Monopterus albus is a project with high economic benefit, and it is cultivated in many areas. In summer, in order to improve the survival rate of high-temperature Monopterus albus, it is necessary to do these management work well. Let's take a closer look.
1, high temperature hazard
When the temperature is high in summer, the temperature of the pool water can reach above 38℃, and the water temperature is high. Monopterus albus eats vigorously, has a lot of excrement, the water quality is easy to deteriorate, and the oxygen content is also reduced.
So we should do a good job of management.
2. Water temperature control
When the water temperature is higher than 28℃, the food intake of Monopterus albus is obviously reduced and its growth is inhibited, so it is necessary to do a good job of heatstroke prevention and cooling in midsummer.
One is planting or stocking aquatic plants, such as Zizania latifolia, water hyacinth and duckweed. The other is to build a shed to shade the sun.
3. Water quality management
Eel culture should be kept tender, lively and cool, the water color should be light brown or tender green, the transparency should be about 25 cm, and the dissolved oxygen should be kept above 4 mg/L.
Because the eel pond is shallow, organic fertilizer is generally not applied to avoid deteriorating water quality.
In summer, the PH value of water quality in adult eel ponds should be strictly controlled between 7 and 7.8.
If the pool water is acidic for a long time, it can be adjusted by sprinkling quicklime in the pool.
Step 4 feed scientifically
Eel feed should be kept clean and hygienic, especially animal feed must be fresh, and it is forbidden to feed deteriorated feed.
Pay attention to the quality of bait, and it is best to choose animal high-protein bait, such as earthworm, Tenebrio molitor, fly maggot, snail, clam meat and other fresh feed.
In order to master the feeding amount, the daily feeding standard should be that Monopterus albus eats on the same day.
Step 5 prevent escape
There are many thunderstorms in summer, and sudden changes in weather can easily lead to discomfort and irritability of Monopterus albus in the pool water, especially at night.
Therefore, it is necessary to regularly check whether the water level and the escape net at the inlet and outlet are damaged, and whether there are cracks in the pool wall and bottom. After the damage, it should be maintained in time to eliminate hidden dangers and block the way out to prevent rainwater from flowing into the pond and Monopterus albus from escaping with the water.
6, prevent hypoxia
In summer, the pool water is often in a state of hypoxia.
Although Monopterus albus is resistant to hypoxia, excessive hypoxia can also cause floating head, affect growth and development, and even lead to death in severe cases.
It should be noted that, first, water injection is not allowed at night, so as not to cause convection in the upper and lower water layers in advance, which will cause the eel to float.
Secondly, a certain amount of loach is mixed in the eel pond; The third is to plant aquatic plants in the pool.
If floating head is found, it should be handled in time to ensure the growth safety of Monopterus albus in high temperature season.
7. Prevent enemy injury
Monopterus albus is raised in the pond, and the water level is shallow. Monopterus albus is easy to be exposed when traveling in the morning and evening, and it is easy to be invaded by birds, animals, snakes and rats.
Therefore, methods such as driving, catching and killing should be taken to prevent eels from being hurt.
At the same time, to prevent pesticide poisoning.
8, disease prevention and control
During the high temperature period, the common diseases of Monopterus albus cultured in ponds mainly include cold, fever, coma, plum blossom spot and so on.
When preventing and treating cold diseases, pay attention to the temperature difference of water when changing water. Fresh water should be injected into the buffer pit first, and then changed after a period of time.
Do not change water more than 1/3 of the total water at a time, and inject fine tap water.
The prevention and treatment of fever should reduce the density of Monopterus albus in the pond, and if it happens, it should be replaced with fresh water immediately.
Coma is a frequently-occurring disease in hot season.
At the time of onset, Monopterus albus was in a coma.
Prevention and cure method: firstly shade the sun and cool down, and then chop the fresh clam meat and sprinkle it into the pool, which has certain curative effect.
The symptom of plum blossom spot disease is that Monopterus albus has a round spot the size of soybean or broad bean on its back.
Control method: keep some toads in the pool.
When the disease occurs, the toad scalp is peeled off, tied with a rope, and dragged in the pool several times for 1 ~ 2 days to eliminate the disease.