facilities will be repaired. Net cages impacted by floods should be promptly repaired, placed in safe waters, replaced with fish species and resumed production. Ponds and pond ponds after retreating should be raised, widened, reinforced, and reinforced to prevent relapse. Repair roads and power facilities in the breeding area to ensure smooth roads and normal power supply.
Add fish species in a timely manner. The fish species such as grass carp, carp, carp, and triangle carp should be quickly filled and the stocking quantity depends on different conditions. If the proportion of fish escaped from ponds is less than 50%, and fishery species are properly supplemented and the fish escape rate exceeds 50%, ponds should be considered and the farmed fish from the 2 ponds should be cultured in one of the ponds. Tong re-introduced the "Four Home Fish" and other fish species for breeding, fish species specifications choose 8 cm ~ 10 cm or so, the amount of mu control in the 1000 to 1500 tail. For aquaculture water that has been completely escaped by floods, fishery production should be rearranged. The number of stocking should not be too large, it should be put in early, strengthen feeding, and timely market.
Timely regulation of water quality. After the flood, as the temperature and water temperature continue to rise, fish enter a period of rapid growth, which is also a critical period for aquaculture production. After a heavy rain, the pool water in the mountainous ponds generally has a low pH, and it is necessary to regularly apply quicklime to the aquaculture water bodies. Once every 20 days, the amount of mu should be between 20 kg and 30 kg. Soaking is now used to control the quality of the water and it can also be used to kill the rainwater. Into some of the bacteria. The pond uses 200 kg to 300 kg of livestock and manure organic fertilizer per acre to cultivate plankton, and fertilizes water quality. If there is no organic fertilizer, 5 kg of urea per mu can be used, and 2.5 kg of phosphate fertilizer can be dissolved in the whole pond. Fertilizer quality, for the re-feeding of fish species rich in biological feed. The transparency of fish ponds is preferably kept at about 30 cm when stocking. Properly extend the time for opening the aerator. It is generally required to start the aerator at about 13:00~3 o'clock in the afternoon and around midnight. In particular, the boot time of the aerator must be extended under the condition of no wind and no light under the shower. Timely use of beneficial microorganisms and sediment modifiers such as EM bacteria, Huoshuibao, Dichangingjing to improve water quality and sediment quality.
Beware of fish ponds lacking oxygen. In order to prevent flooding, schedule management should be strengthened. In seasons when the weather is changing, pay close attention to the fish's feeding conditions and behavior. Once the signs of hypoxia (fish floating slightly) are found, new water should be injected in time and the aerator should be started.
Grasp the cultivation of autumn and fall seedlings. Since the pond culture area is seriously affected and needs to be supplemented with a large number of fish species, it is necessary to seize the fine weather after the disaster, do a good job of broodstock cultivation, implement autumn and autumn and fall seedlings, and make up for damages, and make up for the losses, and solve the problem of seedling gaps in the next spring.
Second, anti-epidemic technical measures Fish bacterial disease prevention and treatment. After the floods, various bacterial pathogens in the water are prone to breeding, fish diseases are prone to occur, and the main diseases that are easily outbreaks and epidemics are bacterial hemorrhagic disease, gill disease, enteritis disease, etc., which can be regularly used lime, chlorine dioxide, dibromobenzene Because of the use of micro-ecological agents to improve the quality of water, such as the use of microbiological agents to improve the quality of water in the national standard, immune enhancers, probiotics, multi-dimensional, allicin, EM bacteria, Bacillus, Chinese medicine yellow powder, immune polysaccharides, etc. Improve fish digestibility, enhance anti-stress ability and disease resistance; find dead fish and diseased fish to fish in time for harmless treatment.
Prevention of parasitic diseases in fish. The types of parasites vary from season to season, but the main hazard season is in late spring and early summer and late autumn, such as the Chinese sturgeon, etc. There are more protozoa, such as trichomonads, in lean water ponds; There are more crustaceans in the pool, such as anchor heads.
When killing parasites of protozoa (such as Trichoderma, Cryptosporidium, etc.), copper sulfate (content of more than 95%) and ferrous sulfate (0.5+0.2) are generally used to achieve a concentration of 0.7 ppm; crustaceans are killed. (such as Chinese sturgeon, anchor head lice, fish larvae, etc.), the general choice of trichlorfon and pyrethroid fish drugs (such as strong insect net, fish enemies, etc.), can also use copper sulfate or copper sulfate and chrysanthemum Ester mixture fish drugs to remove insects. In general, the prevention and treatment of parasite diseases often require two treatments, or parasitic diseases can easily occur repeatedly.
Third, the feeding and management points pay attention to the scientific feeding of feed, pay attention to the nutrition, quality and palatability of feed, so that fish, crabs, shrimp, etc. can make full use of the growth period of summer and autumn, promote growth, and recover the losses due to flood damages. . Feeding amount control. The amount of bait should be controlled at 80% to 90% satiety. Water temperature is too high (more than 33 °C) should stop feeding, feed more feed. The high protein content of compound feed and the low feed coefficient can not only prevent the occurrence of fish disease, but also reduce the pollution of water bodies. It not only ensures the nutritional requirements of fish, but also improves the utilization rate of food.
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