1, choose a good fish pond. Should choose a quiet environment, convenient transportation, close to the water source and urine production pool, the bottom of the pool requires a flat, non-leakage, an area of ​​1.5-2 acres, about 2 meters deep pond is a broodstock cultivation pond.
2, proper stocking. Calculated by broodstock weight, generally 100-150 kg per acre stocking. The stock of grass carp may be slightly larger, and the stock of flowers and white mullet should be less.
3, moderate fertilization. Spring is the stage of gonadal development of fish, and the food intake increases. The broodstock and broodstock ponds are mainly used to strengthen fertilization. The cultivation of broodstock is mainly based on organic fertilizer. The total amount of manure from squid ponds is about 70%, and that of livestock manure is about 30%. The squid pool is mainly cow dung, which generally accounts for 70%. Human feces account for 30%. At the same time as the fish pond is being fertilized, it is best to apply powdered compound feed or bean cake slurry. Fertilize once a week about every week, about 200 kg per mu. The amount should be appropriate, according to the flexibility of pool water, generally to keep the transparency of the pool at 35-45 cm is better, the carp pool water is yellow-green, oil blue is appropriate, the carp pool water to tea brown is better. Give less or no fertilization in the first half of the month before delivery.
4, increase the water temperature. The clear and timely drainage reduces the water level of the fish pond and accelerates the water temperature of the fish pond. The displacement may be about 30 cm lower than the water level of the pond. When rainy days or cold air comes, it is necessary to fill the pool water in advance to slow the cooling of the pool water.
5, reasonable feeding. When the water temperature was at 10°C, the broodstock began feeding and the food intake gradually increased as the water temperature increased. Feeding should be changed from concentrate to green, and feed volume should be increased or decreased according to water temperature and broodstock feeding conditions. Grass carp is generally fed with malt, grain buds and bean cakes in the early spring, supplemented with leafy vegetables and lettuce leaves, feeding 50-100 grams per end per day. Feed should be deposited on a fixed food table. In the later period, the green feed such as ryegrass, aquatic plants and lettuce leaves should be used as the main ingredient, supplemented with concentrated material, the ratio of green material and fine material should be about 20:1, and the daily feeding amount should be 3%-5% of the fish's body weight and should be eaten for 2 hours. Finished degree. Especially feeding malt and lettuce leaves can promote the development of gonads in the broodstock. The green brooding fish pond mainly invests in feeds with high levels of animal protein, such as snails, scorpions, and quail meats. The daily dosage can account for 3% to 5% of the fish's body weight, supplemented by small amounts of bean cake, together with pellet feed, etc. Concentrate feed, daily dosage of 40-60 kg per mu, to eat full. Feeding is generally stopped 15-20 days before induction. When the water temperature rises above 20 °C, it is necessary to pay attention to gradually reduce until the stop cast concentrated material, prevent the pro-fish body to accumulate too much fat, delay gonad maturation and cause dystocia.
6, water quality regulation. The water quality remains fat, live, tender and cool. Before spring feeding, fertilization, fertilization, the old water in the pool should be replaced by half, and new water should be added to maintain the water depth at about 1 meter, which is conducive to increasing the temperature of the pool water and converting the material energy of the pond to promote the growth and development of the broodstock. Spring flushing is also an important measure to promote gonad development in broodstock.é²¢, é³™ brooding ponds are generally flushed twice a month, grass brooding ponds are flushed 2 times a month, each time adding 5-10 cm of water; before puerperium, brooded, brooded broodstock in a week of labor, flushed every 1-2 days 1 Secondly, or to make the water into a microfluidic state, and the broodstock broods flush water once a day for 2-3 hours in the first half of the production period. The entire cultivation process of the grass broodstock pond should keep the water fresh and maintain its transparency. Above 35 cm. The speed of water flow during flushing should be moderate, too much urgency to consume the power of the broodstock, too slow to affect the effect of flushing. If the water supply is insufficient, the original pond water can be pumped back or the adjacent pond water can flush with each other. From the end of April, the pre-stream water stimulation stage begins, once a day for 3 hours.
7, tour pond and disease prevention. Check the pond once a day at dawn and in the evening to check if there is any increase or decrease in the amount of fish eaten and the water is thin and thin to determine the amount of feed and the amount of fertilizer applied. A pan-pool warning was found and the head was severely floating. New water or an aerator must be added immediately. The diseases of broodstock mainly include print disease, red dermatosis, and anchor head rickets. Prevention methods include: (1) Using 1ppm bleaching agent or 2-4ppm Gallic Quanchiposa to prevent printing and red pigment. (2) Injectable gold (chloramphenicol) for the treatment of erythroderma, 5 ml/kg body weight of the diseased fish, and smear the affected area with 1% stearyl carbonate. (3) The treatment of print diseases can be used to scrub the affected area with 1% benzoic acid. (4) Anchor head lice are sprayed and killed with 0.2-0.5ppm 90% crystal trichlorfon. (5) Every two weeks, after the broodstock eats, the food is disinfected with bleach or copper sulphate once, and the amount is about 250 grams.
2, proper stocking. Calculated by broodstock weight, generally 100-150 kg per acre stocking. The stock of grass carp may be slightly larger, and the stock of flowers and white mullet should be less.
3, moderate fertilization. Spring is the stage of gonadal development of fish, and the food intake increases. The broodstock and broodstock ponds are mainly used to strengthen fertilization. The cultivation of broodstock is mainly based on organic fertilizer. The total amount of manure from squid ponds is about 70%, and that of livestock manure is about 30%. The squid pool is mainly cow dung, which generally accounts for 70%. Human feces account for 30%. At the same time as the fish pond is being fertilized, it is best to apply powdered compound feed or bean cake slurry. Fertilize once a week about every week, about 200 kg per mu. The amount should be appropriate, according to the flexibility of pool water, generally to keep the transparency of the pool at 35-45 cm is better, the carp pool water is yellow-green, oil blue is appropriate, the carp pool water to tea brown is better. Give less or no fertilization in the first half of the month before delivery.
4, increase the water temperature. The clear and timely drainage reduces the water level of the fish pond and accelerates the water temperature of the fish pond. The displacement may be about 30 cm lower than the water level of the pond. When rainy days or cold air comes, it is necessary to fill the pool water in advance to slow the cooling of the pool water.
5, reasonable feeding. When the water temperature was at 10°C, the broodstock began feeding and the food intake gradually increased as the water temperature increased. Feeding should be changed from concentrate to green, and feed volume should be increased or decreased according to water temperature and broodstock feeding conditions. Grass carp is generally fed with malt, grain buds and bean cakes in the early spring, supplemented with leafy vegetables and lettuce leaves, feeding 50-100 grams per end per day. Feed should be deposited on a fixed food table. In the later period, the green feed such as ryegrass, aquatic plants and lettuce leaves should be used as the main ingredient, supplemented with concentrated material, the ratio of green material and fine material should be about 20:1, and the daily feeding amount should be 3%-5% of the fish's body weight and should be eaten for 2 hours. Finished degree. Especially feeding malt and lettuce leaves can promote the development of gonads in the broodstock. The green brooding fish pond mainly invests in feeds with high levels of animal protein, such as snails, scorpions, and quail meats. The daily dosage can account for 3% to 5% of the fish's body weight, supplemented by small amounts of bean cake, together with pellet feed, etc. Concentrate feed, daily dosage of 40-60 kg per mu, to eat full. Feeding is generally stopped 15-20 days before induction. When the water temperature rises above 20 °C, it is necessary to pay attention to gradually reduce until the stop cast concentrated material, prevent the pro-fish body to accumulate too much fat, delay gonad maturation and cause dystocia.
6, water quality regulation. The water quality remains fat, live, tender and cool. Before spring feeding, fertilization, fertilization, the old water in the pool should be replaced by half, and new water should be added to maintain the water depth at about 1 meter, which is conducive to increasing the temperature of the pool water and converting the material energy of the pond to promote the growth and development of the broodstock. Spring flushing is also an important measure to promote gonad development in broodstock.é²¢, é³™ brooding ponds are generally flushed twice a month, grass brooding ponds are flushed 2 times a month, each time adding 5-10 cm of water; before puerperium, brooded, brooded broodstock in a week of labor, flushed every 1-2 days 1 Secondly, or to make the water into a microfluidic state, and the broodstock broods flush water once a day for 2-3 hours in the first half of the production period. The entire cultivation process of the grass broodstock pond should keep the water fresh and maintain its transparency. Above 35 cm. The speed of water flow during flushing should be moderate, too much urgency to consume the power of the broodstock, too slow to affect the effect of flushing. If the water supply is insufficient, the original pond water can be pumped back or the adjacent pond water can flush with each other. From the end of April, the pre-stream water stimulation stage begins, once a day for 3 hours.
7, tour pond and disease prevention. Check the pond once a day at dawn and in the evening to check if there is any increase or decrease in the amount of fish eaten and the water is thin and thin to determine the amount of feed and the amount of fertilizer applied. A pan-pool warning was found and the head was severely floating. New water or an aerator must be added immediately. The diseases of broodstock mainly include print disease, red dermatosis, and anchor head rickets. Prevention methods include: (1) Using 1ppm bleaching agent or 2-4ppm Gallic Quanchiposa to prevent printing and red pigment. (2) Injectable gold (chloramphenicol) for the treatment of erythroderma, 5 ml/kg body weight of the diseased fish, and smear the affected area with 1% stearyl carbonate. (3) The treatment of print diseases can be used to scrub the affected area with 1% benzoic acid. (4) Anchor head lice are sprayed and killed with 0.2-0.5ppm 90% crystal trichlorfon. (5) Every two weeks, after the broodstock eats, the food is disinfected with bleach or copper sulphate once, and the amount is about 250 grams.