High-quality Culture techniques of hairy Crab

Seedling preparation

When using a net to prevent escape, sterilize and disinfect the pond, remove too much silt, leaving only about 10 cm of silt, and sprinkle it with quicklime throughout the pond, with a dosage of 200 Mu 250 kg per mu, in order to achieve thorough pond disinfection, remove impurity, kill germs, and improve the bottom quality. 7 days after the drug, that is, water once, to remove the dirt, and then add water 5 days after drying the pond. Plant aquatic plants well

In order to cultivate hairy crabs, we should first plant aquatic plants, which is one of the natural bait of hairy crabs, and can play a good role in purifying water quality, and it is also a place for hairy crabs to perch and avoid enemies. It is mainly algae. You can also put in an appropriate amount of field snails.

Rational stocking

The crab seedlings should be disinfected before release, separated evenly according to size, and put in the water with a purse seine, so that the crabs can adapt to the environment for 1 month before the purse seine can be removed. In general, crab breeding should achieve the principle of "three suitability" and "one temporary breeding". That is, appropriate density, timely stocking, moderate specifications and temporary stocking before stocking. When stocking, the water should not be too deep, it is appropriate to use 1.5 Mel 2 meters, and the temperature should be 25 degrees 20 Mel.

Stocking density

In the environment of luxuriant water plants and fresh water quality, the general specification is about 300 per mu, so that hairy crabs have a sufficient living and growing space. The stocking time of crab species is generally from the end of February to March every year. If the crabs are released prematurely, the overwintering casualties will be more serious, the water temperature will rise too late, and some river crabs will molt, which will affect the survival rate of the lower pond.

Daily pond patrol

The main purpose of patrolling the pond in the morning is to check whether there is residual bait in order to arrange the bait for that day; at noon, the main purpose of patrolling the pond is to measure the water temperature and observe the color of the water and the changes of the water; and in the evening and night, the main purpose of patrolling the pond is to observe the activity and eating of river crabs, and take timely measures to find problems.