Method for breeding seeds of river crabs
A breeding method and seedling technology, applied in the field of aquaculture, can solve the problems of small size of crab species, achieve the effects of changing natural growth characteristics, shortening seedling cultivation period, and improving economic benefits
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[0019] Example one
[0020] A method for breeding river crab seed, as a basic embodiment of the present invention, includes the following steps:
[0021] a) Construction of temperature-controlled cultivation ponds: in accordance with the needs of three-level intensive cultivation, construct first-, second- and third-level cultivation ponds of the same size. The water storage depth of the first-level cultivation pond must be more than 1.0 meters, and the second and third-level cultivation ponds The water storage depth of the cultivation pond is required to be more than 1.5 meters. A steel frame is used to build an arched greenhouse above the cultivation pond. The greenhouse of the primary cultivation pond is covered with double plastic film, and the greenhouses of the secondary and tertiary cultivation ponds are covered with a single layer of plastic film. The first-level and second-level cultivation tanks are equipped with heating and aeration pipes, and the third-level cultivation...
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[0027] Example two
[0028] It is a further embodiment. The difference from the first embodiment is that in step a), the ratio of the number of first, second and third-level cultivation tanks is 1:8:20.
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[0029] Example three
[0030] It is a further embodiment. The difference from the first embodiment is that the cultivation pond in step a) is required to be close to the water source, with sufficient water volume, fresh water quality and no pollution, complete inlet and drainage facilities, and the soil quality of the cultivation pond is clay loam, with a slope ratio of 1: About 2.5, the bottom of the pool is flat, the silt depth is about 15 cm, and the width of the pool ridge is 2.0 to 3.0 meters.
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