Crayfish is very suitable for large-scale culture. What is the reason why crayfish often grow grass in summer?

In the bottom reconstruction work: when the weather is hot, the overall temperature of the underwater environment is high, acidic and the dissolved oxygen is insufficient. Under such conditions, a large number of anaerobic fermentation bacteria are most likely to be produced, and the permanganate index at the bottom is usually high, and the organic matter and nitrate content exceed the standard. Objectively speaking, under such circumstances, changing water and increasing oxygen in the fish tank in a general sense has little effect on improving the bottom. Because the duration of organic chemical modification is too short, in many cases, the chemical change ends before the bottom organic matter has had time to dissolve. Therefore, it has become popular to use flora for microbial remediation. However, due to the high weather, heavy water load and slow microbial remediation effect, the overall actual effect is not ideal under harsh conditions. Therefore, in the field of summer shrimp, seven points depend on luck and three points depend on technology.

Management method of aquatic plants: in high temperature weather, the management method of aquatic plants is lasting, that is, neither more nor less. It's easier to understand if there are too few aquatic plants. Suitable aquatic plants can clean water, digest and absorb excessive permanganate index and organic matter in water, and more importantly, give lobsters a habitat. But too many aquatic plants also have disadvantages. This is mainly reflected in floating aquatic plants and Elodea, which is a cold-water aquatic plant. Elodea nuttallii is prone to aging and death in hot weather, which will release endotoxin and pollute the water body after decay. However, if the coverage area of water hyacinth, water hyacinth and duckweed is too large, it will endanger the photosynthesis of algae plants and cause insufficient oxygen in the water body. Therefore, aquatic plants that are too densely aged should be moderately eliminated. If there are too few aquatic plants, they need to be replanted.

Raise shrimp, fish tank, water and grass. Many farms have no scientific breeding habits and no definition of prevention, and water is one of the main factors leading to the disease. Very easy to cause infectious diseases. Summarize the following aspects: good consciousness and methods of water extraction in fish tanks. Change the water in the fish tank on time. Changing water is a better way to solve the difficulties, but there are too many restrictions. The first is the convenience of water resources, and the second is the quality of water resources. To ensure that there is almost no problem with these two items in summer, the following is the inconvenience of water resources. Then, change the bottom on time (don't be afraid to spend money, how much does it cost to die ten Jin of shrimp), and using high content of sulfur will kill the bottom bacteria, especially in summer. Autumn and spring are fine. Use low content. Single sulfur peroxide cannot be used, and microorganisms such as bacteria and em need to be added to improve the bottom. Em has the purpose of improving the bottom and transferring water. Sterilization, bottom-changing sterilization, and prevention must be done. There are no harmful bacteria in your pond mouth, and of course shrimp will do a lot. It is recommended to transfer goods frequently, which can make up for the technical shortcomings of manufacturers.

With the increase of temperature, the following aspects should be paid attention to in crayfish culture. Management method of aquatic plants: With the increase of temperature, Elodea nuttallii will gradually die, and Juncus efflorescence (continuous high-temperature aquatic plants) also needs to be planted. Plant aquatic plants, peanuts and bamboos as three-dimensionally as possible. Keep crayfish in a place with heat energy to avoid continuous high temperature. There is a big temperature difference between morning and evening, so we should pay attention to the lack of oxygen in crayfish, observe the beginning of crayfish uphill and grassland anytime and anywhere, and supplement oxygen moderately. Bottom changing, detoxification, disinfection and sterilization. These three points are indispensable in the work on the farm. When the temperature of the water is high, the shrimp in the river will hide in the grass and underwater. If the substrate is not very good, shrimp will die easily. Concentrated feed should be fed with protein feed as little as possible. Try to use crayfish nets with big eyes to prevent lobsters from being injured, which can reduce the death of substandard lobsters.