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Pond wintering ten measures
When the pond's water temperature drops below 8°C, the fish enters the wintering period. During the wintering period, the fish rarely feed or stop feeding, the amount of activity is significantly reduced, the level of metabolism is reduced, and the growth rate is slowed down. But we cannot relax the management of fish as it enters the wintering period. Since the fish have stopped feeding during the winter, the disease resistance has dropped significantly. Therefore, it is very necessary to carefully manage the pond wintering period. 1. Fertilizer water quality. Before the winter, 100 to 150 kilograms of fermented cow manure is applied to every 667 square meters to fertilize the water quality. This is beneficial to increase the water temperature in winter ponds. 2. Deepen the pool water. Before icing on the surface of pond water, deepen the water level of the pond to the best depth, and check whether the inlet and outlet channels are unblocked. 3. Minimize the freezing period of pond water. Before the pond water surface is frozen, determine whether to enter or drain according to the temperature of the source water and the temperature of the pond water. Try to ensure that the pond water body has a higher water temperature and postpones the freezing time of the pond water surface. After the beginning of spring, we must diligently add water and diligently drain water. As soon as possible, discharge “ice water†with lower water temperature and add fresh water with higher water temperature to increase the water temperature of the pond and encourage the fish in the pond to eat as soon as possible. 4. Break ice and increase oxygen. When the ice surface of the pond water is frozen, it is necessary to play ice eyes, and insert the handles bundled with rice straw and corn stover in the ice eyes to facilitate ventilation and oxygen increase. Each 667 square meters of water can be played 2 to 4 ice eyes, ice eyes can put a small amount of soy cake, rapeseed cake and other fine feed, when the water temperature rises, the fish feed. 5. Sweep snow. After snow, the snow on the ice must be removed in time to ensure that sunlight can enter the water smoothly, enhance the photosynthesis of phytoplankton in the pond water, and indirectly increase the amount of dissolved oxygen in the pond water. 6. Keep a proper water level in the pond. When the pond water level drops too much and the pool water is too shallow, a sudden drop in water temperature is likely to occur. Therefore, timely refilling of new water, on the one hand, can ensure that the pond water body has a suitable water level and water temperature; on the other hand, it can play a role in improving water quality and increasing dissolved oxygen in water bodies. When water is added, care must be taken not to form double layers of water or even multiple layers of water, resulting in serious hypoxia in the pool of ice water, causing anoxic suffocation of fish. 7. Regularly monitor changes in water quality indicators. Determine the amount of dissolved oxygen in the water every 10 days or so and be aware of it. When the amount of dissolved oxygen is reduced, oxygenation measures should be taken in time, such as injecting fresh water and increasing the ice-breaking area. You can judge the water quality of a pond by observing whether there are fish swimming or not, whether the water is turbid and dirty, or whether there is odor in the water. If water quality deteriorates, appropriate remedial measures should be taken in time to improve the water quality. 8. Strengthen daily management. Each morning, evening, and evening, the ponds are inspected once and the changes in pond water color and fish activity are observed. It is forbidden to skate on the ice in the pond to ensure the stability of the surrounding environment. Clean up the dirt on the ice. 9. Timely release. Fish stocking should be conducted at noon on a sunny day with high temperatures, try to avoid wind and snow weather, and do a good job of disinfection of fish stocking. 10. Timely feed refeeding. After the temperature rises, the feed should be fed back in time to strive for “early food, early recovery, and early recovery.â€