The wintering of ponds is an important part of the cultivation of sea cucumbers. If it is not done well, before and after the ice in spring ponds, diseases often occur, and even large-scale harvesting may occur. The key to such problems is the neglect of pre-winter management or the lack of control over winter management techniques. In order to increase the survival rate of overwintering, the author proposes the following suggestions, which are only for the reference of the vast sea cucumber farmers.
Improve the quality of water changes to maintain a higher water level
According to the water-changing condition of its own breeding ponds, pay attention to the use of good water changes during the lunar phase of the lunar calendar in November. Before changing the water, we must determine the salinity of the seawater and pool water. According to the salinity, we should change the water in appropriate amounts to maintain a high water level; under normal conditions From late November to early December, it is the ice-sealing time. During the flood season, the water is changed once a week before the ice closure. The pool water will be filled up to maintain the proper water level and improve the quality of pool water.
Improve pool water and sediment
In order to reduce or eliminate the damage of sea cucumbers after they pass winter, precautions should be put before freezing. On the one hand, disinfectants such as "Swift Force Killer" and "Green Safety" should be used to prevent disinfecting the body of water and prevent bacterial swollen mouths and skin formation during the wintering period of sea cucumbers. On the other hand, we must strengthen the improvement of the bottoms and focus on the use of different bottom modifiers to treat the bottom of the pool.
Enhance physical resistance to stress
The northerly wind weather in December, the temperature difference between day and night is relatively large. Sea cucumbers are easily stimulated by the frequent changes in water temperature, resulting in a disease of swollen skin. Therefore, it is necessary to timely launch the “Good Luck CCâ€, “Aquaculture, Stomach, Gastrointestinal Yeast†and other enhanced sea cucumbers to promote the safety of sea cucumbers.
Wintering.
Snow removal and detoxification
After the ice is sealed, the snow should be cleaned as soon as possible to increase the light intensity to facilitate the photosynthesis of plants under the ice. The dissolved oxygen in the ice water mainly comes from the photosynthesis of the algae, so it is best to clear the ice.
In order to maintain the balance of ice-water creatures, it is not easy to kill insects. In the past, in order to make the pool water clear and easy to pick and use, a large number of insecticides such as extermination and trichlorfon are used, and the practice of killing zooplankton in water is extremely undesirable. First, it is easy to "compound" the bottom of the pool, destroy the ecological environment, resulting in prosperous moss, planktonic algae difficult to cultivate; Second, the bottom of the pond is rich in organic matter, ice after water quality is more fat, will accelerate the formation of pool water-soluble oxygen stratification, Causes oxygen deficiency at the bottom of the pond and disease occurs. Third, the drug residue is too long, resulting in sea cucumber does not love feeding slow growth, so should pay attention to changing the water after killing the enemy to "good hydrolysis Po" for drug residue detoxification.
Timely and appropriate water supply
After the closure of the ice, according to the pond's influent conditions and water level drop conditions, the new water should be appropriately replenished on the premise of safety guarantees for gates, dams and other facilities to help break down the water layer phenomenon, but do not avoid passing over the ice surface. Secondary ice phenomenon.
Ice eyes
Before and after the beginning of spring, there are several ice eyes on the ice surface. On the one hand, harmful gas accumulated in the pool water can be released and air bubble disease can be prevented. In addition, water quality can be easily detected to observe the biological activity in the pool, and corresponding problems can be taken in time when problems are found.
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