Ecological culture method capable of preventing picornvirus diseases

Abstract

The invention provides an ecological culture method capable of controlling picornvirus diseases in river crab culture. The ecological culture method comprises the following steps: I. pretreating a culture pond: adjusting the pH value of the sediment in the pond with quick lime, and exposing the bottom of the pond to the sun; II. determining the stocking variety and quantity in the river crab culture pond: stocking river crabs, intercropping freshwater shrimps and inter-culturing mandarin fish in the river crab culture pond; III. cultivating waterweeds in the river crab culture pond, including potamogeton crispus, potamogeton maackianus, ceratophyllum demersum, hydrilla verticillata, vallisneria natans, waterweeds, water chestnuts and nymphaea tetragona; IV. transplanting shellfish in the river crab culture pond, wherein the variety of the transplanted shellfish includes snails, clams, corbicula and other fresh and live shellfish; and V. using a biological agent in the river crab culture pond, wherein effective microorganisms (EM) mainly formed by bacilli, acetic acid bacteria, bifidobacterium, actinomycetes, photosynthetic bacteria, lactobacilli, saccharomycetes, and the like are mainly used. High-quality river crab culture ecological water areas can be provided by adopting the method, so that the river crab survival rate is high and high-quality and high-grade river crabs can be cultured. The method is capable of effectively preventing picornvirus diseases in river crab culture.

Description

technical field [0001] The invention relates to a method for preventing the shivering disease of river crabs, in particular to an ecological breeding method for preventing the shivering disease of river crabs. Background technique [0002] River crab, the scientific name is Chinese mitten crab. River crab cultivation has a history of 100 years. Due to the decreasing amount of natural crab seedlings, natural crab seedlings are far from meeting the needs of river crab breeding. At present, what adopt in a large number when cultivating river crabs in various places is artificially propagated crab seedlings. When the water environment in ponds for cultivating river crabs deteriorates, river crab shivering disease is very likely to occur. The main causes of river crab shivering disease are: (1), when the water quality transparency of the cultured river crab pond is lower than 10-20cm for a long time, when the photosynthesis in the water body of the cultured river crab pond is w...

AI Technical Summary

Problems solved by technology

The main causes of river crab shivering disease are: (1), when the water quality transparency of the cultured river crab pond is lower than 10-20cm for a long time, when the photosynthesis in the water body of the cultured river crab pond is weak, and when the water quality pH value of the cultured river crab pond is below 6.0, the water quality of the cultured river crab pond is lower than 6.0. When the beneficial microorganisms in the water body of the river crab pond are reduced, a small amount of river crab shivering disease is found and the treatment with antibiotics is ineffective. Epidemics and outbreaks

(2) When using chemical drugs to clear ponds (such as pentachlor powder) in the ponds for cultivating river crabs and the remaining drugs cause acute poisoning of river crabs, when long-term use of chemical drugs to prevent and control insect pests and diseases causes water pollution and chronic poisoning of river crabs, a small amount of river crabs are found When changing water and using biological antidotes for shivering disease can not effectively alleviate the river crab shivering disease, under the above circumstances, the microorganisms of the spiroplasma pathogen-Rickettsia are very easy to breed and cause large-scale epidemics and outbreaks of the river crab shivering disease