Is it good to raise Monopterus Albus in cement pond? What are the technical points?

Monopterus Albus has excellent culture biological characteristics, such as tolerance to hypoxia, strong vitality, miscellaneous food habits, low habitat in shallow water, etc., which is suitable for various intensive culture methods, such as courtyard culture, pond culture, rice field culture, cage culture, factory culture and so on. So is it good for Monopterus Albus culture in cement pond? What are the technical points?

What are the advantages and disadvantages of raising Monopterus Albus in cement ponds?

1. The main advantages of cultivating Monopterus Albus in cement ponds are as follows:

The water is changed and silt is removed thoroughly, and the shelf life of the water is long.

There is no dead corner when ② is sprayed with liquid medicine, and it is effective in preventing and treating diseases.

The water temperature of ③ cement pond is often higher than that of soil pond in low temperature season, which is beneficial to prolong the feeding period of ricefield eel, so that the food intake is larger and the growth is faster in the same period.

④ can be used for a long time and can be used for more than ten years or even decades.

⑤ is easy to observe, and the labor intensity of fishing and other operations is small.

2. The disadvantages of cultivating Monopterus Albus in cement ponds are that the investment in building ponds is large, and the buffer capacity to temperature is less than that in soil ponds. In summer, local shading and other measures must be adopted to control the pool water within a safe range.

2. Technical points of Monopterus Albus culture in cement pond

1. Pond preparation: as a large-scale breeding farm, it is best equipped with facilities for the whole culture process, from reproduction to eel seedling cultivation and eel cultivation, so it should be equipped with spawning pond, incubation pond, seedling pond and adult eel culture pond. Spawning ponds generally 5-10m2, hatching ponds 2-10m2, nursery ponds 3-10m2, adult eel ponds more than 10m2; the inner wall of the ponds is required to be smooth, the newly built ponds should be dealkalized, soak in water repeatedly for half a month (completely change the water every two days) or use acetic acid treatment; other cement ponds except hatching ponds should be equipped with anti-escape facilities; it is best to set up bottom oxygen facilities.

2. Cultivation of eel seedlings in nursery ponds: some bricks and tiles can be laid at the bottom of the pond, which can be routinely disinfected, and water quality can be cultivated; newly hatched eel seedlings can be put into ponds in time, and can be reared at the end of the year at about 175px. At the beginning of feeding, it is best to feed earthworms and rotifers or blossom with soymilk. After about 15-30 days, the food was domesticated to a fixed point and set up a bait table, and the bait was gradually replaced by artificial feed (mainly earthworms, maggots, small mixed fish, mussel meat, animal viscera, which can be matched with some rice, noodles, melon peel, etc.). Daily strengthen pond patrol and water quality management, at the same time according to the water color of the application of bottom purification of aquatic products, timely prevention and control of fish diseases.

3, adult eel culture: eel pond bottom spread 30-1000px soil, and grow aquatic plants such as Sagittaria, water peanut, etc.; before stocking, disinfect the whole pond after dissolving with 0.2kg/m2 quicklime; apply organic fertilizer after 3 days, put into disinfection eel species 100,200 / m2 (20-30g/ tail) after 7 days, put 1-2 toads and Loach 0.1-0.2kg/m2 in each pond after domestication, and also put some snails and small miscellaneous fish. Setting up a bait table, feeding in the evening is mainly composed of earthworms, maggots, small miscellaneous fish, clam meat, silkworm pupa, animal viscera and some rice, noodles, melon peel, etc., or special formula feed for rice eel. Adhere to the "four fixed" principle; black light can also be arranged in the pond to attract insects and pig blood to attract flies to lay eggs and maggots to feed eels; daily pond patrol and water quality management are strengthened, and live bacteria are often applied (7-15 days). At the same time, according to the water color of the water, apply clean fish products to prevent and control fish diseases in a timely manner.

4. The cement pool should pay attention to the temperature control: some water hyacinth, water lotus or pingzha are raised on the water surface at high temperature in summer, and the area is controlled below 2 to 3; some melon sheds can also be built on the pool to shade and cool down, and should be withdrawn in time when the water temperature drops in autumn.

5. Fishing: generally, rice field eel can be caught in a cage in late November, with earthworms in it, harvested early in the evening, and caught slowly; it can also be drained from the pond and caught in mud; eel species should be caught more carefully; do not damage or remove the injured eel species when dividing the pond.

6. The newly built large-scale Monopterus Albus cement pool should be developed in the direction of industrialization, especially the characteristics of Monopterus Albus should be fully taken into account when selecting the site. The address should be in a quieter place, where the water source is fully pollution-free, and corresponding supporting facilities such as reservoirs, bait breeding grounds (such as earthworms, Tenebrio Molitor, etc.) should be established.

Third, how to add escape prevention facilities in eel farms?

In order to prevent the rice field eel from sneaking out of the pool and causing damage, it is necessary to add two more blocks at the end of the drain. Generally choose and buy steel wire mesh with a mesh diameter of less than 0.5 cm, which is supported by iron or wood strips and made into a mesh board, which is installed and fixed in the gutter. The main purpose of installing two blocks is to prevent the first net from being blocked by garbage, and there is still a second block that can effectively prevent it from escaping.

Fourth, how to eliminate the alkalinity of the newly built cement pool?

Due to the use of a large amount of cement, the newly built cement pool is very alkaline. If no measures are taken to get rid of it, it will be "wiped out" if it is directly put into Monopterus Albus. To eliminate alkalinity, water immersion is generally used, that is, the pool water is filled, soak for 7-10 days, and then drain the pool water can be used. If it is in urgent need of use, you can also sprinkle 0.5 kg of vinegar or 10 ml of glacial acetic acid per 1 cubic meter of pool water, then soak for 1 day.