Winter fish pond oxygen supplement is more willing to grow in the coming year
In winter, when the fish species and the fish that have not reached the product specifications are pooled, the fish’s oxygen demand increases due to the increase in the density of the fish in the pond, and the water surface after freezing is closed. At this time, if the supplemental oxygen is not paid attention in time, it is easy. Causes fish to die, sometimes with serious losses. After anoxic fish, even if it does not die in winter, it will seriously affect its growth in the coming year, resulting in a serious reduction in production. Therefore, supplementing oxygen to fish in the winter can not only prevent the death of hypoxia, but also help the rapid growth in the spring of next year, thereby increasing the yield and increasing the benefits. Overwintering fish pond oxygen can take several effective methods:
Recirculating water injection and supplemental oxygen connects several nearby fishponds with cement pipes or plastic pipes, and uses machinery to pump water from one pond to another pond. The water bodies of several fish ponds form a cycle. After the water body flows, the contact with air increases, and the oxygen in the air dissolves into the water body, thereby increasing the amount of dissolved oxygen in the water body.
Applying organic fertilizer to overwintering fish ponds with 150-200 kg of organic fertilizer per acre can promote the growth and reproduction of phytoplankton, increase the photosynthetic capacity and temperature of pond water, and increase the oxygen content of water bodies.
Inject fertilizer and water to inject oxygen into the overwintering ponds. There are many phytoplankton in the fertilizer water, which can increase the dissolved oxygen in the water by increasing the photosynthesis.
Stirring the pond water to supplement oxygen In the severe winter season, the ice on the surface of the fish ponds can be broken and the bottom water of the ponds can be stirred. After the lower water is mixed with the upper water, the upper layer of dissolved oxygen is transported to the lower layer to supplement the oxygen in the lower water layer.
Regularly change water and supplement oxygen to choose warm and windless weather, and change the amount of water to one third of the pond water each time. It is advisable to pay attention to the temperature difference of the water can't exceed 3°C. The exchange of water can restore the balance of dissolved oxygen and nutrients in the water. Reduce icing in pond water.
After the severe ice formation of the ice-breaking and oxygen-filled fish ponds, the pond fish died of hypoxia suffocation or was frozen to death due to the obstruction of air circulation. If fish ponds break open in time after freezing, and then part of the new water is injected, the problem of freezing and lack of oxygen in fish ponds can be solved. In general, frozen ponds play about 30 cm in diameter and about 20 cm in diameter. Each serious ice pond hits about 40 cm in diameter and 25 cm in diameter. After the ice is broken, some fresh water is injected into the pond. better. Mild icing generally does not need to break ice, and timely inject proper amount of new water to prevent icing.
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