Culture of Monopterus Albus should prevent hypoxia in late Autumn

1. Cool down and increase oxygen. The water temperature is still high in late autumn, which will cause hypoxia in the water body. Can be built on the top of the eel pond, covered with straw shade, can also be planted around the pond vines, such as pumpkins, cucumbers, etc., let the vines climb to the top of the pond to shade, in order to reduce the water temperature.

two。 Inject water to increase oxygen. Every day, an appropriate amount of new water is injected into the eel pond, and the old water is discharged to make the pool water have sufficient dissolved oxygen.

3. Plants purify water and increase oxygen. Plant an appropriate amount of water hyacinth, water peanut, duckweed and other aquatic plants in the eel pond. These plants release a large amount of oxygen through photosynthesis and increase the amount of dissolved oxygen in the water.

4. Physically purify water and increase oxygen. Take 20 ~ 30 grams of quicklime per cubic meter of water and sprinkle it in the pool while it is hot, which can clear the pond for disinfection, improve water quality and increase the amount of dissolved oxygen in the water.

5. Photosynthesis increases oxygen. Iodine tungsten lamp or high power incandescent lamp was used as light source at night to promote photosynthesis of phytoplankton and aquatic plants in eel pond and increase the amount of dissolved oxygen in water.

6. Drugs increase oxygen. For eel ponds with high culture density, calcium peroxide or bleach powder was selected and 2 mg ~ 3 mg per liter of pond water was evenly sprinkled, and oxygen was released by chemical reaction.

7. Clear the pond and increase oxygen. Silt is the main oxygen consumption. Every year in late autumn and early winter or after Monopterus Albus comes out of the pond, the silt should be cleared in time and disinfected with 150 ~ 200 grams of quicklime per square meter.

8. Mechanical oxygenation. Conditional eel pond can be installed with aerator. In late autumn, the machine can be turned on for 1 hour to 2 hours in the early morning to increase the amount of dissolved oxygen in the water.