CN112042570B - A method for cultivating and domesticating high-efficiency California perch seedlings in a pond greenhouse - Google Patents

Abstract

The invention discloses a method for cultivating and domesticating high-efficiency California perch seedlings in a greenhouse in a pond, comprising the following steps: constructing a cultivating pond, stocking the water-flowering seeds, and three-stage cultivation and domestication. The method for cultivating and domesticating high-efficiency California perch seedlings in a warm pond in a pond of the present invention controls the conditions for stocking the water flower seedlings, uses a bait feeding device to artificially cultivate a constant temperature living biological bait, and uses the bait feeding device to divide the bait feeding device after the water flower seedlings are stocked. Cultivation and domestication of water flower seedlings are carried out step by step and step by step, and different bait is fed to the water flower seedlings at different stages of cultivation and domestication. The cultivated perch seedlings are healthy and uniform in size. More than 60%, providing large-scale and high-quality seed guarantee for small-scale retail farming of largemouth bass, which has great practical application and production value.

Description

A method for cultivating and domesticating high-efficiency California perch seedlings in a pond greenhouse

technical field

The invention relates to the technical field of freshwater aquaculture, in particular, the invention relates to a method for cultivating and domesticating high-efficiency California perch seedlings in a greenhouse in a pond.

Background technique

California perch, scientific name largemouth bass, native to North America, has the advantages of strong adaptability, fast growth, easy to catch, good transportation, short breeding cycle, etc. In addition, the meat is delicious and tender, without intermuscular thorns, beautiful in appearance, and is deeply cultivated. It has become an important high-quality freshwater aquaculture species in China. After more than 30 years of development, my country has become the country with the largest production of largemouth bass in the world.

In 2014, the whole-process feed farming of California sea bass was successful, and since then, it has gradually got rid of the shackles of chilled fish, and the California sea bass industry has begun to have more space and possibilities. In the past two years, due to its relatively good breeding benefits, California perch farming has been in full swing, blooming all over the country, and it has exploded every year in Guangdong, Zhejiang, Jiangsu, Sichuan and other places. One of the hot varieties.

The fry cultivation refers to the production process of raising the water flowers of the perch in the lower pond for about 40-50 days, and developing large-sized summer flower fingerlings with a body length of more than 4cm. Due to their delicate body, weak feeding ability, and poor ability to adapt to the environment, fry cultivation and domestication is the first key link in California perch breeding. However, the cultivation of water flower seedlings is generally carried out in March-April, especially in Huzhou, Zhejiang. During this time period, the temperature is changeable, the temperature difference between day and night is large, and it is hot and cold, which can easily cause the water flower seedlings to die of stress, and even the whole pond has no symptoms. seedling phenomenon. In addition, the water temperature during this time period was relatively low, and plankton suitable for the opening of water sprouts were not easy to multiply in large numbers, and the artificial feeding of commercial opening bait such as frozen Artemia nauplii was unevenly sprinkled, resulting in some perch fry unable to consume the bait required for normal growth. Or, cannibalism often occurs when the bait is insufficient. At the same time, due to the low temperature of frozen Artemia, the perch water flower seedlings are prone to stress after ingestion, enteritis, defecation, cooking and death, which seriously affects the domestication and survival of perch water flower. rate and aquaculture production.

The Chinese patent (CN108901950B) discloses a method for cultivating industrialized perch fry. The domestication of perch fry is carried out by constructing a factory cement pond indoors. This method requires cement hardening and heating of the water body, and the cost is relatively high. It is not suitable for large-scale retail households to cultivate perch water flower seedlings, and due to the large differences in environment, temperature and other factors, its domestication method is not suitable for wild breeding ponds.

SUMMARY OF THE INVENTION

Aiming at this series of problems in production, after more than 2 years of continuous exploration, the present invention effectively improves the cultivation and domestication of water flower seeds by building a simple greenhouse in a pond and designing a bait feeding device to cultivate and domesticate water flower seeds. The survival rate and domestication success rate provide large-scale and high-quality seed guarantee for largemouth bass breeding. In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for cultivating and domesticating high-efficiency California perch seedlings in a pond greenhouse.

In order to solve the above problems, the present invention adopts the following technical solutions:

A method for cultivating and domesticating high-efficiency California perch seedlings in a greenhouse in a pond, comprising the following steps:

(1) Construction of aquaculture ponds;

(2) Stocking water flower seedlings: stocking water flower seedlings in the culturing pond, the stocking density is 100,000 to 150,000/mu, and the water temperature difference between the original water temperature of the water flower seedlings and the water temperature in the cultivating pond during stocking is not more than 1 °C;

(3) Breeding and domestication: including the first stage, the second stage and the third stage;

The first stage is the stage when the body length of the water flower seed is less than 2cm, and in this stage, the artificially cultivated constant temperature living biological bait is fed to the water flower seed;

The second stage is that the water flower seedlings have a body length of 2.0-2.2 cm. In this stage, the water flower seedlings are gradually fed with different bait, so that the water flower seedlings are gradually adapted to the feeding bait. The constant temperature living biological bait is transformed into a California perch on the market. Artificial bait for spray;

In the third stage, the water flower seedlings are fed with special water flower artificial bait until the seedlings grow to a body length of more than 4 cm.

Preferably, the constant temperature living biological bait is a mixture of planktonic algae and zooplankton, and the density of fleas in the constant temperature living biological bait reaches more than 3000 per liter.

Preferably, the feeding of the constant temperature living biological bait is carried out in a bait feeding device, and the bait feeding device includes:

The feeding box is provided with a first fill light, a first heating temperature control element and a water distribution pipe, the first fill light is located above the liquid in the feeding box; the first heating temperature control element is arranged on the The inside of the feeding box is used to heat the liquid in the feeding box and keep the liquid temperature constant; the water distribution pipe is a blind pipe with one end closed, and the water distribution pipe is arranged inside the feeding box, along the length of the water distribution pipe A plurality of first water outlet nozzles are arranged on the water distribution pipe; the constant temperature living biological bait is installed in the feeding box;

an incubator, which is provided with a second supplementary light, a second heating and temperature control element and an oxygenation device, the second supplementary light is located above the liquid in the incubator; the second heating and temperature control element is used for heating the liquid in the incubator and maintaining a constant temperature of the liquid; the incubator is communicated with the feeding box through a feeding pipe; the incubator is used for culturing the constant temperature living biological bait;

A discharge nozzle, one end of which is communicated with the feeding box through a discharge pipe, a plurality of discharge nozzles are arranged on the discharge nozzle, and a first switch valve is arranged on the discharge pipe;

a water pump, the water inlet of which is communicated with the pond culture water through the water inlet pipe, and the water outlet is communicated with one end of the feeding pipe of the feeding box, and the feeding pipe is provided with a second switch valve; The open end is communicated with the other end of the feed pipe;

Water filling nozzle, the water outlet of the water pump is communicated with the first interface of the three-way connecting pipe, the second interface of the three-way connecting pipe is communicated with one end of the feeding pipe of the feeding box, and the The third interface of the three-way connecting pipe is communicated with the water-filling pipe of the water-filling nozzle, the water-filling pipe is provided with a third switch valve, and the water-filling nozzle is provided with a plurality of second water outlet nozzles.

Preferably, the feeding of the second stage is carried out according to the following process:

On the first day of domestication, the ratio of dead bait and live biological bait was 1:1;

On the second day of domestication, the ratio of dead bait and live biological bait was 2:1;

On the third day of domestication, all of them were fed with death bait;

On the fourth day of domestication, the ratio of dead bait and artificial bait was 3:1;

On the fifth day of domestication, the ratio of dead bait and artificial bait was 2:1;

On the sixth day of domestication, the ratio of dead bait and artificial bait was 1:1;

On the seventh day of domestication, the ratio of dead bait and artificial bait was 1:2;

On the eighth day of acclimation, all artificial bait was fed. When the sprouts flocked quickly on the feeding table and had a strong ability to grab food, the acclimation was successful.

Preferably, the constant temperature living biological bait further contains astragalus polysaccharide.

Preferably, in the second stage, the Chinese herbal medicine for building intestines and protecting the liver is also fed to the seedlings of the water flower, and the Chinese herbal medicines for building the intestines and protecting the liver and vitamins are also fed to the seedlings of the water flower in the third stage.

Preferably, in the first stage and the second stage, fixed-point feeding is performed twice a day, with a feeding interval of 12 hours, and each feeding is 20-30 minutes.

Preferably, in the third stage, fixed-point feeding is performed 4 to 5 times a day, the feeding interval is 5 to 6 hours, and each feeding is 20 to 30 minutes.

Preferably, anti-stress drugs are sprinkled into the culturing pond before the stocking of the water flower seedlings, and the time when the water flower seedlings are stocked in the aquaculture pond is selected as 9:00-10:00 am on a sunny day.

Preferably, the pH of the water body in the culturing pond is 7.5-8.5, the dissolved oxygen is 5-9 mg/L, and the transparency is 20-25 cm.

Compared with the prior art, the technical effect of the present invention is embodied in:

The method for cultivating and domesticating high-efficiency California perch seedlings in a warm pond in a pond of the present invention controls the conditions for stocking the water flowers, uses a bait feeding device to artificially cultivate a constant temperature living biological bait, and uses a bait feeding device to divide the water flowers after stocking the water flowers. Cultivate and domesticate the water flower seedlings in stages and step by step, and feed the water flower seedlings with different bait at different stages of cultivation and domestication. The cultivated perch seedlings are healthy and uniform in size. More than 60%, providing large-scale and high-quality seed guarantee for small-scale retail farming of largemouth bass, which has great practical application and production value.

Description of drawings

FIG. 1 is a schematic structural diagram of a bait feeding device according to an embodiment of the present invention.

In the figure, 1. Feeding box, 2. Discharging nozzle, 3. Discharging pipe, 4. First on-off valve, 5. Water pump, 6. Water inlet pipe, 7. Feeding pipe, 8. Second on-off valve, 9 , water distribution pipe, 10, first heating and temperature control element, 11, water filling nozzle, 12, three-way connecting pipe, 13, water filling pipe, 14, third switch valve, 15, filter screen, 16, first fill light , 17, incubator, 18, second heating and temperature control element, 19, oxygenation device, 20, feeding pipe, 21, fourth switch valve, 22, second fill light, 201, discharge nozzle, 901 , The first water outlet nozzle, 1101, the second water outlet nozzle, 1201, the first interface, 1202, the second interface, 1203, the third interface.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The embodiment of the present invention provides a method for cultivating and domesticating high-efficiency California perch seedlings in a pond greenhouse, comprising the following steps:

(1) Construction of aquaculture ponds;

(2) Stocking water flower seedlings: stocking water flower seedlings in aquaculture ponds, the stocking density is 100,000 to 150,000/mu, and the temperature difference between the original water temperature of the water flower seedlings and the water temperature of the aquaculture pond during stocking is not more than 1°C;

(3) Breeding and domestication: including the first stage, the second stage and the third stage;

The first stage is the stage when the body length of the water flower seedlings is less than 2cm. In this stage, the artificially cultivated constant temperature living biological bait is fed to the water flower seedlings;

The second stage is when the water flower seedlings are 2.0~2.2cm in length. During this stage, the water flower seedlings are gradually fed with different bait, so that the water flower seedlings are gradually adapted to the feeding bait. The constant temperature living biological bait is changed to a special type of perch water spray on the market. Artificial bait; in the third stage, feed the water flower seedlings with artificial bait special for perch water flower until the seedlings grow to a body length of more than 4cm.

Wherein, step (1) constructing a culture pond includes the following processes:

(11) Choose a suitable fry pond: the area of the fry pond is 2000-4000m ² and the water depth is preferably 0.8-1.0m. It should not be too deep to prevent a large temperature difference between the upper and lower layers of the water body. The slope ratio is about 1:2.5, which is convenient for the construction of the greenhouse. It is required that the fry pond has sufficient water source, good water quality, convenient injection and drainage, flat bottom, appropriate amount of sediment, and firm embankment without leakage.

(12) Clearing ponds with medicines: Use medicines to kill wild fish, harmful organisms, fish pathogens and parasites. Clearing the pond with medicine is an important measure to improve water quality, soil quality and increase the survival rate of fry. It is generally carried out 10 to 15 days before the fry are placed in the pond. ^The commonly used drug is quicklime, generally about 80~100kg/667m2 of quicklime. When applying, first drain the pool water to a depth of 5-10cm, and directly spread the quicklime evenly over the whole pool. On the second day of clearing the pond, use a rake to move the bottom mud of the pond once again, so that the quicklime and the bottom mud are fully mixed to achieve the effect of thorough disinfection.

(13) Building a greenhouse: The fish fry pond is built with steel bars or bamboo poles to build a greenhouse frame, and the outside is completely covered with plastic film, and reinforcement measures are taken. In the greenhouse, a bottom aeration aeration plate with a diameter of ²⁰ ~30m2 is placed every 200m2, and the bottom aeration facility is ²⁰ ~30cm away from the bottom of the pool. When the daytime temperature is above 15 ℃, open the ventilation at both ends of the greenhouse after 10 am to allow air circulation, and then close the ventilation at around 4 pm. When the minimum temperature at night is above 12°C, the greenhouse should be opened for ventilation to maintain air circulation. During the day, the number of aeration discs should be determined according to the dissolved oxygen situation of the water body, and all of them should be opened at night to ensure sufficient dissolved oxygen, generally 5~9mg/L of dissolved oxygen.

(14) Water injection and fertilization: 6 to 10 days after clearing the pond or 5 to 7 days before the seedlings are released. Premature water injection will easily produce predatory organisms such as aquatic insects, which will affect the survival of fry. The water should be less at the beginning. Generally, the water depth is 50-60cm, which is good for the temperature of the aquaculture water. As the fish grow up, add water gradually. The water in the fry pond should be filtered through a 60-80 mesh mesh to prevent wild fish, Fish eggs, frog eggs, harmful insects, etc. enter the pond. At the same time, 200 kg/mu of fermented organic manure is applied to the fry pond 5-7 days before the fry are put into the pond. Because about 5 to 7 days after fertilization is the peak period for the emergence of larvae bait, the quantity and type of fertilizer and aquatic products should be adjusted according to local conditions. In order to speed up the fertilizer and water, chemical fertilizers can also be applied, generally 3-4 kg/mu of urea and 2-3 kg/mu of superphosphate.

After the aquaculture pond is constructed, the water flower seedlings will be stocked into the aquaculture pond. The stocking density should not be too large, and it is recommended to be 100,000 to 150,000 animals/mu. The water should be tested before stocking. The method is to put 30~50 water flower seedlings into a simple net bag in the pond and observe for 24 hours. If the fry activity is normal, it means that the water body is non-toxic and can be continued to be stocked. One day before stocking, the whole pond should be sprinkled with anti-stress drugs. The specific time for planting the water flowers in the pond is preferably between 9:00 and 10:00 in the morning on a sunny day. At this time, the dissolved oxygen in the water has increased and the temperature change is small. When entering the pond, the difference between the water temperature of the container where the fry was originally located and the water temperature of the aquaculture pond should not exceed 1 °C. When entering the pool, the bucket (basin) containing the fry should be attached to the water surface of the pool, and the fish bucket should be tilted slowly to make the water in the bucket mix with the pool water, and let the water slowly swim into the pool.

In step (3), the constant temperature living biological bait is fed in a bait feeding device. The structure of the bait feeding device is shown in Figure 1, including: a feeding box 1, an incubator 17, a discharge nozzle 2, and a water filling nozzle 11. and water pump 5; the feeding box 1 is provided with a first fill light 16, a first heating temperature control element 10 and a water distribution pipe 9, and the first fill light 16 is located above the liquid in the feeding box 1; the first heating temperature control element 10 is provided with Inside the feeding box 1, it is used to heat the liquid in the feeding box 1 and keep the liquid temperature constant; the water distribution pipe 9 is a blind pipe with one end closed, and the water distribution pipe 9 is arranged inside the feeding box 1. The water distribution pipe 9 is provided with a plurality of first water outlet nozzles 901; the feeding box 1 contains the cultured constant temperature living biological bait. The incubator 17 is provided with a second supplementary light 22, a second heating temperature control element 18 and an oxygenation device 19. The second supplementary light 22 is located above the liquid in the incubator 17; the second heating temperature control element 18 is used for The liquid in the incubator 17 is heated and the temperature of the liquid is kept constant; the incubator 17 is communicated with the feeding box 1 through the feeding pipe 20, and the feeding pipe 20 is provided with a fourth switch valve 21; . One end of the discharge nozzle 2 is communicated with the feeding box 1 through a discharge pipe 3 . The discharge nozzle 2 is provided with a plurality of discharge nozzle holes 201 , and the discharge pipe 3 is provided with a first switch valve 4 . The water inlet of the water pump 5 is communicated with the pond culture water through the water inlet pipe 6, the inlet of the water inlet pipe 6 is provided with a filter screen 15, and the water outlet of the water pump 5 is communicated with one end of the feeding pipe 7 of the feeding box 1, and the feeding pipe 7 is provided with a second switch valve 8; the open end of the water distribution pipe 9 is communicated with the other end of the feed pipe 7; the water outlet of the water pump 5 is communicated with the first interface 1201 of the tee connection pipe 12, and the tee connection pipe The second interface 1202 of 12 is communicated with one end of the feeding pipe 7 of the feeding box 1, and the third interface 1203 of the three-way connecting pipe 12 is communicated with the water filling pipe 13 of the water filling nozzle 11. The water filling pipe 13 is provided with a third The valve 14 is turned on and off, and the water filling nozzle 11 is provided with a plurality of second water outlet nozzles 1101 . The volume of the incubator 17 and the feeding box 1 is designed to be 288L, the length of the first supplementary light 16 and the second supplementary light 22 is 80cm, and the power is 20W. When in use, the bait feeding device is installed 3 to 5 meters away from the shore of the pond to facilitate installation and management. One feeding box 1 is placed every 2000 m ² , and two incubators 17 are installed.

The constant-temperature living biological bait culture solution fed is cultivated according to the following process: 5 days before the seedlings are released, the pond water body with just fertilizer water is pumped into the incubator 17 by the variable frequency pump 5, and the volume of the water body accounts for about 80% of the volume of the incubator 17. . Then, copepods and cladocerans such as rotifers and large fleas are put into the incubator 17 to ensure that the density of fleas is more than 100 per liter. Then put planktonic algae, such as the common concentrated solution of Chlorella pyrenoidosa on the market, and add culture nutrients, and use the second heating temperature control element 18 to control the water temperature in the incubator 17 at 26°C, which is the temperature of the pellets. The optimum temperature for breeding and growth of algae and zooplankton, and the oxygenation device 19 at the bottom of the incubator 17 is opened, and the water body in the incubator 17 can be agitated at the same time as the oxygen is increased, which is conducive to the rapid growth and reproduction of algae, and is conducive to the rapid growth and reproduction of zooplankton. Cultivate enough food. The second supplementary light 22 is used to supplement the light in the incubator 17 on rainy and sunny nights, so as to increase the photosynthesis time and promote the rapid proliferation of algae. Generally, after 5-6 days of cultivation, the color of the water body can reach dark green, and the density of fleas can reach more than 3,000 per liter, which meets the requirements of water flower seedling cultivation.

At the same time, the first heating and temperature control element 10 is used to control the temperature of the living biological bait fed in the feeding box 1 to be stable at 26°C, which is not only conducive to the survival and reproduction of the living biological bait, but also can be avoided by constant temperature feeding. The stress response is more conducive to the growth of water flower seedlings.

The first stage of feeding is about 30 days after the California perch seedlings are planted in the pond. At this stage, the water flower seedlings are less than 2cm in length, and they are fed twice a day at 5-6 o'clock in the morning and 5-6 o'clock in the evening. , feeding the cultured constant temperature living biological bait. The feeding interval is 12h, and each feeding is 20~30min. Before feeding the constant temperature living biological bait, first turn off the second switch valve 8 at the water inlet and the first switch valve 4 of the discharge nozzle 2, open the third switch valve 14 of the water filling nozzle 11, and turn on the variable frequency water pump 5. Under certain water flow, because the California perch is born with the habit of countercurrent top water, a large number of water flower seedlings will gather near the water filling nozzle 11, which is conducive to inducing the fish fry to come and feed. After the water-filling nozzle 11 is filled with water for 5-10 minutes, open the second switch valve 8 and the first switch valve 4 in turn, adjust the valves, and control the flow, so that the feeding time is preferably controlled within 20-30 minutes. Generally, when the first switch valve 4 at the 2 end of the discharge nozzle is adjusted to the maximum, its flow rate is 20L per minute, then the water inlet flow rate of the feeding box 1 is controlled at 14L, and the flow rate of the water filling nozzle 11 should be 3 times that of the discharge nozzle 2. times, that is, 60L per minute. After 20~30 minutes of feeding, 120L~180L of biological bait culture solution is fed, which is equivalent to feeding about 40%~60% of constant temperature living biological bait, and then the two incubators 17 are cultured. After the liquid is mixed, each pump 60L~90L into the feeding box 1 to restore the water level of the biological bait to its original position, and then use the water pump 5 to pump into the pond water body to restore the water level of the incubator 17 to the original position, and carry out the rapid cultivation of algae-flea. . The discharge direction of the first discharge nozzle 201 of the discharge nozzle 2 is parallel to the water surface, and the water discharge direction of the second water nozzle hole 1101 of the water filling nozzle 11 forms an angle of 30°~40° with the water surface. The zooplankton sprayed by the nozzle 2 can spread well, which is beneficial to the feeding of the water flower seedlings.

In addition, in order to increase the adaptability and anti-stress ability of the fry to the environment, aquatic medicines such as astragalus polysaccharide should be added to the biological bait incubator at this stage, so that the live biological bait after feeding contains astragalus polysaccharide .

When the sprouts are about 2cm in length, generally between 1.8 and 2.2cm, the domestication of the California perch can be carried out, neither too early nor too late. The feeding of the second stage is carried out according to the following process: on the first day of domestication, during the two feedings, part of the zooplankton in the biological bait incubator 17 is fished out with a 100-mesh mesh net, and after they die, together with the living biological bait at a constant temperature The California perch is fed through the discharge nozzle 2, and the ratio of the dead bait and the constant temperature living biological bait is 1:1; in the second day of domestication, the ratio of the dead bait and the constant temperature living biological bait is 2:1; in the third day of domestication, all feed Feed the dead bait; on the fourth day of acclimation, the ratio of dead bait:artificial bait is 3:1 and mixed and fed; on the fifth day of domestication, the ratio of dead bait:artificial bait is 2:1 and mixed and fed; on the sixth day of acclimation On the seventh day of acclimation, the ratio of dead bait:artificial bait was 1:2; on the eighth day, all artificial bait was used for feeding. The domestication is successful when the perch fry gather quickly on the feeding table and have a strong ability to grab food. At this time, due to the unsuitable diet change, the perch fry are prone to enteritis. At this stage, drugs that build intestines and protect the liver should be added to enhance the gastrointestinal function of the perch fry and prevent the occurrence of enteritis.

After the domestication is successful, it will enter the third stage of feeding. Artificial bait is fed 4 to 5 times a day at fixed points. The feeding interval is 5 to 6 hours, and each feeding is 20 to 30 minutes. It is better to have fewer fish groups, and the feed is mixed with intestines and liver protection, and vitamins are appropriately supplemented to make the California sea bass nutritionally complete and enhance resistance. Add the material once every 3 to 4 days, and each addition does not exceed 10%. After about 20 days of cultivation, summer flowers with an adult length of 4cm and above can be cultivated.

In the process of breeding and domestication of California perch seedlings, it is also necessary to strengthen the water quality management of aquaculture ponds, use water quality improvers in a timely manner, maintain long-term stability of water quality, and ensure the transparency of 20~25cm, ensure the diversification of algae in the water body, and maintain a small amount of zooplankton for a long time. Regularly use detoxification and water-stabilizing products to maintain the balance of algal and bacterial phases, prevent and control the water quality from dark green, and avoid bubble disease caused by high pH value. The management of stress runs through the whole process of breeding and domestication. As follows, the water temperature and pH value of the water body should be balanced when the water is blooming; the anti-stress drugs such as immune polysaccharides or vitamin C should be sprinkled before and after the sudden change of weather or during the feeding period to improve the vitality of the fry, etc. . Control the pH of the culture pond water to 7.5~8.5 and the dissolved oxygen to 5~9mg/L.

In addition, the management of Xuntang should also be strengthened, generally three times a day in the morning, noon and evening. The main purpose of Xuntang is to observe the water quality and fertility to determine the time and quantity of feeding, fertilization, and water injection; at the same time, observe the activity and growth of fry, and if any abnormality is found in fry, stop feeding or reduce feeding, and give priority to oxygenation and detoxification, such as If the floating head is found, take oxygen-enhancing measures such as flushing water in time, and prevent and remove the diseased fish in time when the disease is found; according to the size of the fish, the time to pull the net out of the pool is determined. Make daily management records in combination with Xuntang. It is recommended to feed artificial bait for one meal in the evening and stop feeding until about 5:30 to avoid excessive feeding, which may cause fry "overeating" and indigestion.

The method for cultivating and domesticating high-efficiency California perch seedlings in a warm pond in a pond of the present invention controls the conditions for stocking the water flowers, uses a bait feeding device to artificially cultivate a constant temperature living biological bait, and uses a bait feeding device to divide the water flowers after stocking the water flowers. Cultivate and domesticate the water flower seedlings in stages and step by step, and feed the water flower seedlings with different bait at different stages of cultivation and domestication. The cultivated perch seedlings are healthy and uniform in size. More than 60%, providing large-scale and high-quality seed guarantee for small-scale retail farming of largemouth bass, which has great practical application and production value.

The present invention is not limited to the above-mentioned specific embodiments, and various modifications and variations of the present invention are possible. Any modification, equivalent replacement, improvement, etc. made to the above embodiments according to the technical essence of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. A method for cultivating and domesticating efficient micropterus salmoides water bloom seedlings in a pond greenhouse is characterized by comprising the following steps:

(1) constructing a culture pond;

(2) stocking the water bloom seedlings: stocking the water bloom seedlings into the culture pond, wherein the stocking density is 10-15 ten thousand seeds/mu, and the temperature difference between the original culture water temperature of the water bloom seedlings and the water temperature of the culture pond during stocking is not more than 1 ℃;

(3) cultivating and domesticating: comprises a first stage, a second stage and a third stage;

the first stage is a stage that the length of the seedling of the water bloom is less than 2cm, and in the first stage, the water bloom is fed with artificially cultured constant-temperature living biological bait; the constant-temperature living organism bait is a mixture of planktonic algae and zooplankton, and the density of daphnia in the constant-temperature living organism bait reaches more than 3000 per liter;

the second stage is that the body length of the water bloom seedlings is 2.0-2.2 cm, different baits are gradually fed to the water bloom seedlings in the second stage, so that the water bloom seedlings gradually adapt to the fed baits, and the constant-temperature living biological baits are changed into the special artificial baits for the water bloom of the weever in the market;

in the third stage, feeding special artificial bait to the water supply flower seedling until the seedling grows to be more than 4cm in body length;

the feeding of constant temperature live body biological bait goes on in the bait is thrown and is raised the device, the bait is thrown and is raised the device and includes:

the feeding box is internally provided with a first light supplement lamp, a first heating temperature control element and a water distribution pipe, and the first light supplement lamp is positioned above liquid in the feeding box; the first heating temperature control element is arranged in the feeding box and used for heating the liquid in the feeding box and maintaining the temperature of the liquid to be constant; the water distribution pipe is a blind pipe with one closed end, is arranged in the charging box and is provided with a plurality of first water outlet spray holes along the length direction of the water distribution pipe; the constant-temperature living biological bait is filled in the feeding box;

the incubator is internally provided with a second light supplement lamp, a second heating temperature control element and an oxygenation device, and the second light supplement lamp is positioned above liquid in the incubator; the second heating temperature control element is used for heating the liquid in the incubator and maintaining the temperature of the liquid constant; the incubator is communicated with the feeding box through a conveying pipe; the incubator is used for culturing the constant-temperature living biological bait;

one end of the discharging spray head is communicated with the feeding box through a discharging pipe, a plurality of discharging spray holes are formed in the discharging spray head, and a first switch valve is arranged on the discharging pipe;

the water inlet of the water pump is communicated with the pond culture water through a water inlet pipe, the water outlet of the water pump is communicated with one end of a feeding pipe of the feeding box, and a second switch valve is arranged on the feeding pipe; the open end of the water distribution pipe is communicated with the other end of the feed pipe;

the water outlet of the water pump is communicated with a first interface of a three-way connecting pipe, a second interface of the three-way connecting pipe is communicated with one end of the feeding pipe of the feeding box, a third interface of the three-way connecting pipe is communicated with a water filling pipe of the water filling spray head, a third switch valve is arranged on the water filling pipe, and a plurality of second water outlet spray holes are formed in the water filling spray head;

before feeding the constant-temperature living organism bait, the second switch valve at the water inlet and the first switch valve at the discharging nozzle are turned off, the third switch valve of the water filling nozzle is turned on, the water pump is turned on, and after the water filling nozzle fills water for 5-10 minutes, the second switch valve and the first switch valve are sequentially turned on to control the flow rate, so that the feeding time is controlled within 20-30 minutes.

2. The method for cultivating and domesticating the lateolabrax salmoides fry in the pond greenhouse of claim 1, wherein the feeding in the second stage is carried out according to the following processes:

domesticating for the first day, and feeding death bait and the constant-temperature living organism bait in a ratio of 1: 1;

domesticating for the second day, and feeding death bait and the constant-temperature living organism bait in a ratio of 2: 1;

domesticating for the third day, and feeding dead baits;

feeding death bait and artificial bait in the ratio of 3 to 1 on the acclimation fourth day;

feeding death bait and artificial bait in a ratio of 2:1 on the fifth acclimation day;

feeding death bait and artificial bait in the ratio of 1 to 1 on the sixth acclimation day;

feeding death bait and artificial bait in the ratio of 1 to 2 on the seventh acclimation day;

and on the eighth acclimation day, feeding all the special artificial baits, and when the water bloom seedlings gather together swiftly on a feeding table and have strong food snatching capability, successfully acclimating.

3. The method for cultivating and domesticating lateolabrax japonicus fry in a pond greenhouse as claimed in claim 1 or 2, wherein the constant temperature living biological bait also contains astragalus polysaccharides.

4. The method for cultivating and domesticating the water blossoms of the pond greenhouse high-efficiency micropterus salmoides as claimed in claim 3, wherein the water blossoms are also fed with intestine-strengthening and liver-protecting medicines in the second stage; and in the third stage, medicines and vitamins for strengthening intestines and protecting liver are fed to the water bloom seedlings.

5. The method for cultivating and domesticating lateolabrax japonicas fry in a pond greenhouse as claimed in claim 4, wherein in the first stage and the second stage, feeding is performed twice at fixed points every day, the feeding interval is 12h, and each feeding is 20-30 min.

6. The method for cultivating and domesticating lateolabrax japonicas fry in a pond greenhouse in a high-efficiency manner according to claim 5, wherein in the third stage, feeding is performed for 4-5 times at fixed points every day, the feeding interval is 5-6 hours, and each feeding is performed for 20-30 min.

7. The method for cultivating and domesticating the high-efficiency micropterus salmoides fry in the greenhouse of the pond as claimed in claim 1, wherein anti-stress drugs are sprinkled into the cultivation pond before the fry are released, and the time for releasing the fry into the cultivation pond is selected from the time of 9: 00-10: 00 at am on sunny days.

8. The method for cultivating and domesticating lateolabrax japonicas fry in a pond greenhouse in a high-efficiency manner as claimed in claim 1, wherein the pH value of the water body of the aquaculture pond is 7.5-8.5, the dissolved oxygen content is 5-9 mg/L, and the transparency is 20-25 cm.

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