1, cultural environment
Crayfish culture water should not be too deep or too shallow, and the culture pond should have a slope, which can better ensure the water demand of crayfish. Then there is the problem of water quality. Water needs to be changed frequently, and the water temperature should be kept 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 and ensure the water quality, but also provide a rest place for crayfish.
2. Seed placement
From the end of March to the end of April, the overwintering seedlings of improved varieties of Tangkou were used, and 4,000 crayfish seedlings were put into each mu. The density should not be too high, even the intensive culture density at the mouth of the reservoir should be controlled at 80- 100 kg per mu, and the density of mixed culture mode should be reduced to 50-60 kg per mu. High-density seedling raising will bring great pressure to pond environment and management.
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. According to the different growing seasons of crayfish, the baits with different diameters and protein content were selected. Feed the bait properly, and never throw 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 in summer when the water temperature is high. 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 lobster is 7 ~ 8.5, and quicklime water can be sprinkled once every 65,438+05 days. When the average water depth is 1 m, use 10 kg per mu to keep the pH value of the pond water between 7 and 8.5.
5. Patrol the pond every day
In fact, crayfish culture management is not difficult. Now the technology is very mature, and there are various breeding modes, but the difficulty lies in how to do a good job in scientific daily management. There is no shortcut to crayfish culture. In order to improve the breeding income, we must do well in every link of the breeding process.