Culture methods of freshwater crayfish

Every June, crayfish from various regions of our country begin to appear on the market. At that time, many people buy some special dishes such as spicy crayfish and stir-fried crayfish, which are very popular, and during this period of time, the price of crayfish will rise in a straight line. so many areas rely on crayfish farming to make money, what are the freshwater crayfish culture methods?

1. Pool construction

Crayfish are suitable for growing in clean water and pollution-free environment, and ponds, rice fields and ditches are good breeding grounds. After the selection of land, according to the number of farming to build a suitable size of the pool, the pool area is generally about 10-50 mu is appropriate. After the pool is built, surround it with an anti-escape net and seal the bottom with soil to prevent escape. In addition, some aquatic plants can be planted in the pond according to the climate, such as Elorella, goldfish algae, verticillium, etc., accounting for about 30% of the total area of the pond.

2. Disinfection of the pool

Before releasing seedlings, use 150-300 kg of quicklime per mu and spread it evenly into the pond to facilitate the growth of lobsters.

3. Put in the seedlings

Before release, about 2250 kg of fermented manure is sprinkled per mu. If the pool water is not fermented after 3 days, a small amount of fermented organic fertilizer water can be sprinkled many times to make the pond water reach a suitable fertility. The transparency of water is required in 25~35cm, which is suitable for clear green. When the water temperature reaches above 15 degrees, go to the exclusive fishing store to buy some healthy seedlings and put them in the pool. Lobster seedlings with a body length of more than 1.5~2.0cm are generally planted with 50~80kg per mu.

4. Feeding and management techniques.

(1) feeding: crayfish are omnivorous animals, can eat soybeans, pumpkins, wheat, corn, potato, goldfish algae, animal offal, miscellaneous fish and so on. Generally, the daily intake of dry food is about 510% of the body weight of prawns. Bait needs timing, positioning, quality and quantity.

(2) Water quality requirements: the early stage is mainly fertilizer and water, and the transparency is about 25cm. In the middle and later period, it is best to change water or add water once every 3-5 days to keep the transparency of the water body about 40cm. According to the water quality, turn on the aerator properly to maintain the high oxygen content in the water. In the hot season, aquatic products are easy to die, so they should be removed in time. Regularly sprinkle microbial preparations, can be sprinkled every half a month in the whole pool, can effectively improve the water quality.

(3) Disease control: crayfish have strong adaptability, but they may also be infected with diseases in the process of culture, so quicklime should be used to disinfect the water body regularly to kill pathogens. Once the disease occurs, it is necessary to find out the cause and use medicine for the symptoms. Deal with it quickly to avoid the loss of beating.