CATDOLL : CATDOLL: What should you pay attention to when putting fish fry in a new fish pond?

1. What should I pay attention to when putting fish fry in a new fish pond?

When releasing fish fry into a new fish pond, you must pay attention to disinfection, nutrients, release time and management, etc. Before releasing the fish fry, it is necessary to disinfect with quicklime, and then apply fertilizer to cultivate plankton. The best time to release the fish fry is around March-April each spring. After that, the fish pond must be oxygenated in time so that the fish fry can grow healthily.

Precautions for placing fish fry in a new fish pond 1. Pay attention to disinfection

When releasing fish fry into a new fish pond, it is necessary to pay attention to disinfection, because there are a large number of bacteria in the newly dug pond. If it is not disinfected, the fish fry will easily get sick after being released. Generally, 50 kg of raw stone fern ash can be mixed with water and sprinkled into the pond per acre. After that, it can be disinfected after drying for a few days.

2. Pay attention to nutrients

There is insufficient nutrients in the new fish pond, and the fry cannot grow vigorously. Therefore, before releasing the fry, you need to apply fertilizer first. It is best to apply 500 kg of fermented manure per acre, and then fill water to cultivate plankton for the fry to eat. After a stable ecological environment is formed in the water, you can release the fry.

3. Pay attention to time

When releasing fish fry into a new fish pond, you also need to pay attention to the time. Fish fry generally like to grow in a warm environment, so it is generally best to release the fish fry in March or April when the water temperature is stable at around 10℃. Otherwise, if the fish fry are released too early, they will easily grow poorly.

4. Pay attention to management

The ecological environment of a new fish pond is generally not very stable, so when releasing the fry, you must pay attention to the water quality and adjust it reasonably according to the growth of the fry and the water quality. If necessary, you also need to add oxygen to it, otherwise the oxygen content in the water will be too low and the fry will easily die on a large scale.

2. How should the seedlings in the black carp pond be cultivated?

Since their seedlings are very small, how to cultivate them is a headache. The pre-breeding methods are provided for teachers' reference. In order to grow, small seedlings must be given good feed. Soy milk is a very good feed, suitable for newly hatched seedlings. It can be put in four times a day, and the amount depends on the number of fish. In addition to soy milk for seedling feed, there is also egg yolk. Yes, it is egg yolk. Put the eggs in water and boil them in a pot. After about 10 minutes of boiling water, boil the eggs, remove the cold water, cool, peel and remove the nucleus to remove the egg white. The egg white can be eaten, leaving the egg yolk. Mix all the egg yolks with appropriate water and put them directly into the fry pond, once a day in the morning.

Young fish are small, and the endangered fish species include kingfishers, eels, crayfish, white dew, white wax and various water birds. To prevent thousands of years, call the digging gray dew water solution at about 1.5 meters, which can be used as a precaution. Eels and crayfish can be processed in the pond, or they can be placed in cages in the pond, etc. Kingfishers are difficult to prevent, and nets can be cast around the fish pond, up to four meters high. In addition to the above methods to prevent harm, you can also make a fake drive, that is, a scarecrow. When there are birds near the fish pond, the wind blows the scarecrow to scare away the birds. For seedlings, be careful. When the fry grows to 0.2 to 0.5 catties, you can feed the pond. Choose small fish-sized particles. The general particle packaging bag has instructions. Put it in the bag according to the number of fish, and you can feed it three to four times a day.

In fact, for this kind of fry, its cultivation process and method are not much different from other omnivorous fry, and the fry stage is also based on the microorganisms in the edible water. During the frying process, the newly hatched fry should not be fed. Generally, it takes 24 hours for the fry to swim normally in the water. At this time, you can feed some flour or soy milk, egg yolk, etc.

But many times when the fry swim normally, they will be directly shot into the prepared breeding pond for aquaculture. This pond is planned very early. The most abundant plankton is when the fish comes down in the water. They eat soy milk or high-content protein powder, protein powder several times a day, and pay attention to changes in water quality to prevent excessive ammonia nitrogen in the water. Generally, a large number of zooplankton will appear on the right side of the pond for a week, so the feed for the fry may also be given priority with zooplankton, but during this period, attention should be paid to changes in water quality, because the water quality changes greatly after the reproduction of zooplankton, so attention should be paid to the cultivation of fertilizers and algae, otherwise the change in water quality after cleaning is also prone to problems.

1. Prepare the Pond

About a month before the fry are put into the pond, it is necessary to make the pond round, remove excess silt, repair the pond embankment and the inlet and outlet, fill the holes and cracks, remove weeds and other preparatory work. Use drugs to kill wild fish, pathogenic bacteria, parasites and other harmful organisms. The most commonly used drugs for pond cleaning are quicklime, bleaching powder, tea dregs and rotenone.

2. Fertilizer pond water

The fry feed on plankton and need to be fertilized and water-fertilized. However, due to the requirements of ecological green development, it is best not to use manure chambers to fertilize the fry. You can buy special fertilizer products for the water and feed them with powdered feed with more than 40 protein in the later stage.

3. Select fish fry

There are currently eight national seed farms. For more information, please refer to the table below:

4. Transport seedlings

To reduce transportation time, after the fry are transported to the destination, first put the fry bag into the fish pond, wait for about 20 minutes for the water temperature inside and outside the bag to be consistent, and then put the fry into the temporary holding box prepared in advance.

5. Stocking density

Fish fry are generally raised in a single species, with a pond area of ​​1-3 mu and a water depth of about 1.2 meters. From fry to summer flower, there are generally 100,000 fish/mu, and from black fish to Buyuanta summer flower, there are generally about 50,000 fish/mu.

6. Water injection method

The pond is filled with water in stages: the water depth is 50-60cm when the fry are put into the pond; water is added every 3-5 days thereafter, with 15-20cm of water added each time; water is added 3-4 times during the cultivation period, and finally added to the highest water level.

First, you should prepare a particularly large pond, clean the silt in the pond, kill the bacteria and parasites in the pond, add some soapy water to the pond, choose seedlings with strong virus resistance, and keep the water temperature above 23 degrees so that you can cultivate them.

First, put in a certain proportion of fish fry according to the area of ​​​​the water. Don't put them too densely. Keep the water clean and at a certain temperature, and then put in fish feed to feed them.

Grind the soybeans into soy milk and then spread it in the fish pond. Pay attention to the water quality, the outside temperature, and the light.

3. How many fish fry should be placed in one acre of fish pond?

One acre of fish pond can stock 400-840 fry. The reason why Shixiang has such a big difference is that the per-acre yield is different, and the stocking method is also different. If the per-acre yield is 700 catties, 400 fry need to be stocked, if the per-acre yield is 1000 catties, 560 fry need to be stocked, and if the per-acre yield is 1500 catties, 840 fry need to be stocked. It should be noted that the stocking of fry must be carefully matched.

Control the water temperature: When releasing fish fry, you must first control the water temperature. Fish fry are different from adult fish and cannot tolerate low temperatures, so the temperature should usually be kept between 20-25℃. Since they are transported, in order to avoid death after entering the pond, the bag containing the fish needs to be soaked in the pond water for 20-30 minutes.

Pay attention to the density: Although the fry are small, raising too many will reduce the survival rate, and raising too few will result in lower economic benefits, so you need to pay attention to the stocking density. This generally depends on the size of the fish pond and the type of fry. If the quality of the fry is good and the fish pond has sufficient bait, the stocking density can be higher.

Put the fry into the pond after they are fully fed: Before putting them into the pond, they should be fed with egg yolks. Putting them into the pond after they are fully fed can improve their foraging ability and also help them adapt to the environment. If they are put into the pond on an empty stomach, they will easily die.