CN105432516A - Method for cultivating river crabs in alkaline pond - Google Patents
Method for cultivating river crabs in alkaline pond Download PDFInfo
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- CN105432516A CN105432516A CN201510794536.XA CN201510794536A CN105432516A CN 105432516 A CN105432516 A CN 105432516A CN 201510794536 A CN201510794536 A CN 201510794536A CN 105432516 A CN105432516 A CN 105432516A
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- pond
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- river crab
- water
- alkaline
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- 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
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- 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
- Y02A40/818—Alternative feeds for fish, e.g. in aquacultures
Abstract
The invention discloses a method for cultivating river crabs in an alkaline pond. The method comprises the steps of selecting a nutrient-rich pond, and laying a layer of alkaline soil which is 10cm to 15cm thick on the surface of sludge; inserting and fixing a plurality of hollow columns each coated with a waterproof layer into the pond, erecting screen cloth between every two adjacent hollow columns, winding and fixing a hose, where a plurality of air holes are distributed uniformly, around the outer surface of each hollow column, and connecting one end of each hose with an aerator; putting juvenile crabs into fences of the pond in early February every year, adjusting the temperature of water in the pond to be between 15 DEG C and 18 DEG C, and putting 900 juvenile crabs per mu; putting 120kg to 130kg of snails into the fences for every 22 days, submerging the river crabs in a vigorous solution for 5-10 min after the river crabs are mature, and sprinkling, by mass percentage, 0.1% of a milkvetch root extraction solution on the surfaces of the river crabs. The river crabs have the advantages of being high in survival rate and fleshy.
Description
Technical field
The present invention relates to cultural method.More particularly, the present invention relates to a kind of method of cultivating river crab in alkaline pond.
Background technology
River crab is the maximum fresh water crab of China's output, is one of unique flavor, nutritious aquatic products treasure.Along with the progress of society and the needs of vegetable basket project, its production meaning and economic benefit are affirmed fully.River crab edible part protein content is 14%, and containing several amino acids, fat content is 5.9%, and carbohydrate content is 7%, vitamin enriches, for the hat of conventional aquatic products, become the aquaculture kind that the Yangtze river basin is important, but owing to there is impact on water body, the scale of lake net differential method is strictly controlled, meanwhile, river crab consumption market is increasing, and therefore pond culture scale expands rapidly.
Summary of the invention
An object of the present invention is to solve at least the problems referred to above, and the advantage will illustrated at least is below provided.
A further object of the invention is to provide the cultural method of a kind of river crab, improves the survival rate of river crab, makes the meat of river crab more fertile, shortens the processing maturation period of river crab simultaneously, reduce feed cost.
In order to realize, according to these objects of the present invention and other advantage, providing a kind of method of cultivating river crab in alkaline pond, comprise the following steps:
Preparation before putting in a suitable place to breed: select eutrophic pond, pond bottom is carried out smooth, cleaning pond bottom mud, pond bottom silt depth is made to be 20-25cm, and lay at muck surface the basic soil that a layer thickness is 10-15cm, the pond of every cubic metre applies the limewash of 30kg1%, and insert in described pond and fix some hollow cylinders smearing watertight composition, 20 object screen cloths are set up between adjacent two hollow cylinders, described screen cloth inserts in mud, and described screen cloth and described hollow cylinder are enclosed to form a cuboid; Be wound around at each described hollow cylinder outer surface and fix flexible pipe, described flexible pipe is provided with and is evenly distributed with the ventilation hole that some apertures are 0.2cm, one end of described flexible pipe is connected with aerator;
Putting in a suitable place to breed of seed: by juvenile crab dropping in the fence in described pond at the beginning of annual 2 months, regulate pond water temperature to be 15-18 DEG C, throws in 900 juvenile crabs for every mu;
Feeding and management: every 22 days, throws in the spiral shell of 120-130kg in fence, adds 0.6kg/m every other month in pond
2quicklime;
Process after salvaging: after river crab maturation, pulled out, is soaked in 5-10min in vigor liquid, is the Radix Astragali extractive solution of 0.1% afterwards at river crab surface sprinkling mass fraction;
Described vigor liquid comprises the raw material of following parts by weight: the pure water of 1000 parts, L-selenomethionine 1 part, B B-complex 2-3 part and ramulus mori 5-8 part.
Preferably, water surface 20-26cm is stretched out at the top of described hollow cylinder, is erected with the first optical plate at the top of described hollow cylinder, and described first optical plate is reverse U shape, and described first optical plate can launch the visible ray of 560nm;
Described pond bottom is equipped with some the second optical plates reflecting the visible ray of 560nm, and the upper and lower end face of described second optical plate is all parallel with described pond bottom, and the summation of some described second optical plate areas is no more than 1/4 of described pond bottom area.
Preferably, the preparation method of described vigor liquid is, the ramulus mori of above-mentioned weight portion and pure water is decocted and heats 20-30min, adds L-selenomethionine 1 part and the B B-complex of above-mentioned weight portion after being cooled to 20-25 DEG C.
Preferably, the bottom end closure of described hollow cylinder, upper end open, described hollow cylinder is provided with the through hole that some apertures are 0.2cm, after juvenile crab drops into pond, every other month, in each hollow cylinder, drop into antibacterial peptide, and pure water is filled in hollow cylinder, the amount of each antibacterial peptide dropped in pond is 30-50g/ mu.
Preferably, water quality management: every two weeks changes water in described pond once, and each quantity of exchanged water is 1/2 of the described pond water yield.
Preferably, the diameter of described flexible pipe is 8cm.
Preferably, the degree of depth that described fence and described hollow cylinder insert described pond bottom reaches 25cm.
The present invention at least comprises following beneficial effect:
1, basic soil has the effect improving river crab appetite, and is conducive to the shell of river crab;
2, screen cloth is utilized to enclose compared to steel wire more soft, less on the life impact of river crab;
3, each pond is changed water and is not entirely changed and be conducive to river crab to pond waters adaptation, also ensure that the dissolved oxygen amount of water body in pond;
4, in eutrophic pond, phytoplankton can be used as the feed of river crab, through the symbiosis in river crab and eutrophy pond, improves the eutrophication in pond, improves the water quality in pond, reduces the input of the feed of river crab, reduces feed cost;
5, antibacterial peptide drops into hollow cylinder, is released slowly in pond, an input amount can not causes burden to river crab greatly by through hole, and antibacterial peptide has powerful bactericidal effect, can improve the immunity of river crab, reduces the illness rate of river crab;
6, illumination promotes the calcareous absorption of river crab, be conducive to the growth of crust, make crab more fertile, illumination simultaneously can improve the photosynthesis of water plants, improve the dissolved oxygen amount in pond, utilize the combination of the first optical plate and the second optical plate, by more sunshine guiding pond, improve the availability of sunshine;
7, after crab is pulled out, soak the survival rate that vigor liquid can improve crab, strengthen the resistance of river crab, vigor liquid is nontoxic simultaneously, can not cause any burden to river crab and human body;
8, by flexible pipe and aerator conbined usage, the oxygen in pond is more evenly distributed.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, can implement according to this with reference to specification word to make those skilled in the art.
Embodiment 1
A method for cultivating river crab in alkaline pond, comprises the following steps:
Preparation before putting in a suitable place to breed: select eutrophic pond, pond bottom is carried out smooth, cleaning pond bottom mud, pond bottom silt depth is made to be 20cm, and lay at muck surface the basic soil that a layer thickness is 10cm, the pond of every cubic metre applies the limewash of 30kg1%, and insert in described pond and fix some hollow cylinders smearing watertight composition, 20 object screen cloths are set up between adjacent two hollow cylinders, described screen cloth inserts in mud, and described screen cloth and described hollow cylinder are enclosed to form a cuboid; Be wound around at each described hollow cylinder outer surface and fix flexible pipe, the diameter of described flexible pipe is 8cm.Described flexible pipe is provided with and is evenly distributed with the ventilation hole that some apertures are 0.2cm, one end of described flexible pipe is connected with aerator.
Putting in a suitable place to breed of seed: by juvenile crab dropping in the fence in described pond at the beginning of annual 2 months, regulate pond water temperature to be 15 DEG C, throws in 900 juvenile crabs for every mu;
Feeding and management: every 22 days, throws in the spiral shell of 120kg in fence, adds 0.6kg/m every other month in pond
2quicklime;
Process after salvaging: after river crab maturation, pulled out, is soaked in 5min in vigor liquid, is the Radix Astragali extractive solution of 0.1% afterwards at river crab surface sprinkling mass fraction;
Described vigor liquid comprises the raw material of following parts by weight: the pure water of 1000 parts, L-selenomethionine 1 part, B B-complex 2 parts and ramulus mori 5 parts.The preparation method of described vigor liquid is, the ramulus mori of above-mentioned weight portion and pure water is decocted and heats 20min, adds L-selenomethionine 1 part and the B B-complex of above-mentioned weight portion after being cooled to 20 DEG C.
In the present embodiment, water surface 20cm is stretched out at the top of described hollow cylinder, is erected with the first optical plate at the top of described hollow cylinder, and described first optical plate is reverse U shape, and described first optical plate can launch the visible ray of 560nm;
Described pond bottom is equipped with some the second optical plates reflecting the visible ray of 560nm, and the upper and lower end face of described second optical plate is all parallel with described pond bottom, and the summation of some described second optical plate areas is no more than 1/4 of described pond bottom area.
In the present embodiment, the bottom end closure of described hollow cylinder, upper end open, described hollow cylinder is provided with the through hole that some apertures are 0.2cm, after juvenile crab drops into pond, every other month, in each hollow cylinder, drop into antibacterial peptide, and pure water is filled in hollow cylinder, the amount of each antibacterial peptide dropped in pond is 30g/ mu.
In the present embodiment, water quality management: every two weeks changes water in described pond once, and each quantity of exchanged water is 1/2 of the described pond water yield.
In the present embodiment, the degree of depth that described fence and described hollow cylinder insert described pond bottom reaches 25cm.
Embodiment 2
A method for cultivating river crab in alkaline pond, comprises the following steps:
Preparation before putting in a suitable place to breed: select eutrophic pond, pond bottom is carried out smooth, cleaning pond bottom mud, pond bottom silt depth is made to be 25cm, and lay at muck surface the basic soil that a layer thickness is 15cm, the pond of every cubic metre applies the limewash of 30kg1%, and insert in described pond and fix some hollow cylinders smearing watertight composition, 20 object screen cloths are set up between adjacent two hollow cylinders, described screen cloth inserts in mud, and described screen cloth and described hollow cylinder are enclosed to form a cuboid; Be wound around at each described hollow cylinder outer surface and fix flexible pipe, the diameter of described flexible pipe is 8cm.Described flexible pipe is provided with and is evenly distributed with the ventilation hole that some apertures are 0.2cm, one end of described flexible pipe is connected with aerator.
Putting in a suitable place to breed of seed: by juvenile crab dropping in the fence in described pond at the beginning of annual 2 months, regulate pond water temperature to be 18 DEG C, throws in 900 juvenile crabs for every mu;
Feeding and management: every 22 days, throws in the spiral shell of 130kg in fence, adds 0.6kg/m every other month in pond
2quicklime;
Process after salvaging: after river crab maturation, pulled out, is soaked in 10min in vigor liquid, is the Radix Astragali extractive solution of 0.1% afterwards at river crab surface sprinkling mass fraction;
Described vigor liquid comprises the raw material of following parts by weight: the pure water of 1000 parts, L-selenomethionine 1 part, B B-complex 3 parts and ramulus mori 8 parts.The preparation method of described vigor liquid is, the ramulus mori of above-mentioned weight portion and pure water is decocted and heats 30min, adds L-selenomethionine 1 part and the B B-complex of above-mentioned weight portion after being cooled to 25 DEG C.
In the present embodiment, water surface 26cm is stretched out at the top of described hollow cylinder, is erected with the first optical plate at the top of described hollow cylinder, and described first optical plate is reverse U shape, and described first optical plate can launch the visible ray of 560nm;
Described pond bottom is equipped with some the second optical plates reflecting the visible ray of 560nm, and the upper and lower end face of described second optical plate is all parallel with described pond bottom, and the summation of some described second optical plate areas is no more than 1/4 of described pond bottom area.
In the present embodiment, the bottom end closure of described hollow cylinder, upper end open, described hollow cylinder is provided with the through hole that some apertures are 0.2cm, after juvenile crab drops into pond, every other month, in each hollow cylinder, drop into antibacterial peptide, and pure water is filled in hollow cylinder, the amount of each antibacterial peptide dropped in pond is 50g/ mu.
In the present embodiment, water quality management: every two weeks changes water in described pond once, and each quantity of exchanged water is 1/2 of the described pond water yield.
In the present embodiment, the degree of depth that described fence and described hollow cylinder insert described pond bottom reaches 25cm.
Embodiment 3
A method for cultivating river crab in alkaline pond, comprises the following steps:
Preparation before putting in a suitable place to breed: select eutrophic pond, pond bottom is carried out smooth, cleaning pond bottom mud, pond bottom silt depth is made to be 24cm, and lay at muck surface the basic soil that a layer thickness is 13cm, the pond of every cubic metre applies the limewash of 30kg1%, and insert in described pond and fix some hollow cylinders smearing watertight composition, 20 object screen cloths are set up between adjacent two hollow cylinders, described screen cloth inserts in mud, and described screen cloth and described hollow cylinder are enclosed to form a cuboid; Be wound around at each described hollow cylinder outer surface and fix flexible pipe, the diameter of described flexible pipe is 8cm.Described flexible pipe is provided with and is evenly distributed with the ventilation hole that some apertures are 0.2cm, one end of described flexible pipe is connected with aerator.
Putting in a suitable place to breed of seed: by juvenile crab dropping in the fence in described pond at the beginning of annual 2 months, regulate pond water temperature to be 16 DEG C, throws in 900 juvenile crabs for every mu;
Feeding and management: every 22 days, throws in the spiral shell of 126kg in fence, adds 0.6kg/m every other month in pond
2quicklime;
Process after salvaging: after river crab maturation, pulled out, is soaked in 8min in vigor liquid, is the Radix Astragali extractive solution of 0.1% afterwards at river crab surface sprinkling mass fraction;
Described vigor liquid comprises the raw material of following parts by weight: the pure water of 1000 parts, L-selenomethionine 1 part, B B-complex 3 parts and ramulus mori 7 parts.The preparation method of described vigor liquid is, the ramulus mori of above-mentioned weight portion and pure water is decocted and heats 25min, adds L-selenomethionine 1 part and the B B-complex of above-mentioned weight portion after being cooled to 24 DEG C.
In the present embodiment, water surface 22cm is stretched out at the top of described hollow cylinder, is erected with the first optical plate at the top of described hollow cylinder, and described first optical plate is reverse U shape, and described first optical plate can launch the visible ray of 560nm;
Described pond bottom is equipped with some the second optical plates reflecting the visible ray of 560nm, and the upper and lower end face of described second optical plate is all parallel with described pond bottom, and the summation of some described second optical plate areas is no more than 1/4 of described pond bottom area.
In the present embodiment, the bottom end closure of described hollow cylinder, upper end open, described hollow cylinder is provided with the through hole that some apertures are 0.2cm, after juvenile crab drops into pond, every other month, in each hollow cylinder, drop into antibacterial peptide, and pure water is filled in hollow cylinder, the amount of each antibacterial peptide dropped in pond is 38g/ mu.
In the present embodiment, water quality management: every two weeks changes water in described pond once, and each quantity of exchanged water is 1/2 of the described pond water yield.
In the present embodiment, the degree of depth that described fence and described hollow cylinder insert described pond bottom reaches 25cm.
Experimental comparison:
Experimental group is the method cultivating river crab of the present embodiment 1/2/3, control group adopts conventional method for breeding river crab cultivating river crab, do not add antibacterial peptide in control group, do not build the first light guide plate and the second light guide plate, river crab does not soak vigor liquid after pulling out, in pond, flexible pipe and hollow cylinder are not set yet, do not lay basic soil in pond bottom.Experimental data is as follows:
Table 1
We can know by experiment, and the river crab survival rate utilizing the present invention to cultivate is high, and on average the weight of every river crab is 3.5 liang simultaneously, and individual pork is fertile.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the embodiment described.
Claims (7)
1. the method for cultivating river crab in alkaline pond, is characterized in that, comprise the following steps:
Preparation before putting in a suitable place to breed: select eutrophic pond, pond bottom is carried out smooth, cleaning pond bottom mud, pond bottom silt depth is made to be 20-25cm, and lay at muck surface the basic soil that a layer thickness is 10-15cm, the pond of every cubic metre applies the limewash of 30kg1%, and insert in described pond and fix some hollow cylinders smearing watertight composition, 20 object screen cloths are set up between adjacent two hollow cylinders, described screen cloth inserts in mud, and described screen cloth and described hollow cylinder are enclosed to form a cuboid; Be wound around at each described hollow cylinder outer surface and fix flexible pipe, described flexible pipe is provided with and is evenly distributed with the ventilation hole that some apertures are 0.2cm, one end of described flexible pipe is connected with aerator;
Putting in a suitable place to breed of seed: by juvenile crab dropping in the fence in described pond at the beginning of annual 2 months, regulate pond water temperature to be 15-18 DEG C, throws in 900 juvenile crabs for every mu;
Feeding and management: every 22 days, throws in the spiral shell of 120-130kg in fence, adds 0.6kg/m every other month in pond
2quicklime;
Process after salvaging: after river crab maturation, pulled out, is soaked in 5-10min in vigor liquid, is the Radix Astragali extractive solution of 0.1% afterwards at river crab surface sprinkling mass fraction;
Described vigor liquid comprises the raw material of following parts by weight: the pure water of 1000 parts, L-selenomethionine 1 part, B B-complex 2-3 part and ramulus mori 5-8 part.
2. the method for cultivating river crab in alkaline pond as claimed in claim 1, it is characterized in that, water surface 20-26cm is stretched out at the top of described hollow cylinder, the first optical plate is erected with at the top of described hollow cylinder, described first optical plate is reverse U shape, and described first optical plate can launch the visible ray of 560nm;
Described pond bottom is equipped with some the second optical plates reflecting the visible ray of 560nm, and the upper and lower end face of described second optical plate is all parallel with described pond bottom, and the summation of some described second optical plate areas is no more than 1/4 of described pond bottom area.
3. the method for cultivating river crab in alkaline pond as claimed in claim 1, it is characterized in that, the preparation method of described vigor liquid is, the ramulus mori of above-mentioned weight portion and pure water are decocted and heats 20-30min, after being cooled to 20-25 DEG C, add L-selenomethionine 1 part and the B B-complex of above-mentioned weight portion.
4. the method for cultivating river crab in alkaline pond as claimed in claim 2, it is characterized in that, the bottom end closure of described hollow cylinder, upper end open, described hollow cylinder is provided with the through hole that some apertures are 0.2cm, after juvenile crab drops into pond, every other month, in each hollow cylinder, drop into antibacterial peptide, and fill pure water in hollow cylinder, the amount of each antibacterial peptide dropped in pond is 30-50g/ mu.
5. the method for cultivating river crab in alkaline pond as claimed in claim 4, is characterized in that, water quality management: every two weeks changes water in described pond once, and each quantity of exchanged water is 1/2 of the described pond water yield.
6. the method for cultivating river crab in alkaline pond as claimed in claim 5, it is characterized in that, the diameter of described flexible pipe is 8cm.
7. the method for cultivating river crab in alkaline pond as claimed in claim 6, it is characterized in that, the degree of depth that described fence and described hollow cylinder insert described pond bottom reaches 25cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510794536.XA CN105432516B (en) | 2015-11-18 | 2015-11-18 | The method of cultivating river crab in alkaline pond |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510794536.XA CN105432516B (en) | 2015-11-18 | 2015-11-18 | The method of cultivating river crab in alkaline pond |
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| CN105432516A true CN105432516A (en) | 2016-03-30 |
| CN105432516B CN105432516B (en) | 2018-06-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1568677A (en) * | 2004-05-11 | 2005-01-26 | 潘洪强 | Nuisance free big sized river crab ecological cultivation method |
| CN101233904A (en) * | 2008-02-28 | 2008-08-06 | 吴江市邦农饲料有限公司 | Fodder for cultivating river crab |
| CN101584304A (en) * | 2009-05-16 | 2009-11-25 | 潘洪强 | Method for ecologically culturing high-quality red testis river crabs |
| CN101905995A (en) * | 2010-06-24 | 2010-12-08 | 中国水产科学研究院淡水渔业研究中心 | Health maintenance agent for waterweeds in aquaculture pond of freshwater shrimps and crabs |
| CN103548724A (en) * | 2013-10-18 | 2014-02-05 | 叶建生 | River crab integrated culture method in ponds |
| JP2014168422A (en) * | 2013-03-04 | 2014-09-18 | Ihi Corp | Spawning bank, artificial fishing bank, and method for providing spawning site for marine life |
| CN104430077A (en) * | 2014-11-11 | 2015-03-25 | 重庆茂升林业开发有限公司 | River crab artificial breeding technology |
| CN104604755A (en) * | 2013-11-04 | 2015-05-13 | 曹全民 | River crab culturing method |
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2015
- 2015-11-18 CN CN201510794536.XA patent/CN105432516B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1568677A (en) * | 2004-05-11 | 2005-01-26 | 潘洪强 | Nuisance free big sized river crab ecological cultivation method |
| CN101233904A (en) * | 2008-02-28 | 2008-08-06 | 吴江市邦农饲料有限公司 | Fodder for cultivating river crab |
| CN101584304A (en) * | 2009-05-16 | 2009-11-25 | 潘洪强 | Method for ecologically culturing high-quality red testis river crabs |
| CN101905995A (en) * | 2010-06-24 | 2010-12-08 | 中国水产科学研究院淡水渔业研究中心 | Health maintenance agent for waterweeds in aquaculture pond of freshwater shrimps and crabs |
| JP2014168422A (en) * | 2013-03-04 | 2014-09-18 | Ihi Corp | Spawning bank, artificial fishing bank, and method for providing spawning site for marine life |
| CN103548724A (en) * | 2013-10-18 | 2014-02-05 | 叶建生 | River crab integrated culture method in ponds |
| CN104604755A (en) * | 2013-11-04 | 2015-05-13 | 曹全民 | River crab culturing method |
| CN104430077A (en) * | 2014-11-11 | 2015-03-25 | 重庆茂升林业开发有限公司 | River crab artificial breeding technology |
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