CATDOLL : CATDOLL: How to increase oxygen in high-density fish ponds

How to increase oxygen in high-density fish ponds

The physical method is a method of increasing oxygen by using the physical characteristics of oxygen in the process of dissolving into water, through mechanical, artificial or other means, to increase the rate of oxygen dissolving into water and increase the dissolved oxygen in water. It is also the most widely used method at present.

1. The aeration type is also called the diffusion type. It releases air or prepared pure oxygen into tiny bubbles through a diffuser. The small bubbles transfer mass with water during the rising process, so that the oxygen slowly dissolves into the water body and becomes dissolved oxygen. This method is widely used in current factory farming.

2. Mechanical type: It uses mechanical power to increase the contact area between water and air, so that the water and air are in full contact, thereby promoting the oxygen in the air to dissolve into the water to achieve the purpose of oxygenation. The impeller aerator and waterwheel aerator widely used in pond fish farming belong to this type.

High-density farming generally chooses Roots blower as oxygen supply equipment. Roots blower bottom microporous aeration oxygenation has great advantages in high-density farming, small size, easy maintenance, affordable price, high oxygen supply pressure

How to breed bighead carp at high density?

Bighead carp is also known as silver carp, fathead fish, bighead fish, and black carp.

Farming technology

Seedling stocking:

In the past, the stocking specifications of bighead carp in lakes and reservoirs were generally large-sized fish of about 13.2M. Under modern technical conditions, the requirement is 0.15-0.5 kg/fish or even 1.0 kg large-sized fish.

Stocking time: It should be carried out in winter or early spring when the water temperature is 5-10℃. This is conducive to high-density transportation of fish species, which can reduce casualties during transportation; the activity of fish species and ferocious fish is weakened, and the harm of ferocious fish to stocked fish species is relatively reduced.

Stocking location: A fertile bay upstream of the reservoir that is shallow, sheltered from the wind, and facing the sun should be selected. In this way, away from the spillway and flood discharge tunnel downstream of the reservoir, the escape chance of stocked fish can be reduced, the adaptation time to the large water surface environment can be shortened, the growth can be accelerated, and the survival rate can be improved.

Free-range weather: Choose a sunny day, and avoid free-range on windy, snowy or icy days.

Quarantine and disinfection: Fish disease quarantine and disinfection must be carried out before stocking fish into the warehouse. It is strictly forbidden to stock fish with infectious diseases into the warehouse.

Careful operation: After the long-distance transport of fish fingerlings to the reservoir, the reservoir water should be slowly added to the fish container. When the temperature difference between the container and the reservoir water is not large, the fish fingerlings can be slowly released into the reservoir. After the fish fingerlings are released into the reservoir, the stocking personnel should also stand by the reservoir or on the boat, gently stir the reservoir water with a paddle, and slowly drive the fish fingerlings to swim to the large water surface.

Farming mode:

The traditional ratio of silver carp and bighead carp is 3:1, that is, 3 silver carp and 1 bighead carp, which are 75% and 25% respectively.

According to production practice, in the stocking structure of silver carp and bighead carp, when the proportion of bighead carp is less than 20% or the proportion of silver carp is greater than 80%, the growth rate of bighead carp is faster. When the stocking ratio of silver carp is between 20% and 80%, the growth rate of bighead carp will be inhibited. When bighead carp is used as the main fish, silver carp should be stocked in small quantities or not at all.

Water quality control:

There are three main functions of regulating water quality:

First, it improves water quality. After the beneficial bacteria in the microecological preparations enter the water body, they exert their oxidation, ammoniation, denitrification, phosphorus solubilization, sulfidation, nitrogen fixation and other functions, and quickly decompose organic matter such as animal excrement, residual feed, and animal remains, effectively reducing the concentration of ammonia nitrogen and nitrite in the water body;

Secondly, the salts after the decomposition of organic matter provide a good ecological environment for the growth and reproduction of unicellular algae, and provide nutrition for the growth and reproduction of unicellular algae. The photosynthesis of unicellular algae provides dissolved oxygen for the oxidation and decomposition of organic matter and the respiration of cultured organisms, forming a benign ecological cycle, maintaining and creating good water quality conditions, and being able to maintain the stability of water quality for a long time, so as to achieve water-fertilization and stability, which is conducive to the healthy growth of cultured objects. At the same time, it can also increase the number of zooplankton and beneficial algae in the culture water, expand the source of bait, and reduce production costs.

The third is disease prevention. The beneficial bacteria of microecological preparations are added to the aquaculture water, which not only compete and exclude pathogens, maintain the ecological balance of the microecological flora in the water, and prevent aquatic organisms from being invaded by pathogens and becoming ill, but also produce antibacterial substances and a variety of immune-promoting factors, activate the body's immune system, strengthen the body's counter-reaction, enhance the ability to resist diseases and improve the survival rate.

Seedling stocking:

In the past, the stocking specifications of bighead carp in lakes and reservoirs were generally large-sized fish of about 13.2M. Under modern technical conditions, the requirement is 0.15-0.5 kg/fish or even 1.0 kg large-sized fish.

Stocking time: It should be carried out in winter or early spring when the water temperature is 5-10℃. This is conducive to high-density transportation of fish species, which can reduce casualties during transportation; the activity of fish species and ferocious fish is weakened, and the harm of ferocious fish to stocked fish species is relatively reduced.

Stocking location: A fertile bay upstream of the reservoir that is shallow, sheltered from the wind, and facing the sun should be selected. In this way, away from the spillway and flood discharge tunnel downstream of the reservoir, the escape chance of stocked fish can be reduced, the adaptation time to the large water surface environment can be shortened, the growth can be accelerated, and the survival rate can be improved.

Free-range weather: Choose a sunny day, and avoid free-range on windy, snowy or icy days.

Quarantine and disinfection: Fish disease quarantine and disinfection must be carried out before stocking fish into the warehouse. It is strictly forbidden to stock fish with infectious diseases into the warehouse.

Careful operation: After the long-distance transport of fish fingerlings to the reservoir, the reservoir water should be slowly added to the fish container. When the temperature difference between the container and the reservoir water is not large, the fish fingerlings can be slowly released into the reservoir. After the fish fingerlings are released into the reservoir, the stocking personnel should also stand by the reservoir or on the boat, gently stir the reservoir water with a paddle, and slowly drive the fish fingerlings to swim to the large water surface.

Farming mode:

The traditional ratio of silver carp and bighead carp is 3:1, that is, 3 silver carp and 1 bighead carp, which are 75% and 25% respectively.

According to production practice, in the stocking structure of silver carp and bighead carp, when the proportion of bighead carp is less than 20% or the proportion of silver carp is greater than 80%, the growth rate of bighead carp is faster. When the stocking ratio of silver carp is between 20% and 80%, the growth rate of bighead carp will be inhibited. When bighead carp is used as the main fish, silver carp should be stocked in small quantities or not at all.

Water quality control:

There are three main functions of regulating water quality:

First, it improves water quality. After the beneficial bacteria in the microecological preparations enter the water body, they exert their oxidation, ammoniation, denitrification, phosphorus solubilization, sulfidation, nitrogen fixation and other functions, and quickly decompose organic matter such as animal excrement, residual feed, and animal remains, effectively reducing the concentration of ammonia nitrogen and nitrite in the water body;

Secondly, the salts after the decomposition of organic matter provide a good ecological environment for the growth and reproduction of unicellular algae, and provide nutrition for the growth and reproduction of unicellular algae. The photosynthesis of unicellular algae provides dissolved oxygen for the oxidation and decomposition of organic matter and the respiration of cultured organisms, forming a benign ecological cycle, maintaining and creating good water quality conditions, and being able to maintain the stability of water quality for a long time, so as to achieve water-fertilization and stability, which is conducive to the healthy growth of cultured objects. At the same time, it can also increase the number of zooplankton and beneficial algae in the culture water, expand the source of bait, and reduce production costs.

The third is disease prevention. The beneficial bacteria of microecological preparations are added to the aquaculture water, which not only compete and exclude pathogens, maintain the ecological balance of the microecological flora in the water, and prevent aquatic organisms from being invaded by pathogens and becoming ill, but also produce antibacterial substances and a variety of immune-promoting factors, activate the body's immune system, and strengthen the body's counter-stimulation.