Experience of how to cultivate ricefield eel with Zizania caduciflora in the field

Interplanting rice field eel with Zizania caduciflora is a new mode of interplanting rice field eel with Zizania caduciflora. The production practice in Jingjiang and other places in Jiangsu Province has proved that interplanting rice eel with Zizania caduciflora in the field can not only make full use of the ecological environment of the water body in the field, but also reduce the production cost of planting Zizania caduciflora and raising eel. It can also improve the comprehensive economic output rate of Zizania caduciflora field production.

Experience of how to cultivate ricefield eel with Zizania caduciflora in the field

1. Field construction. Leveling the field, dig a horizontal trench with a depth of 0.8 meters and a width of 0.5 meters, dig a longitudinal trench with a width of 1 meter and a depth of 0.3 meters in the middle of the field, and reinforce the ridge of the pool by heightening the soil dug out, which is 0.5 meters higher than the surface of the field as an anti-escape wall, tamping and impermeable. And cover it with tight-eye barbed wire at the inlet and drain of the field. The Zizania caduciflora field as a culture of ricefield eel must have the characteristics of ventilation, light transmission, convenient entry and drainage, and good soil water retention. In order to facilitate the operation and management, the area of Zizania caduciflora field should be 10-15 mu.

2. Apply sufficient base fertilizer. After ploughing, exposure and crushing the soil, 1000 kg of rotten pig and cow manure and 40 jin of calcium superphosphate were applied per mu as base fertilizer, which was evenly scattered on the surface of the soil. At the end of April, 50-100 kg of chicken manure was applied to each co-breeding pond (surrounding drainage ditch, etc.) with a depth of 0.3 meters to breed large zooplankton to feed eel.

3. Transplantation of Zizania caduciflora. The intermediate Zizania caduciflora with high yield, good quality and strong waterlogging resistance was selected. Planting plant spacing 75 cm, row spacing 80 cm, transplanting 1110 plants per mu, transplanting ended in mid-early April.

4. Stocking and co-breeding of Monopterus Albus. Since May, we have purchased wild eels caught by fishermen in eel cages in the local market, choosing eels that are disease-free, lively, neat in size and yellow or reddish brown in color, and usually have 800 eels of 20-30 eels per kilogram per mu. Left and right tail. If the bait source is sufficient and the water quality is good, it can be increased to 1000. Before planting eels into the field, soak the body surface with 3-5% salt water for 5-10 minutes to prevent the body surface from entering the field with disease.

When raising rice field eel seedlings, some Loach can also be properly stocked, which can increase dissolved oxygen in water and prevent rice field eel from intertwining with each other when it moves up and down. Monopterus Albus is a meat-based omnivorous fish, especially likes to eat fresh bait, such as small fish and shrimp, earthworms, fly maggots, snail meat, aquatic insects, etc., mainly feed live small fish and shrimp, small snails, feed once a week, about 30-50%, put live small fish, shrimp and snails into high-yield ditches and drainage ditches in the field, let rice field eel feed on its own.

But also properly match and feed some plant feed, such as wheat bran, rice, melons and fruits, vegetables and so on. During the breeding period, formula feed with a protein content of more than 30% can also be fed at multiple points to ensure that all eel species are fed evenly. Monopterus Albus has the habit of foraging day and night, and it can be fed every evening at the first rearing. After about 10 days of domestication, Monopterus Albus can be fed three times at 9: 00 in the morning, 2: 00 in the afternoon and 6: 00 in the evening to ensure adequate bait for Monopterus Albus. Each feeding must be flexible according to the weather, water temperature and the amount of residual bait, usually 5% of the total body weight of Monopterus Albus. Adhere to the "Siding" feeding every day, it will make Monopterus Albus form a conditioned reflex and feed in groups.

5. Disease control. Before stocking, eel seedlings should be washed and disinfected with 3-5% salt water for 5-10 minutes to kill body surface parasites; ricefield eel is cultured in the water body of Zizania caduciflora field, Jiang Bai purifies the water quality, creating a good ecological environment for the growth and development of ricefield eel; Monopterus Albus has strong disease resistance and is difficult to get sick. As long as 2 grams of bleach per cubic meter or 10 grams of quicklime are sprinkled on the field water body every half a month during the co-breeding period, prevention work is done, diseased eels are found, and timely treatment is carried out. The use of toxic pesticides such as herbicides, pentachlorophenol sodium and poisonous phenols is prohibited.

6. Daily management.

① water quality management. The field water area of Zizania caduciflora is the common living environment of Zizania caduciflora and rice field eel. The water quality management is mainly based on the production needs of Zizania caduciflora and the living habits of rice field eel. Deep water is irrigated at the beginning of planting to support seedlings and live trees. Slow seedling after water retention of 6-7 cm, in order to facilitate the rise of ground temperature, promote the growth of plants and tillers. In the later stage of tillering, the water layer gradually deepens to 15 cm (beneficial to the growth and development of Monopterus Albus), which can control ineffective tillering and promote early pregnancy.

During the period of co-cultivation, the pool water must be kept fat and fresh, with sufficient dissolved oxygen. Generally, the fresh water should be injected once every 5-7 days, and the water volume should be changed by 1 × 4-1 inch, and the water level should be increased by 10-15 cm. The water quality should be adjusted to keep the water quality good. The residual bait must be removed before each feeding, so as not to pollute the water quality. In addition to paying attention to daily feeding and water quality management, regular pool inspection and daily management should not be ignored, especially the weather changes should be paid attention to at all times in order to take corresponding management measures. In muggy weather, it was found that Monopterus Albus put its body upright and its head out of the water, indicating that there was a serious lack of oxygen in the water, so it was necessary to add new water to increase oxygen.

② scientific topdressing. For the first time, 5-6 kg of urea was applied per mu 10-15 days after planting, and only mud water was left after topdressing. The second time was to promote seedling fertilizer. 10 days after the first topdressing, 50 kg of crushed bean cake was applied per mu (not only as seedling fertilizer for Zizania caduciflora, but also as plant bait for rice field eel). The third time is pregnant Zizania latifolia fertilizer, in most tillers into the pregnant Zizania latifolia stage, 7-8 kg per mu.

③ weeds and leaves. Weeding twice, the first time was 20 days after planting, and the second time was before the plant was closed. In the middle of August, under the premise of not harming the plant, the withered and diseased leaves were peeled off to make the field transparent and beneficial to the growth and development of Monopterus Albus, and the peeled leaves were taken out of the field for treatment.

④ harvests and catches eels. During the golden autumn period, the adjacent tillers should not be damaged and should be harvested once every 3-5 days. Eel is generally caught from late October to mid-November, and the conventional methods are to drain water in field ditches, dry fishing, net copying and other fishing methods. Monopterus Albus has high economic benefits before and after the Spring Festival, so it is necessary to strengthen the management of overwintering, drain the pond water, and cover it with a layer of rice straw or wheat straw, Zizania caduciflora leaves, etc., to keep the soil moist and the temperature in the soil layer, so as to achieve the purpose of moisturizing and anti-freezing. In addition, it is also necessary to prevent the invasion of biological enemies such as rats and cats.

The living habits of eel

The eel's body is cylindrical, suitable for living in caves, and is very beneficial to entering and leaving caves and reducing friction. It is really a bit of a "hermit" bearing, has no special attack ability, nor does it have a powerful defensive weapon, and its only skill is "36 tricks, escape for supremacy."

It has neither pectoral fin nor ventral fin, and even the dorsal and anal fins have been reduced to only a little skinfold, and the scales have disappeared so that they are invisible to the naked eye, but the whole body can secrete very slippery mucus, and it can slip out of your hands if you are not careful. The main function of the mucus on the eel is to prevent bacteria and germs from infecting the body and reduce diseases; to prevent the entanglement of parasitic animals and plants, which is conducive to growth; and the smooth surface of the oil head is conducive to its unhindered passage in the mud.

How much does it cost to raise Monopterus Albus?

The main results are as follows: 1. The cost of building the pool is 200 yuan, and the cost of purchasing 15 million 20 kilograms of wild ricefield eel is about 300 million 400 yuan per kilogram of medium size rice field eel in summer (30 kilograms and 50 grams).

2. After feeding for 5 to 8 months, the body weight of Monopterus Albus can be increased by 3 to 5 times. If we calculate that the weight of 20 kg Monopterus Albus can be increased by 60 kg, according to the feed cost of 8 yuan per kilogram of Monopterus Albus (in fact, the use of a large number of fly maggots, earthworms and so on is not so much), it will cost 480 yuan.

3. The total expenditure on drugs and other items is 100 yuan, and the total cost of the above four items is about 1080,1180 yuan.

Development Prospect of Monopterus Albus Culture

The main results are as follows: 1. The prospect of rice field eel culture market is very broad, the hidden market potential is huge, and the market demand is increasing year by year. At present, the consumption structure of Monopterus Albus is single, while many kinds of series of deeply processed products with Monopterus Albus as the main raw materials, such as various baked foods, quick-frozen foods, canned foods and health products have not been developed, and a diversified consumption structure has not yet been formed, so it has a broad market space. At the same time, the price of Monopterus Albus is in the middle range and has a wide range of consumer groups.

2. There is a great contrast between the development of domestic Monopterus Albus breeding industry and the market demand, that is, the rising consumption demand does not stimulate the in-depth development of domestic Monopterus Albus and Loach aquaculture.

3. The good opportunities formed by the establishment of brand-new high-efficiency breeding technology and supporting service system and market conditions have jointly created a broad space for large-scale culture of Monopterus Albus and Loach.

Raising ricefield eel in the field is a method used by many farmers at present, which not only achieves the effect of two profits in one field, but also greatly increases the yield of each other by the interaction between the two. Therefore, raising ricefield eel with Zizania caduciflora is a method adopted by many farmers at present, and it has also achieved very good results.