Water quality is an important factor affecting the quality of marine treasures. The company adopts cofferdam method in the intertidal zone in front of the site.
In the sea area of Guohaizheng 082 100643 owned by the company, three large-scale multistage purification tanks with a total area have been built.
100 mu, with an average water depth of 2m. Each purification pond is equipped with a filter screen and two sand filter walls so that seawater can enter and be extracted.
The water pump has undergone three times of natural filtration and three times of natural precipitation before, and the three purification tanks alternately use purified seawater.
The effect far exceeds that of ordinary clean water pool. At the same time, there are three sets of valveless automatic recoil in the high position in the field.
A large-scale combined filter consisting of a sand filter, an artesian sand filter and a clear water tank is extracted from the clear water tank.
The primary purified seawater has been removed to the greatest extent by twice sand filtration and twice precipitation by a large combined filter.
All kinds of suspended particles are removed, reaching a sufficient cleanliness.
2. Hybrid breeding technology of shrimp and shellfish seedlings.
The Japanese scallop Patinopecten yessoensis was introduced to China from Japan in 1980. After more than 20 years of artificial breeding, it has appeared.
Germplasm degradation, slow growth, low survival rate and poor product quality. Our company introduced the original seed from Japan,
After a period of temporary rearing, the spawning period is synchronized with the local products, and then the domestic high-quality sea areas are selected to grow well.
The excellent population crosses to cultivate a new population with excellent characters, and its growth rate, survival rate and product quality.
The amount is significantly higher than other groups.
3. Hybridization breeding technology of bay shellfish fry.
Bay scallop was introduced to China from the United States in 1985. After more than 20 years of artificial breeding, there have also been obvious.
Germplasm degradation, slow growth, individual emaciation and low commodity value. To this end, the company from the United States and Canada.
Canada introduced the original species, crossed with the well-growing groups in China's high-quality sea areas, and cultivated excellent
The growth rate, survival rate and product quality of the new population are also significantly higher than those of other populations.
4. Purification technology of improved varieties of bay scallop.
Pure scallop fry were purified by breeding with excellent original seed imported from Canada.
Species, used to cultivate scallop seedlings, realized the localization of pure scallop.
5. Distant hybridization breeding technology of Stichopus japonicus seedlings. For many years, most nursery units mainly use pond-cultured ginseng as parents for breeding, and there are some problems.
Under the condition of the same degree of inbreeding and germplasm degradation, the company selected characters from different producing areas in Dalian and Shandong.
Excellent individual hybridization has achieved ideal results.
6. High-density bait culture technology
In order to meet the needs of large-scale industrial seedling raising, the company built a bait seed conservation workshop and prepared a bait camp.
With the salt-nourishing formula, the feed expands rapidly, and the content of single-cell algae per milliliter reaches 654.38+0000, which is the leading water in China.
Flat, ensuring the needs of seedling raising.
7. Large-scale intermediate culture technology of shellfish
Taking advantage of the excellent natural conditions in the temporary cultivation sea area, the company has upgraded the temporary cultivation facilities and the floating raft network.
Large-scale intermediate culture technology of shellfish has been implemented. This technology enables the company to temporarily raise scallop and bay shellfish seedlings every year.
At the end of April, the product specifications (4 ~ 6mm) were reached. At this time, the specifications of most peer companies were 1 ~
2mm, the company's seed market time is 20 ~ 30 days in advance, which is not only convenient for transportation, but also
High survival rate, fast growth, early harvest and high yield.