Five key measures for Crab Culture

Beware of bait

Feeding should be based on high-quality pellet feed, chilled fish and soybeans, and try not to throw powdered feed as far as possible to reduce pollution to the water body. Feeding should be appropriately increased or decreased according to the seasonal weather and the growth activities of river crabs. During the shelling period of river crabs, nutritional additives should be added to the feed to ensure the normal shelling and growth of river crabs.

Morning dry pond

Generally in January every year dry pond, dry pond after the pond edge silt repair, drying pond time should not be too long, generally in 10-15 days, a little hard can, so as to reduce the damage to aquatic plants and benthos in the pond mouth, and maintain the original ecology of the pond mouth.

Dense planting of grass

In the early stage, Tangkou is required to be recommended to plant foot grass and manage grass in the middle: first, excessive water color affects the photosynthesis of aquatic plants, so water should be transferred in time. Second, the water quality is muddy, and the pollutants attached to aquatic plants should be removed by using water purification biological agents in time. Third, water plants withered, lack of activities should be timely topdressing, the late control of pond water plants cover the number of about 60%, the emergence of water plants to cut off the old grass to make river crabs grow healthily in a good ecological environment.

Multi-snail

It is used for many times to prevent a large amount of one-time input, resulting in thin water quality and mass reproduction of moss in the early stage. A batch of snails with a quantity of 300 jin / mu were put in before the Qingming Festival, and gradually replenished by the end of June, the amount of snails was 500 jin / mu, which adjusted the water quality of the pond, was beneficial to the natural proliferation of snails and ensured sufficient natural live bait in the ponds in the middle and later stages of culture.

Water regulation

August is a high temperature period and a seasonal exchange stage. In order to properly reduce the temperature in the water body and minimize the temperature difference, the pond should maintain the highest water level, often add and change water, add new water once in 2-3 days and change water once in 7-10 days. Water addition is carried out in the early morning or morning, not in the evening. Regularly use microbial preparation once every 7-10 days to adjust the water quality and keep the water fresh at any time, so that the river crab can reduce casualties and ensure the survival rate in the high temperature season.