Summer storms and floods will cause disasters to fish ponds. Therefore, farmers need to do preventive work as soon as possible, and timely and effective measures should be taken to recover economic losses after floods.
First, pay close attention to the restoration of aquaculture function After the flood, many ponds will have varying degrees of damage, farmers should promptly clear the ponds, maintenance cages, to minimize the escape of cultured aquatic products. Pond dams after retreating should be raised, widened, reinforced, and reinforced to prevent re-crashing. For mechanical and electrical equipment that is affected by floods, such as aerators, pumps, lighting facilities, and feed processing equipment should also be maintained and maintained as soon as possible to prevent accidents. Due to heavy rainfall and flood entrainment, there are often large amounts of silt in the floodplain and surrounding ponds and major inlets and outfalls, which can be removed in time by mud pumps.
Second, as soon as possible after the release of suitable fish species ponds, farmers should be based on the characteristics of the pond, according to local conditions fill grass carp, carp, carp, squid and other fast-growing fish species, depending on the number of ponds depending on the pond conditions, the general selection of ponds For fish species above 10 cm, the amount of the fish is controlled at 1,500 to 2,000 tails/667 mph. For fishes with less than 50% escaping fish from ponds, fish species may be properly supplemented; ponds with ponds that exceed 50% of the fish ponds may be best used for ponds.
Third, to strengthen the feeding of high-quality feed After the flood, the aquatic animal's constitution is poor, must be scientifically fed high-quality fresh feed. First of all, we must choose fresh, palatable, nutritious and high-quality feeds for the food characteristics of different cultured species. The feed concentrates must be nutritious, the forage must not contain mud and impurities, and the animal feed must be rotted and disinfected. Feeding should be based on concentrate feed, supplemented by green feed, and refined and crudely matched. Feeding quantity should be controlled to be enough for aquatic animals to eat 80%, and avoid feeding too much, so as to avoid deterioration of water quality. Specifically according to the weather, water color, water temperature, aquatic animal activities and feeding conditions as appropriate, increase or decrease, flexible grasp, so that timing, quality, positioning, quantitative feeding. There are conditions to feed more artificial feed with full-priced feeds. This will not only ensure the nutritional needs of fish, and restore constitution in a timely manner, but also reduce the pollution of water bodies, increase the utilization of bait, and promote its healthy growth. Before bleaching, the green feed must be disinfected with bleaching powder. Vitamin C can be added to the compound feed to increase the resistance of aquatic animals to pathogenic factors.
Fourth, pay attention to improving the quality of water sources is an important guarantee for aquaculture. Due to the large amount of rainwater dilution, the water quality of fish ponds is slim, and plankton breeding is slow. It is necessary to strengthen fertilization, cultivate plankton as soon as possible, and start aerators at the same time to quickly decompose and ferment organic matter at the bottom of fish ponds and fertilize water quality. According to different cultured species, appropriate technical measures can be taken. If there is no organic fertilizer, 5 kg of urea can be used, 2.5 kg of phosphate fertilizer can be dissolved in the whole pond, and the whole pond can be splashed to improve the water quality. Biofeeds. For fish ponds where shrimps and crabs are mainly cultivated, the focus is on improving the transparency of the waters. The water color is yellow-green or yellow-brown, and the transparency is controlled at a depth of 40 to 50 cm; the fish ponds are mainly cultured with oysters, clams, and catfishes. The color of the water should be kept green or dark brown, and the transparency should be in the depth of 20 to 30 cm. For fish ponds that are mainly cultured grasses and squid, the water color should be grass green or yellow-brown, and the transparency should be 30 to 40 cm deep.
V. Conscientiously doing a good job in disinfection of ponds Because fish diseases are prone to occur after floods, it is necessary to sterilize ponds, nets, and tools. Disinfection can be done with bleaching powder, strong chlorine sugar, or chlorine (according to the usage standard of the user's manual). The whole pool is splashed. After a week, use quicklime 2010-6 to splash the pond that has not been flooded, and also to change the water. , regular disinfection, disinfection of the general situation once every 15 days. 5 to 7 days after disinfection, micro ecological preparations such as photosynthetic bacteria, Bacillus subtilis, and nitrifying bacteria can be applied to fishponds to improve pond water quality.
6. Beware of floating heads and epidemic outbreaks. Strengthen the patrol ponds and adhere to the early, middle, and evening patrol ponds once. Observe changes in water color, water quality, fish activity, feeding conditions, and whether there are floating heads or morbidities. Remove it in time to prevent deterioration of water quality. In the event of an anaerobic euphoria, immediately turn on the aerator or add new water to avoid flooding. To conduct a comprehensive disease prevention and prevention of the occurrence of bacterial diseases. For pond aquaculture and low-damage aquaculture, dibrain, chlorine dioxide, strong chlorine, double quaternary ammonium salt and other highly effective disinfectants such as iodine can be used for full-scale splashing. The cultured fish, shrimp, and crabs are sterilized at the same time. Add aquatic multi-dimensional, allicin, immune polysaccharides, stress, etc. to feed to improve disease resistance and reduce the incidence of disease. For active ponds or cages, active treatment measures should be taken.
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