During wintering in fish ponds, fish species often cause a large number of deaths due to lack of oxygen. Therefore, it is an indispensable and important part of improving fish breeding efficiency to strengthen the management of aerobic oxygenation during the wintering period. After measuring the oxygen deficit in the fish pond, oxygenation measures should be taken immediately. The specific oxygenation methods include: 1. Water injection and oxygenation: Inject water with higher oxygen content or new water that has undergone a period of significant increase in dissolved oxygen into overwintering fish ponds. We must resolutely prohibit the direct withdrawal of fresh water from the well into the pond without dissolving oxygen for a period of time. 2. Cyclic Oxygenation: In the absence of water sources, the oxygen-deficient water in the overwintering fish ponds can be pumped out by force, so that the water and air are fully exposed to dissolved oxygen, so as to increase the dissolved oxygen in the pool water, and then re-injected into the fish pond. 3, mechanical oxygenation: the use of oxygen aerator, oxygen quickly spread from the upper to the lower layer, so that the lower organic decomposition, so that the upper and lower layers of water to accelerate the cycle, so as to enhance and improve the pool of oxygen.
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