Running water culture technique of bullfrog

With the continuous development and improvement of the aquaculture industry, the technology of aquaculture is constantly updating and improving, so if you want to get the wealth you want in the aquaculture industry, in addition to paying a certain amount of hard work, we should also constantly pay attention to the pace of social development and understand some new aquaculture techniques.

Running water culture technique of bullfrog

1. Select a site

General requirements of breeding farms: adequate water sources, convenient drainage and irrigation; no pollution, up to fishery water quality standards; warm in winter and cool in summer, away from noise; convenient transportation and adequate power supply to facilitate aquaculture production. Among them, the condition of water source is the key to the success or failure of raising frogs.

2. Build frog ponds

Take each 100m2 as a large pool, and then divide each large pool into four small pools on average. The edge of the pool should be surrounded by 40-mesh sieve silk mesh, the sieve silk should be 1m higher than the bottom of the pool, and the bottom of the sieve silk should be 20-30cm buried in the soil; the ridge of the pool should be 40cm, the slope is 1 ∶ 3, the water level should be kept at 30-40cm, and the depth of the water layer should not be lower than 20cm, otherwise the water storage is too small, the water is easy to be muddy, and bullfrogs are easy to get sick; it is appropriate to use a rectangular pool for easy operation. The plastic pipe of caliber 10-12cm is used as the water supply and drainage pipe, and the location of the inlet and overflow hole should be at the opposite corner of each large pool; four 80 × 40cm floating white foam boards are placed in each small pool as the bullfrog's rest platform; the top of the pool is shaded by a black sun net to prevent summer sun exposure.

3. Stocking

Before seedling release, the dry pond was disinfected with 50-75kg per mu of quicklime or bleach 10-15kg (the content of available chlorine was about 30%). Generally, the seedlings can be released after 10 days of pool disinfection. Young frogs can be washed with 20ppm's potassium permanganate solution for 10 minutes for 20 minutes before stocking. There should be personnel present to observe when soaking, and the frog seedlings should be taken out immediately when they find abnormal conditions. The stocking density of young frogs was 60 / m ~ 2, and with the change of individual difference, the stocking density of adult frogs was 30 ~ 40 / m ~ 2.

Feeding and management of bullfrog

1. Inspect the pool

Every morning, in the evening, each patrol the pool, check whether there is a hole in the sieve net, if there is damage, it must be repaired immediately to prevent bullfrogs from escaping, and ensure 24-hour uninterrupted water flow, with a water exchange rate of at least 300% every day; the overflow can be controlled by the rise and fall of a plastic tube to keep the water depth at 30-40cm and keep the water quality fresh. It should also be observed that if there are any abnormalities in bullfrog feeding and activity, corresponding treatment measures should be taken in time.

2. Feed feeding

Mainly floating compound feed, soak the formula feed with clean water half an hour before feeding, so that the feed can be slightly softened and expanded, which can prevent the bait from absorbing the sewage in the pond and eliminate gastrointestinal diseases after bullfrog eating. it can also promote the absorption of nutrients by bullfrogs. The daily feed intake is kept at 715% of the frog's body weight. In addition to being calculated according to the frog's body weight, the daily feed intake should also be adjusted according to the climate, water quality and residual bait. It is appropriate to finish the meal within half an hour.

3. Graded feeding

In the process of bullfrog feeding, in order to prevent the phenomenon of cannibalism, individuals with large differences in specifications are screened and graded at regular intervals, and bullfrogs with the same specifications are adjusted to the same pool for breeding, so as to prevent big frogs from eating small frogs. at the same time, pay attention to control the breeding density.

4. Prevention and treatment of diseases

In the process of bullfrog breeding, it is necessary to give priority to prevention and the combination of prevention and control. Disinfect the pond before stocking, disinfect the enemy with quicklime or bleach powder to kill enemy organisms and pathogens; regularly sprinkle the whole pool with bleach or strong chlorine; disinfect the frog body with potassium permanganate of 20ppm in time after dividing the pond to prevent mechanical damage from spreading pathogens; find out and isolate the sick frogs and dead frogs in time, in addition, disinfect the tools with high concentration of bleach or potassium permanganate solution. Control the reasonable culture density. Bait feeding to achieve "four fixed", that is, fixed point, timing, quantitative, qualitative. When raising adult frogs, there are individual crooked heads and red legs. Pick out and isolate the crooked head bullfrogs in time, disinfect them with 15ppm's strong chlorine for 5 days, and increase the amount of water exchange at the same time.

Nutritional value of bullfrog

Many people like to eat bullfrogs, which also shows that the nutritional value of bullfrogs is very high, and in production, it is also very simple, when eating, we should also pay attention to its production is very important, different production methods, so that bullfrogs have different reservations in nutritional elements, and play different roles in improving the development of all aspects of the body, so it is also a good choice for production.

Bullfrog has many aspects of nutritional value, and some of its effects are more, for those of us who often eat, in all aspects of the body, it has a very good promoting effect, in strengthening the physique, the effect is also very good. Bullfrogs also have the effect of nourishing and detoxifying. People with poor digestive function or excessive stomach acid and people with weak physique can be used to nourish the body. Bullfrog can promote the exuberant qi and blood of the human body, energetic, nourish yin and yang, nourish the mind and calm the mind and replenish qi, which is conducive to the rehabilitation of patients.

The viscera and scraps of bullfrog are rich in protein, which is hydrolyzed to form compound amino acid. Among them, the content of arginine acid and lysine is high, which is a good food additive and tonic. Hydrolyzed compound amino acid, separated and purified, used in medicine and cosmetic industry. The endocrine system of bullfrog secretes various hormones, which can be used in medicine, industrial production and scientific research. For example, pituitary hormones are used as artificial labor-inducing agents for fish and amphibians, which are beneficial to artificial reproduction.

The stomach gland, intestinal gland and pancreas of bullfrog are rich in digestive oysters, especially those of hydrolyzed protein, which can be extracted and used. The bile of bullfrog is extracted and can be used as medicine after processing. Frog skin can be used as an excellent raw material for surgical line. Frog oil can be used to make advanced lubricating oil.

Key points of bullfrog culture in summer

1. Increase the amount of bait

With the increase of temperature, the food intake of bullfrogs increases, reaching the peak from July to August, and the feeding amount should also be gradually increased to avoid the law of the jungle in the breeding pond, which should generally reach about 20% of the total body weight of frogs.

2. Strengthen the treatment of water quality

If the temperature is high in summer, the water quality will deteriorate easily. In order to keep the water quality of bullfrog ponds fresh, fresh water should be injected frequently according to the water quality.

3. Do a good job of shading and cooling

The most suitable temperature for bullfrog growth is 18-28 ℃. Therefore, shading and cooling should be done well in summer. Some aquatic plants such as lotus root can be cultivated in the pond, and some vines such as grapes and towel gourd can be planted by the pond to promote the rapid growth of bullfrogs.

4. Do a good job of escape prevention

There are many strong winds and rains in summer, and bullfrogs will climb over barriers or dig holes to escape after being frightened, so special attention should be paid to escape prevention in this weather.

5. Do a good job in clearing the enemy

Snakes, rats and cats are all natural enemies of bullfrogs, and these natural enemies are particularly rampant in summer, so it is necessary to establish an inspection system and take measures to eliminate them.

6. Do a good job in disease prevention

Summer is the season of frequent occurrence of bullfrog disease. The feed table should be cleaned every day, the spoiled bait should be removed in time, and the whole pool should be disinfected with bleach every half a month to make the water concentration reach 1ppm. Once the bullfrog is found to be sick, treatment measures should be taken as soon as possible to prevent the disease from spreading.

Bullfrog is more common in our life, but also often eat a delicious, bullfrog meat is very nutritious, and the taste is very good, which is why many people love bullfrog. Therefore, the market demand of bullfrog is gradually increasing every year.