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Second, pre-release preparations
1. Artificial reef setting The shrimp pond bottom environment is an important condition for sea cucumber inhabitation. For shrimp ponds in the general bottoms, piles of stones, cement boards, and hollow bricks can be used as artificial reference reefs. Mu shrimp pond volume is 50 cubic meters to 80 cubic meters.
2. After the shrimp pond disinfection artificial reef is set up, the water is soaked in the shrimp pond for 15 days, and then the pool water is let off, and successive flushing and soaking methods are adopted to reduce the organic matter content of the sediment. 20 days before stocking, 50kg/mu ~ 75kg/mu quicklime was used to completely disinfect ponds to kill fish, pathogens and viruses.
3. About 10 days before planting, 60 mesh sieves were used to receive water, and the water level reached 50cm to 60cm. In the case of fertilizer, shrimp ponds are used to feed 50kg/mu~80kg/mu of fermented chicken manure, or 2kg/mu~4kg/mu of inorganic fertilizer to cultivate basic food organisms in the pool water.
Third, seed mix and stocking
In March, barracuda fry with a body size of 10 cm to 15 cm in length is stocked with a stocking density of 50 fish per mu; in March to April, large-sized seeds of natural sea cucumber of 50 pigs per kg up to 60 pigs per kg are stocked. On artificial reefs, stocking densities are generally 2,000 heads/Mu to 3,000 heads/Mu; in May, stocks of Chinese shrimps 1.2 cm to 3.0 cm in length that have been raised in plastic greenhouses are stocked at a stocking density of 2000 pigs per mu. Mu ~ 3000 tails/mu; if necessary, large-sized seaweeds, such as Dendrobium and Sargassum, may be transplanted at an appropriate time.
IV. Breeding management
1. Water quality regulation Water quality is the main living environment for aquaculture aquatic organisms. The quality of water quality directly affects the growth and survival of the cultured animals and their survival and death. The adjustment of water quality should be based on local conditions, and it should be adjusted according to the times. Before the breeding period (before June), the water level should not be too deep, generally 100cm ~ 120cm is appropriate, each tide should be changed according to the specific conditions of the pond in order to facilitate the proliferation of basic food organisms and the normal growth of cultured species; mid-culture ( After entering July), the water level should be gradually deepened, generally should be maintained at 1.5m ~ 1.8m or more, and increase the amount of water changes, keep the water fresh, to ensure that the sea cucumber; the late period of cultivation (about mid-September), can be appropriate Lower the water level. At this time, the summer sleep of sea cucumbers is complete, which is conducive to the activities and feeding of sea cucumbers.
2. Feed feeding During the entire breeding process, no special feeding is performed on sea cucumber. When feeding Chinese shrimp, appropriate amount of artificial feed for shrimp is fed, and a certain amount of crushed cake is fed in combination with the amount of cultured species in the shrimp pond. Small fish, shrimp, bran, sawdust, and algae make some bait and fish and shrimp dung to sink to the bottom of the pond for feeding by sea cucumber.
3. Daily management Regular water quality monitoring, control of physical and chemical indicators such as water temperature, salinity, dissolved oxygen, pH, control of good water color, and according to the transparency of the pool water timely fertilizer, to grasp the type and quantity of plankton in the pool water. Timely feeding of beneficial microorganisms such as photosynthetic bacteria into shrimp ponds will not only provide food organisms for sea cucumbers, but also improve bottom quality and purify water quality. At the same time, the patrol pool should be regularly monitored every day to observe the growth, feeding, defecation, disease, and survival rate of the cultured species. In summer, the temperature of pool water should be prevented from rising. After the heavy rain, it is necessary to pay attention to the timely discharge of fresh water from the surface of the shrimp pond, and increase the amount of water exchanged, so as to maintain the salinity of the pool water at 26 ‰ or more.
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Squid shrimp pond ecological breeding technology
In recent years, shrimp cultured sea cucumbers have rapidly emerged in China, and most of them adopt extensive management and extensive breeding methods. The sea cucumber and shrimp pond ecological culture model introduces sea cucumber, prawns, barracuda and seaweed into the same culture pond. It forms an ecological environment in which varieties are mutually utilized, mutually promoted, and ecologically complementary. Mixed cultures of prawns and barracudas can effectively improve the water use efficiency of the cultured sea cucumber apostichopus japonicus. The residual bait of shrimp fed with shrimps such as cakes, small junk fish and bran, and fish and shrimp manure can increase the pool water fertility. , to promote the growth of algae, but also for shrimp, stichopus to provide natural food organisms, while the barracuda can also be used to feed its organic detritus, zooplankton and swallow a lot of silt, sea cucumber and prawn manure Garbage and other garbage play a role in cleaning the aquaculture water body. The technical points of the ecological culture of sea cucumber in Shrimp are introduced as follows: 1. The selection of aquaculture pond The sea area in which the shrimp pond is located requires clean water and smooth flow. There is no large amount of fresh water injection and other pollution sources nearby. The food suitable for sea cucumber ingestion is abundant, especially The amount of benthic diatoms is sufficient, and the salinity of the water is kept at a level of 26 or more per year. It is best to include natural tides. The pool depth is 1.7m to 2.0m, and the general culture area is 10 to 50 acres.