First, choose the right breeding sea area cultivation of seaweed ideal sea area should be the tidal area under the mid-bias, in the tidal period at low tide when the trusses have 3 hours to 5 hours of dry dew time, choose to have the rush of tides and large waves In the fishery area, the surface of cultured laver shall be dominated by sandy soil, and no silt should accumulate. The beach surface is flat and stable. It is not close to the harbor and there is no excessive fresh water and sewage discharged. The specific gravity of seawater is between 1.0015 and 1.025. should.
Second, the establishment of a solid economic breeding truss Laver farming truss consists of two parts of the net curtain and the floating chinensis, the former is the substrate with the seedling growth of the porphyra, the latter is a shelf hanging net curtain. The truss should be set according to the conditions of the tidal flat, the size of the storm, and the speed of the tide.
The raw materials of the net curtain should be made of water-repellent and corrosion-resistant materials, and most of them should be made of vinylon as the substrate of the laver seedlings. The specification of the net curtain is preferably 2 meters and 2.5 meters. The cable is composed of 72 to 90 vinylon yarns, and its diameter is 3mm to 4mm. The mesh size is preferably 20cm to 24cm in diameter. If the mesh is too small, the algae can easily cover the net curtain when it grows. If the net is too large, it is not conducive to increase the output.
The truss is composed of three parts, floating platform, bed frame and pile. The pontoon is used to hold up the bed frame and tie the net curtain. Its length is 110 to 120 meters, and the net hangs 24 to 26 pieces. After the central network screen of the floater is hung, there must be a certain length of vacancy at both ends. Its length is determined according to the level of the tidal level in the local sea area. The ratio of the height to the highest area is generally about 1:6 to ensure the truss during the tidal period. All float on the water. The thickness of the pontoon should be determined by the speed of the water flow, the size of the wind wave, and the load of the algae. The diameter is generally 16 mm to 18 mm. The bed frame is composed of bamboo and tree sticks. 2.4 m bamboos are used, and 50 cm long sticks are used as brackets at both ends. The bed frame can be tied to the net curtain and play a role in buoyancy. Raise the trusses with brackets so that net curtains are not dragged and piling to fix floating steel.
Third, collect shell spores
1. Check the maturity of the filaments. Observe under the microscope the filamentous system. The proportion of double cells should account for more than 10% of the large cells. The shells that fostered the spores were buckled in a white magnetic bowl, and a suitable amount of seawater was used as a diffusion test. The amount of spores per seashell shell was more than 100,000. Visual observation showed that the crust of the shell filiforms was pale yellow. Shell spores that meet the above requirements are signs of maturation of the filaments and can be used to harvest seedlings.
2. Dispose of vinylon mesh curtains, which are commonly used with matte-substrate-mesh screens, and contain chemical components that inhibit the attachment of conchospores. They should be thoroughly soaked and washed before use, otherwise they will affect attached seedlings. The used old net curtains should be accumulated in the pits to maintain a certain humidity for 2 months to 3 months, so that the original old algae and roots and other algae will be rotted, and then washed and dried for reuse.
3. Grasp the appropriate time and water temperature for collecting spores, such as collecting seedlings too early and high water temperature, will not only affect the emergence rate after the sea and promote the massive adhesion of green algae, but also a pathogenic factor; Late, the water temperature is low, and the seedlings grow slowly, which will significantly reduce the yield. On the southern coast of Jiangsu Province, the appropriate time for picking seedlings is from late September to mid-October. The water temperature is between 16°C and 22°C. From the production practice, the growth rate of seaweed seedlings after the sea is closely related to the time of picking seedlings. The seedlings of the lower sea before the beginning of October can be harvested for 60 days, and the seedlings of the lower seas from the beginning of October to the middle of the month are about 70 days to 80 days. Harvesting, the seedlings of the lower sea in mid-October or later will take about 90 days to harvest.
After the conchospores are attached to the net curtain, they must be observed in time, and then they can go to the sea after germination, and hang the net curtain in the sea two hours before the high tide, which will help improve the survival rate.
Second, the establishment of a solid economic breeding truss Laver farming truss consists of two parts of the net curtain and the floating chinensis, the former is the substrate with the seedling growth of the porphyra, the latter is a shelf hanging net curtain. The truss should be set according to the conditions of the tidal flat, the size of the storm, and the speed of the tide.
The raw materials of the net curtain should be made of water-repellent and corrosion-resistant materials, and most of them should be made of vinylon as the substrate of the laver seedlings. The specification of the net curtain is preferably 2 meters and 2.5 meters. The cable is composed of 72 to 90 vinylon yarns, and its diameter is 3mm to 4mm. The mesh size is preferably 20cm to 24cm in diameter. If the mesh is too small, the algae can easily cover the net curtain when it grows. If the net is too large, it is not conducive to increase the output.
The truss is composed of three parts, floating platform, bed frame and pile. The pontoon is used to hold up the bed frame and tie the net curtain. Its length is 110 to 120 meters, and the net hangs 24 to 26 pieces. After the central network screen of the floater is hung, there must be a certain length of vacancy at both ends. Its length is determined according to the level of the tidal level in the local sea area. The ratio of the height to the highest area is generally about 1:6 to ensure the truss during the tidal period. All float on the water. The thickness of the pontoon should be determined by the speed of the water flow, the size of the wind wave, and the load of the algae. The diameter is generally 16 mm to 18 mm. The bed frame is composed of bamboo and tree sticks. 2.4 m bamboos are used, and 50 cm long sticks are used as brackets at both ends. The bed frame can be tied to the net curtain and play a role in buoyancy. Raise the trusses with brackets so that net curtains are not dragged and piling to fix floating steel.
Third, collect shell spores
1. Check the maturity of the filaments. Observe under the microscope the filamentous system. The proportion of double cells should account for more than 10% of the large cells. The shells that fostered the spores were buckled in a white magnetic bowl, and a suitable amount of seawater was used as a diffusion test. The amount of spores per seashell shell was more than 100,000. Visual observation showed that the crust of the shell filiforms was pale yellow. Shell spores that meet the above requirements are signs of maturation of the filaments and can be used to harvest seedlings.
2. Dispose of vinylon mesh curtains, which are commonly used with matte-substrate-mesh screens, and contain chemical components that inhibit the attachment of conchospores. They should be thoroughly soaked and washed before use, otherwise they will affect attached seedlings. The used old net curtains should be accumulated in the pits to maintain a certain humidity for 2 months to 3 months, so that the original old algae and roots and other algae will be rotted, and then washed and dried for reuse.
3. Grasp the appropriate time and water temperature for collecting spores, such as collecting seedlings too early and high water temperature, will not only affect the emergence rate after the sea and promote the massive adhesion of green algae, but also a pathogenic factor; Late, the water temperature is low, and the seedlings grow slowly, which will significantly reduce the yield. On the southern coast of Jiangsu Province, the appropriate time for picking seedlings is from late September to mid-October. The water temperature is between 16°C and 22°C. From the production practice, the growth rate of seaweed seedlings after the sea is closely related to the time of picking seedlings. The seedlings of the lower sea before the beginning of October can be harvested for 60 days, and the seedlings of the lower seas from the beginning of October to the middle of the month are about 70 days to 80 days. Harvesting, the seedlings of the lower sea in mid-October or later will take about 90 days to harvest.
After the conchospores are attached to the net curtain, they must be observed in time, and then they can go to the sea after germination, and hang the net curtain in the sea two hours before the high tide, which will help improve the survival rate.