Introduction to the Technology of cultivating Monopterus Albus in thin Film Pond

China Monopterus Albus Research Network

The technology of cultivating ricefield eel in soilless still water in thin film pond invented by Dr. Zhou Wenzong:

The main results are as follows: 1. The cost of building the pool is low, the cost per square meter is less than 25 yuan (including pipeline facilities, labor costs and plastic film, etc.), the service life is 8 years, the construction speed is fast, and overcomes the defects of high cost and slow construction of the cement pond. it is about 1 second of the cost of the cement pool. And easy to maintain, once the film cracks or holes, it can be welded with plastic hot air welding torch.

2. It does not affect the nature of agricultural land. If Monopterus Albus is not cultivated, it is easy to restore the original land character, which is suitable for the developmental use of collective construction land after land transfer.

3. It can be farmed all the year round, avoiding the disadvantage of concentrated cage breeding season (June to September) and high seedling price, which can be reduced by 10 to 20 yuan per kilogram of seedlings; while overwintering is relatively easy, the water temperature is relatively high, and it can be sold when the commodity price of eel is the highest before and after the Spring Festival. about 10 million yuan more per kilogram of eel

4. It uses less water and has a wide range of adaptation. it can be cultured either in courtyard or on a large scale; it can be cultured indoors (including balcony and roof) or outdoors; it can be cultured in freshwater or saline-alkali soil.

5, save labor, the same culture area, the labor is only the net cage culture 1GUP 3, and the operation is safe

6. when diseases and insect pests occur, it is easy to observe and take measures in advance, the spraying liquid has no dead corner, the disease prevention effect is good, the drug cost is low, the pool wall is very smooth, it will not cause damage to the surface mucosa of ricefield eel, and the occurrence of fish disease can be prevented. The survival rate is 10% higher than that of the cage. 7. In the low temperature season, the water temperature is often higher than that in the cement pond, which is beneficial to prolong the feeding period of Monopterus Albus, the quality of the cultivated Monopterus Albus is well controlled, the water is changed thoroughly, the shelf life of the water is long, and the ecological culture has no pollution to the water. and the income of by-products such as Loach and small miscellaneous fish is 20 yuan / m.

In thin film pond culture, special fish nests are used instead of soil, and water plants and water quality improvers are used to improve water quality. although the pond is small, the water quality can be maintained in a stable state by growing vegetables such as celery and hollow cabbage on the surface of the water. finally, there is no need to change water for raising eel and no more fertilization for growing vegetables. Generally, we require a change of water every 30 days in the spring and autumn season, but only once a half a month in summer. Usually, we only need to add part of the water lost due to evaporation.

In 2005, we began to use HDPE impervious film with smooth surface thickness 0.35mm for culture. the film is mainly composed of 97.5% high density polyethylene and about 2.5% carbon black, anti-aging agent, antioxidant, ultraviolet absorber, stabilizer and other excipients. It has good heat and cold resistance, good chemical stability, and can resist acid, alkali, organic solvent and other corrosion. It has high rigidity and toughness, good mechanical strength, good resistance to environmental stress cracking and tear strength, excellent puncture resistance, can resist most plant roots, and is environmentally friendly and non-toxic. After several years of demonstration and promotion, we have continuously optimized and improved the construction technology and breeding technology, gradually standardized and programmed, produced better results, have been warmly welcomed by the majority of farmers, and have broad prospects for development.

Many people will ask, "with the black film, the water temperature in the fish pond rises very fast in the summer sun, and even the best shading treatment can easily reach or exceed the high temperature limit of the eel and kill the fish." In fact, ecological cultivation of rice field eel in soilless still water in the film pond inhabit the lowest layer of the pond. Although the temperature in the external air reaches 37 ℃, we grow towel gourd and grapes on the edge of the pool to cover the sun, and then grow vegetables and transplant aquatic plants in the surface of the water, which not only has the effect of purifying water quality, but also has the effect of shading. Therefore, generally, the water temperature of 15cm below the water surface is only about 33 degrees, and in summer 6.7.August, the water level is generally around 30cm, so the water temperature at the bottom of the pool generally does not rise and fall suddenly. In addition, our experiment confirmed that the best feeding temperature of Monopterus Albus is 31-33 ℃, so we should make full use of the high temperature resources in summer to promote the growth of Monopterus Albus.

Fushou snail has a wide diet and can eat the leftover feed and accumulated feces of Monopterus Albus, which can purify the water quality to a certain extent, but some people will ask, "it is the intermediate host of many bacteria. Using it is bound to increase the incidence of Monopterus Albus." according to each 20 square meter pool, 2 jin of snails or field snails are added. We control the number and strictly disinfect the disease of Monopterus Albus. It is not random to put longevity snails or field snails in the yellow eel pond. In addition, through microbial preparations, water quality regulators, animal tools and various water treatment technologies to regulate water quality, there is no need to worry about the deterioration of water quality in small ponds, and experiments have confirmed that the rapid growth of Monopterus Albus needs fertilizer and water, and its requirement for water quality is higher than that of ordinary fish.

Someone asked: "when using the greenhouse, we all know that the temperature difference between inside and outside the greenhouse is very large. The fish ponds need to change water. The water temperature in the fish ponds in the shed is relatively high, while the water temperature outside is relatively low. The temperature difference between one in and one out is large. Monopterus Albus will catch cold." There is a certain difference in water temperature inside and outside the greenhouse, generally a difference of about 5 degrees. Generally, we only need to change the water to 1/3 of the pool water volume. Through "seedling training", we can improve the ability of rice field eel to adapt to the temperature difference. Whether Monopterus Albus gets cold or not depends on the quality and treatment technology of the seedlings. Nowadays, there are many winter swimming enthusiasts in the cold north, and they do not have to worry about catching cold.