Efficient and pollution-free river crab rice field breeding method

Abstract

The invention relates to an efficient and pollution-free river crab rice field breeding method. The method comprises the following steps of 1, selection and building of a rice field, wherein a rice field suitable for breeding is selected, ditching and bedding are conducted, an independent irrigation and drainage system is arranged, and river crab escape-prevention walls are arranged at the periphery of the rice field; 2, field cleaning and disinfection, wherein hidden objects are arranged, spiral shells are transplanted, and crab varieties are sifted and temporarily bred; 3, fertilization, wherein rice and aquatic plants are cultivated, and temporarily-bred crab varieties are put after rice seedlings turn green; 4, feeding management of river crabs, wherein a, in the breeding period of theriver crabs, different feeds are put in different breeding stages; b, the breeding water quality is regulated and controlled, and organic fertilizer is supplemented regularly; c, the diseases of therice and crabs are prevented and controlled, and harmful organisms are timely removed; 5, fishing and catching of the river crabs, wherein an attractant can be adopted for trapping and / or lamplight can be adopted at night for trapping. The method has the advantages that the use of pesticide and the breeding pollution can be reduced, and the method is high in yield, high in quality and free of pollution.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to an efficient and pollution-free rice field cultivation method for river crabs. Background technique [0002] River crabs belong to Crustacea, Decapoda, Fangcraidae, and Eriocheir. Its growth period is generally two years, and in artificial intensive cultivation, the time can be shortened. River crabs like the water environment with clean water quality and high transparency, where aquatic plants are overgrown and bait is abundant, so river crabs are most suitable for growth. [0003] In the process of cultivating river crabs, farmers often feed excessive bait in order to pursue breeding benefits, which not only causes waste of bait and increases costs, but also excreta and surplus bait produced in the process of cultivating river crabs accumulate in the water body , leading to a decrease in dissolved oxygen in the water body, which causes eutrophication in the wa...

AI Technical Summary

Problems solved by technology

[0003] In the process of cultivating river crabs, farmers often feed excessive bait in order to pursue breeding benefits, which not only causes waste of bait and increases costs, but also excreta and surplus bait produced in the process of cultivating river crabs accumulate in the water body , resulting in a drop in dissolved oxygen in the water body, causing eutrophication in the water body, and at the same time, it is easy to cause diseases of river crabs

In order to avoid the occurrence of diseases, farmers often need to change a lot of water and use medicines for disease prevention and treatment. A lot of water changes not only waste water resources, but also cause pollution of adjacent waters due to the discharge of aquaculture sewage, which is not conducive to the sustainable development of the ecological environment. Sustainable development; river crabs are more sensitive to the toxicity of pesticides than fish, so there are strict requirements on the dosage of drugs during the breeding process of river crabs, especially pesticides with strong toxicity. In addition, the use of drugs will also affect the ecology of the surrounding water body. environmental damage

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