Ecological breeding method of river crabs

Abstract

The invention relates to an ecological breeding method of river crabs. The ecological breeding method comprises the following steps: after draining water from a breeding pond, carrying out pre-treatment including sun exposure, fertilization and the like; then planting aquatic plants in the pond; transplanting shellfish and freshwater shrimps and carrying out intercropping; carrying out stocking: determining the stocking density according to a relation between a mass ratio and a quantity ratio; selecting individuals with ordered specifications and strong bodies; meanwhile, strictly grasping stocking specifications and stocking quantity. In a breeding process, water quality regulation and control need to be noticed to ensure that the pH (Potential of Hydrogen) value in water is slightly alkaline; the water is clean and has no pollution and the content of dissolved oxygen and the like in a water body is ensured. Pollution-free animal and plant baits are fed at proper time according to a food intake condition of the river crabs. According to the ecological breeding method provided by the invention, an ecological environment is excellent and the stocking density is reasonable; the rivercrabs have no diseases and antibiotic drugs do not need to be applied. By adopting the measures, the high-quality river crabs can be cultured and optimal economic benefits can be obtained.

Description

technical field [0001] The invention relates to a method for raising crabs, in particular to a method for ecologically raising river crabs. Background technique [0002] The scientific name of the river crab is the Chinese velvet crab. The culture of the river crab has a history of 100 years. Due to the shortage of natural crab seedlings, a large number of artificially propagated crab seedlings are currently used to breed in artificial breeding bases. With the large-scale artificial breeding, a series of breeding Problems such as: germplasm mixing. In particular, the characteristics and adaptability of crab species in the south and north are different. After being mixed, the growth and development will be poor. Due to the poor ecological environment of stocking crabs, such as the reduction of aquatic plants, the low reproduction of aquatic animals, the deterioration of PH value, and the dissolved oxygen cannot meet the normal development and growth needs of river crabs, res...

AI Technical Summary

Problems solved by technology

Due to the poor ecological environment of stocking crabs, such as the reduction of aquatic plants, the low reproduction of aquatic animals, the deterioration of PH value, and the dissolved oxygen cannot meet the normal development and growth needs of river crabs, resulting in the size of commercial crabs being too small, generally 75-100 grams per piece , the poor ecological environment for crab farming will also cause the disease to spread and escalate. In recent years, the shivering disease and silk algae attachment disease of crabs have become more serious

To sum up, if we don’t pay attention to the ecological technology of crab farming, it will bring great harm to the crab farming industry, and it will bring great economic losses to the crab farmers, which greatly restricts the development of the crab farming industry and the growth of the crab farming industry. economic benefits