Raft culture
Seafood and equipment selection: scallop culture should choose the sea water is not polluted, bait-rich sea area, the flow of water should be smooth. Flow rate of 0.4-0.6 seconds is the best; water depth of 10-25 meters is appropriate, the substrate to gravel and sandy mud bottom is good; water temperature should be between 1-23 degrees all year round, the highest water temperature in summer does not exceed 25 degrees, winter is not less than minus 1 degrees; culture cage should choose the cage diameter of 36 centimeters, the mesh of 3 centimeters or 6 centimeters specification mesh cage. The cage should be 36 centimeters in diameter, with a mesh of 3 centimeters or 6 centimeters.
Time selection of seeding: timely seeding is the key to shorten the shrimp scallop culture cycle, generally shrimp scallop pre-sprouting began in mid-April to the end of the month, the mid-sprouting time in late October to early November to complete between. You should avoid moving the net cage above 20 degrees, so that the scallops will not be stimulated by high temperature, resulting in a large number of deaths.
Splitting specifications and density: scallop raft culture production to have a reasonable distribution of groups, generally placed on the specification of 3-4 cm of seedling, the first layer of shellfish seedling 25-30 per layer, with the growing shellfish seedling, the middle of each layer of seedling 14-16 per layer, the late layer of each layer of 5-7 is appropriate.
Split seedling raising should pay attention to the problem: shrimp scallop culture size seedlings should be raised separately, which is conducive to the growth of shrimp scallop, while laying the foundation for the future harvest; in the process of splitting the seedling, the action should be fast, dry dew time should be short, generally not more than 30 minutes; split the seedling place should not be in the open seashore, to be arranged indoors or in a shed in order to prevent the wind and the sun. If you can be on the boat directly sub-seedling is more ideal, so that the seedling after the sea is not only recovered quickly, and the survival rate is also high.
Shellfish, algae and aquaculture: shellfish, algae and aquaculture is a better form of farming, this type of farming is not only able to make full use of the water body, but also to maintain the ecological balance of the sea area, so that the two are mutually beneficial and complementary. Shellfish and algae farming is generally divided into zone farming and rope farming. In the shrimp scallop culture is more intensive in the sea area adapted to take the zone culture, that is, two areas of culture shrimp scallop, an area of culture kelp, or in the same area 65% of the rafts stocked shrimp scallop, 35% of the rafts stocked with kelp. According to the different conditions of the sea area, can also be in other proportions of inter-farming.
In the tidal current is relatively small in the sea area can be used between the rope, that is, in the kelp culture rafts every 2-3 ropes of kelp between the raising of a cage of scallops, both practices can be achieved with scallops and kelp double harvest purpose.
Sea management: timely removal of debris on the cage to prevent mussels, algae attached. During the period of cultivation, the cage should be changed at the right time, generally a cycle of culture to change the cage upside down 3 times, the first time in the first half of October in the month of seedling cultivation, the second time in the following year in April in the middle, late, the third time in the following year in the first half of October. At the same time, with the growth of shrimp scallops, it is necessary to increase the buoyancy in a timely manner, to prevent the sinking of the shelf, so as not to cause the death of shrimp scallops. Under normal circumstances, after two years of growth, shrimp scallops can be harvested, the income per mu can reach more than 50,000 yuan, the economic benefits are very significant.
Bottom play flow augmentation
Scallop bottom play flow augmentation is a new development in recent years, the development of fast, effective and obvious a way of breeding, small investment, easy to manage, with the advantages of large-scale aquaculture development, especially suitable for the island's unique sea conditions, the development potential is very huge. Shrimp scallop bottom sowing to get good returns, first of all, we must choose a good specification of seedlings, general bottom sowing specifications should be more than 3.5 centimeters, so as to ensure the survival rate, if the seedling specification is less than 2 centimeters, bottom sowing survival rate is very low. Bottom sowing time in the spring and fall of the year can be, from late April to the end of May before the end of the spring bottom sowing the best results; from late October to mid-November in the fall bottom sowing followed.
The density of bottom sowing is generally required to be about 25 grains per square meter, the density is too large, the growth rate is slow, the density is too small, not conducive to the formation of population advantage. Bottom sowing sea area generally choose smooth water, erbium material rich, the bottom to sandy mud bottom, water depth of 10-25 meters for the best. Through recent years of research and observation found that the scallop is not very strict environmental requirements, water depth of 6-40 meters and different bottom quality of the sea area can be bottom-seeded.
Shrimp scallop bottom sowing method is best by divers to underwater sowing, can also be directly on the boat sowing. Shrimp scallop bottom sowing should be by divers before the bottom sowing of the sea area of the enemy organisms clean, bottom sowing in general can not be randomly enter the breeding area, bottom sowing of the breeding area should be resolutely put an end to the trawl and angling production, so as to ensure that the shrimp scallop is free from hostile infestation, so that it is normal and rapid growth. Release of bottom-seeded scallops, if properly managed, through the growth of 2-3 years or so, the return rate of up to 35% or more. Scallop farming is an emerging advantage of aquaculture projects, as long as the planning is reasonable, breeding science, proper management, will achieve good economic benefits.