1, pond preparation. The required pond area is between 1,300 and 2,000 square meters, and the water depth is about 1.50 meters. The water injection is convenient and the water quality is good. There is no weed around the pond. Each pond is disinfected with lime 125--150kg. The fish seedlings are 50 centimeters deep in the first week before the lower pond and 250--400 kg of fermented human and animal manure per mu.
2, fry stocking.
One week after fertilization, when the water is light yellow or light green, the fish is under the pond. If nylon bags are used to transport fry, the nylon bag should be put on the surface of the fish pond for about 1 hour, so that the water temperature in the bag is approximately the same as the water temperature of the pool water. Then the fry is put in a gauze cage for raising and the egg yolk is fed after half an hour. Once the water is full, wait for the fry to eat, then gently turn over the net so that the fry naturally swims into the pond. If the fry arrives, it will be stored in a container such as an indoor water tank for temporary raising in the event of storm or cold weather. The larvae with a density of 100 kg will be released with 100,000 fry, and the egg yolk will be fed after 9 am the next morning. After the water, put the fish into the pool. Per-mu ponds can be stocked with 8-10 million fry.
3, fish breeding. Every morning from 9 to 10 o'clock in the morning and from 2 to 3 o'clock in the afternoon, sprinkle soy milk one at a time. Spread evenly along the edge of the pool. Use 2.50 to 3 kilograms of soybeans per acre per day. After the fish were raised in the pond for 10 days, in addition to pouring soymilk on time every day, at 11 o'clock noon and then on the foot of the pool Zhoutan, throw bean paste 1 times, the amount of fry can be used in the afternoon 4-4-5 hours as the standard.
4, fish seedlings.
In early June, when the fry grows up to a body length of 2.70 cm, they are raised. Before the adoption, they should pull the net to exercise twice, and then put it into the first-year-old fish pond, stocking 20,000 fish per acre. One-year-old species of fish pool area of ​​1300 - 2000 square meters, water depth of 2 meters, good water quality, convenient water injection, before putting the fry, the bottom of the pool should be dredging and exposure. 150 kg of quicklime per acre of fingerling pools, and 0.7 () mg/kg of copper sulfate solution to kill parasites 1 week before the fingerlings, and then 1 mg of bleach containing 30% chlorine / Kg concentration Quanchiposa, kill bacterial pathogens of fish diseases. In mid-July, 800 acres of white pheasants with a length of 5 cm are stocked on each mu. If the fish pond is raised, from the end of June to the beginning of July, when the body length of the fish to be grassed reaches 8 cm, the grass carp is put into a fish pond at a density of 300-400 per acre. After the summer flowers and grass species are bred, the sprinkling of the ground cake or soymilk twice a day is repeated for 1 week, after which the fish cake and duckweed are used for feeding. From mid-June onwards, pelleted feeds and purple duckweed or shredded young grasses will be fed at a fixed location. From mid-August to mid-September, it is the peak period of fish diseases, and the amount of concentrate feed must be reduced by 40%. Feeding should be completed in late September and fish should be kept out of the pond.
5, water quality management. Each aquarium should be equipped with an aerator. During the high temperature season, it will be switched on from 12 o'clock in the evening to 8 o'clock in the next morning, so that the dissolved oxygen in the water can be kept above 4 milligrams per liter. Change the water 15 cm deep every 2-3 days.
6, fish disease prevention and treatment. From mid-June, dipterex powder, bleach, and copper sulphate are used alternately in ponds. Usage: half a month with trichlorfon powder, half a month with bleaching powder, 2 days with copper sulfate 1 times. The dosage is: 2.50 kg of trichlorphon powder 2.50 kg for each acre fish pond, 1 kg bleaching powder containing 80% chlorine, and 400 g copper sulfate.
2, fry stocking.
One week after fertilization, when the water is light yellow or light green, the fish is under the pond. If nylon bags are used to transport fry, the nylon bag should be put on the surface of the fish pond for about 1 hour, so that the water temperature in the bag is approximately the same as the water temperature of the pool water. Then the fry is put in a gauze cage for raising and the egg yolk is fed after half an hour. Once the water is full, wait for the fry to eat, then gently turn over the net so that the fry naturally swims into the pond. If the fry arrives, it will be stored in a container such as an indoor water tank for temporary raising in the event of storm or cold weather. The larvae with a density of 100 kg will be released with 100,000 fry, and the egg yolk will be fed after 9 am the next morning. After the water, put the fish into the pool. Per-mu ponds can be stocked with 8-10 million fry.
3, fish breeding. Every morning from 9 to 10 o'clock in the morning and from 2 to 3 o'clock in the afternoon, sprinkle soy milk one at a time. Spread evenly along the edge of the pool. Use 2.50 to 3 kilograms of soybeans per acre per day. After the fish were raised in the pond for 10 days, in addition to pouring soymilk on time every day, at 11 o'clock noon and then on the foot of the pool Zhoutan, throw bean paste 1 times, the amount of fry can be used in the afternoon 4-4-5 hours as the standard.
4, fish seedlings.
In early June, when the fry grows up to a body length of 2.70 cm, they are raised. Before the adoption, they should pull the net to exercise twice, and then put it into the first-year-old fish pond, stocking 20,000 fish per acre. One-year-old species of fish pool area of ​​1300 - 2000 square meters, water depth of 2 meters, good water quality, convenient water injection, before putting the fry, the bottom of the pool should be dredging and exposure. 150 kg of quicklime per acre of fingerling pools, and 0.7 () mg/kg of copper sulfate solution to kill parasites 1 week before the fingerlings, and then 1 mg of bleach containing 30% chlorine / Kg concentration Quanchiposa, kill bacterial pathogens of fish diseases. In mid-July, 800 acres of white pheasants with a length of 5 cm are stocked on each mu. If the fish pond is raised, from the end of June to the beginning of July, when the body length of the fish to be grassed reaches 8 cm, the grass carp is put into a fish pond at a density of 300-400 per acre. After the summer flowers and grass species are bred, the sprinkling of the ground cake or soymilk twice a day is repeated for 1 week, after which the fish cake and duckweed are used for feeding. From mid-June onwards, pelleted feeds and purple duckweed or shredded young grasses will be fed at a fixed location. From mid-August to mid-September, it is the peak period of fish diseases, and the amount of concentrate feed must be reduced by 40%. Feeding should be completed in late September and fish should be kept out of the pond.
5, water quality management. Each aquarium should be equipped with an aerator. During the high temperature season, it will be switched on from 12 o'clock in the evening to 8 o'clock in the next morning, so that the dissolved oxygen in the water can be kept above 4 milligrams per liter. Change the water 15 cm deep every 2-3 days.
6, fish disease prevention and treatment. From mid-June, dipterex powder, bleach, and copper sulphate are used alternately in ponds. Usage: half a month with trichlorfon powder, half a month with bleaching powder, 2 days with copper sulfate 1 times. The dosage is: 2.50 kg of trichlorphon powder 2.50 kg for each acre fish pond, 1 kg bleaching powder containing 80% chlorine, and 400 g copper sulfate.
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