River crab ecological cultivation method

Abstract

The invention relates to nuisance free large-size river crab ecological breeding method. The method comprises: exposing breeding pool in sun after drainage, fertilizing the pool, planting aquatic grass, migrating seashell for mixed breeding, determining breeding density according to a certain quality and quantity proportion, choosing uniform size ,vigorous individual, regulating and controlling the water quality, insuring oxygen content and the slight alkalinity of water pH. The pool has optimal breeding density, crabs are not influenced by disease, and antibiotics is not needed.

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