Summer is the golden season for fish farming. How to manage fish ponds well in summer?

In summer, the golden season of fish farming, so the management of fish ponds is also particularly important. In summer, the water temperature is higher, the reproduction of bacteria is accelerated, and the growth and metabolism of fish is fast, so the incidence rate increases and the transmission is enhanced. Therefore, summer fish pond management needs to start from the following five aspects.

Fish pond

1. Fertilization

In summer, the growth of fish is exuberant and the oxygen consumption is large, so the amount of feeding is also large. The use of organic fertilizer and inorganic fertilizer is not recommended in summer to reduce pollution. The specific amount of fertilizer application is determined according to the fertilizer degree of pool water, water quality, weather conditions, etc. In general, the transparency of the water in fish ponds is maintained at about 25cm, and the water colors are tea brown, green brown, yellow green and oil cyan. Fertilizing time, choose sunny morning, sprinkle all over the pool. Due to the increase of nitrogen content in fish ponds in summer, water-soluble phosphate fertilizer is selected for fertilization. Calcium superphosphate is generally applied 2 times a month, each time 5 kg per mu. Usually after the application of phosphate fertilizer for 3-5 days, the phytoplankton in the fish pond will peak and the content of ammonia nitrogen will decrease. At this time, according to the requirements of water quality management, new water should be added properly to prevent the water from being too thick.

Second, adjust the water quality

Regular injection of new water can not only bring in oxygen, iron, manganese, silicon and other nutrients lacking in fish ponds, but also dilute organic matter and toxic substances, and restore the balance of fish pond composition. In general, fish ponds should be filled with fresh water 3-4 times a month, about 30cm each time.

3. Bait

It is better to feed 80% full in summer, if too much, due to high water temperature, residual bait accelerate the deterioration of water quality, a large number of pathogens multiply, leading to a variety of fish diseases. If fish eat too much, they are also prone to enteritis. The specific feeding amount should be flexibly controlled according to the weather, water temperature, water quality and the feeding situation of fish.

Fish pond

IV. Anti-floating head

Inspect the pond frequently, before and after dawn, to see if there is a floating head, in the afternoon to watch the feeding of fish, and at sunset to check the eating condition of fish throughout the day and whether there are signs of floating head. Prevent floating head and maintain good water quality. To reduce the stock of fish, for fish ponds with serious floating heads, it is necessary to catch some fish on the market in time. If the water quality of the pond is strong and the plankton is excessive, kill some of them and reduce the consumption of dissolved oxygen. The way to save the floating head of a fish:

1. Inject new water to increase oxygen content. two。 Turn on the aerator and stop feeding and fertilizing. 3. Add 20 kg of salt to 10 kg of yellow mud per mu, mix well with water and sprinkle in the whole pool, or 2.5 kg of raw lime powder, mix it with water and sprinkle first aid all over the pool.

Fifth, prevention and control of fish diseases.

The incidence of fish disease is high in summer, so it is necessary to do a good job in the prevention and control of fish disease.

1. Disinfection: fish species disinfection and water body disinfection before fish pond pre-disinfection and stocking.

two。 In fishing, transportation, stocking and other activities, meticulous operation to prevent fish injuries.

3. Find fish disease, timely symptomatic treatment, the order of medication should be correct, first kill insects and then sterilize.