Culture techniques of grass carp in high temperature period

Grass carp (Ctenopharyngodon idellus) is one of the main freshwater fish culture in China, known as one of the four major domestic fish, with high economic value. It is its peak growing season from July to September every year, but it is also the season with the highest temperature. At this time, if the management is not only, it is easy to die in large numbers of grass carp, causing huge economic losses to farmers. So how to raise grass carp in the summer high temperature period? Let's take a look at the pro-farm network.

1. Water quality management

High temperature in summer, it is necessary to appropriately increase the water level of fish ponds to achieve the effect of cooling, otherwise the water level is too low, the self-control ability of the water body decreases, it is easy to cause the stress reaction of grass carp, lead to the increase of the outbreak rate of disease, resulting in the death of grass carp. Therefore, it is necessary to raise the water level to about 2.5 meters in summer, with a minimum of 1.5 meters. It is also necessary to test the water quality once a week to ensure that the water quality is good and suitable for the growth of grass carp. Once the water quality gets worse, it is necessary to adjust or change the water directly to keep the fish in a comfortable water environment in the pond.

2. Increasing oxygen

As we all know, fish survive through dissolved oxygen in water. Due to site limitations and high culture density, fish often lead to insufficient dissolved oxygen, so grass carp will suffocate alive. The high temperature in summer is easy to cause a muggy environment, so there are generally three ways to increase oxygen to the water body during the high temperature period, one is the natural dissolved oxygen in the air, the second is plant photosynthesis, and the third is to increase oxygen through artificial aerators. The first method is not suitable in summer, the second method is more limited, such as no sunlight at night, phytoplankton can not produce oxygen, on the contrary, it also consumes the dissolved oxygen of the water body, so it is generally necessary to increase oxygen artificially in summer.

3. Scientific feeding

The activity of grass carp in high temperature in summer is small, generally lurking in the cool area of the pond, and the appetite is not good, so the feeding method must pay attention to the method. The feed must be fresh, the proportion of fine feeding must be increased, the temperature is higher during the day, grass carp will not eat much after feeding, which not only causes waste, but also easy to pollute the water quality after fermentation. It is necessary to increase the number of feeding times every day, 3-4 times a day, the main feeding time in the morning and evening, and a small amount of feeding during the day, of which the proportion of concentrate feeding at night should account for 60% of the proportion of fine feeding throughout the day. 80%, so that grass carp can rest after eating, which can promote its rapid fat gain.

4. Disease prevention and treatment

In the summer season with a high incidence of diseases, we must do a good job in disease prevention and control, adhere to the principle of "giving priority to prevention, prevention is more important than treatment", carry out targeted treatment, and be familiar with the characteristics of several common diseases in summer. make a decision immediately after the onset of the disease. If there is no way to determine that kind of disease, timely communication with professional technical personnel, under the guidance of professional and technical personnel targeted drug prevention and treatment.

The above is the grass carp culture technology during the high temperature period brought by the pro-agricultural network. This is the end of the content on how to cultivate grass carp at high temperature. If you want to know more, please pay attention to the pro-agricultural network.