Techniques and methods of raising crayfish

The skill of raising crayfish

Select Pond

The source of water requires fresh water quality, sufficient dissolved oxygen and no pollution. It is better to take loam clay as the best, the width of the pond is more than 3 meters, the slope is 1 ∶ 2.5, the water depth is 0.8-1.5 meters, and the pH value is 7.5-8.5. The pond area should not be too large, generally 3-8 mu, rectangular, east-west. When injecting new water into the pond, filter it with 20-40 mesh gauze to prevent wild fish and fish eggs from entering the pond with the flow of water. According to the pattern of high irrigation and low discharge, the drainage canal should be built so that it can be irrigated and discharged. Crayfish has a strong escape ability, so it is necessary to do a good job in the construction of escape prevention facilities. Usually plastic film, mesh, calcium plastic board or cement board are used to set up anti-escape facilities along the ridge of the pond to avoid the entry of enemy creatures and the escape of crayfish.

Pond cleaning disinfection can effectively kill enemy organisms in the pond (catfish, Loach, snakehead, snake, rat, etc.), wild miscellaneous fish (common carp, crucian carp, etc.), and pathogens. Quicklime and bleach can be used, which is economical, economical and safe. The specific operation methods are as follows: 1. Sterilized with quicklime. Dry disinfection: 70 kilograms of quicklime per mu, sprinkle the whole pool with chemical water, and then hug with nail rake if possible, after a week in the pond, inject new water; disinfect with water: the surface of each mu is calculated according to the water depth of 1 meter, and 130 kilograms of quicklime is dissolved in the water. Sprinkle evenly in the whole pool. two。 Disinfect with bleach. After the bleach containing 30% available chlorine was completely dissolved, the whole pool was evenly sprinkled with a dosage of 25 kg per mu.

Plant aquatic plants

"how about lobster? is there any grass in the pond? The lobster is not big, but the grass in the pond is in charge. " Aquatic plants, in lobster culture, play an important role. First, aquatic plants can fill the insufficient intake of lobster bait and supplement a large number of vitamins; second, they can prevent wind and waves, absorb some harmful substances in the water body, purify water quality, and balance the water environment; third, it can provide shelter and habitat for young shrimp and shelled shrimp to reduce bullying. Generally speaking, the planting area of aquatic plants accounts for half of the total area of the pond. Varieties are available: low-stem Reed, Zizania caduciflora, Elodea verticillata, etc. If possible, you can also put some empty cans, bamboo tubes, tree roots and other wastes at the bottom of the water body, which are crayfish's favorite habitats.

Fertilization in shrimp ponds

What are the ways to raise crayfish? Some people think that it doesn't matter whether the lobster is fertilized in the pond or not. in fact, applying an appropriate amount of organic fertilizer to the shrimp pond to cultivate bait organisms can directly provide natural bait for the shrimp after entering the pond. 400 kg / mu of fermented organic fertilizer was selected to maintain the corresponding fertility of the pond water. In the process of feeding, with the gradual deepening of the water level, to apply mature organic fertilizer, the amount and time should be determined according to the fat and thin of the water, generally not more than 80kg each time. The transparency of the pool water is kept at about 35 cm.