CATDOLL : CATDOLL: Technology of breeding eels in plastic film greenhouses

Technology of eel breeding in plastic film greenhouse:

1. Breeding pond construction

The pond should be built with bricks and cement, with a depth of 40 cm, a width of 1-2 m, and a bank width of 20-40 cm. Two water inlet pipes and two drainage pipes with a diameter of 3-4 cm should be installed at the relative positions of the pond. The water inlet pipe should be at the same height as the bank, one drainage pipe should be at the same height as the bottom of the pond, and one drainage pipe should be 5 cm higher than the bottom of the pond. Metal mesh should be installed at the inlet and drainage pipes to prevent escape. Before stocking the eels, clean the pond, add water, and add fertilizer.

2. Greenhouse construction

The plastic greenhouse is installed according to the method of setting up vegetable greenhouses. There are two structures: single-layer and double-layer. The material can be bamboo poles. If conditions permit, steel structure can be used. In addition, an appropriate amount of straw is required and covered on the plastic shed in winter to keep warm.

3. Eel stocking

The eels released are required to be strong, free of disease and injury, and swim actively. The sizes of the eels in each pond should be roughly the same. They can be released all at once or as they are collected. However, they must be soaked and disinfected before releasing (soaked in 2-4% salt water for 5-10 minutes). The density is about 2-3 pounds per square meter of water. As the stocking amount increases and the fish weight increases, the pond water can be deepened to 50-70 centimeters.

4. Feeding

After 2-3 days of stocking, chop up earthworms, snails, clams, frog meat, etc., put them in the feeding table for training, and increase the water flow appropriately. The first feeding amount can be 1-2% of the total body weight of the eel. Check the next morning. If it has eaten all, the feeding rate can be increased to 2-3% at the next feeding, and then gradually increase to about 5%. As the eel's appetite increases, silkworm pupae, maggots, cooked animal viscera and blood meal, fish meal, bean cake, rapeseed cake, bran, rice bran, melon peel, etc. can be added to the feed until it is completely fed with artificial feed. The protein content of the feed should be 35-40%. When the eel eats normally, it can be fed once a day at 8-9 am and 2-3 pm.

5. Daily management

Greenhouse management In winter and early spring, on sunny days from 10 am to 3 pm, remove the straw from the plastic shed, use the sunlight during this period to heat the greenhouse, and cover the shed with straw for insulation during the rest of the time; in summer, remove the plastic film of the greenhouse, because the pond is shallow and the temperature rises quickly, you can plant aquatic plants such as peanuts in the pond to provide shade, etc.; in autumn and late spring, cover the plastic film to increase the temperature, and cover the straw mat on the film at night to keep warm. During the breeding process, you should also pay attention to prevent natural enemies such as rats and snakes from harming. After a period of breeding, if the eels in the same pond are uneven in size, they should be separated and raised in time.

In recent years, as people's market awareness has increased, aquaculture has also kept up with market needs and seized market gaps. Many farmers purchase healthy and disease-free eels in plastic greenhouse cement pools during the season when eels are on the market in large quantities and prices are low. They are then put on the market for sale during New Year's Day and the Spring Festival when prices are high, thus maximizing the benefits of eel farming. The following is an introduction to the technology of eel farming in plastic greenhouses for your reference.

1. Construction of breeding ponds: The breeding ponds should be built according to the conditions of the respective courtyards. The cement floor area should be 10-30 square meters. The ponds should be built with bricks and cement. The ponds should be 40 cm deep, 1-2 meters wide, and 20-40 cm wide. Two water inlet pipes and two drainage pipes with a diameter of 3-4 cm should be installed at the relative positions of the ponds. The water inlet pipes should be at the same height as the pond ridges, one drainage pipe should be at the same height as the pond bottom, and one drainage pipe should be 5 cm higher than the pond bottom. Metal mesh should be installed at the inlet and drainage pipes to prevent escape. Before stocking the eels, the ponds should be cleaned, water added, and fertilizer added.

2. Greenhouse construction: The installation of plastic greenhouses is based on the method of setting up vegetable greenhouses. There are two structures: single-layer and double-layer. Bamboo poles can be used as materials. Steel structure can be used if conditions permit. In addition, an appropriate amount of straw is required and covered on the plastic shed in winter to keep warm.

3. Stocking of eels: The eels to be released are required to be strong, disease-free and free of injury, and swim actively. The sizes of the eels in each pond should be roughly the same. They can be released all at once or as they are collected. However, they must be immersed and disinfected before stocking (immersion in 2-4% salt water for 5-10 minutes) and the density is about 2-3 pounds per square meter of water. As the stocking amount increases and the fish weight increases, the pond water can be deepened to 50-70 centimeters.

4. Feeding: After 2-3 days of stocking, chop up earthworms, snails, clams, frog meat, etc., put them in the feeding table for training, and increase the water flow appropriately. The first feeding amount can be 1-2% of the total body weight of the eel. Check the next morning. If it can eat all, the feeding rate can be increased to 2-3% at the next feeding, and the feeding rate will gradually increase to about 5% thereafter. As the eel's appetite increases, silkworm pupae, maggots, cooked animal viscera and blood meal, fish meal, bean cake, rapeseed cake, bran, rice bran, melon peel, etc. can be added to the feed until it is completely fed with artificial feed. The protein content of the feed should be 35-40%. When the eel eats normally, it can be fed once a day at 8-9 am and 2-3 pm.

5. Daily management: Greenhouse management In winter and early spring, on sunny days from 10 am to 3 pm, remove the straw from the plastic shed, use the sunlight during this period to warm the greenhouse, and cover the shed with straw for insulation during the rest of the time; in summer, remove the plastic film of the greenhouse, because the pool is shallow and the temperature rises quickly, you can plant aquatic plants such as peanuts in the pool to shade the sun, etc.; in autumn and late spring, cover the plastic film to increase the temperature, and cover the straw mat on the film at night to keep warm. During the breeding process, you must also pay attention to prevent natural enemies such as rats and snakes from harming. After a period of breeding, if the eels in the same pond are uneven in size, they should be separated and raised in time.

The wintering breeding of eels is to use greenhouse technology to temporarily raise and sell eels according to market demand, so as to obtain high efficiency and make money.