The cultivation of kelp is the cultivation of kelp summer seedlings using natural light and artificial low temperatures under all artificially controlled conditions. Nursery conditions (1) Nursery room In a large glass house, there are many rectangular nursery ponds. The pool size is generally 10 meters long, 2 meters wide and 0.3 to 0.4 meters deep. There are two series and parallel arrangements. (2) Refrigeration system The low-temperature seawater used for the cultivation of seaweed summer seedlings is the principle that when liquid ammonia is used as gaseous ammonia, heat absorption is required to lower the seawater temperature. (3) Water supply system The seawater used for the cultivation of summer seedlings is natural seawater. After cooling and cooling, it is sent to the nursery room for use. The used seawater flows to the return pool for cooling and cooling. Seedling preparation process before picking Seedling preparation →Planting of nursery ponds and water preparation for nursery, preparation of plants with seedlings, selection and treatment of seedlings, selection of seedlings, determination of attachment density, seeding with seedlings, preparation of spore water, species of kelp Dry and irritation, the transport of species of kelp, the determination of the time of picking seedlings → cultivation and management of summer seedlings → water temperature control (5-10°C), light control, uniform processing, fertilization, water-change scrubbing, and clear pond → transfer and fertilization in summer seedlings In cultivation, the content of nitrogen and phosphorus in natural seawater can not meet the needs of seedling growth. Therefore, it must be supplemented by fertilization. The general use of fertilizer: nitrogen is 2-4PPm, phosphorus is 0.2 ~ 4PPm. Sodium nitrate is mostly used for nitrogen fertilizers, and potassium dihydrogen phosphate is generally used for phosphorus fertilizers.
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