In the face of the drought that has not been encountered for 100 years, the drought in the region has continued until the beginning of May 2010. Although there have been a few light rains, the drought has not been resolved because severe droughts are likely to cause an outbreak of oxygen-depleted floating heads and fish diseases. Seed stocking and so on. Therefore, as aquaculture technology before the drought has not been resolved, we should pay attention to the following points:
1. Minimize feed feeding, reduce the amount of feed before the drought is eliminated, remove residual baits and debris in a timely manner, keep the current water environment in good condition, reduce the amount of fertilizer, and maintain good water quality. Herbivorous fish should reduce the feeding of concentrate feed to feed forage. Feather-based fish are mainly plankton in ponds, and other food-feeding fish should be eaten at 70%-80%. If they eat too much, the anti-stress and anti-anoxia abilities of adult fish will be relatively weakened. . Therefore, reducing the use of feeding to prevent diseases and flooding has played a very good role.
2. Strengthen water quality management. As the temperature gradually rises, the evaporation of the pool water is serious, so it is necessary to ensure that the pool is rich in dissolved oxygen and the aerator is turned on in time. At the same time, lime, photosynthetic bacteria and other microbiological agents are regularly spilled to make the water fresh. Daily observation should be made to observe the activities of fish and eating conditions, and abnormalities should be detected and treated in a timely manner.
3. Regularly disinfect the aquaculture water body disinfectant, and regularly add some oral immune drugs to the bait to prevent the occurrence of fish diseases. In the prevention and control of diseases, we must control the occurrence of diseases with the principle of "prevention first and prevention from overcontrol."
4. Strengthen pond management. During the dry period, the floating materials in the pond should be removed frequently, and the undecomposed impurities should be drained to avoid deterioration of water quality. To reduce the stocking density, commercial fish that can be marketed should be caught and listed as early as possible, and the amount of fish loaded should be reduced as much as possible to relieve the dissolved oxygen pressure in the pond. For fish species that are not listed, they can be well stocked or hoarded. Ensure that non-listed species survive through drought. At the same time, each farmer is required to increase the number of patrol ponds per day, pay attention to daily management, closely monitor changes in breeds, identify problems, and correctly deal with ingenious droughts.
5. For this year’s drought, avoid accumulating green manure in the pond or using human and animal manure and various efficient organic fertilizers to minimize the use of fertilizers.
Sun Dried Cut Kelp
Rongcheng Jingyi Oceanic Technology Company Limited , https://www.jingyifoods.cn