Tegillarca granosalinnaeus, also known as grain larvae, blood worms, and nymphs, belongs to the genus Valerianidae, Acrididae, and Polygonaceae. It is a kind of marine shellfish with high economic value in China's coast. After several years of research, we have concluded a set of practical, high-yield, high-yield technologies for muddy nets. Now we introduce them as follows:
First, the choice of net enclosures
1? Choose calm sea, smooth flow, slightly fresh water injection, low tide, no more than 4-6 hours of drying time in the middle and low tide area, the flat beach, when the tide is stable when the beach surface, there will be no flow phenomenon.
2? The bottom of the mud is muddy 70% - 80% mud, sand 20% -30%, no consolidation of the mudflat, about 5cm of silt, fertile bottom. Because of the rich growth of benthic algae and other loaches in this sediment, the organic matter is more conducive to feeding and growth.
3? The water quality is pollution-free. There are no pesticide plants or chemical plants nearby. The salinity of the waters is between 16.4 ‰ and 32 , and the pH is 8.
Second, breeding methods and facilities
1? Set fences: The role of the nets is mainly to determine the culture area, to facilitate the management, followed by the demarcation of the boundaries of a variety of muddy venues.
Perimeter net mesh mesh 3cm polyethylene mesh, the net height to maintain 50cm, struts available diameter 5-10cm wood, bamboo rods, cement piles can also be used. The net area is generally 500-1000 mu.
The internal perimeter grid can be used 2cm polyethylene mesh, net height 20-30cm, partition area is generally 10-50 acres.
2? Breeding method: The loach from the acquisition or long-distance transportation should be separated according to the large, medium and small specifications. The large size is generally more than 400 grains/kg, the medium size is about 2000 grains/kg, and the small size is 5000 grains/kg. Then broadcast according to different specifications in the site with the internal fence. Large acres of 80-100kg, 40-50kg of medium grain and 40kg of small grain.
Third, seed stocking
1? Placement: Check the beach and put on a trimming and turning over before laying the seedlings. The high beach that affects the tide at the time of ebb tide should be leveled and filled at the bottom so as to prevent the phenomenon of flow groove.
2? Remove predators: Prior to the release of the seedlings, the predators hidden in the culture area should be removed.
3? Seed enter play: Beginning in April. Seeds are generally collected as wild seedlings, and they can also be purchased as seedlings. The acquisition of wild seed collected during harvesting should be handled in time, especially in July, August and September to prevent the survival rate from affecting. To recover the seed that needs long-distance transportation from the field, the air temperature and time should be known during transportation. Generally used nylon bags, 15kg per bag, bags stacked no more than 3 layers. The transport time must not exceed 48 hours. Cover with straw bags soaked in sea water to avoid sun exposure and air drying.
Fourth, develop management
The material conditions and technical measures for the breeding of muddy nets and enclosures are all finally achieved through cultivation management, and the management of cultivation is very important.
1 ? Organize beach protection to prevent theft. A guard boat is provided for every 1,000 mu of mudflat with 2-4 guards per boat.
2?Exploration nets, piles, and piles have been found to be downright and righting. Timely clearance of fouling organisms such as algae and sea squirt attached to the fence.
3. To understand the status of the beach surface, if there are signs of trough found in time to take mud bags to fight dams, fill the mud in the low area and other measures to prevent it from happening, so as to avoid the flow tank to wash away the mud.
4? Remove predators, and promptly clear the predators and other predators in the beach.
5. According to the growth of the mud, timely disperse the dense muddy mud, or fill in the muddy mud.
6. Regularly determine the growth and density of loach. It is also necessary to understand the breeding condition of loach during the breeding period of loach in July and August.
7. Strengthen water quality monitoring.
Fifth, the harvest
After 3 years of growth, the loach generally reaches the market size of 160 grains/kg. From January to April of the next year, especially around the Spring Festival, it was a season of catching and harvesting. At this time, the loach is the most plump, the blood is more delicious, and the temperature is low, it can be stored for a long time.
Muddy harvesting methods: After the ebb tide, concentrate with rakes, scrape into rake bags, wash away impurities. You can also use your fingers to dig out the “gas eyes†that are formed in the mud in the mud when entering the mud. Muddy burrowing depth is generally about 1cm. Loach generally yields up to 200-250kg per mu.
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