Open-air temporary rearing method of procambarus clarkii in winter

Abstract

The invention provides an open-air temporary rearing method of procambarus clarkii in winter. The method comprises the steps that selection of an overwintering planting and breeding paddy field and field engineering transformation are carried out; open nylon net cages are used for breeding the procambarus clarkii, the net cages are arranged on the table surface of the paddy field side by side, theline spacing is 8-12 meters, the interval is 4-7 meters, and the distance of the outermost row of the net cages from the inner edge of an annular ditch is 5 meters or above; the water quality is regulated; elodea nuttallii is planted, the line spacing is 8-12 meters, and the plant spacing is 4-6 meters; red shell shrimps are selected and put in the net cages; in the rearing period, the water level is maintained at 1.2-1.5 meters above the table surface; feeding management of temporary rearing of the procambarus clarkii is carried out; a special procambarus clarkii feed is selected for feeding. The open-air temporary rearing method of the procambarus clarkii in winter has the advantages that by changing the overwintering environment of the procambarus clarkii, measures of deep water injection, the high net cages, thick water plants and fertilizer and water for cultivation are taken, a better overwintering environment is created for the procambarus clarkii, the stress stimulation of theenvironment temperature change on the procambarus clarkii is retarded, finally, the overwintering survival rate of the procambarus clarkii reaches 90% or above, and the overwintering weight is reduced to less than 5%.

Description

technical field [0001] The invention relates to the technical field of crayfish culture, in particular to a method for raising crayfish in the open air in winter. Background technique [0002] Crayfish, scientific name Procambarus clarkii, belongs to crustaceans, is a kind of temperature-changing animals, and is more sensitive to the temperature of water body. Long-term low temperature has a certain impact on the feeding, metabolism and growth of crayfish. In winter, crayfish basically hide in caves or deep water aquatic plants, in a state of hibernation. Studies have shown that when the water temperature drops below 5°C, the basal metabolism of crayfish will drop significantly, they will stop feeding completely, and rely on the energy storage before overwintering to maintain basic life activities. If the energy storage is insufficient, they will face the threat of death; another factor affecting the safe overwintering of crustaceans An important factor is the external livi...

AI Technical Summary

Problems solved by technology

The existing technology still stays in the optimum temperature period for the cultivation of crayfish. For the cultivation of crayfish, there is still the problem of difficulty in overwintering, and the production of crayfish in winter is difficult to meet the market demand.

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