Mud farming technology
2018-06-07 11:01:38
Bullacta exarata is a mollusk of gastropoda and hindpaw subclass. It is widely distributed in the tidal flats on the south and north coasts of China. Its meat is delicious and its nutrition is abundant. The farming techniques are introduced as follows.
1. Choose breeding grounds for bullacta exarata to be used in middle and lower tidal flats where the tide is small, the flow is smooth, the flow is slow, the terrain is flat, the coating is stable, the muddy quality is coated, and the surface mud is thicker. Muddy sandy mudflats are also suitable for farming.
2. Construct aquaculture farms to dig mud-filled embankments around mudflats and build earthen ponds. The width of the dyke is about 1.5 meters, the width of the top is 70-80 centimeters, the height is 70-80 centimeters, and the area of ​​the earthen pond is 300-700 square meters, so as to facilitate the breeding management. After the earthen ponds are completed, a ring-shaped pond ditch with a width of 30-50 cm and a depth of 20-30 cm is dug around the inner side of the pond. The cultured painted surface shall be shallowly turned, and soil shall be turned 20-30 centimeters, and the overturned grits shall be smashed, smashed and smashed to remove the predator organisms, and then the pusher plate shall be used to flatten and push the light to make the coated surface. Flat, muddy and smooth, built mud turtle breeding field. 1-2 days before sowing, clearing ponds with drugs. Clear water after the pond 1-2 times, washed away the residual liquid, and then impounding 20-30 cm, sowing seedling culture.
3. Seedling bags made of polyethylene monofilaments are woven into semi-artificial nursery sites or densely contaminated areas in natural sea areas. Gently scrape the mud screw seedlings and wash them with seawater to remove the impurities and sow them into cultured farms. The seedling season is suitable from the middle of February to the end of March. It is best to choose seedlings when cloudy or early dry tides occur, and do not sow seedlings on rainy days. Too much fresh water in rainy days is not conducive to the growth of mud snails. When sowing seedlings, the spiral seedlings are transported to the breeding grounds in the baskets and spread in the wind. The seedling density depends on the quality of the coating and the quality of the farming environment. Generally, 600-750 grams per 100 square meters are broadcast, and the seed size is 12,000. -14,000 grains/kg. If the coating quality is good, the seedling density can be appropriately increased.
4. During the aquaculture period, we will inspect the ponds on a daily basis to observe the growth of the snails, as well as the water color and water level in the ponds, and timely repair the dams. Timely change of water, the tide of the beginning of the first fresh water for a pond. When factors such as wind and waves cause too much muddy siltation in the pond, increase the number of water changes and use the opportunity to change the water and dry pond to the beach. Change the water at the same time, should be based on temperature changes timely adjustment of water level, low winter temperatures, water storage should be deeper (about 30 cm), the exchange of water should be combined with sun-coated, to promote the proliferation of benthic diatoms and other bait creatures. At low tides, benthic diatoms were cultivated by fertilization (1 ppm nitrogen and 0.1 ppm phosphorus) to promote the growth of snails.
5. The timely harvesting of snails grows faster and generally begins to be collected in May. At this time, the snails can reach 200-240 grains/kg. The catching method is generally manual picking.
1. Choose breeding grounds for bullacta exarata to be used in middle and lower tidal flats where the tide is small, the flow is smooth, the flow is slow, the terrain is flat, the coating is stable, the muddy quality is coated, and the surface mud is thicker. Muddy sandy mudflats are also suitable for farming.
2. Construct aquaculture farms to dig mud-filled embankments around mudflats and build earthen ponds. The width of the dyke is about 1.5 meters, the width of the top is 70-80 centimeters, the height is 70-80 centimeters, and the area of ​​the earthen pond is 300-700 square meters, so as to facilitate the breeding management. After the earthen ponds are completed, a ring-shaped pond ditch with a width of 30-50 cm and a depth of 20-30 cm is dug around the inner side of the pond. The cultured painted surface shall be shallowly turned, and soil shall be turned 20-30 centimeters, and the overturned grits shall be smashed, smashed and smashed to remove the predator organisms, and then the pusher plate shall be used to flatten and push the light to make the coated surface. Flat, muddy and smooth, built mud turtle breeding field. 1-2 days before sowing, clearing ponds with drugs. Clear water after the pond 1-2 times, washed away the residual liquid, and then impounding 20-30 cm, sowing seedling culture.
3. Seedling bags made of polyethylene monofilaments are woven into semi-artificial nursery sites or densely contaminated areas in natural sea areas. Gently scrape the mud screw seedlings and wash them with seawater to remove the impurities and sow them into cultured farms. The seedling season is suitable from the middle of February to the end of March. It is best to choose seedlings when cloudy or early dry tides occur, and do not sow seedlings on rainy days. Too much fresh water in rainy days is not conducive to the growth of mud snails. When sowing seedlings, the spiral seedlings are transported to the breeding grounds in the baskets and spread in the wind. The seedling density depends on the quality of the coating and the quality of the farming environment. Generally, 600-750 grams per 100 square meters are broadcast, and the seed size is 12,000. -14,000 grains/kg. If the coating quality is good, the seedling density can be appropriately increased.
4. During the aquaculture period, we will inspect the ponds on a daily basis to observe the growth of the snails, as well as the water color and water level in the ponds, and timely repair the dams. Timely change of water, the tide of the beginning of the first fresh water for a pond. When factors such as wind and waves cause too much muddy siltation in the pond, increase the number of water changes and use the opportunity to change the water and dry pond to the beach. Change the water at the same time, should be based on temperature changes timely adjustment of water level, low winter temperatures, water storage should be deeper (about 30 cm), the exchange of water should be combined with sun-coated, to promote the proliferation of benthic diatoms and other bait creatures. At low tides, benthic diatoms were cultivated by fertilization (1 ppm nitrogen and 0.1 ppm phosphorus) to promote the growth of snails.
5. The timely harvesting of snails grows faster and generally begins to be collected in May. At this time, the snails can reach 200-240 grains/kg. The catching method is generally manual picking.