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What should we pay attention to when cultivating Porphyra haitanensis? What are the breeding grounds?
First, aquaculture areas. All the nutrients needed for Porphyra haitanensis growth are brought by seawater movement. Therefore, the open and semi-open Shadi Bay with gentle tidal current is the best in the aquaculture area, the suitable flow velocity is 15 ~ 30cm/s, the tidal level is more than 4m from the middle tide to the dry tide, the nitrogen content of seawater is 100 ~ 200mg/m3, and no industrial waste is discharged into the aquaculture area.

Second, the raft frame device. 1 raft frame is adopted, which generally consists of 14 bamboo cuttings, 2 1 pontoon bridge, 42 hanging ropes, 20 curtains, 2 pontoons and 4 piles. First, the pontoons are fixed on the pontoon bridge on the shore, and the pontoons are arranged in parallel with a spacing of 4.8m Then they are transported to the predetermined sea area, tightened by cables and fixed on the front and rear four piles. Then, seven cutting poles are respectively arranged on both sides of the pontoon bridge, and hanging ropes are tied on the upper parts of the poles at equal intervals. Each pair of columns supports three buoys, and there is a curtain between them.

Third, pick seedlings. Choose an area in the middle tidal zone where dry tide can keep manna for 3-4 hours. It is best to pick seedlings before spring tide and autumnal equinox after the Millennium to avoid the adverse effects of high temperature (above 27℃) on the attachment and germination of conchospores.

1. Seedling collecting density adopts the method of spraying spores on the sea surface, and 10 curtains are stacked together to collect seedlings. According to the calculation of 2 1 net curtain (5m× 4.8m), the number of crustaceans collected for 1 row and 1 row is generally 500 million to 700 million. Cloth dyeing can reduce 1/3.

2. Seedling picking method: in the evening, the "shell seedlings" are transported to the rapids, hung on the ship's side, and merged into the water for 0.5 meters for running water stimulation; Pull the boat before 6 o'clock the next morning and fill it with fresh and clean seawater to make shellfish spore water; At noon, splash it evenly on the net curtain at 1 1 ~ 13 (that is, before and after the beach). If it is sprinkled at 1 1, add fresh seawater and pour it again at 1 after 12.

Fourth, management.

1. The seedlings can be seen 7 ~ 10 days after the seedlings are picked, and the curtain partition can be carried out after the seedlings are seen.

2. Daily management ① Check the safety of the curtain frame and repair it in time if it is damaged. (2) Adjust the dew time of the net curtain and dry it in time. After harvesting, the conchospores are put into the sea. On the one hand, the seedlings are small and the density is low. On the other hand, the net curtain is submerged for a long time, which is easy to plant diatoms and Enteromorpha, which affects the emergence and growth of laver. Therefore, the curtain drying method should be adopted to remove them. In addition, drying or drying curtains in time can effectively control the occurrence of laver diseases.