Fish culture should do well the "four hurdles" at the beginning of spring.
1. Fertilizer application: when the water temperature of the pond is stable at 8 ℃ ~ 10 ℃ in early spring, fertilizer is applied to cultivate natural bait in the water. The amount of fertilization should be determined according to the fat and thin water quality and the quality of fertilizer, 60 kilograms per mu of human feces and urine, or 100 kilograms of animal manure. If chemical fertilizer is used, the ratio of nitrogen, phosphorus and potassium is 1 ∶ 1 ∶ 0.5. when topdressing, it is crushed first and then sprinkled in the whole pond, with a total dosage of 3 kg / mu and an interval of 5 / 10 days. It is appropriate to keep the water quality of the pond yellowish brown or yellowish green with a transparency of about 30 cm.
Second, bait off: when the water temperature reaches 10 ℃, fish begin to feed and grow. Early spring bait should be based on bean cake, wheat bran, cornmeal and other concentrate feed, fixed point every day, regular feeding, each feeding should be 1.5%-3% of the fish body weight. After that, the amount of bait gradually increased with the increase of water temperature, and it was fed twice a day. At the same time, the pond where grass carp was mainly raised should be fed with an appropriate amount of land and water grass, and the best feeding amount should be 4-6 hours after feeding. The specific amount of bait should also be flexibly controlled according to the water temperature, weather and the feeding situation of fish.
Third, water injection pass: in early spring, due to low water temperature, small fish, less active food intake, the pool water should not be too deep. With the increase of water temperature, the fish body increases and gradually deepens the water level. In early spring, it is best to change the water once, and replace it with 1 per cent of the water in the whole pool. After that, the water level will be injected every 15 days, raising the water level by 10 cm to 15 cm each time, keeping the pond water level about 1 m from March to April, and preventing the inflow of sewage and enemy organisms.
Fourth, disease prevention: the pond should be managed by special personnel, patrol the pond every morning and evening, check the quality of water, and determine the amount of fertilization and bait. Salvage the residual bait in time, keep the pool water clean, and forbid feeding spoiled feed. Regular medicine to prevent fish disease, every 15 days with 1PPm bleach and 0.7PPm copper sulfate solution sprinkled alternately in the whole pool, if found that fish disease should be diagnosed and treated in time.
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How to use fish medicine correctly
Correct use of fish medicine should grasp the following details: 1, identify the disease of different drugs to prevent and treat different fish diseases, the treatment of fish diseases, we should make a correct diagnosis of the disease, the right medicine, in order to play the role of drugs, receive the effect of treatment. Generally speaking, different diseases have different symptoms, but there are also some fish diseases, the symptoms are similar to the same, but the pathogens are different, it is necessary to carefully diagnose and distinguish in order to choose the most effective treatment drugs. 2. Drug performance Fish drugs can be divided into chemicals and medium
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The prospect of Pelteobagrus fulvidraco interculture is good.
Pelteobagrus fulvidraco, also known as Pelteobagrus fulvidraco, etc., is an important economic fish in freshwater culture in China. Pelteobagrus fulvidraco has delicate meat, rich nutrition and delicious taste, and the market demand continues to grow rapidly in recent years. As the production of natural waters and pond culture is very limited, it is difficult to meet the growing market demand, resulting in Pelteobagrus fulvidraco to maintain a high market price for a long time. The pond culture of Pelteobagrus fulvidraco has the advantages of low investment and high income, and the prospect of culture is generally optimistic. The pond where the fish pond condition is set to raise the yellow croaker should choose the water source condition is good, without any pollution.
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