Adjust the water quality into the summer after the temperature rises, pool water should not be too fat, the general pool water transparency control in about 30 cm. For this reason, it is necessary to constantly change the new water according to the cultured species and stocking rate. Normally, change the water once every 10 days, change the water every time by 15 to 20 centimeters, and spray lime water once every half month at a dosage of 15 mg/l. The sweltering weather, fertilizer and fish ponds are easy to flood the pond, and it is necessary to regularly patrol the pool. In accordance with the changes in weather and water color, new water should be added in time and artificial oxygenation measures should be taken.
Sufficient feeding is a season of long-term consumption of fish in summer. This stage must do everything possible to make the fish eat well. To feed the clean bait, the bait is mainly made of green material, supplemented by fine material. Daily feeding amount: Concentrate feed 4 kg to 5 kg per 100 kg of eaten fish, green feed 40 kg to 80 kg per 100 kg of herbivorous fish. The bait should be fresh and daily feeding should be no less than 4 times. At the same time, due to the high temperature, herbivorous fish like to eat cool water-based aquatic grass feed, to make full use of natural resources, so that the rough generation of fine, grass-for-fish.
After the reasonable fertilization temperature rises, the pool water is generally dominated by inorganic fertilizers, with little or no organic fertilizer such as livestock manure. High-yielding fishing ponds may be dominated by phosphate fertilizers and supplemented by nitrogen fertilizers. Fertilizers are generally applied once every 5 days to 7 days. Each mu of urea uses 1 kg to 2 kg of urea and 3 to 4 kg of superphosphate. When applied, the water must be fully dissolved and evenly splashed on the water. If the application of organic fertilizer to fully ferment before maturity, generally every 7 days to 10 days once, each dose of 100 kg to 150 kg per mu.
The integrated disease-prevented fingerlings were soaked with 10 mg/L bleach solution for 15 minutes before stocking, wooden tools were dipped with 5 mg/L bleach solution, and mesh tools were soaked with 8 mg/L copper sulfate solution. Every 10 days or so, 1 mg/L bleaching solution was used to disinfect the food field and the shore. Every 20 days, 0.5 mg/L of copper sulfate and 0.2 mg/L of ferrous sulfate were sprayed to disinfect each time. Months of 100 kg of fish with 0.5 kg of garlic roasted bait, feeding for 3 days to 5 days. The major epidemics of hemorrhagic disease, gill gill disease, enteritis disease, and erythroderma in the summer are the most common. In addition, anchor head lice and Chinese leeches are also common. Therefore, it is necessary to regularly patrol the pool and discover that the illness should be treated with symptomatic medication in a timely manner.
The round catcher is used to reduce the fish density and can be released after mid-September. As the water temperature rises, the fish consumes a large amount of oxygen and fishing should be selected on a cool morning. Be careful to avoid causing fish casualties. The round catcher can put some fresh fish on the market during the off-season, and the density of the fish is more reasonable, and it can fully utilize the potential of the fish to excavate the fish pond.
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