What are the requirements of Roots blower for hairy crab aquaculture?

It is better to start the Roots blower for aquaculture from early morning to early morning for oxygen supply, because the oxygen content in the water environment is the lowest at this time. The river crabs live in seclusion or caves during the day and come out for food at night. Likes clear water, sufficient dissolved oxygen and abundant water; It is very obvious to hate fertilizer and sewage, fear oxygen deficiency, and avoid poor water quality. Like weak light, afraid of strong light, like quiet, afraid of alarm.  

When the water temperature is higher than 10 ℃, food begins to be ingested, molting grows at about 15 ℃, and the growth period is 20-28 ℃. High temperature can inhibit the feeding, growth and molting of river crabs. The adult crab breeding pool should try to meet the above requirements for the living habits of river crabs, so that they can live in an environment similar to the natural conditions. Crab breeding ponds need to meet the following conditions:

(1) Location

Convenient transportation, quiet environment, sunny leeward.

(2) The water quantity is abundant, the water quality is good, and the drainage and irrigation are convenient.

(3) The area is generally 5-10 mu. The area is too small, the water quality is not easy to form a stable, and the management of too large enterprises is inconvenient. (4) The water depth is 1.5m, and the water depth is 1-1.2m.

(5) Pond slope 1:3. It can greatly reduce the number of burrowing crabs.

(6) The pond is a rectangle with a length width ratio of 5:3.

(7) The soil pool is wide, the soil is tight, and the loam is good. The pond does not leak, and the sludge at the bottom of the pond does not exceed 5cm.

Roots blower increases dissolved oxygen: what should we pay attention to when breeding crabs?

Crab can not be lack of a water plant, which is one of the source of nutrients for crabs. It is also the place where crabs live, hide and molt their shells. It can also purify, stabilize and develop water quality and improve sediment. {Common water hyacinth, leaf black algae, goldfish algae, aquatic flowers, bitter grass, etc

Crabs need more water than fish. The pH value of crab pond water is kept between 7 and 9, and the optimal pH value is 7.5 to 8.5. The dissolved oxygen in crab pond water is kept at 5mg/L. Quicklime is sprayed regularly to improve the water quality.

The following things should be done when the weather is hot and the water temperature is high.

1. There are enough water plants

2. Ensure the quality of fresh water

3. Pay attention to food quality

4. Prevent disease.

Crab larvae must be raised and reared temporarily in front of the pond, which can adjust the osmotic pressure ability, adapt to the new environment and feeding ability. So you can increase your activity rate.

The adult crab pool cannot nest the current year's young crabs. If they are nested, most students will be eaten by the 2-year-old crabs, and the survival rate is low.

Generally, the choice of catching crabs at night is related to the living habits of crabs. As the saying goes, "When the west wind rises, the crab's feet itch".

When selling crabs, they should be tied together to reduce activities and energy consumption to avoid becoming thinner. It can also prevent leg and foot injuries.