How to manage lobster culture in paddy field in rainy days?

In rainy days, the following points should be paid attention to in the process of lobster culture in rice fields:

1, water quality control. Due to more rain and less light, the water is turbid and the oxygen content in the water is relatively low. Tangkou with oxygen-increasing facilities must open the oxygen-increasing facilities in time to ensure that the oxygen content in the water is sufficient and prevent losses caused by lack of oxygen. Tangkou without aeration facilities should be properly watered or changed to keep the water fresh and the dissolved oxygen sufficient. When the weather is clear, microbial agents and substrate improvers should be used in time to improve the aquaculture water quality.

2. Strengthen feeding. Because of abundant rain and relatively stable water temperature, it is suitable for the rapid growth of crayfish, and the season of large-scale disease has passed, so feed feeding should be strengthened at this time. For Tangkou, which adopts the culture mode of "one rice and one shrimp", the protein content of feed is only about 30% because there are not many shrimps in rice fields. In order to maintain the survival rate and promote the rapid growth of Tangkou, which adopts the culture mode of "two shrimps per meter", feed with high feed protein content can be properly fed in the first half of the month, and the feed protein is about 30% in the middle and late stage. The feeding amount shall be subject to a slight surplus 3 hours after feeding, and shall be adjusted in time according to the actual situation to ensure that crayfish can be fed adequately, without wasting feed and destroying water bodies.

3. Maintenance of aquatic plants. If the aquatic plants are too dense, the activities of crayfish will be reduced, which is not conducive to their feeding and growth. Once the aquatic plants are too dense, they must be removed in time, and the area of aquatic plants should be controlled at about 30% of the total area of the ring ditch. In particular, aquatic plants exposed to the water should be shaved in time, and rotten and aging aquatic plants should be removed in time to promote their germination for crayfish. Tangkou with insufficient aquatic plants should be replenished in time.

4. Disease prevention and control. Because of insufficient light, diseases are prone to occur. It is suggested that water should be thoroughly disinfected every 10 day. Povidone iodine is the best medicine. Please refer to the instructions for usage and dosage.

5. Strengthen fishing. Crayfish meet the market specifications, so it is recommended to catch them in time. First, reduce the number of ponds and reduce the risk of breeding; Second, it is beneficial to the rapid growth of shrimp in ponds; The third is to ensure the efficiency of farming.