The short photoperiod in winter, the photosynthesis of phytoplankton in the water is weakened, and the oxygen production is reduced, which will result in insufficient oxygen in the aquaculture water. In heavy snowfall in winter, if the snow on the pond ice surface is too thick, it will affect the metabolism and photosynthesis of plankton in the water, leading to a decrease in dissolved oxygen in the water. For this reason, after each heavy snowfall, the snow on the ice must be cleared in time to maintain the transparency of the ice, enhance the photosynthesis of the phytoplankton in the pond water, and indirectly increase the amount of dissolved oxygen in the pond water. The specific oxygen supplement measures include:
First, the biological oxygen method
Using underwater to adapt to low temperature and low light plankton, creating conditions to promote its reproductive growth, photosynthesis oxygen production, supplement the oxygen content of the wintering pool, to achieve the purpose of safe winter fish.
Second, water injection and oxygenation
Using water sources near the wintering pool of fish, in the absence of oxygen or water in the wintering pond, new water with high oxygen content is injected into the overwintering pool to increase the amount of water and oxygen in the overwintering waters.
Third, circulating water supplementation method
In the overwintering pool where there is sufficient wintering water or lack of overwintering water sources, after oxygen deficiency is discovered, the original pond water circulation method may be used to supplement oxygen, which mainly includes:
1. Use pump to pump water to replenish oxygen.
2. Oxygen supplementation using a slurry impeller. The use of circulating water supplementation method should be carried out in accordance with the principle of “early supplement, diligence, and supplementationâ€.
IV. Inflatable oxygen
Use a windmill or other power to drive the air pump to set the air pressure in the hose under the ice water, and let the air into small bubbles diffuse into the water through the sand filter to increase the oxygen content in the water.
Five, fight ice oxygen
Some dead water overwintering pools prefer to increase the oxygen content of the water during wintering through the use of ice eyes. Through experiments, it has been found that oxygen in the air diffuses slowly into the water. Therefore, it is necessary to combine other more effective methods of supplementing oxygen. At the same time.
Six, chemical oxygenation
For small deadwater wintering ponds and greenhouse wintering ponds, in the event of hypoxia, chemicals may be added to supplement oxygen.
VII. Biochemical oxygenation
Various light sources are used to promote photosynthesis of phytoplankton and increase oxygen. Iodine-tungsten lamps, high-power lamps, etc. can be used as light sources to promote biological oxygenation.
Eight, enhanced oxygenation
Force the stirring of oxygen and water in the air and transport high oxygen water to the wintering pond. For example, jet oxygen aerators, saturated oxygen aerators, etc., and an air intake pipe on the water pipe of the pump also have aeration effect.
IX. Other methods of nourishing
In addition, there are various oxygenation methods such as magnetization and oxygenation, actinic oxygenation, liquefaction and oxygenation, electrochemical oxygenation, physical and chemical oxygenation, and emulsification and oxygenation.
First, the biological oxygen method
Using underwater to adapt to low temperature and low light plankton, creating conditions to promote its reproductive growth, photosynthesis oxygen production, supplement the oxygen content of the wintering pool, to achieve the purpose of safe winter fish.
Second, water injection and oxygenation
Using water sources near the wintering pool of fish, in the absence of oxygen or water in the wintering pond, new water with high oxygen content is injected into the overwintering pool to increase the amount of water and oxygen in the overwintering waters.
Third, circulating water supplementation method
In the overwintering pool where there is sufficient wintering water or lack of overwintering water sources, after oxygen deficiency is discovered, the original pond water circulation method may be used to supplement oxygen, which mainly includes:
1. Use pump to pump water to replenish oxygen.
2. Oxygen supplementation using a slurry impeller. The use of circulating water supplementation method should be carried out in accordance with the principle of “early supplement, diligence, and supplementationâ€.
IV. Inflatable oxygen
Use a windmill or other power to drive the air pump to set the air pressure in the hose under the ice water, and let the air into small bubbles diffuse into the water through the sand filter to increase the oxygen content in the water.
Five, fight ice oxygen
Some dead water overwintering pools prefer to increase the oxygen content of the water during wintering through the use of ice eyes. Through experiments, it has been found that oxygen in the air diffuses slowly into the water. Therefore, it is necessary to combine other more effective methods of supplementing oxygen. At the same time.
Six, chemical oxygenation
For small deadwater wintering ponds and greenhouse wintering ponds, in the event of hypoxia, chemicals may be added to supplement oxygen.
VII. Biochemical oxygenation
Various light sources are used to promote photosynthesis of phytoplankton and increase oxygen. Iodine-tungsten lamps, high-power lamps, etc. can be used as light sources to promote biological oxygenation.
Eight, enhanced oxygenation
Force the stirring of oxygen and water in the air and transport high oxygen water to the wintering pond. For example, jet oxygen aerators, saturated oxygen aerators, etc., and an air intake pipe on the water pipe of the pump also have aeration effect.
IX. Other methods of nourishing
In addition, there are various oxygenation methods such as magnetization and oxygenation, actinic oxygenation, liquefaction and oxygenation, electrochemical oxygenation, physical and chemical oxygenation, and emulsification and oxygenation.
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Black Garlic Production Process
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