China News Service, August 4th. According to the website of the Ministry of Agriculture and Rural Affairs, recently, the Fisheries and Fisheries Administration of the Ministry of Agriculture and Rural Affairs issued the "Guidelines for the Production and Management of Sea Cucumber Pond Aquaculture". The guidelines stated that both after the completion of the new pond and before the seedling Need to clean the pond, the old pond is generally cleaned once every 2-3 years. Disinfection requires the use of quicklime, sodium hypochlorite solution (for aquatic products), chlorinated lime (for aquatic products) and other nationally approved veterinary drugs for aquaculture. According to the usage and dosage of the product instructions, add water to the whole pond and pour the water out after soaking for 7-10 days , And then introduce seawater to soak for 2-3 days, drain the water, and repeat the drainage 1-2 times. It is strictly forbidden to use dichlorvos and other pesticides, raw materials and other toxic and harmful substances for disinfection.
In addition, the guidelines clarify that according to the water quality of the breeding sea area, sea cucumber seeds can be put into sea water 10 days in advance before stocking sea cucumber seeds to facilitate the reproduction of benthic diatoms and other monocellular algae and provide sufficient basic bait for sea cucumber seeds. Apply compound fertilizer with a nitrogen to phosphorus ratio of 5:1-10:1 at the rate of 45-75 kg/ha for pond fertilization. It can be adjusted appropriately according to the water color to keep the transparency of the pool water at about 50cm, and the nitrate content in the water is less than 10mg/L. Do not use chemical or biological fertilizers that have not been registered by the state.