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Gingival Seedling Technology
The facilities required for gingival rearing are similar to those for conventional fish seedlings, and the required facility conditions and water quality requirements are particularly important. The nursery's water supply system consists of pumps, pipes, storage tanks, and quick sand filters or sand filters. Due to the large amount of water used for nursery and aquaculture, many domestic manufacturers currently directly use the “day-valve filter tank†that is commonly used in tap water plants that have a large filtering function to automatically recoil, and filter and culture water. The shape of the gingiva nursery pond is the best. When the definitive is the round cement pond with a volume of 20-60m3 and a depth of about 1m, it has the advantages of circulating water, easy management and large amount of seedlings. However, in practice, based on considerations such as construction costs, people often build pools into square, octagonal, or elliptical pools with a small footprint. In addition, in order to reduce investment, make full use of the existing facilities, such as the true oysters and other swimming fish or shrimp breeding ponds and other slightly modified can also be used for gingival seed production. In general, the existing fish and shrimp breeding ponds are relatively deep, more than 1.5m, which is not conducive to the direct cultivation of the juvenile juveniles, but can be solved by the method of hanging cages in the pool.