The invention relates to a water changing method for culturing
auricularia of
stichopus japonicus, and belongs to the technical field of artificial culturing and water changing methods of
stichopus japonicus. The method comprises the following steps of 1), water changing in the earlier stage, wherein in the earlier stage, water is only added but not drained, specifically, water which accounts for1 / 3-1 / 2 of the volume of a culture pond 1 is added into the culture pond 1 on the day when the
auricularia is put into the pond, and afterwards, water which accounts for 1 / 10 of the volume of the culture pond 1 is added into the culture pond 1 every day until the culture pond 1 is filled up; 2), water changing in the later stage, wherein after the culture pond 1 is filled up, water needs to be changed every day, before water changing, the
auricularia needs to sufficiently float upwards at first, after the auricularia sufficiently floats upwards,
bottom water with poor
water quality is drainedfrom the bottom of the pond, meanwhile, residual feeds,
feces, dead and inferior auricularia and other sundries settled at the bottom of the pond are discharged out of the pond, when the discharged water accounts for 1 / 5-1 / 3 of the volume of the culture pond or the upward-floating auricularia has the sign of diffusing, water draining is stopped, the culture pond is filled with new water until theculture pond is filled up, when 5-10% of the auricularia in the culture pond is metamorphosed into doliolarias, a substratum is put, and then water changing in the later stage is finished. The water changing method has the advantages that the water changing effect is good, the water changing efficiency is high, the labor intensity is lowered, the auricularia is prevented from being injured, crossinfection of diseases is prevented, run-off of the auricularia is reduced, and the culturing cost is lowered.