CN110663606A - Australia freshwater lobster paddy field breeding method - Google Patents
Australia freshwater lobster paddy field breeding method Download PDFInfo
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- CN110663606A CN110663606A CN201910969789.4A CN201910969789A CN110663606A CN 110663606 A CN110663606 A CN 110663606A CN 201910969789 A CN201910969789 A CN 201910969789A CN 110663606 A CN110663606 A CN 110663606A
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
- A01K61/13—Prevention or treatment of fish diseases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/60—Fishing; Aquaculture; Aquafarming
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Botany (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The embodiment of the invention discloses a paddy field culture method for Australia crayfish, which comprises the following steps: selecting a paddy field with 10-50 mu of sunlight irradiation sufficient, arranging ring ditches on the peripheral sides of the paddy field, wherein the area of the ring ditches is less than 10% of the area of the paddy field; uniformly planting submerged plants in the circular ditches 15 days before the Australia crayfish seedlings are put into the breeding field; after the Australian crayfish test water is disinfected, uniformly breeding the Australian crayfish in the circular ditch, feeding the young prawns twice a day, adjusting the water level in the circular ditch in the breeding process so that the Australian crayfish can enter the rice field to find food, and simultaneously, regularly adding quicklime into the water; after more than 3 months of culture, the Australian lobster which reaches the capture specification is captured. The embodiment of the invention utilizes the paddy field water body to culture the Australia crayfish, and can exert the effects of weeding, excrement fattening and the like of the Australia crayfish. The method realizes the symbiosis of rice and shrimps, and has the effects of planting rice on field surface, breeding Australia freshwater lobster in water body, fertilizing shrimp manure in field and symbiosis of rice and shrimps.
Description
Technical Field
The embodiment of the invention relates to the technical field of aquaculture, and particularly relates to a paddy field culture method for Australia crayfish.
Background
Australian crayfish is commonly known as crayfish, red crayfish or crayfish, the English name Redclad crayfish, the academic name Cherax aquarectinatus, and is classified as the order Decapoda, the family Procambrudae (Parascidae), and the genus red crayfish (Cherax). The freshwater lobster is originally produced in a stream in a tropical area in northern Australia, is similar to the lobsters in the sea in appearance, and has the body color of brilliant blue, cyan or iron cyan. The adaptability is strong, the growth temperature is 6-35 ℃, the Australia freshwater lobster body is large and fat, the weight of the grown shrimps in the market is 200 grams per shrimp, the shrimps can be eaten when the shrimps grow to about 75 grams, and the shrimps can grow to about 1 kilogram at most. It has rich nutrition, tender meat, crisp and smooth texture, and delicious and sweet taste. The Australia crayfish is very favorable for anhydrous transportation and has extremely strong vitality resistance, and the fresh and alive crayfish is favored in domestic and foreign markets. The traditional culture method has the defects of high cost, environmental pollution and low culture efficiency, and needs to be further improved.
Disclosure of Invention
Therefore, the embodiment of the invention provides a paddy field culture method for Australia crayfish, and aims to solve the problem that the Australia crayfish culture efficiency is low in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the Australia crayfish paddy field breeding method is characterized by comprising the following steps:
selecting a paddy field with 10-50 mu of sunlight irradiation sufficient, arranging ring ditches on the peripheral sides of the paddy field, or arranging field ditches in the paddy field, wherein the area of the ring ditches is not more than 10% of the area of the paddy field;
uniformly planting submerged plants in the circular ditches 15 days before the Australia freshwater lobster seedlings are put in the breeding field;
after the Australia crayfish test water is disinfected, uniformly breeding the Australia crayfish in the circular ditch, feeding the Australia crayfish seedlings twice a day, adjusting the water level in the circular ditch in the breeding process to ensure that the Australia crayfish can enter the rice field to find food, and simultaneously, regularly adding quicklime into the water;
after more than 3 months of culture, the Australian lobster which reaches the capture specification is captured.
Preferably, the distance between the circular ditch and the edge of the rice field is 1.5-2m, the width of the upper opening of the circular ditch is 3-4m, the width of the lower opening of the circular ditch is 0.8-1.2m, and the depth of the circular ditch is 1.0-1.5 m.
Preferably, the submerged plant is hydrilla verticillata, watermifoil, waterweed, hornwort, curly pondweed or water peanut;
the submerged plants are uniformly distributed in the annular ditch, and the planting area of the submerged plants is 30-50% of the culture water surface.
Preferably, the depth of the water level in the annular groove is 1.0-1.5 m.
Preferably, when the Australia crayfish is put in the test water for breeding, the survival rate of the test water reaches 95-100%, the Australia crayfish fries are put in the test water, 1000 plus 2000 Australia crayfish fries can be put in each mu of rice field, the body length of the Australia crayfish fries is 3-5cm, and the temperature difference is less than 3 ℃ when the crayfish fries are put in the breeding;
before breeding the Australia crayfish, soaking the Australia crayfish in 5% salt solution for 5-10min or 5ppm potassium permanganate for 10-20 min.
Preferably, in the feeding process, 20% -30% of the total daily bait amount is thrown in the morning every day, 70% -80% of the total daily bait amount is thrown in the evening every day, and the crude protein content of the thrown bait is 36-44%.
Preferably, drugs such as photosynthetic bacteria and various vitamins are added into the bait to enhance the physique of the Australian crayfish and reduce the occurrence of diseases.
Preferably, the stocking time of the Australian dragon freshwater lobster is 5-6 months per year, water is changed once in 7-10 days, and the water changing depth is 8-10 cm;
in the high-temperature season of 7-8 months per year, water is changed for 1-2 times every week, and the water changing depth is 10-15cm each time;
after 9 months each year, water is changed for 1 time in 10-15 days.
Preferably, during the Australia crayfish breeding period, 10-15kg of quicklime is splashed with dissolved water for 1 time every mu of rice field every 15-20 days for adjusting water quality and supplementing calcium.
Preferably, the capture specification is 75-200g of the Australian crayfish.
Preferably, the embodiment of the invention has the following advantages:
the embodiment of the invention utilizes the water body in the rice field to culture the Australia crayfish, can exert the effects of weeding, excrement fattening and the like of the Australia crayfish, realizes the symbiosis of rice and shrimps, realizes the effects of planting rice on the surface of the rice field, breeding the Australia crayfish in the water body, fertilizing the field with shrimp manure and symbiosis of rice and shrimps, and is an ecological agricultural production mode organically combining the planting industry and the aquaculture industry. According to the embodiment of the invention, the Australian freshwater lobster can be successfully cultured in the rice field by regulating and controlling the environment of the rice field, planting the water plants and strengthening the management, so that the Australian freshwater lobster culture channel can be effectively expanded. Meanwhile, the growth speed of the Australia crayfish is greatly improved by rich nutrient substances and growth environment in the rice field.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment of the invention provides a paddy field culture method for Australia crayfish, which comprises the following steps:
1. selection and treatment of rice fields
A rice field with the area of 10 mu is selected, the periphery of the rice field is wide and exposed to the sun, the illumination is sufficient, a water inlet and a water outlet of the rice field are independently separated, and a circular ditch is dug and built around the rice field. The distance between the circular trench and the edge of the rice field is 1.5m, the width of the upper opening of the circular trench is 3m, the width of the lower opening of the circular trench is 0.8m, and the area of the circular trench is 10% of the area of the whole rice field. The anti-escape device for preventing lobsters from escaping is circumferentially arranged on the outer side of the annular groove and is a plastic film or a calcium plastic plate, and the height of the anti-escape device is 40 cm.
2. Cultivation of aquatic weeds
Submerged plants are selected as aquatic weeds 15 days before seeding of Australian freshwater lobsters, and the submerged plants adopted in the embodiment of the invention are hydrilla verticillata, watermifoil, waterweed, Goldfish algae, potamogeton crispus and water peanuts. The aquatic weeds are mainly planted in the circular ditches or the paddy field ditches, the cultivation area of the aquatic weeds is strictly controlled, the aquatic weeds are uniformly distributed at random, and the planting area of the aquatic weeds is 30% of the cultivation water surface of the circular ditches. When the annular ditch is used for planting aquatic weeds, the water level depth of the annular ditch is 40 cm. After the aquatic weeds are planted, the weight of the fermented decomposed manure applied to each mu of rice field is 30 kg.
3. Stocking shrimp larvae
When the Australia freshwater lobster fries are put in the stocking, water testing is carried out, and the water testing survival rate of the lobster fries can reach 95 percent. 2000 shrimp seedlings with the body length of about 3cm are bred in each mu of rice field. When the temperature difference is less than 3 ℃ during stocking the shrimp seeds, slowly adding a small amount of water in the circular groove into the shrimp seed transporting container to adjust the water temperature until the water temperature in the shrimp seed transporting container is close to the water temperature in the circular groove, and then putting the shrimp seeds into the circular groove. Preferably, the stocking time of the shrimp fries is evening, and the stocking place is circumferentially and uniformly stocking along the circular groove.
Before stocking, sterilizing Australia crayfish fries by soaking in 5% salt solution for 5min or 5ppm potassium permanganate for 10min to kill pathogens.
4. Feeding of shrimp larvae
When the Australia crayfish fries are fed, the feeding amount of bait is based on the principle that the crayfish fries are saturated and do not leave residual bait, the crayfish fries are fed twice a day, once in the morning and once in the evening, the total daily feeding amount is 30% of the total daily feeding amount, the total daily feeding amount is 70% of the total daily feeding amount, the content of crude protein in the fed bait is required to be 36%, preferably, the feeding amount is 3% of the weight of the Australia crayfish, and when the feeding amount is moderate, the crayfish fries are beneficial to growth of the crayfish and the good state of water quality can be maintained. And (5) properly feeding the bait for the wild trash fish once every 3 days. The rich nutrient substances in the rice field also reduce the feeding amount of the bait.
5. Water quality control in rice field
The water level in the annular ditch is adjusted to adapt to the growth of rice as an adjusting basis, and the growth requirements of Australia crayfish are met. Periodically changing water in the circular ditches, releasing seedlings in 5-6 months each year, and keeping the water depth in the rice field to be 3cm, so as to allow the Australia crayfish to enter the rice field to find food; the water level can be adjusted to the maximum in 7-8 months every year, and before the rice is harvested, the water level is gradually reduced to prepare for harvesting. The freshwater lobster growth requires sufficient dissolved oxygen of water in the circular ditch and fresh water quality. Changing water once in 7 days between 5-6 months every year, wherein the water changing depth is 8cm each time; in the high-temperature season of 7-8 months per year, water is changed for 1 time every week, and the water changing depth is 10cm each time; the water is changed for 1 time 10 days after 9 months every year, and the water level is kept relatively stable after the water is changed.
The Australia crayfish has strong disease resistance, less diseases and higher requirement on the transparency of a water body, and the transparency suitable for the growth of the crayfish is 25-40 cm. And (3) sprinkling 10kg of quicklime into each mu of rice field for 1 time every 15 days during the lobster breeding period, and regulating the water quality.
6. Disease control of lobsters
Common diseases of lobsters include diseases caused by gill disease, brown spot, parasites and the like, and are mainly controlled by medicinal prevention and treatment measures. At intervals of 15 days, 10 kg/mu of quicklime can be added with water to prepare a solution, and then the solution is splashed for 1 time in the whole pool, so that the effects of disinfection and disease prevention can be achieved, and the calcium required by the growth of lobsters can be supplemented. Meanwhile, drugs such as photosynthetic bacteria, multiple vitamins and the like are added into the feed regularly to prepare a medicinal bait for feeding, so that the physique of the Australia crayfish is enhanced, and the occurrence of diseases is reduced.
7. Catching of freshwater lobsters
The Australia crayfish is stocked in the current year and harvested in the current year. The Australia crayfish is cultured in the rice field, crayfish seeds are placed once, and the crayfish is cultured for more than 3 months, so that the cultured crayfish can reach 75-200g, and the crayfish can be captured. When the lobsters are captured, the capturing tool can be placed in the circular trench, and the captured lobsters are taken once every morning.
Example 2
The embodiment of the invention provides a paddy field culture method for Australia crayfish, which comprises the following steps:
1. selection and treatment of rice fields
A paddy field with the area of 30 mu is selected, the periphery of the paddy field is opened to the sun, the illumination is sufficient, a water inlet and a water outlet are independently separated, and a circular ditch is dug and built around the paddy field. The distance between the circular trench and the edge of the rice field is 1.8m, the width of the upper opening of the circular trench is 3.5m, the width of the lower opening of the circular trench is 1.0m, and the area of the circular trench is 10% of the area of the whole rice field. The anti-escape device for preventing lobsters from escaping is circumferentially arranged on the outer side of the annular groove and is a plastic film or a calcium plastic plate, and the height of the anti-escape device is 45 cm. Preferably, a trench can be formed in the rice field, wherein the trench has a width of 1.5m and a depth of 0.6 m.
2. Cultivation of aquatic weeds
Selecting submerged plants as aquatic weeds 15 days before seeding of Australian freshwater lobsters, specifically, the submerged plants are hydrilla verticillata, watermifoil, waterweed, hornwort, curly pondweed and water peanuts. The aquatic weeds are mainly planted in the ring ditches or the field ditches in the paddy field, the cultivation area of the aquatic weeds is strictly controlled, the aquatic weeds are uniformly distributed at random, and the planting area of the aquatic weeds is 40% of the cultivation water surface of the ring ditches. When the annular ditch is used for planting aquatic weeds, the water level depth of the annular ditch is 50 cm. After the aquatic weeds are planted, the weight of the fermented decomposed manure applied to each mu of rice field is 40 kg.
3. Stocking shrimp larvae
When the Australia freshwater lobster fries are put in the stocking, water testing is carried out, and the shrimp fries can be put in until the water testing survival rate of the shrimp fries reaches 98%. 1500 shrimp seedlings with the body length of about 4cm are bred in each mu of rice field. When the temperature difference is less than 3 ℃ during stocking the shrimp seeds, slowly adding a small amount of water in the circular groove into the shrimp seed conveying container to adjust the water temperature until the water temperature in the shrimp seed conveying container is close to the water temperature in the circular groove, and then stocking the shrimp seeds in the circular groove uniformly along the circumferential direction of the circular groove when the stocking time is in the evening.
Before stocking, sterilizing prawn larva by soaking in 5% salt solution for 8min or 5ppm potassium permanganate for 15min to kill pathogen.
4. Feeding of shrimp larvae
When feeding the shrimp larvae, feeding the shrimp larvae twice every day, once in the morning and at night, wherein the feeding amount of the bait is 25% of the total daily feeding amount, and 75% of the total daily feeding amount, and the content of crude protein in the fed bait is required to be 40%, and the feeding amount of the bait is 4% of the weight of the Australian crayfish, so that the feed is moderate, the feed is beneficial to the growth of the crayfish, and the good state of water quality can be maintained. The wild trash fish is properly fed, and the feeding is carried out once every 4 days. The rich nutrient substances in the rice field also reduce the feeding amount of the bait.
5. Water quality control in rice field
The water level in the annular ditch takes the growth of rice as a basis and meets the growth requirement of Australia crayfish. Periodically changing water in the circular ditches, putting seedlings in 5-6 months per year, and keeping the water depth in the rice field to be 4cm so as to allow the Australia crayfish to enter the rice field for foraging; the water level can be adjusted to the maximum in 7-8 months every year, and before the rice is harvested, the water level is gradually reduced to prepare for harvesting. The freshwater lobster growth requires sufficient dissolved oxygen of water in the circular ditch and fresh water quality. Changing water once every 7 days between 5-6 months every year, wherein the water changing depth is 9cm each time; in the high-temperature season of 7-8 months per year, water is changed for 1 time every week, and the water changing depth is 12.5cm each time; water was changed 1 time 12 days after 9 months each year. The water level should remain relatively stable after water change.
The Australia crayfish has strong disease resistance, less diseases and higher requirement on the transparency of a water body, and the transparency suitable for the growth of the crayfish is 25-40 cm. And 12.5kg of quicklime is splashed for 1 time by using the dissolved water in each mu of rice field every 18 days during the lobster breeding period, and the water quality is adjusted.
6. Disease control of lobsters
Common diseases of lobsters include diseases caused by gill disease, brown spot, parasites and the like, and are mainly controlled by medicinal prevention and treatment measures. At intervals of 18 days, 12.5 kg/mu of quicklime can be added with water to prepare a solution, and then the solution is splashed for 1 time in the whole pool, so that the effects of disinfection and disease prevention can be achieved, and calcium required by the growth of lobsters can be supplemented. Meanwhile, drugs such as photosynthetic bacteria, multiple vitamins and the like are added into the feed regularly to prepare a medicinal bait for feeding, so that the physique of the Australia crayfish is enhanced, and the occurrence of diseases is reduced.
7. Catching of freshwater lobsters
The Australia crayfish is stocked in the current year and harvested in the current year. The Australia crayfish is cultured in the rice field, crayfish seeds are placed once, and the crayfish is cultured for more than 3 months, so that the cultured crayfish can reach 75-200g, and the crayfish can be captured. When the lobsters are captured, the capturing tool can be placed in the circular trench, and the captured lobsters are taken once every morning.
Example 3
The embodiment of the invention provides a paddy field culture method for Australia crayfish, which comprises the following steps:
1. selection and treatment of rice fields
A rice field with an area of 50 mu is selected, the periphery of the rice field is opened to the sun, the illumination is sufficient, a water inlet and a water outlet are independently separated, and a circular ditch is dug and built around the rice field. The distance between the circular trench and the edge of the rice field is 2m, the width of the upper opening of the circular trench is 4m, the width of the lower opening of the circular trench is 1.2m, and the area of the circular trench is 10% of the area of the whole rice field. The anti-escape device for preventing lobsters from escaping is circumferentially arranged on the outer side of the annular groove and is a plastic film or a calcium plastic plate, and the height of the anti-escape device is 45 cm. The width of the ditch in the rice field is 1.6m, and the depth is 0.8 m.
2. Cultivation of aquatic weeds
Submerged plants are selected as aquatic weeds 15 days before seeding of Australian freshwater lobsters, and the submerged plants adopted in the embodiment of the invention are hydrilla verticillata, watermifoil, waterweed, Goldfish algae, potamogeton crispus and water peanuts. The aquatic weeds are mainly planted in the ring ditches or the field ditches in the rice field, the cultivation area of the aquatic weeds is strictly controlled, the aquatic weeds are uniformly distributed at random, and the planting area of the aquatic weeds is 50% of the cultivation water surface of the ring ditches. When the annular ditch is used for planting aquatic weeds, the water level depth of the annular ditch is 60 cm. After the aquatic weeds are planted, the weight of the fermented decomposed manure applied to each mu of rice field is 50 kg.
3. Stocking shrimp larvae
When the Australia crayfish fries are released for breeding, water testing is carried out, and the crayfish fries can be released only when the water testing survival rate of the Australia crayfish fries reaches 100%. 1000 shrimp seedlings with the body length of about 5cm are bred in each mu of rice field. When the temperature difference is less than 3 ℃ during stocking the shrimp seeds, slowly adding a small amount of water in the circular groove into the shrimp seed conveying container to adjust the water temperature until the water temperature in the shrimp seed conveying container is close to the water temperature in the circular groove, and then stocking the shrimp seeds in the circular groove uniformly along the circumferential direction of the circular groove when the stocking time is in the evening.
Preferably, before the Australia crayfish fries are put into the breeding field, the crayfish fries are disinfected, and the disinfection method is to use 5% of salt solution to soak for 8min or 5ppm of potassium permanganate to soak for 20min to kill pathogens.
4. Feeding of shrimp larvae
When feeding the crayfish fries, the feeding amount of the bait is based on the principle that the crayfish fries are saturated and do not leave residual bait, the crayfish fries are fed twice a day, the crayfish fries are fed once in the morning and at night, 20% of the total daily feeding amount is fed in the morning and 80% of the total daily feeding amount is fed in the evening, the content of crude protein in the fed bait is required to be 44%, preferably, the feeding amount is 5% of the weight of the Australia crayfish, and when the feeding amount is moderate, the crayfish fries can not only be beneficial to growth of the crayfish, but also the good. The wild trash fish is properly fed, and the feeding is carried out once every 5 days. The rich nutrient substances in the rice field also reduce the feeding amount of the bait.
5. Water quality control in rice field
The water level in the annular ditch takes the growth of rice as a basis and meets the growth requirement of Australia crayfish. Periodically changing water in the circular ditches, putting seedlings in 5-6 months per year, and keeping the water depth in the rice field to be 5cm so as to allow the Australia crayfish to enter the rice field for foraging; the water level can be adjusted to the maximum in 7-8 months every year, and the water level is gradually reduced before the rice is harvested to prepare for harvesting. The freshwater lobster growth requires sufficient dissolved oxygen of water in the circular ditch and fresh water quality. Changing water once in 10 days between 5-6 months every year, wherein the water changing depth is 9cm each time; in the high-temperature season of 7-8 months per year, water is changed for 2 times per week, and the water changing depth is 15cm each time; water was changed 1 time 15 days after 9 months of each year. The water level should remain relatively stable after water change.
The Australia crayfish has strong disease resistance, less diseases and higher requirement on the transparency of a water body, and the transparency suitable for the growth of the crayfish is 25-40 cm. And 5, sprinkling 15kg of quicklime water for each mu of rice field for 1 time every 20 days during the lobster breeding period, and regulating the water quality.
6. Disease control of lobsters
Common diseases of lobsters include diseases caused by gill disease, brown spot, parasites and the like, and are mainly controlled by medicinal prevention and treatment measures. At intervals of 20 days, 15 kg/mu of quicklime can be added with water to prepare a solution, and then the solution is splashed for 1 time in the whole pool, so that the effects of disinfection and disease prevention can be achieved, and calcium required by lobster growth can be supplemented. Meanwhile, drugs such as photosynthetic bacteria, multiple vitamins and the like are added into the feed regularly to prepare a medicinal bait for feeding, so that the physique of the Australia crayfish is enhanced, and the occurrence of diseases is reduced.
7. Catching of freshwater lobsters
The Australia crayfish is stocked in the current year and harvested in the current year. The Australia crayfish is cultured in the rice field, crayfish seeds are placed once, and the crayfish is cultured for more than 3 months, so that the cultured crayfish can reach 75-200g, and the crayfish can be captured. When the lobsters are captured, the capturing tool can be placed in the circular trench, and the captured lobsters are taken once every morning.
According to the embodiment of the invention, the Australia crayfish is cultured in the rice field without additionally occupying the culture area, so that the purposes of one water and two purposes and rice and shrimp symbiosis can be realized, no chemical medicine is used in the whole process of culturing, the produced Australia crayfish has good quality, is healthy, green and pollution-free, and meanwhile, the use amount of pesticide and fertilizer of rice is reduced, so that the ecological culture mode is environment-friendly. Meanwhile, the growth speed of the Australia crayfish is greatly improved by rich nutrient substances and growth environment in the rice field.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The Australia crayfish paddy field breeding method is characterized by comprising the following steps:
selecting a paddy field with 10-50 mu of sunlight irradiation sufficient, arranging ring ditches on the peripheral sides of the paddy field, or arranging field ditches in the paddy field, wherein the area of the ring ditches is not more than 10% of the area of the paddy field;
uniformly planting submerged plants in the circular ditches 15 days before the Australia freshwater lobster seedlings are put in the breeding field;
after the Australia crayfish test water is disinfected, uniformly breeding the Australia crayfish in the circular ditch, feeding the Australia crayfish seedlings twice a day, adjusting the water level in the circular ditch in the breeding process to ensure that the Australia crayfish can enter the rice field to find food, and simultaneously, regularly adding quicklime into the water;
after more than 3 months of culture, the Australian lobster which reaches the capture specification is captured.
2. The method of claim 1, wherein the method comprises the steps of,
the distance between the ring ditch and the edge of the rice field is 1.5-2m, the width of the upper opening of the ring ditch is 3-4m, the width of the lower opening of the ring ditch is 0.8-1.2m, and the depth of the ring ditch is 1.0-1.5 m.
3. The method of claim 1, wherein the method comprises the steps of,
the submerged plant is hydrilla verticillata, watermifoil, waterweed, goldfish algae, curly pondweed or water peanut;
the submerged plants are uniformly distributed in the annular ditch, and the planting area of the submerged plants is 30-50% of the culture water surface.
4. The method of claim 1, wherein the method comprises the steps of,
the depth of the water level in the annular groove is 1.0-1.5 m.
5. The method of claim 1, wherein the method comprises the steps of,
when the Australia crayfish is put in the test water for stocking, the survival rate of the test water reaches 95-100%, the Australia crayfish fries are put in the test water, 1000 plus 2000 Australia crayfish fries can be stocked in each mu of rice field, the body length of the Australia crayfish fries is 3-5cm, and the temperature difference is less than 3 ℃ when the crayfish fries are stocked;
before breeding the Australia crayfish, soaking the Australia crayfish in 5% salt solution for 5-10min or 5ppm potassium permanganate for 10-20 min.
6. The method of claim 1, wherein the method comprises the steps of,
in the feeding process, 20-30% of the total daily bait amount is thrown in the morning every day, 70-80% of the total daily bait amount is thrown in the evening every day, and the crude protein content of the thrown bait is 36-44%.
7. The method of claim 6, wherein said method comprises the steps of,
the bait is added with photosynthetic bacteria, various vitamins and other medicines to enhance the physique of the Australia crayfish and reduce the occurrence of diseases.
8. The method of claim 1, wherein the method comprises the steps of,
the stocking time of the Australian dragon freshwater lobster is 5-6 months per year, water is changed once in 7-10 days, and the water changing depth is 8-10 cm;
in the high-temperature season of 7-8 months per year, water is changed for 1-2 times every week, and the water changing depth is 10-15cm each time;
after 9 months each year, water is changed for 1 time in 10-15 days.
9. The method of claim 1, wherein the method comprises the steps of,
and in the Australia freshwater lobster breeding period, 10-15kg of quicklime is splashed with dissolved water for 1 time every mu of rice field every 15-20 days for regulating water quality and supplementing calcium.
10. The method of claim 1, wherein the method comprises the steps of,
the capture specification is that the weight of the Australia crayfish is 75-200 g.
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