How to breed crabs with high yields? How large scale crabs are farmed

First, it depends on your site, which is the quality of the soil and water of your site. Second, it's to look at your seedlings, which are many kinds of crabs. Thirdly, look at your oxygen for this breeding.

Fourth, it depends on the quality of what they are eating. Fifth, it depends on the polluted environment around you.

Breeding environment: Crabs should be farmed using a glass tank as a vessel, and the bottom should be covered with fine sand and stones, and then river or lake water should be poured into the tank.

River Crab Farming Techniques:

1. Choose a pond with good water quality and sufficient water source: the pond with good water quality and sufficient water source is convenient for injection, drainage, no water leakage, no water seepage, and less silt, the area should not be too large, the water depth should not exceed meters, the pond shape is good from east to west, the sun is full of early eggplant, and the construction of greenhouses can refer to the construction method of agricultural vegetable greenhouses;

2. 15 to 20 days before the spring crab seedlings are put into the mold, 75 kg of quicklime is sprinkled and disinfected per mu, and after the medicinal properties disappear, the water is fed with an 80-mesh filter screen, the basic bait is cultivated, the aquatic plants are transplanted, and the necessary anti-escape facilities are set up. Crab seedlings can be shallow when entering the pool. It is beneficial to improve the water temperature and the growth of algae and aquatic plants in the water.

Feed the bait 2 to 3 times a day;

3. The growth of juvenile crabs should also be increased with some plant bait, such as: duckweed and other high-quality aquatic plants, pay attention to water quality regulation in daily management, master the water quality fertilizer and cool, change the water frequently, do not cause drastic changes in water temperature and water level.

River Crab Farming Techniques:

1. Choose a pond with good water quality and sufficient water source: convenient injection and drainage, no water leakage, no water seepage, and less silt, the area should not be too large, the water depth should not exceed meters, the pond shape is good in the east-west direction, the sun is sufficient, and the construction and closure of greenhouses can refer to the construction method of agricultural vegetable greenhouses;

2. 15 to 20 days before the crab seedlings are released, 75 kg of quicklime per mu is used to sprinkle the disinfection sedan socks, and after the medicinal properties disappear, the water is fed with an 80-mesh filter screen, the basic bait is cultivated, the aquatic plants are transplanted, and the necessary anti-escape facilities are set up. Crab seedlings can be shallow when entering the pool. It is beneficial to improve the water temperature and the growth of algae and aquatic plants in the water.

Feed the bait 2 to 3 times a day;

3. The growth of juvenile crabs should also increase some plant-based bait, such as: duckweed and other high-quality aquatic plants, pay attention to water quality regulation in daily management, master the water quality fertilizer and cool, change the water frequently, and do not cause drastic changes in water temperature and water level.

1. Pond preparation.

Breeding ponds should be selected in a place with abundant aquatic plants, clean and clear water quality, and plenty of sunshine, and anti-escape equipment should be set up around the pond, and in order to reduce the incidence of diseases in the breeding process.

2. Select seeds and put seedlings.

In the stocking crab seed to let the crab seedlings first temporarily raise for a period of time, in order to let the crab seedlings have an excessive adaptation period, set up a temporary area in the pond, pay attention to the stocking density, the density should be moderate, to ensure the normal growth and development of river crabs, the stocking time is generally around the beginning of spring.

3. Feed feeding.

After stocking crab fingerlings, when the water temperature in the pond reaches 11 degrees Celsius and above, it needs to be fed manually. After August, it is necessary to start to increase the amount of animal meat feeding, the main purpose is to promote the gonadal development of river crabs and increase the weight of river crabs.

4. Water quality management.

When stocking crab fingerlings, it is necessary to ensure that there is a certain fertility in the water, and the fertility cannot be reduced, so water should be added at least once a week in the breeding. Each time you change the water, you don't need to change the whole pool water, you can change about 30%, and you also need to splash quicklime regularly. It's about once every 15 days.

1. First of all, if you want to breed hairy crabs, you must first select a water area to breed, generally lake aquaculture is the best, you can dig a pond on the edge of the lake to breed, for example: hairy crabs in Yangcheng Lake are basically cultivated in this way, dig a pond on the edge of Yangcheng Lake to breed, and the rest of the water is Yangcheng Lake.

2. When breeding hairy crabs, you need to buy a batch of small hairy crabs for breeding, and generally choose hairy crabs with better quality, especially when breeding hairy crabs for the first time, the mortality rate will be much lower, which needs to be understood.

3. When breeding hairy crabs, it is necessary to feed, otherwise it is basically difficult for hairy crabs to grow up, generally, you can buy some small fry to give hairy crabs to eat, they prefer to eat small fish, small fish are best alive, otherwise buy dead fish, which is easy to lead to the death of hairy crabs.

4. When breeding hairy crabs, especially when there is more rain, it is necessary to drain the water, and generally make a good guardrail in the drainage, otherwise the hairy crabs are easy to run away, and if they are not drained, it is easy to cause the water to be turbid and lead to the death of hairy crabs.

5. Then, when breeding hairy crabs, it is also necessary to put some aquatic plants in the water, which can improve the environment of the water and make the water not so turbid, otherwise it is easy to cause the hairy crabs to die.

6. Finally, when breeding hairy crabs, it is necessary to salvage in the appropriate season, generally from September to November, the crab roe of hairy crabs at this time is the most, generally at this time, when many people eat hairy crabs, that is, when they sell them, and then put small hairy crabs to continue breeding.