CN111053027A - Method for preventing and treating hypotonic injury of sargassum fusiforme embryos caused by rainfall - Google Patents
Method for preventing and treating hypotonic injury of sargassum fusiforme embryos caused by rainfall Download PDFInfo
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Abstract
The invention discloses a method for preventing and treating Sargassum fusiforme embryos from being damaged by hypotonic caused by rainfall, which comprises six aspects of collecting real-time information of natural rainfall, storing normal salinity seawater, improving the vertical height of the seawater in a seedling pond, monitoring the seawater salinity of the Sargassum fusiforme seedling pond in real time during acute rainfall, replacing the seawater in the seedling pond after the acute rainfall, and the like. The method can be scientifically, systematically and standardly operated to effectively deal with the hypotonic injury of natural acute rainfall on the sargassum fusiforme embryos in the seedling raising pond, so that the production process of sexual reproduction breeding seedlings of sargassum fusiforme artificially utilized is perfected, the seedling attaching rate is effectively improved, the seedling quality is guaranteed, and the agricultural production loss is reduced.
Description
Technical Field
The invention relates to a method for preventing and treating Cyrtymenia Sparsa embryos from being damaged by hypotonic caused by rainfall, which highlights the artificial method for preventing and treating the Cyrtymenia Sparsa embryos from being damaged by hypotonic caused by acute low salinity of seawater in a nursery pond caused by natural rainfall.
Background
Cyrtymenia Sparsa is a large economic brown algae cultured and cultivated artificially in large scale after herba Zosterae Marinae, Eucheuma Gelatinosum and Undaria Pinnatifida. The Hizikia fusiforme has life history including sexual reproduction and asexual reproduction. The cave head region of the Wenzhou city is an industrial base for artificial breeding, cultivation, processing and product export and domestic marketing of the sargassum fusiforme in China. At present, the artificial utilization of sargassum fusiforme sexual reproduction breeding seedlings is a main source for artificial breeding of sargassum fusiforme seedlings.
The season is rainy in summer from 5 months to 6 months, and is also the best period for sexual reproduction of Cyrtymenia Sparsa in Wenzhou city. After the fertilized eggs of the sargassum fusiforme are artificially harvested, the fertilized eggs are uniformly spread and sprinkled on a culture medium (attached seedling curtain) injected into a fresh seawater seedling culture pond, and then the fertilized eggs are continuously and temporarily cultured for 7 to 10 days. The Sargassum fusiforme oosperm cell seedling raising pond gradually develops into young embryos during temporary culture, the young embryos are extremely easy to suffer from acute low-salt seawater stress caused by instant strong rainfall (for a few hours or 1 day) in the growth and development period, the young embryos are excessively hypotonic and die or run off in large quantity, and in severe cases, batches (from the beginning of 5 months to the end of 6 months, three batches of seedlings can be produced by agricultural production) can be produced at a dead time. The coastal areas of Zhejiang, Min and Guangdong are the main areas for landing by typhoon in the western Pacific ocean, and under the influence of the climatic factors, the individual or cooperative breeding farm has almost no perfect rain-proof shed or facility, so that the coupling event between the growth and development stage of the sargassum fusiforme embryo temporarily cultured in the breeding pond and the natural acute rainfall weather occurs every year, and a certain amount of seedlings are lost every time.
The operation of artificially preventing and treating the temporary culture hypotonic injury of the sargassum fusiforme embryo seedling pool mainly comprises the steps of collecting natural rainfall in real time, storing normal salinity seawater, improving the height of a seawater layer in the seedling pool, immediately monitoring the seawater salinity of the sargassum fusiforme seedling pool during acute rainfall, replacing the low salinity seawater in the sargassum fusiforme seedling pool during acute rainfall, replacing the seawater in the seedling pool after the acute rainfall and the like, and the invention aims to highlight the scientificity, systematicness and normalization of the operation process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method for preventing and treating the sargassum fusiforme embryos from being damaged by hypotonic caused by rainfall, which can be used for scientific, systematic and normative operation to effectively deal with the hypotonic damage of natural acute rainfall to the sargassum fusiforme embryos in the seedling raising pond, so that the production process of artificially utilizing the sargassum fusiforme sexual reproduction and seedling breeding is perfected, the seedling attaching rate is effectively improved, the seedling quality is guaranteed, and the agricultural production loss is reduced.
In order to achieve the purpose, the invention provides the following technical scheme: a method for preventing and treating Cyrtymenia Sparsa embryos from being damaged by hypotonic caused by rainfall comprises six aspects of natural rainfall real-time information collection, normal salinity seawater storage, improvement of the vertical height of seawater in a seedling pond, instant seawater salinity monitoring of the Cyrtymenia Sparsa seedling pond during acute rainfall, seawater replacement of the seedling pond after acute rainfall and the like, and specifically comprises the following steps:
1) collecting natural rainfall real-time information: receiving local rainfall real-time information by using a mobile phone, and preparing for prevention and water storage according to the pre-rainfall;
2) storing normal salinity seawater: setting a water storage tank, and storing seawater in the rising tide time and the ebb tide time one day before pre-rainfall, wherein the water storage amount in the water storage tank is 1-2 times of the daily water consumption of the seedling raising tank;
3) improve the vertical height of seawater in the seedling raising pond: one day before pre-rainfall, slowly adding fresh seawater which is stored, filtered and settled to obtain harmless microalgae and has the salinity of 30-33 per thousand, the pH value of 7.8-8.3 into the seedling culture pond, increasing the height of a seawater layer in the seedling culture pond, increasing the vertical height of a single-layer seedling-attached curtain water layer of 25-30 cm to 45-50 cm, and increasing the vertical height of a double-layer seedling-attached curtain water layer of 50-55 cm to the height of 65-70 cm;
4) monitoring the salinity of seawater in the seedling raising pond in a real-time gradient manner during acute rainfall: during acute rainfall, the change condition of the salinity of the seawater in the seedling culture pond needs to be monitored in real time, the method mainly comprises a water layer average point monitoring method and a water layer salinity average value calculation, and the implementation content is as follows:
a. water layer uniform point monitoring method
Before acute rainfall, normal seawater salinity is monitored and recorded, 3-5 detection points are set according to the number of seedling raising ponds, a single-layer seedling attaching curtain with the vertical height of 15-20 cm, 20-35 cm, 35-50 cm and 50-55 cm or a double-layer seedling attaching curtain with the vertical height of 25-35 cm, 35-50 cm, 50-65 cm and 65-70 cm is set at each monitoring point, and 4 water layers are monitored in a vertical gradient mode. Monitoring the salinity of the seawater every 20-30 min during acute rainfall;
b. mean calculation of water layer salinity
After the salinity of each gradient water layer is monitored by each monitoring point, calculating the salinity change mean value of each water layer, comparing the salinity of normal seawater, evaluating the salinity reduction condition of each water layer, and adopting normal salinity seawater to replace low-salt seawater in the seedling culture pond;
5) low-salt seawater replacement in seedling raising pond during acute rainfall
a. The salinity of the seawater on the upper layer of the seedling raising pond is 30-33 ‰
When the salinity of the upper layer and each gradient water layer is 30-33 per mill, slowly injecting seawater with normal salinity, and displacing the seawater mixed with trace rainwater on the upper layer of the seedling culture pond;
b. the salinity of the seawater on the upper layer of the seedling raising pond is 29-25 per mill
When the salinity of the seawater at the bottom of the vertical seedling raising pool is 50-55 cm or 65-70 cm, is 29-25 per thousand, and the salinity of the seawater at the bottom of the vertical seedling raising pool is 35-50 cm or 50-65 cm, is 30-33 per thousand, a polyethylene plastic pipe which is 40-45 cm or 55-60 cm high in height and matched with the caliber of a drain hole at the bottom of the pool is selected, and is inserted into the drain hole, and the low-salinity seawater at the upper layer of the seedling raising pool is drained. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 30-33 per mill is slowly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper-layer seawater in the seedling culture pond is improved. When the vertical height of the seawater in the seedling raising pond is reduced to 40-45 cm or 55-60 cm, a polyethylene plastic pipe with the length of more than or equal to 50-55 cm or 65-70 cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the seawater on the surface layer flows out through the upper opening of the polyethylene plastic pipe; keeping the water injection valve in a slow water injection state;
c. 24-20 per mill of salinity of seawater on the upper layer of the seedling raising pond
When the salinity of the seawater at the bottom of the vertical seedling raising pool is 24-20 per thousand, the salinity of the seawater at the bottom of the vertical seedling raising pool is 29-25 per thousand, the salinity of the seawater at the bottom of the vertical seedling raising pool is 35-50 cm or 50-65 cm, and the salinity of the seawater at the bottom of the vertical seedling raising pool is 30-33 per thousand, a polyethylene plastic pipe which is 25-30 cm or 40-45 cm in height and matched with the caliber of a drainage hole at the bottom of the pool is selected, inserted into the drainage hole and used for timely draining the low-salinity seawater at the upper layer of the seedling raising pool. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 30-33 per mill is injected at medium speed, the discharge of low-salinity seawater is accelerated, and the salinity of upper-layer seawater in the seedling culture pond is improved. When the vertical height of the seawater in the seedling raising pond is reduced to 25-30 cm or 40-45 cm, a polyethylene plastic pipe with the length of more than or equal to 50-55 cm or 65-70 cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the seawater on the surface layer flows out through the upper opening of the polyethylene plastic pipe; a water injection valve is modulated to be in a slow water injection state;
d. the salinity of the seawater on the upper layer of the seedling raising pond is 19-15 ‰
When the salinity of the seawater at the bottom of the vertical seedling raising pool is 19-15 per thousand, the salinity of the seawater at the bottom of the vertical seedling raising pool is 35-50 cm or 50-65 cm, the salinity of the seawater at the bottom of the vertical seedling raising pool is 24-20 per thousand, and the salinity of the seawater at the bottom of the vertical seedling raising pool is 20-35 cm or 35-50 cm, and the salinity of the seawater at the bottom of the vertical seedling raising pool is 30-33 per thousand, a polyethylene plastic pipe which is 15-20 cm or 30-35 cm in height and matched with the caliber of a drainage hole at the bottom of the pool is selected, inserted into the drainage hole, and the low-salinity seawater at the. Meanwhile, a water injection valve is opened, pre-stored seawater with salinity of 30-33 per mill is quickly injected, low-salinity seawater discharge is accelerated, and salinity of upper seawater in the seedling culture pond is improved. When the vertical height of the seawater in the seedling raising pond is reduced to 15-20 cm or 30-35 cm, a polyethylene plastic pipe with the length of more than or equal to 50-55 cm or 65-70 cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the seawater on the surface layer flows out through the upper opening of the polyethylene plastic pipe; a water injection valve is modulated to be in a slow water injection state;
e. the salinity of the seawater on the upper layer of the seedling raising pond is 14-10 per mill
The seawater salinity of the bottom layer of the vertical seedling raising pool is 14-10 per thousand, the seawater salinity of the vertical bottom layer is 35-50 cm or 50-65 cm, the seawater salinity of the vertical bottom layer is 19-15 per thousand, the seawater salinity of the vertical bottom layer is 20-35 cm or 35-50 cm, the seawater salinity of the vertical bottom layer is 29-25 per thousand, and when the seawater salinity of the vertical bottom layer is 15-20 cm or 25-35 cm, a polyethylene plastic pipe which is 15-20 cm or 30-35 cm and is matched with the caliber of a drain hole in the bottom of the pool is selected, the polyethylene plastic pipe is inserted into the drain hole, and the low-salinity seawater in the upper layer of the seedling raising pool is drained timely. Meanwhile, a water injection valve is opened, pre-stored seawater with salinity of 30-33 per mill is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper-layer seawater in the seedling culture pond is improved. When the vertical height of the seawater in the seedling raising pool is reduced to 15-20 cm or 30-35 cm, a polyethylene plastic pipe with the length of more than or equal to 50-55 cm or 65-70 cm is selected to be inserted into the drain hole, the water level of the seedling raising pool is increased until the seawater on the surface layer flows out through the upper opening of the polyethylene plastic pipe; a water injection valve is modulated to be in a slow water injection state;
f. the salinity of the seawater on the upper layer of the seedling raising pond is 9-0 ‰
When the salinity of the seawater below 15-20 cm or 25-35 cm in the bottom layer of the vertical seedling raising pool is 9-0 per mill, taking out the seedling attaching curtain in the seedling raising pool, temporarily placing the seedling attaching curtain in a seawater pool with the salinity of 30-33 per mill, simultaneously opening the drain hole, completely discharging the low-salinity seawater in the seedling raising pool, re-injecting the seawater with the salinity of 30-33 per mill with the height of 50-55 cm or 65-70 cm, and re-hanging the seedling attaching curtain in the seedling raising pool; a water injection valve is modulated to be in a slow water injection state;
6) and (3) seawater replacement in the seedling raising pond after acute rainfall: after acute rainfall, the salinity of the seawater is monitored, when the salinity is changed to 30-33 per mill by natural tide, the natural seawater is extracted, filtered and settled, and then the seawater in the seedling culture pond is completely replaced.
In conclusion, the invention has the following beneficial effects: according to the salinity dilution physical effect, the vertical height of the seawater in the seedling pool is improved, the time of reducing the salinity of the seawater in the seedling pool by acute rainfall is favorably delayed, and the operation time is created for artificially preventing and treating the low-salinity seawater from harming the low-permeability of the sargassum fusiforme embryos. When acute natural rainfall occurs, a treatment method of accurately and effectively draining water and controlling water injection to maintain the salinity of the seawater is adopted in time according to the salinity change of each water layer, and the sargassum fusiforme embryos are temporarily transferred as necessary, so that hypotonic damage or injury of the sargassum fusiforme embryos caused by low-salt seawater is avoided, and excessive waste of time caused by excessive drainage and water injection is avoided to cause damage to the sargassum fusiforme embryos. The scientific, systematic and normative operation can effectively deal with the hypotonic injury of natural acute rainfall on the sargassum fusiforme embryos in the seedling raising pond, so that the production process of artificially utilizing the sargassum fusiforme sexual reproduction breeding seedlings is perfected, the spatfall rate is effectively improved, the seedling quality is guaranteed, and the agricultural production loss is reduced.
Detailed Description
Example 1: during the temporary rearing period of the nursery pond in the embryo growth and development stage of the fry bred by artificially utilizing the sexual reproduction of the sargassum fusiforme, the embodiment assumes sudden small rain level rainfall.
As a first embodiment of the invention, the artificial control method is suitable for artificial control of the rapid reduction of the salinity of the seawater in the sargassum fusiforme seedling culture pond caused by acute light rain level natural rainfall, and the artificial control method for the hypotonic injury of sargassum fusiforme embryos in the seedling culture pond caused by the acute natural rainfall mainly comprises the following steps:
1) collecting natural rainfall real-time information: receiving local rainfall real-time information by using a mobile phone, and preparing for prevention and water storage according to the pre-rainfall;
2) storing normal salinity seawater: one day before pre-rainfall, selecting the time periods of flood tide and flat tide to store seawater, wherein the water storage amount in the water storage pool is 1 time of the daily water consumption of the seedling raising pool;
3) improve the vertical height of seawater in the seedling raising pond: one day before rainfall in advance, fresh seawater which is stored, filtered and settled to have salinity of 33 per thousand and pH of 8.3 and is harmless to microalgae is slowly added into the seedling pool, the height of the seawater layer in the seedling pool is increased, the vertical height of the single-layer seedling-attached curtain water layer is increased to 50cm from 30cm, and the vertical height of the double-layer seedling-attached curtain water layer is increased to 70cm from 55 cm;
4) monitoring the salinity of seawater in the seedling raising pond in a real-time gradient manner during acute rainfall: during acute rainfall, the change condition of the salinity of the seawater in the seedling culture pond needs to be monitored in real time, the method mainly comprises a water layer average point monitoring method and a water layer salinity average value calculation, and the implementation content is as follows:
a. water layer uniform point monitoring method
Before acute rainfall, normal seawater salinity is monitored and recorded, 3-5 detection points are set according to the number of seedling culture ponds, a single-layer seedling attaching curtain with the vertical height of 20cm, 35cm, 50cm and 55cm or a double-layer seedling attaching curtain with the vertical height of 35cm, 50cm, 65cm and 70cm is set at each detection point, and 4 water layers are monitored in a vertical gradient mode. During acute rainfall, monitoring the salinity of the seawater every 30 min;
b. mean calculation of water layer salinity
After the salinity of each gradient water layer is monitored by each monitoring point, calculating the salinity change mean value of each water layer, comparing the salinity of normal seawater, evaluating the salinity reduction condition of each water layer, and adopting normal salinity seawater to replace the low-salt seawater in the seedling culture pond for operation;
5) low-salt seawater replacement in seedling raising pond during acute rainfall
a. The salinity of the seawater on the upper layer of the seedling raising pond is 33 per mill
When the salinity of the upper layer and each gradient water layer is 33 per mill, slowly injecting seawater with normal salinity, and replacing the seawater mixed with trace rainwater on the upper layer of the seedling culture pond;
b. the salinity of the seawater on the upper layer of the seedling raising pond is 29 per mill
When the salinity of the seawater with the height of 55cm or 70cm at the bottom of the vertical seedling raising pool is 29 per thousand, and the salinity of the seawater with the height of 50cm or 65cm at the bottom of the vertical seedling raising pool is 33 per thousand, a polyethylene plastic pipe with the height of 45cm or 60cm at the bottom of the vertical seedling raising pool and the caliber of a water drainage hole at the bottom of the vertical seedling raising pool is selected, inserted into the water drainage hole, and the low-salinity seawater at the upper layer of the seedling raising pool is drained in time. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 33 per mill is slowly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 45cm or 60cm, a polyethylene plastic pipe with the length of 55cm or 70cm is selected to be inserted into the drainage hole, and the water level of the seedling raising pond is increased until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Keeping the water injection valve in a slow water injection state;
c. the salinity of the seawater on the upper layer of the seedling raising pond is 24 per mill
When the salinity of the seawater with the height of 55cm or 70cm at the bottom of the vertical seedling raising pool is 24 per thousand, the salinity of the seawater with the height of 50cm or 65cm at the vertical bottom is 29 per thousand, and the salinity of the seawater with the height of 35cm or 50cm at the vertical bottom is 33 per thousand, a polyethylene plastic pipe with the height of 30cm or 45cm at the vertical bottom and matched with the caliber of a water drainage hole at the bottom of the pool is selected, a water drainage hole is inserted, and the low-salinity seawater at the upper layer of the seedling raising pool is drained in time. Meanwhile, a water injection valve is opened, pre-stored seawater with 33 per mill of salinity is injected at medium speed, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 30cm or 45cm, a polyethylene plastic pipe with the length of 55cm or 70cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is raised until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Regulating a water injection valve to a slow water injection state;
d. the salinity of the seawater on the upper layer of the seedling raising pond is 19 per mill
When the salinity of the seawater with the height of 55cm or 70cm at the bottom of the vertical seedling raising pool is 19 per thousand, the salinity of the seawater with the height of 50cm or 65cm at the vertical bottom is 24 per thousand, and the salinity of the seawater with the height of 35cm or 50cm at the vertical bottom is 33 per thousand, a polyethylene plastic pipe with the height of 20cm or 35cm at the vertical bottom and matched with the caliber of a water drainage hole at the bottom of the pool is selected, a water drainage hole is inserted, and the low-salinity seawater at the upper layer of the seedling raising pool is drained in time. Meanwhile, a water injection valve is opened, pre-stored seawater with 33 per mill of salinity is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 20cm or 35cm, a polyethylene plastic pipe with the length of 55cm or 70cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is raised until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Regulating a water injection valve to a slow water injection state;
e. the salinity of the seawater on the upper layer of the seedling raising pond is 14 per mill
When the salinity of the seawater with the height of 55cm or 70cm at the bottom of the vertical seedling raising pool is 14 per thousand, the salinity of the seawater with the height of 50cm or 65cm at the vertical bottom is 19 per thousand, the salinity of the seawater with the height of 35cm or 50cm at the vertical bottom is 29 per thousand and the salinity of the seawater with the height of 20cm or 35cm at the vertical bottom is 33 per thousand, a polyethylene plastic pipe with the height of 20cm or 35cm at the vertical bottom and matched with the diameter of a drainage hole at the bottom of the pool is selected, a drainage hole is inserted, and the low-salinity seawater at the upper layer of the seedling raising pool is drained. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 33 per mill is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 20cm or 35cm, a polyethylene plastic pipe with the length of 55cm or 70cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. A water injection valve is modulated to be in a slow water injection state;
f. the salinity of the seawater on the upper layer of the seedling raising pond is 9 per mill
When the salinity of the seawater below 20cm or 35cm in the bottom layer of the vertical seedling raising pool is 9 per mill, taking out the seedling attaching curtain in the seedling raising pool, temporarily placing the seedling attaching curtain in a seawater pool with the salinity of 33 per mill, simultaneously opening the drain hole, completely draining the low-salinity seawater in the seedling raising pool, re-injecting the seawater with the salinity of 33 per mill and 55cm or 70cm, and then hanging the seedling attaching curtain in the seedling raising pool again. A water injection valve is modulated to be in a slow water injection state;
6) and (3) seawater replacement in the seedling raising pond after acute rainfall: after acute rainfall, the salinity of the seawater is monitored, when the seawater is exchanged to 33 per mill of salinity by natural tide, the natural seawater is extracted, filtered and settled, and then the seawater in the seedling culture pond is completely replaced.
Example 2 was carried out: in the temporary culture period of the nursery pond in the embryo growth and development stage of the fry bred by the sexual reproduction of the sargassum fusiforme artificially, the sudden rain-level rainfall is assumed in the embodiment.
As a second embodiment of the present invention, the method is suitable for artificial control of rapid reduction of seawater salinity in the Cyrtymenia Sparsa seedling pond caused by acute moderate-rain natural rainfall, and the artificial control method of hypotonic injury of Cyrtymenia Sparsa embryo in the seedling pond caused by natural acute rainfall mainly comprises the following steps:
1) collecting natural rainfall real-time information: receiving local rainfall real-time information by using a mobile phone, and preparing for prevention and water storage according to the pre-rainfall;
2) storing normal salinity seawater: one day before pre-rainfall, selecting the time periods of flood tide and flat tide to store seawater, wherein the water storage amount in the water storage pool is 1.5 times of the daily water consumption of the seedling raising pool;
3) improve the vertical height of seawater in the seedling raising pond: one day before rainfall in advance, slowly adding fresh seawater which is stored, filtered and settled to obtain harmless microalgae and has the salinity of 31 per thousand and the pH value of 8.0 into the seedling pool, increasing the height of a seawater layer in the seedling pool, increasing the vertical height of a single-layer seedling-attached curtain water layer of 25cm to 50cm, and increasing the vertical height of a double-layer seedling-attached curtain water layer of 55cm to 70 cm;
4) monitoring the salinity of seawater in the seedling raising pond in a real-time gradient manner during acute rainfall: during acute rainfall, the change condition of the salinity of the seawater in the seedling culture pond needs to be monitored in real time, the method mainly comprises a water layer average point monitoring method and a water layer salinity average value calculation, and the implementation content is as follows:
a. water layer uniform point monitoring method
Before acute rainfall, normal seawater salinity is monitored and recorded, 3-5 detection points are set according to the number of seedling culture ponds, a single-layer seedling attaching curtain with the vertical height of 15cm, 35cm, 50cm and 55cm or a double-layer seedling attaching curtain with the vertical height of 35cm, 50cm, 65cm and 70cm is set at each detection point, and 4 water layers are monitored in a vertical gradient mode. During acute rainfall, monitoring the salinity of the seawater every 25 min;
b. mean calculation of water layer salinity
After the salinity of each gradient water layer is monitored by each monitoring point, calculating the salinity change mean value of each water layer, comparing the salinity of normal seawater, evaluating the salinity reduction condition of each water layer, and adopting normal salinity seawater to replace the low-salt seawater in the seedling culture pond for operation;
5) low-salt seawater replacement in seedling raising pond during acute rainfall
a. The salinity of the seawater on the upper layer of the seedling raising pond is 31 per mill
When the salinity of the upper layer and each gradient water layer is 31 per mill, slowly injecting seawater with normal salinity, and replacing the seawater mixed with trace rainwater on the upper layer of the seedling culture pond;
b. the salinity of the seawater on the upper layer of the seedling raising pond is 27 per mill
When the salinity of the seawater at the bottom of the vertical seedling raising pool is 27 per thousand with the height of 50cm or 65cm, and the salinity of the seawater at the bottom of the vertical seedling raising pool is 31 per thousand with the height of 35cm or 50cm, a polyethylene plastic pipe which is 45cm or 60cm high with the height of the vertical bottom and is matched with the caliber of a drain hole at the bottom of the pool is selected, and the polyethylene plastic pipe is inserted into the drain hole to drain the low-salinity seawater at the upper layer of the seedling raising pool in time. Meanwhile, a water injection valve is opened, pre-stored seawater with 31 per mill of salinity is slowly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 45cm or 60cm, a polyethylene plastic pipe with the length of 50cm or 70cm is selected to be inserted into the drainage hole, and the water level of the seedling raising pond is increased until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Keeping the water injection valve in a slow water injection state;
c. the salinity of the seawater on the upper layer of the seedling raising pond is 22 per mill
When the salinity of the seawater with the height of 50cm or 65cm at the bottom of the vertical seedling raising pool is 22 per thousand, the salinity of the seawater with the height of 35cm or 50cm at the bottom of the vertical seedling raising pool is 27 per thousand, and the salinity of the seawater with the height of 25cm or 50cm at the bottom of the vertical seedling raising pool is 31 per thousand, a polyethylene plastic pipe with the height of 30cm or 45cm at the bottom of the vertical seedling raising pool and the caliber of a water drainage hole at the bottom of the vertical seedling raising pool are selected, a water drainage hole is inserted, and the low-salinity seawater. Meanwhile, a water injection valve is opened, pre-stored seawater with 31 per mill of salinity is injected at medium speed, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 30cm or 45cm, a polyethylene plastic pipe with the length of 55cm or 70cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is raised until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Regulating a water injection valve to a slow water injection state;
d. the salinity of the seawater on the upper layer of the seedling raising pond is 17 per mill
When the salinity of the seawater with the height of 50cm or 65cm at the bottom of the vertical seedling raising pool is 17 per thousand, the salinity of the seawater with the height of 35cm or 50cm at the bottom of the vertical seedling raising pool is 22 per thousand, and the salinity of the seawater with the height of 25cm or 50cm at the bottom of the vertical seedling raising pool is 31 per thousand, a polyethylene plastic pipe with the height of 20cm or 35cm at the bottom of the vertical seedling raising pool and the caliber of a water drainage hole at the bottom of the vertical seedling raising pool are matched, a water drainage hole is inserted, and the low-salinity seawater. Meanwhile, a water injection valve is opened, pre-stored seawater with 31 per mill of salinity is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 20cm or 35cm, a polyethylene plastic pipe with the length of 55cm or 70cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is raised until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Regulating a water injection valve to a slow water injection state;
e. the salinity of the seawater on the upper layer of the seedling raising pond is 12 per mill
When the salinity of the seawater at the bottom layer of the vertical seedling raising pool is 50cm or 65cm, the salinity of the seawater at the bottom layer of the vertical seedling raising pool is 12 per thousand, the salinity of the seawater at the bottom layer of the vertical seedling raising pool is 35 per thousand, the salinity of the seawater at the bottom layer of the vertical seedling raising pool is 20cm or 35cm, the salinity of the seawater at the bottom layer of the vertical seedling raising pool is 27 per thousand, and the salinity at the bottom layer of the vertical seedling raising pool is 31 per thousand, a polyethylene plastic pipe which is 15cm or 30cm high and is matched with the diameter of a drainage hole at the bottom of the vertical seedling raising pool is selected. Meanwhile, a water injection valve is opened, pre-stored seawater with 31 per mill of salinity is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 15cm or 30cm, a polyethylene plastic pipe with the length of 55cm or 70cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. A water injection valve is modulated to be in a slow water injection state;
f. the salinity of the seawater on the upper layer of the seedling raising pond is 5 per mill
When the salinity of the seawater below 15cm or below 25cm in the bottom layer of the vertical seedling raising pool is 5 per mill, the seedling attaching curtain in the seedling raising pool is taken out and temporarily placed in a seawater pool with 31 per mill salinity, meanwhile, a drain hole is opened, the low-salinity seawater in the seedling raising pool is completely drained, the seawater with 55cm or 70cm high and 31 per mill salinity is re-injected, and then the seedling attaching curtain is hung in the seedling raising pool again. A water injection valve is modulated to be in a slow water injection state;
6) and (3) seawater replacement in the seedling raising pond after acute rainfall: after acute rainfall, the salinity of the seawater is monitored, when the seawater is exchanged to 31 per mill of salinity by natural tide, the natural seawater is extracted, filtered and settled, and then the seawater in the seedling culture pond is completely replaced.
Example 3 was carried out: in the temporary culture period of the nursery pond in the embryo growth and development stage of the fry bred by the sexual reproduction of the sargassum fusiforme artificially, the sudden exposure to acute rainstorm or heavy rain-level natural rainfall is assumed in the embodiment.
As a third embodiment of the present invention, the method is suitable for artificial control of rapid reduction of seawater salinity in the seedling pond of Hizikia fusiforme caused by acute rainstorm or heavy rain-level natural rainfall, and the artificial control method of hypotonic injury of Hizikia fusiforme embryos in the seedling pond caused by natural acute rainfall mainly comprises the following steps:
1) collecting natural rainfall real-time information: receiving local rainfall real-time information by using a mobile phone, and preparing for prevention and water storage according to the pre-rainfall;
2) storing normal salinity seawater: establishing a water storage tank, and storing seawater in the rising tide time period and the ebb tide time period one day before pre-rainfall, wherein the water storage amount in the water storage tank is 2 times of the daily water consumption of the seedling raising tank;
3) improve the vertical height of seawater in the seedling raising pond: one day before rainfall in advance, slowly adding fresh seawater which is stored, filtered and settled to obtain harmless microalgae and has the salinity of 30 per thousand, the pH value of 7.8 and the sediment into the seedling pool, increasing the height of a seawater layer in the seedling pool, increasing the vertical height of 25cm of a single-layer seedling-attached curtain water layer to 45cm, and increasing the vertical height of 50cm of a double-layer seedling-attached curtain water layer to 60 cm;
4) monitoring the salinity of seawater in the seedling raising pond in a real-time gradient manner during acute rainfall: during acute rainfall, the change condition of the salinity of the seawater in the seedling culture pond needs to be monitored in real time, the method mainly comprises a water layer average point monitoring method and a water layer salinity average value calculation, and the implementation content is as follows:
a. water layer uniform point monitoring method
Before acute rainfall, normal seawater salinity is monitored and recorded, 3-5 detection points are set according to the number of seedling culture ponds, a single-layer seedling attaching curtain with the vertical height of 15cm, 20cm, 35cm and 50cm or a double-layer seedling attaching curtain with the vertical height of 25cm, 35cm, 50cm and 65cm is set at each detection point, and 4 water layers are monitored in a vertical gradient mode. During acute rainfall, monitoring the salinity of the seawater every 20 min;
b. mean calculation of water layer salinity
After the salinity of each gradient water layer is monitored by each monitoring point, calculating the salinity change mean value of each water layer, comparing the salinity of normal seawater, evaluating the salinity reduction condition of each water layer, and adopting normal salinity seawater to replace the low-salt seawater in the seedling culture pond for operation;
5) low-salt seawater replacement in seedling raising pond during acute rainfall
a. The salinity of the seawater on the upper layer of the seedling raising pond is 30 per mill
When the salinity of the upper layer and each gradient water layer is 30 per mill, slowly injecting seawater with normal salinity, and replacing the seawater mixed with trace rainwater on the upper layer of the seedling culture pond;
b. the salinity of the seawater on the upper layer of the seedling raising pond is 25 per mill
When the salinity of the seawater at the bottom of the vertical seedling raising pool is 25 per thousand with the height of 50cm or 65cm and the salinity of the seawater at the bottom of the vertical seedling raising pool is 30 per thousand with the height of 35cm or 50cm, a polyethylene plastic pipe which is 40cm or 55cm high with the height of the vertical bottom and is matched with the caliber of a drain hole at the bottom of the pool is selected, and the polyethylene plastic pipe is inserted into the drain hole to drain the low-salinity seawater at the upper layer of the seedling raising pool in time. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 30 per mill is slowly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 40cm or 55cm, a polyethylene plastic pipe with the length of 50cm or 65cm is selected to be inserted into the drainage hole, and the water level of the seedling raising pond is increased until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Keeping the water injection valve in a slow water injection state;
c. the salinity of the seawater on the upper layer of the seedling raising pond is 20 per mill
When the salinity of the seawater with the height of 50cm or 65cm at the bottom of the vertical seedling raising pool is 20 per thousand, the salinity of the seawater with the height of 35cm or 50cm at the bottom of the vertical seedling raising pool is 25 per thousand, and the salinity of the seawater with the height of 20cm or 35cm at the bottom of the vertical seedling raising pool is 30 per thousand, a polyethylene plastic pipe with the height of 25cm or 40cm at the bottom of the vertical seedling raising pool and the caliber of a water drainage hole at the bottom of the vertical seedling raising pool are matched, a water drainage hole is inserted, and the low-salinity seawater. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 30 per mill is injected at the medium speed, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 25cm or 40cm, a polyethylene plastic pipe with the length of 50cm or 65cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is raised until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Regulating a water injection valve to a slow water injection state;
d. the salinity of the seawater on the upper layer of the seedling raising pond is 15 per mill
When the salinity of the seawater with the height of 50cm or 65cm at the bottom of the vertical seedling raising pool is 15 per thousand, the salinity of the seawater with the height of 35cm or 50cm at the bottom of the vertical seedling raising pool is 20 per thousand, and the salinity of the seawater with the height of 20cm or 35cm at the bottom of the vertical seedling raising pool is 30 per thousand, a polyethylene plastic pipe with the height of 15cm or 30cm at the bottom of the vertical seedling raising pool and matched with the caliber of a drainage hole at the bottom of the vertical seedling raising pool is selected, a drainage hole is inserted, and the low-salinity seawater. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 30 per mill is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 15cm or 30cm, a polyethylene plastic pipe with the length of 50cm or 65cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is raised until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. Regulating a water injection valve to a slow water injection state;
e. the salinity of the seawater on the upper layer of the seedling raising pond is 10 per mill
When the salinity of the seawater with the height of 50cm or 65cm at the bottom of the vertical seedling raising pool is 10 per thousand, the salinity of the seawater with the height of 35cm or 50cm at the bottom of the vertical seedling raising pool is 15 per thousand, the salinity of the seawater with the height of 20cm or 35cm at the bottom of the vertical seedling raising pool is 25 per thousand, and the salinity of the seawater with the height of 15cm or 25cm at the bottom of the vertical seedling raising pool is 30 per thousand, a polyethylene plastic pipe with the height of 15cm or 30cm at the bottom of the vertical seedling raising pool and matched with the diameter of a drainage hole at the bottom of the vertical seedling raising pool is selected. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 30 per mill is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper seawater in the seedling culture pond is improved. And when the vertical height of the seawater in the seedling raising pond is reduced to 15cm or 30cm, a polyethylene plastic pipe with the length of 50cm or 65cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the surface seawater flows out through the upper opening of the polyethylene plastic pipe. A water injection valve is modulated to be in a slow water injection state;
f. the salinity of the seawater on the upper layer of the seedling raising pond is 0 thousandth
When the salinity of the seawater below 15cm or below 25cm in the bottom layer of the vertical seedling raising pool is 0 per thousand, taking out the seedling attaching curtain in the seedling raising pool, temporarily placing the seedling attaching curtain in a seawater pool with the salinity of 30 per thousand, simultaneously opening the drain hole, completely draining the low-salinity seawater in the seedling raising pool, re-injecting the seawater with the salinity of 30 per thousand and 50cm or 65cm, and then hanging the seedling attaching curtain in the seedling raising pool again. A water injection valve is modulated to be in a slow water injection state;
6) and (3) seawater replacement in the seedling raising pond after acute rainfall: after acute rainfall, the salinity of the seawater is monitored, when the salinity is changed to 30 per mill by natural tide, the natural seawater is extracted, filtered and settled, and then the seawater in the seedling culture pond is completely replaced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. A method for preventing and treating Cyrtymenia Sparsa embryos from being damaged by hypotonic caused by rainfall comprises six aspects of natural rainfall real-time information collection, normal salinity seawater storage, improvement of the vertical height of seawater in a nursery pond, instant seawater salinity monitoring of the Cyrtymenia Sparsa nursery pond during acute rainfall, seawater replacement of the nursery pond after acute rainfall and the like, and specifically comprises the following steps:
1) collecting natural rainfall real-time information: receiving local rainfall real-time information by using a mobile phone, and preparing for prevention and water storage according to the pre-rainfall;
2) storing normal salinity seawater: setting a water storage tank, and selecting a tide rising period and a tide leveling period to store seawater one day before pre-rainfall, wherein the water storage amount in the water storage tank is 1-2 times of the daily water consumption of the seedling raising tank;
3) improve the vertical height of seawater in the seedling raising pond: one day before rainfall in advance, slowly adding fresh seawater which is stored, filtered and settled to obtain harmless microalgae and has the salinity of 30-33 per thousand, the pH value of 7.8-8.3 into the seedling pool, increasing the height of a seawater layer in the seedling pool, increasing the height of a single-layer seedling-attached curtain water layer of 25-30 cm to 45-50 cm, and increasing the height of a double-layer seedling-attached curtain water layer of 50-55 cm to the height of 65-70 cm;
4) monitoring the salinity of seawater in the seedling raising pond in a real-time gradient manner during acute rainfall: during acute rainfall, the change condition of the salinity of the seawater in the seedling raising pond needs to be monitored in real time, the method mainly comprises a water layer average point monitoring method and a water layer salinity average value calculation, and the implementation content is as follows:
a. water layer uniform point monitoring method
Before acute rainfall, normal seawater salinity is monitored and recorded, 3-5 detection points are set according to the number of seedling raising ponds, a single-layer seedling attaching curtain with the vertical height of 15-20 cm, 20-35 cm, 35-50 cm and 50-55 cm or a double-layer seedling attaching curtain with the vertical height of 25-35 cm, 35-50 cm, 50-65 cm and 65-70 cm is set at each monitoring point, and 4 water layers are monitored in a vertical gradient mode. Monitoring the salinity of the seawater every 20-30 min during acute rainfall;
b. mean calculation of water layer salinity
After the salinity of each gradient water layer is monitored by each monitoring point, calculating the salinity change mean value of each water layer, comparing the salinity of normal seawater, evaluating the salinity reduction condition of each water layer, and adopting normal salinity seawater to replace low-salt seawater in the seedling culture pond;
5) low-salt seawater replacement in seedling raising pond during acute rainfall
a. The salinity of the seawater on the upper layer of the seedling raising pond is 30-33 ‰
When the salinity of the upper layer and each gradient water layer is 30-33 per mill, slowly injecting seawater with normal salinity, and displacing the seawater mixed with trace rainwater on the upper layer of the seedling culture pond;
b. the salinity of the seawater on the upper layer of the seedling raising pond is 29-25 per mill
When the salinity of the seawater at the bottom of the vertical seedling raising pool is 29-25 per thousand and the salinity of the seawater at the bottom of the vertical seedling raising pool is 35-50 cm or 50-65 cm, and the salinity of the seawater at the bottom of the vertical seedling raising pool is 30-33 per thousand, a polyethylene plastic pipe which is 40-45 cm or 55-60 cm high and matched with the caliber of a drain hole at the bottom of the pool is selected, and the polyethylene plastic pipe is inserted into the drain hole to timely drain the low-salinity seawater at the upper layer of the seedling raising pool. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 30-33 per mill is slowly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper-layer seawater in the seedling culture pond is improved. When the vertical height of the seawater in the seedling raising pond is reduced to 40-45 cm or 55-60 cm, a polyethylene plastic pipe with the length of more than or equal to 50-55 cm or 65-70 cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the seawater on the surface layer flows out through the upper opening of the polyethylene plastic pipe; keeping the water injection valve in a slow water injection state;
c. 24-20 per mill of salinity of seawater on the upper layer of the seedling raising pond
When the salinity of the seawater at the bottom of the vertical seedling raising pool is 24-20 per thousand, the salinity of the seawater at the bottom of the vertical seedling raising pool is 29-25 per thousand, the salinity of the seawater at the bottom of the vertical seedling raising pool is 35-50 cm or 50-65 cm, and the salinity of the seawater at the bottom of the vertical seedling raising pool is 30-33 per thousand, a polyethylene plastic pipe which is 25-30 cm or 40-45 cm in height and matched with the caliber of a drain hole at the bottom of the pool is selected, inserted into the drain hole, and the low-salinity seawater at the upper layer of the seedling raising pool is drained in time. Meanwhile, a water injection valve is opened, pre-stored seawater with the salinity of 30-33 per mill is injected at medium speed, the discharge of low-salinity seawater is accelerated, and the salinity of upper-layer seawater in the seedling culture pond is improved. When the vertical height of the seawater in the seedling raising pond is reduced to 25-30 cm or 40-45 cm, a polyethylene plastic pipe with the length of more than or equal to 50-55 cm or 65-70 cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the seawater on the surface layer flows out through the upper opening of the polyethylene plastic pipe; a water injection valve is modulated to be in a slow water injection state;
d. the salinity of the seawater on the upper layer of the seedling raising pond is 19-15 ‰
When the salinity of the seawater at the bottom of the vertical seedling raising pool is 19-15 per thousand, the salinity of the seawater at the bottom of the vertical seedling raising pool is 24-20 per thousand, the salinity of the seawater at the bottom of the vertical seedling raising pool is 35-50 cm or 50-65 cm, and the salinity of the seawater at the bottom of the vertical seedling raising pool is 30-33 per thousand, a polyethylene plastic pipe which is 15-20 cm or 30-35 cm in height and matched with the caliber of a drain hole at the bottom of the pool is selected, inserted into the drain hole, and the low-salinity seawater at the upper layer of the seedling raising pool is drained in time. Meanwhile, a water injection valve is opened, pre-stored seawater with salinity of 30-33 per mill is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper-layer seawater in the seedling culture pond is improved. When the vertical height of the seawater in the seedling raising pond is reduced to 15-20 cm or 30-35 cm, a polyethylene plastic pipe with the length of more than or equal to 50-55 cm or 65-70 cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the seawater on the surface layer flows out through the upper opening of the polyethylene plastic pipe; a water injection valve is modulated to be in a slow water injection state;
e. the salinity of the seawater on the upper layer of the seedling raising pond is 14-10 per mill
The seawater salinity of the bottom layer of the vertical seedling raising pool is 14-10 per thousand, the seawater salinity of the vertical bottom layer is 35-50 cm or 50-65 cm, the seawater salinity of the vertical bottom layer is 19-15 per thousand, the seawater salinity of the vertical bottom layer is 20-35 cm or 35-50 cm, the seawater salinity of the vertical bottom layer is 29-25 per thousand, and when the seawater salinity of the vertical bottom layer is 15-20 cm or 25-35 cm, a polyethylene plastic pipe which is 15-20 cm or 30-35 cm and is matched with the caliber of a drain hole in the bottom of the pool is selected, the polyethylene plastic pipe is inserted into the drain hole, and the low-salinity seawater in the upper layer of the seedling raising pool is drained timely. Meanwhile, a water injection valve is opened, pre-stored seawater with salinity of 30-33 per mill is quickly injected, the discharge of low-salinity seawater is accelerated, and the salinity of upper-layer seawater in the seedling culture pond is improved. When the vertical height of the seawater in the seedling raising pond is reduced to 15-20 cm or 30-35 cm, a polyethylene plastic pipe with the length of more than or equal to 50-55 cm or 65-70 cm is selected to be inserted into the drain hole, and the water level of the seedling raising pond is increased until the seawater on the surface layer flows out through the upper opening of the polyethylene plastic pipe; a water injection valve is modulated to be in a slow water injection state;
f. the salinity of the seawater on the upper layer of the seedling raising pond is 9-0 ‰
When the salinity of the seawater below 15-20 cm or 25-35 cm in the bottom layer of the vertical seedling raising pool is 9-0 per mill, taking out the seedling attaching curtain in the seedling raising pool, temporarily placing the seedling attaching curtain in a seawater pool with the salinity of 30-33 per mill, simultaneously opening the drain hole, completely discharging the low-salinity seawater in the seedling raising pool, re-injecting the seawater with the salinity of 30-33 per mill with the height of 50-55 cm or 65-70 cm, and then hanging the seedling attaching curtain in the seedling raising pool again; a water injection valve is modulated to be in a slow water injection state;
6) and (3) seawater replacement in the seedling raising pond after acute rainfall: after acute rainfall, the salinity of the seawater is monitored, when the salinity is changed to 30-33 per mill by natural tide, the natural seawater is extracted, filtered and settled, and then the seawater in the seedling culture pond is completely replaced.
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| CN103960180A (en) * | 2014-04-16 | 2014-08-06 | 福建省水产研究所 | Short-necked clam large-area reclamation area larva breeding and sea area larva intermediate breeding method |
| CN105104164A (en) * | 2015-08-20 | 2015-12-02 | 温州大学 | Quality breeding method for sargassum fusiforme |
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| CN103960180A (en) * | 2014-04-16 | 2014-08-06 | 福建省水产研究所 | Short-necked clam large-area reclamation area larva breeding and sea area larva intermediate breeding method |
| CN105104164A (en) * | 2015-08-20 | 2015-12-02 | 温州大学 | Quality breeding method for sargassum fusiforme |
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