1, culture environment
The crayfish culture water should not be too deep or too shallow, and the culture pond should have a slope, which can better ensure the crayfish's water requirements. Then there is the problem of water quality. It is necessary to change the water frequently and keep the water temperature around 10-30℃. At the same time, aquatic plants such as aquatic plants can also be planted in the pool. Aquatic plants can not only purify water, but also ensure water quality, and also provide a place for crayfish to rest.
2. Seed placement
From the end of March to the end of April, the overwintering seedlings of the improved variety Tangkou were used, and 4,000 crayfish seedlings were put into each mu. The density should not be too high, even if the intensive culture density of the storage pond mouth should be controlled at 80- 100 kg per mu, and the density of the polyculture mode should be reduced to 50-60 kg per mu. The high density of seeding will bring great pressure to the pond environment, management and other aspects.
3. Feed feeding
In addition to the natural bait provided by aquaculture water, artificial auxiliary bait feeding is also extremely important in crayfish artificial culture. Choose baits with different diameters and protein contents according to different growing seasons of crayfish. Feed the bait properly, and never feed too much.
4. Daily management
The water level depends on the change of water temperature, which is generally kept at 0.6- 1 m in spring, and the water depth is controlled at 1- 1.5 m when the water temperature is high in summer. The dissolved oxygen in shrimp pond water is kept at about 4 mg/L, which is suitable for the growth and development of lobsters.
The most suitable pH range for lobsters is 7-8.5, and quicklime water can be sprayed every 15 days. When the average water depth is 1 m, the amount of 10 kg is used per mu to keep the pH value of the pond water between 7-8.5.
5, daily patrol pond
In fact, crayfish culture management is not difficult. Now the technology is very mature, and the culture mode is also diverse, but the difficulty lies in how to do a good job in scientific daily management. There is no shortcut to crayfish culture. If you want to improve the breeding income, you must do every link in the breeding process.