Qinglan lives in the sediment or sand-muddy intertidal zone in the offshore areas, and is buried in habitats. Commonly known as black earthworms and shovels, it is a seafood product with increasing demand on the market. Therefore, it has broad prospects for breeding and breeding. In order to protect and purify the marine environment, develop ecological breeding, and restore the natural resources of green barley, the Jinzhou Marine Environmental Monitoring and Forecasting Center Station and the Linghai Marine and Fisheries Bureau have separately collected and sampled sediment from the adjacent sea areas in the area of ​​culturing and breeding in Linghai City. The seawater test analysis was conducted to investigate the relationship between the distribution, ecological habits, growth and reproduction, and the ecological environment of the indigo, and successfully introduced the seedlings of the indigo from Shandong Province. After 16 months of the end-to-end seeding experiment, the expected effective proliferation was achieved. purpose.
First, the site selection test site selection is far away from the mouth of the Daling River, near the Jinzhou Saltworks high-household halogen zone, a shallow beach, covering an area of ​​1,000 acres. According to the results of water quality sampling survey and eco-environmental analysis, the high-house brine-producing area near-shore water quality conditions are within the national second-class water quality standards. The water quality is fresh and there is no industrial pollution; the water flow is unobstructed, and it is not susceptible to wind and waves, and the flow rate is moderate (average The flow rate is less than 0.20m/s), it is not easy to make the larvae of the green maggots lost; the turbidity is less than the tidal zone, which will not cause suffocation of the green larvae; the basal silt is suitable for the attachment of the larvae of the green barrows and the larvae of the pups; benthic diatoms Rich, it is conducive to the feeding and growth of young plants. Surveys have shown that the distribution of the major enemy organisms (such as goby, squid, swimming crab, flat jade snail, starfish, and forelimbs) is also significantly less than that in the tidal zone. In short, the water environment of the test site is relatively stable, and it is more suitable for the propagation of barley seedlings.
Second, seed selection and transportation inspection seed production and seed quality can guarantee that the day of arrest, the day of transport is a prerequisite to understand the seed production of water temperature, salinity, seed density (intermediate seedlings) can avoid the introduction and proliferation The water environment difference in the district is too large. We should choose the healthy barley seed with uniform particles, no damage, no wrong shell and no parasite, and fully prepare the transportation equipment and measures. Before transporting the young larvae (bags), they must ensure that their seedlings are pure, remove the dead medaka seedlings, and smash the seedlings of the larvae, and must not possess predator organisms. For long-distance transportation over 8 hours, cooling and ventilation facilities must be provided, and the transportation survival rate can reach over 90%.
Third, broadcast time and methods
1. Spreading time In June and August 2004, two batches were sowed in the field; in June 2005, the third batch of locally grown green barley seed was sowed.
2. Spreading method The submerged zone is broadcasted at the bottom of the tide, that is, when the tide is high, the green barley seed is sown uniformly on the beach of the test site, allowing it to dive into the ground slowly.
Fourth, seed sources and dissemination density Barley seedlings were taken from natural seedlings and intermediate breeds in Binzhou, Shandong Province. The first group of 36 ton barley seedlings had an average size of 700 grains/kg to 800 grains/kg, a seedling density of 36 kg/mu (approximately 25,000 grains/acre to 28,000 grains/acre), and the second batch of 15 ton barley seedlings. , The average size of 300 grains / kg 400 grains / kg, seedling density 15kg / acre (about 4500 / acre - 6000 grains / acre), the third batch of barley seedlings 3t, from the middle of the cultivation of green barley seedlings The average specifications for the shell length 1.5cm ~ 2cm, sowing area of ​​20 acres, the average seedling density 150kg/mu.
V. Management measures
1. The way of culturing and cultivating focuses on the sustainable development and the long-term care of healthy farming, and the way of cultivating on the beach. That is to say, the aquaculture area is one-half of the scope of the right to ensure the rights. The rest of the area is in the state of natural resources management. After two to three years, it will be moved to a blank beach for renewal, in order to facilitate the full decomposition of organic matter and harmful substances accumulated in the culture beach. Ecological deterioration caused by circulating culture.
2. The management method clearly defined the scope of the inbreeding area and equipped with a 60-horsepower fishing boat to be responsible for the daily management, implement fixed-position and position-based care, and prevent theft and indiscriminate mining.
3. Regularly check once every 10 days to 15 days to test the growth status, water quality, and disease death status of the barley. The water temperature was measured at regular intervals from 8 am to 15 pm and records were filed.
4. The regular removal of predator creatures, the specific method is to catch under the crab nets.
Six, proliferation results
1. Proliferation Effect From June 2004 to October 2005, the number of seedlings sown was increased from 1.2 cm in the average shell length to 2.6 cm, from 1.92 g in the average individual fresh weight to 11.6 g, and 25% in the average shell length of 3 cm or more. Barley has an average density of 20 grains/m2, an average size of 87 grains/kg, and a resource of about 0.4 million grains/1000 acres.
2. Actual Benefits Barley introduced a total of about 80 tons of total production, the total cost of 700,000 yuan, the output value of 1.5 million yuan, the average economic benefits of 500 yuan / mu.
VII. Questions and Discussion
1. Jinzhou Bay has a shallow beach book, except for miracidia, and Philippine oysters can be used as a key implementation project. In addition, the cultivation of green oysters should also be used as a development project. If managed properly, it can not only create significant economic benefits and social benefits, but also protect and regulate the ecological environment, resulting in huge ecological benefits. At present, the key issue that restricts the development of barley breeding is the shortage of seedlings. Therefore, the stability of planting seedlings, the amount of seedlings produced, and the quality of intermediate cultivation are particularly important.
2. There is no standard specification for the breeding techniques of barley, and the experimental methods are relatively backward. At present, only relying on the experience of breeding other shallow-sea shellfish, the green-breeding aquaculture industry has not formed a scale and is in the primary stage. It needs to be further rationalized, adjusted, developed and improved. In particular, the scientific site selection and environmental impact assessment of the increased breeding sites of the promotion project are the key links in implementing the environmental management of the barnyard grass breeding industry.
3. Tests have shown that the growth, reproduction, quantity distribution of the indigo striata are closely related to the composition of sediment, the specific gravity of seawater, the temperature of the water, the tide, the turbidity, and the amount of predatory biomass. The suitable water conditions for barley breeding are: water temperature 16°C～28°C, seawater specific gravity 1.010～1.024, pH 7.8～8.6, flow rate 0.05m/s～0.20m/s, dissolved oxygen 6mg/L, sandy bottom The quality of silt is better (viscous fine sand is the next); the seed size is suitable for 300 grains/kg to 400 grains/kg, and the spreading density when shallow seabed sown can be increased to 50,000 grains/mu to 100,000 grains/ Mu, pond density can be limited to 200,000 to 300,000 grains.
4. In September 2005, surveys of the Jinzhou Bay waters showed that the heavy metal content in the shallow sea water of Jinzhou Bay was lower than the national fishery water quality standard, but the content of heavy metals in the sediments near the estuary was slightly higher. Because of the concentration of chlorophyll in coastal waters, the inorganic nitrogen indicators exceed the national second-grade water quality standards. Therefore, the flux of terrigenous pollution into the sea should be strictly controlled. It is suggested that care should be taken when formulating shellfish breeding plans, and that high-risk areas where red tides are likely to occur should be excluded as much as possible.
First, the site selection test site selection is far away from the mouth of the Daling River, near the Jinzhou Saltworks high-household halogen zone, a shallow beach, covering an area of ​​1,000 acres. According to the results of water quality sampling survey and eco-environmental analysis, the high-house brine-producing area near-shore water quality conditions are within the national second-class water quality standards. The water quality is fresh and there is no industrial pollution; the water flow is unobstructed, and it is not susceptible to wind and waves, and the flow rate is moderate (average The flow rate is less than 0.20m/s), it is not easy to make the larvae of the green maggots lost; the turbidity is less than the tidal zone, which will not cause suffocation of the green larvae; the basal silt is suitable for the attachment of the larvae of the green barrows and the larvae of the pups; benthic diatoms Rich, it is conducive to the feeding and growth of young plants. Surveys have shown that the distribution of the major enemy organisms (such as goby, squid, swimming crab, flat jade snail, starfish, and forelimbs) is also significantly less than that in the tidal zone. In short, the water environment of the test site is relatively stable, and it is more suitable for the propagation of barley seedlings.
Second, seed selection and transportation inspection seed production and seed quality can guarantee that the day of arrest, the day of transport is a prerequisite to understand the seed production of water temperature, salinity, seed density (intermediate seedlings) can avoid the introduction and proliferation The water environment difference in the district is too large. We should choose the healthy barley seed with uniform particles, no damage, no wrong shell and no parasite, and fully prepare the transportation equipment and measures. Before transporting the young larvae (bags), they must ensure that their seedlings are pure, remove the dead medaka seedlings, and smash the seedlings of the larvae, and must not possess predator organisms. For long-distance transportation over 8 hours, cooling and ventilation facilities must be provided, and the transportation survival rate can reach over 90%.
Third, broadcast time and methods
1. Spreading time In June and August 2004, two batches were sowed in the field; in June 2005, the third batch of locally grown green barley seed was sowed.
2. Spreading method The submerged zone is broadcasted at the bottom of the tide, that is, when the tide is high, the green barley seed is sown uniformly on the beach of the test site, allowing it to dive into the ground slowly.
Fourth, seed sources and dissemination density Barley seedlings were taken from natural seedlings and intermediate breeds in Binzhou, Shandong Province. The first group of 36 ton barley seedlings had an average size of 700 grains/kg to 800 grains/kg, a seedling density of 36 kg/mu (approximately 25,000 grains/acre to 28,000 grains/acre), and the second batch of 15 ton barley seedlings. , The average size of 300 grains / kg 400 grains / kg, seedling density 15kg / acre (about 4500 / acre - 6000 grains / acre), the third batch of barley seedlings 3t, from the middle of the cultivation of green barley seedlings The average specifications for the shell length 1.5cm ~ 2cm, sowing area of ​​20 acres, the average seedling density 150kg/mu.
V. Management measures
1. The way of culturing and cultivating focuses on the sustainable development and the long-term care of healthy farming, and the way of cultivating on the beach. That is to say, the aquaculture area is one-half of the scope of the right to ensure the rights. The rest of the area is in the state of natural resources management. After two to three years, it will be moved to a blank beach for renewal, in order to facilitate the full decomposition of organic matter and harmful substances accumulated in the culture beach. Ecological deterioration caused by circulating culture.
2. The management method clearly defined the scope of the inbreeding area and equipped with a 60-horsepower fishing boat to be responsible for the daily management, implement fixed-position and position-based care, and prevent theft and indiscriminate mining.
3. Regularly check once every 10 days to 15 days to test the growth status, water quality, and disease death status of the barley. The water temperature was measured at regular intervals from 8 am to 15 pm and records were filed.
4. The regular removal of predator creatures, the specific method is to catch under the crab nets.
Six, proliferation results
1. Proliferation Effect From June 2004 to October 2005, the number of seedlings sown was increased from 1.2 cm in the average shell length to 2.6 cm, from 1.92 g in the average individual fresh weight to 11.6 g, and 25% in the average shell length of 3 cm or more. Barley has an average density of 20 grains/m2, an average size of 87 grains/kg, and a resource of about 0.4 million grains/1000 acres.
2. Actual Benefits Barley introduced a total of about 80 tons of total production, the total cost of 700,000 yuan, the output value of 1.5 million yuan, the average economic benefits of 500 yuan / mu.
VII. Questions and Discussion
1. Jinzhou Bay has a shallow beach book, except for miracidia, and Philippine oysters can be used as a key implementation project. In addition, the cultivation of green oysters should also be used as a development project. If managed properly, it can not only create significant economic benefits and social benefits, but also protect and regulate the ecological environment, resulting in huge ecological benefits. At present, the key issue that restricts the development of barley breeding is the shortage of seedlings. Therefore, the stability of planting seedlings, the amount of seedlings produced, and the quality of intermediate cultivation are particularly important.
2. There is no standard specification for the breeding techniques of barley, and the experimental methods are relatively backward. At present, only relying on the experience of breeding other shallow-sea shellfish, the green-breeding aquaculture industry has not formed a scale and is in the primary stage. It needs to be further rationalized, adjusted, developed and improved. In particular, the scientific site selection and environmental impact assessment of the increased breeding sites of the promotion project are the key links in implementing the environmental management of the barnyard grass breeding industry.
3. Tests have shown that the growth, reproduction, quantity distribution of the indigo striata are closely related to the composition of sediment, the specific gravity of seawater, the temperature of the water, the tide, the turbidity, and the amount of predatory biomass. The suitable water conditions for barley breeding are: water temperature 16°C～28°C, seawater specific gravity 1.010～1.024, pH 7.8～8.6, flow rate 0.05m/s～0.20m/s, dissolved oxygen 6mg/L, sandy bottom The quality of silt is better (viscous fine sand is the next); the seed size is suitable for 300 grains/kg to 400 grains/kg, and the spreading density when shallow seabed sown can be increased to 50,000 grains/mu to 100,000 grains/ Mu, pond density can be limited to 200,000 to 300,000 grains.
4. In September 2005, surveys of the Jinzhou Bay waters showed that the heavy metal content in the shallow sea water of Jinzhou Bay was lower than the national fishery water quality standard, but the content of heavy metals in the sediments near the estuary was slightly higher. Because of the concentration of chlorophyll in coastal waters, the inorganic nitrogen indicators exceed the national second-grade water quality standards. Therefore, the flux of terrigenous pollution into the sea should be strictly controlled. It is suggested that care should be taken when formulating shellfish breeding plans, and that high-risk areas where red tides are likely to occur should be excluded as much as possible.
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