Crayfish easy to culture benefit good freshwater culture crayfish 5 key points

First, pond conditions. Crayfish ponds should not be too deep, generally no more than 1.5 meters, there should be a certain slope, it is easy to create a water environment with a combination of depth and water temperature, and then make full use of light energy to increase water temperature and promote the growth of crayfish. The crayfish has a strong ability to dig holes and escape, the ridges of the pool should be compacted and rammed firmly, and there can be no caves with a width of more than 1.5 meters, surrounded by asbestos tiles, and double-layer filters should be used to prevent damage and cause shrimp to escape. The new pool should be covered with a layer of 60-80 mesh polyolefin mesh around the slope or in the middle of the pool ridge.

Crayfish culture

Second, plant aquatic plants. Many crayfish ponds are transformed from fishing ponds without any aquatic plants. In fact, crayfish, like green shrimp and river crabs, also need aquatic plants. One of the reasons why some farmers fail in farming is that they have not planted aquatic plants. Aquatic plants can provide shelter for crayfish, purify water quality, increase dissolved oxygen, and provide fresh natural plant bait for crayfish. The main species of aquatic plants are verticillium verticillata, Eloe verticillata, bitter grass, water peanut, etc., accounting for 20% to 30% of the farming area.

Third, feed. Crayfish are omnivorous, like to eat animal bait, and gluttonous, large food, lack of food is easy to cause cannibalism. At present, the viscera of chickens, ducks, pigs and other livestock and poultry are cheap, and some farmers feed the whole viscera of livestock and poultry, but do not beat them evenly, resulting in crayfish fighting with each other when feeding, and the water body turns black and smelly, which can easily lead to disease, resulting in the failure of some farmers. It is necessary to adhere to the combination of fine and green, and flexibly control the amount of bait according to the situation of feeding.

Fourth, adjust the water quality. Although the crayfish has strong viability and tolerance to hypoxia, fresh water quality is still one of the key factors for the high yield of crayfish. In the environment of low dissolved oxygen, crayfish lose their appetite and grow slowly, and it is easy to cause escape and disease. Once a large number of crayfish are found climbing to the shore or floating on the grass, the water should be changed immediately, especially in the middle and later stages of culture. Change the water once or twice a week to maintain a high level of dissolved oxygen in the water.

Fifth, disease prevention and control. Crayfish has strong disease resistance and is not easy to get sick in natural waters. after high-density culture in ponds, improper management is also easy to cause diseases, such as ciliosis, black Gill disease and hemorrhagic disease. To adhere to prevention-based, regular use of quicklime (20ppm) sprinkled throughout the pool, alternate use. Crayfish are very sensitive to pesticides. Pesticides such as trichlorfon and enemy killing are prohibited. It is also necessary to prevent a large number of farmland potions from flowing into shrimp ponds, causing unnecessary losses.