The method of heating Fish Pond Water by culturing Monopterus Albus in Winter

First, to build eel ponds: choose Xiangyang open land, fields and old ditches to build ponds. In order to facilitate the exchange of water, it is best to build a pool where there is a water source, and use cement pool, brick pool, stone pool and Sanhe soil pool to connect with cement or concrete, so that the bottom of the pool does not leak and it is not easy to run eels. The size of eel ponds can be determined according to the scale of feeding, ranging from a few square meters to dozens of square meters. The general size of the pool is 30 square meters, and the depth of the pool is 1 meter. The shape of the pool depends on the place. The water depth in spring, summer and autumn is generally kept at about 10 mures and 15 centimeters, and a Rain Water is left dry in winter. In order to facilitate the change of water, a nozzle is opened at the bottom of the eel pond and at the top of the eel pond. And install fish traps. After the bottom of the pool is watertight, it is necessary to lay 3mur5 inch deep soil, which can be cushioned with soil made of river mud and grass retting (the bottom pad is up to 60cm in some places), and stone piles are scattered on the center or four corners of the pool to facilitate the rice field eel to keep warm or enjoy the cool and adapt to the settlement habit of rice field eel. The most suitable temperature of pool water is 10 ℃ and 25 min. Planting trees, melons and bamboos in the four ponds to build a shed, or planting several Zizania latifolia trees to reduce summer sunshine, some aquatic plants such as water lotus can be properly planted in the pond for Monopterus Albus to avoid summer heat.

Second, seed selection: select improved varieties, with yellow as the best, followed by cyan. It is best to contact eel farmers to buy eel species that are uniform in size, disease-free and injury-free, or you can buy them on the market or catch them in the wild. Eels should be planted in March and April after the sting (March 5 or 6). Generally, eels should be planted at a rate of 2 tons per square meter. 5Mui 3 jin, if the feeding conditions are good, you can put in 5 Muz 10 jin or so. When planting, mixed culture of one or two toads in each pool can be used to prevent common diseases of ricefield eel and put some melons or straw balls into the pool to facilitate the small eel to hide. The source of eel species can also be used to catch young eels (or cages) with their bare hands in rice fields or shallow mud holes from April to October, but when catching with bare hands, they should wear gauze gloves and clip the front part of the eel with their middle and index fingers, so as to prevent the young eels from internal injuries such as those caught with iron hooks and cannot be raised. Third, feeding: Monopterus Albus is raised in the pond, because its range of movement is limited, it must be carefully fed with bait. The rice field eel is fed with mussel meat, snail meat, miscellaneous fish and shrimp, offal and borer of livestock and poultry, silkworm pupa, scraps of food factory, rapeseed cake, and likes to eat artificially propagated earthworms, flies, and so on. You can also use lights to induce moths or pig blood to attract flies to produce light as fodder. Monopterus Albus is a carnivorous fish, very gluttonous, when there is a serious shortage of bait, Monopterus Albus has the habit of killing each other or eating small, strong and weak food. Since Monopterus Albus does not come out for activities during the day, it is better to feed it from 8 to 10:00 every night. Mainly to throw animal bait, plant bait (such as skin, rice, melons and fruits and other sour and sweet food) as a supplement. It is generally fed once a day, and the early feeding amount is 3% of the body weight of Monopterus Albus, and the feeding amount increases accordingly with the increase of Monopterus Albus body weight. It is best to spread the bait evenly over the whole pool. When the bait is insufficient, you can also add some duckweed and mulberry leaves to seize the golden season from spring to winter to feed the eel at the right time. In order to avoid stopping eating ricefield eel, mixed feed is required. The principle of baiting is new eel, nutrition, diversity and exhaustion. Human and animal manure must be fermented by saprophytic heat before it can be spilled and fed. It is forbidden to use spoiled or spoiled food such as rancidity and mildew lees, bean curd dregs, potato dregs and so on. If feeding is fixed at a fixed time, it is convenient for eel feeding and artificial fishing. Remove the residual bait or inject new eel water early in the morning after feeding to keep more oxygen in the pool. Of course, bait should also be moderate, too much will make the water worse, and too little will lead to insufficient bait. Fourth, meticulous management: management should be "three investigations and three precautions". Check the water condition to keep the water quality fresh and keep the pool clean and hygienic. Observe frequently and change water immediately when it is found that the water quality is slightly smelly or unusual. If the water source is poor, the water should be changed every 5 seconds and 8 days to achieve seasonal change. When the weather is hot and the water temperature is too high, it is necessary to build a shade to cover or properly deepen the water level. Try not to change in winter. Some Misgurnus anguillicaudatus can be mixed in the pond. 1 Mel 2 jin per square meter to improve water quality and prevent ricefield eel from intertwining with each other. Second, to check the bait situation, we should pay attention to the observation of lack of bait, single bait and mixed bait, and pay attention to the fact that when it thunder, rain and lack of bait, Monopterus Albus flees out, does not eat, does not enter the hole; when lacking bait, Monopterus Albus will chase after each other and keep secret. Feeding new bait should range from less to more. Three check the disease, as long as prevention in advance, pay attention to observation, eel disease can be controlled. The "three precautions" are: first, to prevent escape, to build the pool firmly, to prevent the flood from destroying the pool or eel overturning, and to drain water in case of thunderstorm to prevent escape. Second, to prevent damage, geese and ducks are not allowed to enter the pond. Third, anti-virus, it is strictly forbidden to put cigarette butts, chemical fertilizers, pesticides or contaminated water into the pond, especially if chemical fertilizers and pesticides have severe damage to fish, once poisoning is found, the pool water should be drained thoroughly and the poisonous water and dirt in the pool should be flushed with new water. Then mash the garlic with water and put it into the pool according to 5 grams per square meter to avoid the death of a large number of rice field eels. Fifth, disease prevention and control: Monopterus Albus commonly has fever, cold, dermatosis and capillary nematode disease. Fever is caused by the high density of ricefield eel. The control method is that a small amount of Misgurnus anguillicaudatus can be mixed in the pond (1 Loach for every 200 rice field eel). When the rice field eel is sick, change the water immediately, or add 7/10000 copper sulfate solution to the pond, which can be sprinkled about one or two per square meter. The cold of Monopterus Albus is caused by the low temperature of the injected new water. Before changing water with very low temperature spring water, well water, mountain mine water or reservoir water, let the water temperature rise and then put it into the pool. When the water temperature is below 12 ℃ in late autumn and early winter, Monopterus Albus begins to spend the winter at a depth of about 30 centimeters under the soil. At this time, to drain the pool water, only keep the soil moist, and cover the soil with a layer of about 5 inches of straw to prevent freezing. Plum blossom spots the size of soybeans or broad beans appear on the back of Monopterus Albus, which is a common disease of Monopterus Albus. The prevention method is to often put some toads in the eel pond, because the secretion of the toad has the effect of preventing this disease. If Monopterus Albus has suffered from this disease, immediately take two skinned toads and tie them with ropes and drag them in the pool several times to get rid of the disease. Dermatosis is caused by fungal infection caused by the bite of ricefield eel or the wound caused by enemy organisms. The sick eel has "white hair", loss of appetite, emaciation and death. The ricefield eel was sterilized with quicklime before entering the pond. When diseased eel is found, sprinkle it all over the pond with 4/10000 salt and baking soda mixture.