Culture techniques of Monopterus Albus in Spring

As the saying goes, "the season of the year lies in spring". Good spring management is one of the successful conditions for Monopterus Albus culture. In combination with practice, the author talks about the management points of rice field eel culture in spring.

Preparatory work

Before and after the Qingming Festival, when the water temperature is generally stable above 10 ℃, you can begin to make preparations. First of all, the environment around the culture pond is cleaned, and then drug disinfection is carried out. The method is to make 50 g / L saturated lime solution with quicklime, filter out the clear solution, add 10 g / L caustic soda to stir well to make a strong alkali disinfectant, and then spray and disinfect the perimeter of the culture pond with this solution. Finally, remove the overwintering cover on the surface of the eel pond and immediately spray disinfectant on the mud surface and the inner wall of the pond. After completing the above work, check the overwintering condition of Monopterus Albus and whether the facilities of the eel pond are in good condition. At the same time, the mud ridges in the pond should also be trimmed and planted with aquatic plants such as mushrooms, water chestnuts, taro and so on.

Keep the water warm

The temperature in spring is low, and sometimes there is a "spring cold" phenomenon. Therefore, we must do a good job of heat preservation. At first, we can temporarily borrow the plastic film for overwintering, uncover the film at noon without wind and sunshine for a few hours, cover the film for heat preservation in the afternoon, and use electric lights or other heating facilities if possible. Heating with electric lamps can also strengthen the light and promote the reproduction and growth of algae, so as to achieve the purpose of inhibiting the reproduction of harmful bacteria. If there are grape vines around the eel pond, especially at the top, branch thinning should be strengthened in order to make use of sunlight as much as possible.

Water quality management

Monopterus Albus is a shallow water and temperature-loving animal, so in the early spring season, the water level should be controlled at about 6 cm to facilitate the rise of water temperature. At the same time, it is necessary to do a good job of changing water in order to keep the water quality fresh, improve the appetite of rice field eel and strengthen the conversion of bait. Water exchange is an effective way to remove pond dirt, increase dissolved oxygen and keep water quality fresh. However, Monopterus Albus is sensitive to the temperature difference of water. Once the temperature difference of changing water exceeds 3 ℃, Monopterus Albus may suffer from cold disease and gradually die. Therefore, when changing water, we should change the same temperature water as far as possible, the general measure is to build an additional reservoir, and then change the water after exposure. The times of changing water should be controlled flexibly according to the stocking density, feeding condition and air temperature of Monopterus Albus, and the best time is noon on a sunny day. There is no need to change water when the temperature is low. When the temperature rises to 15 ℃, the water can be changed once a week, and each time accounts for 1 ℃ of the total water volume; when the temperature rises to about 20 ℃, the water can be changed once every 5 days, and the water can be changed every time.

Timely bait

The main purpose of baiting in early spring is to restore the physique of Monopterus Albus, promote the activities of Monopterus Albus, increase its appetite and adjust its feeding habits. According to the experiment, the order of olfactory sensitivity of Monopterus Albus to all kinds of bait is as follows: earthworm, clam, snail, clam, frog, chicken intestine, duck intestine, pig intestine and so on. Usually feed live earthworms, small ones can be fed with yellow powder insects, generally with live bait for about a week, Monopterus Albus can pour out of the nest, and then gradually domesticated to feed other kinds of bait. The initial feeding amount can be about 0.5% of the body weight of ricefield eel, and if there is more than enough food the next day, it should be reduced as appropriate, otherwise the feeding amount should be increased appropriately.

Disease prevention and cure

Monopterus Albus is easy to suffer from water mildew under the condition of low temperature and little light in spring. the control measures should not only pay attention to strengthen the light and increase the water temperature, but also sprinkle the whole pool with 0.5 g / L salt and 0.4 g / L baking soda solution. After the onset of the disease, 0.2 mg / L malachite green or 0.3 mg / L methylene blue solution can be sprinkled throughout the pool, once every 3 days, 3 times can be cured.