I. Selection and disinfection of ponds

The earthen pond for raising eels should be ventilated and sunny, with sufficient water resources, and the area should not be too large. Planting water hyacinth or water hyacinth with a width of 0.8m ~ 1m around the soil pond and enclosing it with fences or nets can not only prevent eels from escaping, but also provide shade for their growth.

Before stocking, the excessive silt in the land should be removed, the bottom of the pond should be leveled, the ridge and the entrance and exit of the pond should be repaired, and the pond should be cleaned and disinfected with 100 kg ~ 125 kg of quicklime every 100 square meter before the eel is raised in the pond, so as to completely kill wild fish and pests. Then water with a depth of 0.6-0.7m is injected 5-7 days before the eel enters the pond, and the water inlet is filtered by a 60-mesh screen. Finally, apply base fertilizer. Generally, every 1000 square meter, 300-400 kilograms of decomposed pig cow dung is poured, and eel species are released after the water is light green or yellowish brown, so that they can eat enough natural bait after entering the pool. /kloc-deepen the pool water to 1.5m in about 0/5 days.

2. Treatment and release of eel species

The suitable temperature for eel growth is 20℃ ~ 28℃, and it begins to feed when the water temperature is 65438 02℃, so the release time is generally from late February to mid-March. Soak eel seeds in water for 20-30 minutes before putting them in the bag to adapt to the water temperature. Only when the temperature difference between the inside and outside of the bag is less than 5℃ can the bag be opened, and then 2-3 pots of water are poured into the bag with a small pot, so that the eel fry can gradually adapt to the low dissolved oxygen state from the high dissolved oxygen state. At the same time, the eel species should be disinfected before being put into use, and the eel species should be soaked in 0.75 kg ~ 1 kg salt 15 ~ 20 minutes every 50 kg of water.

The released eel varieties should be bluish gray in color, thick in skin, elastic and active in swimming, and the specifications of eel varieties in the same pond should be neat and consistent, otherwise the competition among eels will affect the feeding of individual weak people. The stocking density is generally about 20 grams per 1000 square meter for 4,000 ~ 5,000 eels; About 50 grams can throw 3000 ~ 4000 tails; About 100g can be put in 2000 ~ 3000. At the same time, 50 bighead carp, 30 silver carp and 200 tilapia can be mixed in every 65,438+0,000 square meters soil pond, which can filter plankton, eat feces excreted by eels and purify water quality. On the other hand, it can increase fish production.

Three, feed types and feeding

The artificial breeding of eel mainly depends on special compound feed (available in the market), and 50-60 grams of multivitamins (vitamins A, B, C and E) and 1.5-2 kilograms of cod liver oil are added to every 50 kilograms of special feed (cod liver oil should be stopped when the water temperature is lower than 20℃ or higher than 35℃). Young eels should be added less and adult eels should be added more. If there is a temporary shortage of special feed, animal feed such as small miscellaneous fish, internal organs of livestock and poultry and silkworm chrysalis can be ground and mixed with flour to replace it, and its crude protein content must be above 40%.

Eels are carnivorous fish and greedy. When feeding, we should implement the principle of "four determinations", that is, qualitative, quantitative, timing and positioning. Quality decision: that is, to ensure the quality of feed. The prepared feed should be moderate in hardness (the amount of water added is 1.2 times ~ 1.3 times), fresh and clean, and cannot deteriorate and rot. Quantification: that is, according to the specifications, feeding, digestion, weather, water temperature and water quality of eels, the feeding amount should be appropriate. Generally, the daily feeding amount is 65438+ 0.5% ~ 2.5% of the eel's weight, and it is appropriate to eat it within 12 hours. Timing: The fish is small in size and high in density, and it is fed at 8: 00 am and 4: 00 pm every day 1 time; The size of eel is above 1 00g, and it can be fed1time from 8: 00 to 9: 00 every morning. Positioning: that is, the feed is placed on a fixed food table, and 2 ~ 3 food tables can be set up per 1000 square meter soil pool.

Fourth, daily management and disease prevention.

Patrol the pond every morning and evening to observe the activities and feeding of eels, and check the drain after rain to prevent the fish from escaping. Add fresh water 1 time every 10 day to 15 day at ordinary times, and add fresh water 1 time every 5 days to 7 days in summer and autumn, and the water exchange rate is about 10% of the whole pool. At the same time, pay attention to make the pH value between 7 and 8.5. When the pH value is too high, fresh water should be replaced. If it is too low, adjust it with 1000 cubic quicklime.

The main diseases of eel are red fin disease, water mold, watermelon disease and so on. Spraying 2.5ppm~3ppm ~ 3 ppm furazolidone and 65,438+0 ppm bleaching powder every 20 ~ 30 days for 2 ~ 3 days and 65,438+0 times a day can be controlled. If pond worms and leeches are found in the pond, 450g ~ 500g of crystal trichlorfon can be sprayed on the whole pond for killing every 1000m2.

References:

/doc/yjbl/shfw/snfw/syjs/scyz/content/ 122395 . shtml