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Paying attention to the quality of pool construction pools is a great influence on the success of aquaculture. The ginseng pool is best to avoid dense areas where nourishing and ginseng are concentrated. Try to choose the closest area in the sea area, smooth flow, natural tidal water, no fresh water injection and other pollution sources nearby, better source water quality, and the best salinity range is 28‰. Between 33 miles. The basic food for barramundi feeding is rich in organisms, especially the number of benthic diatoms. The bottom of the pond is better with a harder sandy bottom and the water depth is more than 2 meters. Divide into the drainage channel, the bottom of the pool can not be lower than the low tide of shallow water, the drainage gate is built in the lowest position of the bottom of the pool, so that the bottom water can be drained.
After the pond is built, it is necessary to attach a reference reef. It is necessary to select suitable types of reefs according to local conditions and pile it up according to the standard. Usually, more stones are to be thrown and reefs are used. Generally, each rock block is no less than 2 meters and each stone is no less than 10 meters. Kilograms, throwing stone spacing of 4 meters to 5 meters, heap distance of 2 meters to 3 meters is good, the premise is conducive to the habitat of sea cucumber summer, is conducive to the algae, and for the normal growth of sea cucumbers provide a good space and bait . In addition, hollow bricks, cement pipes, tiles, used tires, scallop cages, waste mesh, ceramic tubes, and bamboo products can also be used as reference reefs.
Note that the disinfection of sea cucumbers in Qingtang is a benthic aquatic animal that inhabits the bottom of the water layer for many years. Therefore, the sediment environment and water quality of the ponds are important conditions for sea cucumbers to inhabit. The quality of the sediments has a great influence on the growth of sea cucumbers. . Too much silt in the pond will on the one hand corrupt the water quality, on the other hand it will breed bacteria, cause the occurrence of sea cucumber disease, affect the survival rate, and affect the sea cucumber's specifications and output. Therefore, before the seedlings are stocked, the sludge must be removed first. After the pond is dredged, the whole pond will be sprayed with 50 to 100 kg of lime per acre or 30 ppm of bleaching powder to be disinfected. After one week, the efficacy will disappear before the water can be fertilized and the seedlings can be cultivated. .
Appropriate fertilization of sea cucumber with benthic diatom and organic matter as bait, in order to ensure that the seedlings have sufficient food after stocking, improve the survival rate of stocking, reasonable fertilization before stocking; general Mushi composting organic fertilizer 50 kg to 100 kg or Inorganic fertilizer 3 kg to 4 kg.
Transplantation of large algae ponds should maximize the proliferation of kelp, wakame, seaweed and other large algae, or transplantation of algae, to provide a good habitat for sea cucumber habitat. There are three main methods for the proliferation of seaweeds: (1) Sporulating and throwing stones: The spores of kelp, seaweed, etc. are scattered and attached to the stones, and then put into the pond; 2 the method of growing vegetables: the mature seaweed leaves and skirts The spores of the vegetables are tied on a picking rope or in a mesh bag and put into a pond after being oversweet and stimulated. 3 Sinking rope proliferation method: The seaweed seedlings are placed on the seedlings or the spores are directly planted on the seedlings. Then sink the seedlings rope to the bottom of the pool.
Note that the season for stocking seedlings is usually spring or autumn. When stocking is mainly based on the water temperature, when the water temperature reaches 7°C～10°C in spring, it should be stocked in time to increase the survival rate. It is best to choose a sunny and warm weather for stocking; cloudy days can also be stocked, but rainy days should not be stocked, and large storms should not be stocked.
Pay attention to the quality of the seedling quality of the sea cucumber. The quality of the sea cucumber seedlings will affect the growth rate and survival rate. When stocking, the healthy seedlings with good constitution, no injuries and neat specifications should be selected. The healthy ginseng seedlings stretch naturally, crawling fast, and the body surface is black and shiny, and the spikes are sharp and high, and the excreted feces do not adhere. If the seedlings are dull and slimy, with bald and short flesh, slow movement, and faecal adhesions, it is a sign that the seedlings are not robust.
Note that the stocking density of stocking density affects the breeding effect and survival rate.
Many ginseng households regardless of the geography of the pond, the water quality, the amount of basic food organisms, one-sided pursuit of high-yield, high-margin, at any cost to increase the stocking density, the parameters of the ginseng is not ideal The seedling density in the pond reached tens of thousands of heads, and even as high as nearly 100,000 heads/mu. The sea cucumber's growth space became smaller, and as a result, the sea cucumbers could easily cause hypoxia, lack of food, and become sick until they died. Practice has proved that only a suitable stocking density can make full use of the pond water space, and will achieve better yields and benefits. In general, appropriate stocking densities should be determined based on pond conditions, technical levels, etc. In the general sea area, the reference pool allocation specification is 300 to 400 seedlings per kilogram, and the seedling density should be controlled at 4,000 heads/mu to 5,000 heads/mu, with large and small specifications and small size. In the sea area where the conditions are good and the natural bait is rich in organisms, and it is planned to feed feeds, the amount of seedlings can be increased appropriately.
Pay attention to the stocking method First, pay attention to disinfection. Before the seedlings were introduced into the pool, the medicinal bath was carried out with penicillin and streptomycin in a concentration of 30 mg/liter for 0.5 to 1.0 hour. In case of illness, enter the pool; secondly, pay attention to the temperature difference. When the seedlings are in the pond, the temperature in the container of the Shengshen seedlings and the temperature of the pond water should be basically kept. It is forbidden to stock directly without adjusting the temperature, and the temperature difference does not exceed 2°C. Furthermore, it is best to use the net bag placement method when it is put into use. The net bag method is to put the seedlings into net bags, and small stones are also installed in the bags to prevent the net bags from floating and moving. The divers put the seedlings on the reference reefs, and open the net bags so that the seedlings can climb out of their own way. Scattered. In this way, after climbing out of the seedlings, the seedlings are adsorbed on nearby stones or other substrates in order to avoid the impact of water flow, and they can also be beneficial to avoid predators. The survival rate of the seedlings is high, and the distribution at the bottom of the pond is relatively uniform. . It is not advisable to place the seedlings at the bottom of the pool between the reefs, and the amount of seedlings on each reference reef should be basically the same.
Pay attention to checking the stocking situation after checking the seedlings in a timely manner for 3 days, observing the activities of the seedlings, feeding, and defecation, etc., to determine whether the stocking is appropriate, and provide the basis for the next feeding and management.
Pay attention to timely refilling If found survival rate is low, should promptly replant seed. In addition, after a quarter of breeding season, after the captured parts have reached the listed specifications, they should be added in time to make full use of the pond space.
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Problems to be noticed in stocking of sea cucumber
In recent years, the benefits of breeding sea cucumbers have been considerable, and many people have actually been aquacultured. Due to hurriedness and poor technology, diseases have become more frequent, the survival rate has decreased, and the breeding effects have been uneven. Some have even lost money. The reasons for the failure of breeding are mainly due to the lack of technology and blind stocking. In fact, scientific restocking is the first step in achieving successful breeding. Now we will introduce the issues that should be paid attention to in the stocking of sea cucumber, for the reference of relevant persons.