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1 水质 育苗用水的好坏直接关系着育苗生产的成败,生产单位要具备一定规模的室外蓄水池,严格消毒后,在冬季气温较低时,选择好潮进水,最好一次性备足。在育苗生产前7～10d,用生石灰或硫酸铜等药物彻底消毒,并调至所需盐度备用。 2 亲蟹 2.1 亲蟹的数量 每年的10月下旬—11月可购买亲蟹。亲蟹的数量要根据育苗水体而定,一般每方水体1.5～2只(雌性),雌雄比例3:1。
A water quality nursery water quality is directly related to the success or failure of nursery production, production units have to have a certain size of the outdoor cistern, sterilized, in the winter when the temperature is low, select the tide of water, the best one-time ready . 7 ~ 10 days before seedling production, with quick lime or copper sulfate and other drugs thoroughly disinfected, and transferred to the desired salinity reserve. 2 crabs 2.1 The number of crabs each year in late October - November to buy crabs. The number of crabs according to nursery water body, generally 1.5 to 2 water bodies per side (female), male and female ratio of 3: 1.