Causes and control methods of floating head and floodpond in fish

High temperature and heavy rain in summer can easily lead to floating head or flooding pond phenomenon of fish, which will affect the growth and development of fish, seriously lead to the death of fish in a large area, and endanger the economic interests of farmers. Therefore, the usual preventive measures are particularly important, so what are the reasons for floating heads and floodponds? How to prevent and solve the problem? Let's take a look at the detailed introduction of the pro-agricultural network.

1. Reasons for floating head and flooding pond

There are many reasons for floating head in summer, such as convection caused by the temperature difference in the water layer, high temperature in summer and high temperature during the day, and some farmers will deepen the water level in order to reduce the nutrition of fish by high temperature, which leads to higher temperature in the upper layer and lower temperature in the lower layer, while in the evening, the water temperature in the upper layer drops sharply, resulting in convection in the water layer, resulting in a rapid decline in dissolved oxygen in the whole pond, resulting in captive floating heads. Photosynthesis is not strong, high temperature and rainy weather in summer, resulting in poor light conditions, while the photosynthesis of phytoplankton on the water surface weakens, but also consumes dissolved oxygen in the water, resulting in insufficient oxygen supply and floating head. There are many reasons for the floating head of fish, but it can not be separated from the low dissolved oxygen in the water, and the other reasons are the low dissolved oxygen in the water.

2. Preventive measures

It is high temperature and rainy in summer. in order to prevent the situation of low dissolved oxygen, it is necessary to turn on the aerator at noon on a sunny day, send the water from the upper layer to the lower layer, repay the oxygen debt, do a good job in daily inspection, and strengthen water quality management. once the phenomenon of overfertilized water is found, water should be added in time to improve water quality. In the prevention, it is also necessary to control the amount of feeding, the metabolism of the fish body will accelerate after eating, digesting a large amount of oxygen, prone to floating head phenomenon, in addition, once the bait is to be fed in the evening, do not put the bait overnight, prevent night food, if there is bad weather, it is necessary to stop feeding in time, but also put in the bait to fish out, timely oxygenation will inject water.

3. Solution

Once the phenomenon of floating head occurs, it is necessary to open the aerator in time to increase oxygen, but if the number of aerator is insufficient because of the large culture area, we can give priority to increasing oxygen in critical areas according to the severity of floating head. The weight change of the floating head has a certain relationship with the water temperature. generally, the water temperature is low, the transition process is long, while the temperature is high, it is short. generally, the water temperature floating head with a water temperature of 22-26 degrees can be delayed for several hours, while the water temperature exceeds 26 degrees Celsius. Oxygen must be increased within an hour, otherwise the fish will die in a short time. If there is a serious floating head, flooding pond phenomenon, you can use the chemical oxygen method, can quickly dissolve oxygen, the specific method is to sprinkle sodium carbonate and zeolite powder on the surface, generally 40-45kg per mu, can quell the floating head phenomenon in half an hour, generally can maintain 4-6 hours.

The above are the reasons and prevention methods for the floating head and pan-pond of fish brought by the pro-agricultural network. I hope it can help you. If you want to know more, please pay attention to the pro-agricultural network.