After the flood season, aquaculture 咋 derogation

1

Restoring aquaculture facilities

After the flood, some ponds and cages were damaged. The pool embankment should be quickly rebuilt to repair the cages and net enclosures and resume aquaculture production as soon as possible. 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 flooding and entrainment, there are often large amounts of silt in the floodplains and surrounding ponds. Mud pumps can be used to remove silt from the ponds and main intakes and outfalls, restoring normal pond and river functions.

In the critical period of recovery after the flood, we must adhere to the morning and evening patrol, observe and record aquatic animal activities, food intake, body color and water quality, weather changes, etc., remove diseased aquatic animals in time, check their surface symptoms, and consult experts. Analyze the reasons and take corresponding countermeasures. Deep-seated aquatic animals such as dead fish, concentrated high-temperature treatment or concentrated treatment with high-concentration disinfectants, should not throw dead aquatic animals indiscriminately, insist on the disinfection of fishing tools, utensils, and personnel, and strengthen post-flood fishery public health and health management. Measures to prevent the outbreak or expansion of the disease.

2

Strengthen water quality management

After the flood, the aquaculture water body has a large amount of mud and toxic and harmful substances on the surface. The water body is muddy and has low transparency. In order to prevent the outbreak and spread of the post-disaster epidemic, the ponds, net enclosures, and aquaculture water bodies after water treatment shall be promptly disinfected to prevent bacteria. The occurrence and spread of diseases and viral diseases. Before the disinfection, clean water can be used to clean the water, and then use chlorine dioxide to disinfect. Disinfection can be done with 1 international unit of bleaching powder, 0.1-0.2 IU of strong chlorine sugar or excellent chlorine net Quanchiposa, and then a week later with 20 International Lime Quanchiposa. For ponds that have not been flooded, due to the high temperatures in the summer, the water quality tends to be deteriorated, and the water must be changed frequently, and the disinfectant should be regularly applied. In general, it is used once every two weeks.

Water disinfectants generally include chlorine preparations, iodine preparations, quicklime, and aldehyde preparations. In the prevention and treatment of bacterial diseases, the effects of chlorine preparations and quicklime are significant; when it comes to the control of grass carp fingerlings, the effects of iodine and aldehyde preparations are significant. In order to improve water quality and prevent bacterial gill disease, bleaching powder may be sprayed at a dose of 1 mg per litre; Quan Chloride or chlorine dioxide and Other chlorine preparations may be splashed at a rate of 0.1 to 0.2 mg per litre; Quan Lisheng may use a dose of liter per litre. 20 to 30 milligrams of Quanchiposa. When using quicklime, pay attention to the pH value of the water body. When the pH value is higher than 8.5, it is not recommended to splash lime. Chlorine preparation may be used.

After the flood, the ponds are generally muddy and the water quality is poor. The farmers can take corresponding measures to improve the water quality conditions according to different cultured objects. For ponds such as farmed carp, carp, carp, etc., ponds should be dominated by fertilizers and water; for prawn and crabs, the turbidity of water bodies should be appropriately reduced to improve transparency. About 5 days after disinfecting the pond, micro-ecological agents such as photosynthetic bacteria, Bacillus subtilis, and nitrifying bacteria can be used to improve pond water quality. After the floods, most of the fish are still in a state of stress, which can splash vitamin C or glucose preparations in Quanchipia to relieve the stress response of the farm animals to environmental changes.

3

Increase nutrition levels

After the flood, fish, shrimp, etc. are frightened by wind and waves, and they are prone to stress. At the same time, a change in the physical and chemical indicators of the aquaculture water environment increased the stress response. After the flood, aquatic animals tend to eat less, lack of nutrient intake, physiological disorders of the organism, and the decline of immunity, which can easily cause infections of various pathogenic organisms, increase nutrition, increase stress, and reduce post-disaster deaths.

Continuous storms cause phytoplankton and algae in the water body to be unable to perform normal photosynthesis. In addition, the accumulation of harmful substances in the water, nitrite, etc., will increase the likelihood of inducing algal blooms. It is possible to adjust the quality of the water with the aid of hydrolysis acid and stabilize the water quality. After re-cultivation of algae and algae, 1,000 milliliters of green algae per acre are used, together with the use of algae fertilizers, 100-150 milliliters per mu (1 meter water depth) or 150 meters per mu (1 meter water depth). , so that the body of algae as soon as possible to return to normal conditions.

Ensure that feed is first-in, first-out, and avoid feed storage for too long. When using conventional feeds for feeding, we must pay attention to the principle of "Four Sets", namely: qualitative, quantitative, positioning, timing. After the weather is fine, the amount of feed before the rain can not be immediately restored can be gradually increased according to the ratio of 30%, 50%, 70%, and 100% before the rain. Each proportion is controlled within 1 to 2 days, and the amount of feed is gradually restored. Internally, it restores the body's constitution and eating condition as a whole. When feeding green fodder, disinfect with bleaching powder. When complex feeds such as concentrates are used, complex vitamins can be added to increase the anti-stress response ability of the fish and resistance to pathogen infection.

During this period, aquatic animals have poor physique, ensuring the use of high-quality feed, ensuring nutrient intake, and enhancing body resistance. Can be fed vitamin C, once the amount of 1 gram per kilogram of feed, mixed feeding, 2 to 3 times a day, once every 5 to 7 days. For shrimp aquaculture, it is recommended to use Tongwei shrimp liver, a functional feed that not only satisfies nutrient requirements, but also enhances the anti-stress ability of shrimp and improves body resistance.

4

Prevent and control epidemic diseases

After a heavy rain, aquaculture environment, sudden changes in the aquaculture water body, and a large amount of harmful substances in the bottom of the pond are turned upside down. Stress on the farmed animals is very large. At this time, the stress response of the farmed animals should be reduced, and detoxification stress agents can be used to water 150-200 g/mu. After the water is splashed in the whole pond, or 1 to 3 g of bait is added per kilogram of feed, it is advisable to start the aerator to supplement the dissolved oxygen and to improve the temperature and salinity.

Prompt prevention measures should be taken for ponds that are not diseased. The body water and the bottom of the pond can be disinfected with Dingguan chlorine dioxide. Oral administration of “antibiotic + hepatoprotective drugs” can prevent hemorrhagic diseases in advance; for ponds that have already developed, symptoms of fish death should be considered. To conduct a comprehensive judgment, detoxification of the water body can be carried out first, followed by disinfection and oral administration. Detoxification mainly aims at the death of algal blooms, bottom hydrogen sulfide, and other toxic and harmful substances that are lost after the disaster. The water should be disinfected with Dingguan chlorine dioxide. Can be taken orally anti-stress health care drugs and related conditions antibiotics to kill the body of bacteria + hepatic intestine and health for oral administration, cycle for 5 days.

When planning binning, transfer to the pool, and catching and transporting, anti-stress medications should be fed for a period of time in advance, such as increasing choline, pantothenic acid, niacin, sodium fumarate succinate, Chinese herbal medicine Radix Astragali, and Acanthopanax senticosus etc. to enhance fish body. Anti-stress ability. When restoring fish body physique, it is advisable to take “antibiotic + hepatic intestine and health” orally to prevent it, and then perform routine internal or external health care to stabilize the intestinal tract and liver. Consider taking oral vitamin C, Chinese herbs, and immune polysaccharides to improve the anti-stress and disease resistance of fish and shrimp.

During the restoration of health of aquaculture animals, 2 to 3 grams of intestinal Shunin per kilogram of feed can be added, and 2 to 3 times per day; or 2 to 3 grams of Gandankang can be used for 3 to 5 days to stabilize the intestinal and liver health of aquaculture animals. To prevent large-scale outbreaks of secondary diseases, shrimps can be supplemented with high-stable and easily-reduced vitamin C in feeds.

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