The plan for a year lies in spring, which is the season for the growth of all things and also a good season for raising shrimp. Crayfish, as a popular internet celebrity food among consumers, has broad market prospects. Below are some precautions for spring crayfish farming management.
1. Pay attention to weather changes and moderately raise the pond water level
After a dry season in winter, the water in many crayfish ponds drops very low. As the temperature rises, a large number of parent shrimps carry young shrimps out of their holes. On the one hand, the aquaculture water body is very small and the space is limited, which can easily lead to competition among crayfish for space resources, food, etc. The weather in spring is unpredictable, with temperatures fluctuating between high and low, and a large temperature difference between day and night. There may be a phenomenon of anti cold waves, and negligence can cause serious damage to crayfish and even mass death. Therefore, pay attention to the arrival of cold air, moderately raise the aquaculture water level, and maintain a relatively stable water temperature to avoid freezing damage.
2. Strengthen water quality management and timely replant aquatic plants
In spring, the temperature is low, the water temperature is also low, the growth of aquatic plants is slow, and the activity of shrimp seedlings is weak. So the ecology of the entire lobster pond is still relatively fragile. In early spring, the water quality is thin and there is a lack of biological feed in the water. For shrimp fry, plankton is the best natural feed. Therefore, it is necessary to do a good job of cultivating algae in water culture in a timely manner after the beginning of spring, and apply fertilizer to the water body appropriately to increase the vitality of aquatic plants. After the beginning of spring, bacteria and parasites multiply in large numbers, damaging water quality, eroding young shrimp bodies, and reducing the survival rate of shrimp bodies. So it is necessary to regularly disinfect and stabilize the water quality during early spring to ensure the healthy growth of shrimp.
To raise shrimp well, first raise a pond of grass. In early spring, the water grass begins to sprout and is easily fed by crayfish. Therefore, it is necessary to strengthen the feeding of feed, reduce the feeding of crayfish and shrimp on tender shoots, apply moderate fertilizers to ensure the growth of aquatic plants. For ponds with less aquatic plants, it is necessary to plant bitter grass, algae, water peanuts, etc. in a timely manner. When transplanting water peanuts, they should be placed along the edges.
3. Prevention and control of early spring moss
Generally, aquaculture ponds with shallow water, thin water, and a history of moss (moss spores deposited on the bottom sediment of the pond) are prone to moss. Moss competes with aquatic plants for growth space, competes with organisms in aquaculture ponds for fertilizer, and blocks the exchange of substances between water and air in aquaculture ponds. Shrimp fry that accidentally enter the pond are often entangled by it and die due to difficulty breathing and feeding.
Timely dry the pond and expose it to sunlight, choose appropriate cleaning products (use tea meal with caution, otherwise it will cause excessive growth of moss/water net algae). Maintain a certain level of fertilizer in the pond water to prevent moss from surviving. Implement the correct treatment method with appropriate medication for ponds where moss has already appeared.
4. Early feeding can improve the quality of parent shrimp and the survival rate of juvenile shrimp
Crayfish have a diverse diet and can consume both plant-based and animal based feed. They usually start foraging in spring when the water temperature is above 10 ℃ and are quite gluttonous. After experiencing a lack of food and nutrition in winter, parent shrimps require a large amount of food and nutrients to fatten and grow, and the development of young shrimps also requires a large amount of food. Insufficient feed can easily lead to weakened physical fitness of parent shrimp, causing diseases and death, as well as the occurrence of mutual attacks and killings. Therefore, to ensure the quality of feed, crayfish in early spring have a weaker physique, so it is necessary to feed them with high protein content to improve their survival rate. The second point is that the feed should be fed in moderation, depending on the weather conditions. On sunny days, feed more, and on rainy days, feed less. The feeding amount should be controlled within 2 hours after consumption. Flexibly controlling the feeding time and supplementing the required nutrients is the key to saving manpower and material resources, otherwise the benefits outweigh the losses and pollute the water environment.
5. Control of wild miscellaneous fish in ponds
Usually, when we release water into the pond, it is inevitable that small fish will enter the pond, and many fish eggs are even more difficult to prevent. Furthermore, if rice paddies are converted into shrimp ponds, there will be many loaches, eels, and other fish that live in the rice paddies for a long time. Even if you do a good job in the preliminary treatment, their residual eggs will still exist in the soil. These are possible reasons for the existence of wild miscellaneous fish in our pond. In the case of small quantities, as long as there are no carnivorous fish present, there is no problem of not cleaning up. If the quantity is a bit too large, you can use a net to catch it, and if the quantity is even larger, you can use medication to remove wild miscellaneous fish.
6. Fishing for parent shrimp and separate pond farming
Before and after the Qingming Festival, crayfish were carefully raised for a period of time, and the young shrimps were basically separated from their mother's body. Therefore, we can catch and market the parent shrimps or raise them in separate ponds. Relatively plump parent shrimps can now be listed on the market, while those that are relatively thin and weak can continue to be raised in separate ponds, which can ensure the rapid growth of young shrimps and avoid the phenomenon of large shrimps eating small shrimps due to factors such as high density. It can reduce the cost of aquaculture and increase the economic benefits of aquaculture; It can also facilitate feeding and management, improve the survival rate of young shrimp, promote parent shrimp fattening, and be launched as soon as possible.