Spring fish pond management puts four
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Disinfection of good clear ponds should be carried out one month before the fry stocking, and the bottom of the drainage and exposure pool should be drained. The lime should be given 150 kg of lime, and then the water should be drained into the pond so that the water depth can reach 50-60 cm. When the water is drained, it should be filtered with a filter to prevent damage. Substances enter the fish ponds to infest the fish seedlings; Depth of water is 10 to 30 cm, 60 to 80 kg of lime are used, and fish ponds have a depth of about 1 meter, and 120 to 150 kg of lime are used for disinfection. This will effectively kill harmful insects, green mud moss, shallow root aquatic plants and pathogenic bacteria. Lime usually disappears about 10 days.
Put the good fry on the fry in the spring. The fry size is best. When the fry is returned, use 1 kg of baking soda, 1 kg of salt, and 50 kg of water to disinfect and then kill pathogens on the body surface and pimple. Then Put the water in the fish pond into the container containing the fry, and let the fry adapt to the water in the pond. After 1 day, put it in a 50-60 cm fish pond.
Put a good fertigation feed on fish ponds for fertilized fish such as oysters and oysters. When the temperature of the water reaches 5°C or more in 10 days before the fish is released, 50 to 100 kg of excrement of urine is fermented in the water surface of the mu. 150 to 250 kilograms to cultivate plankton, so that the fish can eat enough natural food under the pond.
For fish ponds that raise grasses, cockroaches, and other fish, when the water temperature rises by about 10°C, they begin to eat. The water-grass is mainly fed and appropriate feeds such as malt and bean sprouts are added. After the increase in the amount of food, the soybean meal is used. , bran and other feeds, each feeding should be a fixed time, a fixed position. The daily amount of general concentrates can be baited 3 to 5 kg per 100 kilograms of fish. Feeding standards for fodder should be within 4 hours.
Put a good injection of water off early spring water temperature is low, the fish body is smaller, the water of the fish ponds do not fill once, with the feeding fertilizer and fry growth, weather changes and gradually increase the water level, generally every half a month water injection, each added 10 ~15 cm, general water level from April to May can be controlled at about 80 ~ 100 cm.