Method for breeding crayfish

Abstract

The invention provides a method for breeding crayfish, and belongs to the field of aquaculture. The method includes pretreatment of an aquaculture pond, cultivation of algae, seedling and management,fodder feeding and purification of water body; wherein a purifying agent used for purifying the water body comprises an EM biological bacterium agent and a composite flocculating agent; the compositeflocculating agent is a polymer formed by using beta-cyclodextrin as a matrix to carry out a cross-linking reaction with a crosslinking agent; the crosslinking agent comprises citric acid, hydroxybenzoic acid and 2-hydroxypropionic acid. The method for breeding the crayfish provided by the invention has the advantages of good breeding ecological environment, low breeding cost, good water purification, high crayfish survival rate and high yield; the edibility and palatability of the fodder used in the method is excellent, and the preparation yield and the product purity are high; and the used composite flocculating agent has a large specific surface area, high cavity structure capacity and adsorption capacity, low expansion coefficient, wide water area, excellent water purification effect,can improve the breeding environment, can improve the survival rate, and can increase the economic benefits of aquaculture.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for cultivating crayfish. Background technique [0002] Crayfish, whose scientific name is Procambarus clarkii, belongs to the phylum Arthrozoa, the class Crustacea, and the genus Procambarus. Its meat is delicious and nutritious, and it is deeply loved by people. It is the main species of shrimp breeding at present. Crayfish is an alien species, native to the southern United States and northern Mexico. It was introduced from Japan to Nanjing, China in the 1930s. [0003] Later, due to natural transmission and artificial breeding, it gradually expanded to all parts of the country, and its main production areas are the middle and lower reaches of the Yangtze River such as Hubei, Jiangsu, and Anhui. Crayfish has now become a species in China's natural water bodies, and in some areas it has even formed a dominant population. Crayfish has a wide range of adaptabilit...

AI Technical Summary

Problems solved by technology

my country's water bodies are seriously polluted by heavy metals. The heavy metals zinc, lead, cadmium and mercury in some water body sediments exceed the standard by more than 150 times, and crayfish themselves have a strong ability to enrich heavy metals, resulting in a large number of bacteria in the cultured crayfish , parasites, antibiotics, hormones and heavy metals, which do not meet the healthy eating standards, and the meat quality and taste of crayfish are greatly affected. If the water environment of crayfish breeding is strictly controlled, on the one hand, it will cost a lot, and on the other hand, it will prolong the life of the crayfish. Crayfish growth cycle, increased mortality, resulting in slower accumulation of crayfish meat