CN108605876A - A kind of cultural method of river crab - Google Patents
A kind of cultural method of river crab Download PDFInfo
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- CN108605876A CN108605876A CN201810458663.6A CN201810458663A CN108605876A CN 108605876 A CN108605876 A CN 108605876A CN 201810458663 A CN201810458663 A CN 201810458663A CN 108605876 A CN108605876 A CN 108605876A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 149
- 238000009360 aquaculture Methods 0.000 claims abstract description 37
- 244000144974 aquaculture Species 0.000 claims abstract description 37
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- 235000013305 food Nutrition 0.000 claims abstract description 6
- 238000009940 knitting Methods 0.000 claims abstract description 5
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- 241000252233 Cyprinus carpio Species 0.000 claims description 5
- 244000000626 Daucus carota Species 0.000 claims description 5
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- 235000019733 Fish meal Nutrition 0.000 claims description 5
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- 229940022405 astaxanthin Drugs 0.000 claims description 5
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- 239000001963 growth medium Substances 0.000 claims description 5
- 239000006210 lotion Substances 0.000 claims description 5
- 235000013372 meat Nutrition 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 102000004169 proteins and genes Human genes 0.000 claims description 5
- 108090000623 proteins and genes Proteins 0.000 claims description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims description 5
- 230000003442 weekly effect Effects 0.000 claims description 5
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- 239000000618 nitrogen fertilizer Substances 0.000 description 3
- 239000002686 phosphate fertilizer Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000000246 remedial effect Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- QCVGEOXPDFCNHA-UHFFFAOYSA-N 5,5-dimethyl-2,4-dioxo-1,3-oxazolidine-3-carboxamide Chemical compound CC1(C)OC(=O)N(C(N)=O)C1=O QCVGEOXPDFCNHA-UHFFFAOYSA-N 0.000 description 1
- 241000040710 Chela Species 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
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- 244000269722 Thea sinensis Species 0.000 description 1
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Classifications
-
- 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
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
- A23K10/22—Animal feeding-stuffs from material of animal origin from fish
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
- A23K20/105—Aliphatic or alicyclic compounds
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
- A23K20/142—Amino acids; Derivatives thereof
- A23K20/147—Polymeric derivatives, e.g. peptides or proteins
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/80—Feeding-stuffs specially adapted for particular animals for aquatic animals, e.g. fish, crustaceans or molluscs
-
- 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
- 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
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- Life Sciences & Earth Sciences (AREA)
- Polymers & Plastics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Animal Husbandry (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Molecular Biology (AREA)
- Marine Sciences & Fisheries (AREA)
- Health & Medical Sciences (AREA)
- Biotechnology (AREA)
- Physiology (AREA)
- Environmental Sciences (AREA)
- Biomedical Technology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Biodiversity & Conservation Biology (AREA)
- Botany (AREA)
- Mycology (AREA)
- Insects & Arthropods (AREA)
- Birds (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses a kind of cultural method of river crab, bait is launched to aquaculture pond, is fed daily twice, the morning 8 ~ 9 point are fed 1 time, and afternoon 7 ~ 8 point are fed 1 time, and based on the feeding of afternoon, feeding volume accounts for the 60 ~ 70% of whole day；The square-shaped fishing net with poles as supports shape food platform made of plastic knitting bag webs or close eye mesh sheet is fed on bank and shoal Multipoint Uniform；It keeps aquaculture pond water quality thorough clearly, is oxygenated, transparency 30 ~ 50cm, dissolved oxygen 5mg/L or more, ammonia nitrogen ＜ 0.2mg/L, water body pH 6.5 ~ 8.5.The method for breeding river crab of the present invention improves the organoleptic quality of river crab, taste flavor, and to improve the economic benefit of pond crab farming, quality is suitable with Cultured In The Lake Pen river crab, but more safer than the river crab of Cultured In The Lake Pen and easy to operate, and easy to implement, cost is relatively low.
Description
Technical field
The present invention relates to aquaculture technical field, a kind of particularly cultural method of river crab.
Background technology
River crab is the maximum fresh water crab of China's yield, is unique flavor, one of aquatic products treasure full of nutrition.With society
The needs of the progress and vegetable basket project of meeting, produce meaning and economic benefit is fully affirmed.River crab edible part egg
White matter content is 14%, and contains a variety of amino acid, and fat content 5.9%, carbohydrate content 7%, vitamin is abundant, is
The hat of conventional aquatic products, it has also become the important aquaculture kind in the Yangtze river basin, culture of Chinese mitten crab yield is more than 59.3 ten thousand at present,
Cultured area also has further widened trend.
The lake depth of water is suitable, water plant riotous growth, superior natural conditions, is that river crab preferably fattens place and breeding spot,
But it is excessive due to lacking planning and many lake net envelope surface products of management measure, seriously resource is caused to fall sharply lake resource destruction,
In addition artificially extremely catching indiscriminate fishing, lake culture environment is affected.Also, after the Blue Algae Event of Taihu Lake, the scale of lake net differential method
It is strictly controlled, meanwhile, the consumption market of river crab is increasing, and therefore, pond culture scale expands rapidly.
Currently, the river crab of pond culture can compare favourably in terms of specification, yield with the river crab of lake culture, some is even
It is bigger than the river crab specification of Cultured In The Lake Pen, yield is high.But due to the limitation of pond ecological environment, imitate natural, ecological technology cultivation
River crab is still inferior to the river crab of Cultured In The Lake Pen in terms of organoleptic quality, is mainly manifested in the river crab cream of pond culture（Hepatopancrease）Color
Not bright-coloured enough, crab shell color is also relatively dim after being cooked, be not as so red as lake river crab；Also not as good as lake culture in terms of mouthfeel
River crab is so fresh, sweet tea, and the river crab market price is determined by its quality and specification, meanwhile, with the improvement of living standards, people couple
The demand of high-quality river crab is increasing, and therefore, a kind of new method for breeding river crab of research and development is effectively to promote pond culture river
The organoleptic quality of crab is necessary to the development for improving pond crab farming industry.
The quality of feed for river crab is also one of the key technology of culture of Chinese mitten crab success or failure.River crab nocturnalism is more, timid,
It ingests slow, feed is gripped with chela when ingesting, it is desirable that feed has certain degree of hardness, and because river crab oral cavity is surrounded by jaw, while eating feeding
Miss feed in material side.Therefore, preferable feed for river crab should have the following conditions：Palatability is good, and river crab love is eaten；Feed coefficient is low,
River crab eats like a bird, and grows fast；Resistance to bubble will not miss feed when river crab ingests, and reduce the waste of feed.
Invention content
The mesh of the present invention is to provide a kind of cultural method of river crab, to improve the cultivation quality and benefit of river crab.
The invention discloses a kind of cultural methods of river crab, launch bait to aquaculture pond, feed daily twice, the morning 8 ~ 9
Point is fed 1 time, and afternoon 7 ~ 8 point are fed 1 time, and based on the feeding of afternoon, feeding volume accounts for the 60 ~ 70% of whole day；Use Polywoven Bag
Square-shaped fishing net with poles as supports shape food platform made of piece or close eye mesh sheet is fed on bank and shoal Multipoint Uniform；Keep aquaculture pond water quality thorough clearly, oxygenation
Gas, transparency 30 ~ 50cm, dissolved oxygen 5mg/L or more, ammonia nitrogen ＜ 0.2mg/L, water body pH 6.5 ~ 8.5.
Bait formula is different and different because river crab growth phase；River crab early growth period, to feed animal bait
Based on, supplemented by arrange in pairs or groups vegetal bait and fortification bait；River crab growth medium is taken with feeding based on vegetal bait
With animal bait；River crab Later growth, to feed based on animal bait, supplemented by vegetal bait of arranging in pairs or groups；The animality
Bait includes carp summer flower, earthworm, meat mincing, fish meal, silkworm chrysalis, spiral shell class；The vegetal bait includes haematococcus pluvialis, spiral
Algae, soya bean, corn, carrot, malt, sweet potato；The fortification bait includes astaxanthin and protein powder.
It is different and different because of seasonal climate to change regimen condition；Spring, two season of autumn are to change within 7 ~ 10 days that water is primary, and quantity of exchanged water is
1/3；Summer is to change within 3 ~ 5 days that water is primary, and quantity of exchanged water is no more than 1/2；When changing water, water temperature difference≤5 DEG C inside and outside aquaculture pond, water intake velocity
It is subject to 2 ~ 3 hours and has changed water.
The depth of water is different and different because seasonal climate, the deep 1.3 ~ 1.5m of 3 ~ 4 moon pool levels；1 at 5 ~ July deep water ~
1.2m, 0.4 ~ 0.7m of shoal；1.6 ~ 1.8m, 0.9 ~ 1.5m of shoal at 8 ~ October deep water；1 ~ 1.2m, shallow water at November deep water
0.4 ~ 0.7m of place is advisable；The depth of water is maintained at 1.0 ~ 1.3m within 12 ~ 2 months.
Aquaculture pond presses 1/3 placement Eichhornia crassipes of the water surface, takes out extra outmoded part weekly.
Aquaculture pond was being carried out disinfection and rich water according to a conventional method using first 15 days, cultivated animal bait.
Aquaculture pond puts seedling initial stage, imposes organic fertilizer rich water；Top dressing inorganic fertilizer.
Within the culture of Chinese mitten crab phase, 10 ~ 15K of quick lime is monthly used per acre, and it is primary to soak lotion crab pond of splashing.
Compared with prior art, advantages of the present invention and generation good effect are：
The method for breeding river crab of the present invention improves the organoleptic quality of river crab, taste flavor, to improve the warp of pond crab farming
Ji benefit, quality is suitable with Cultured In The Lake Pen river crab, but more safer than the river crab of Cultured In The Lake Pen and easy to operate, easy to implement,
Cost is relatively low.
Specific implementation mode
Technical scheme of the present invention is described in detail with reference to embodiment：
Embodiment 1
A kind of cultural method of river crab is launched bait to aquaculture pond, is fed daily twice, and at 9 points in the morning feeds 1 time, 7 points of throwings in afternoon
It feeds 1 time, based on the feeding of afternoon, feeding volume accounts for the 60% of whole day；The square-shaped fishing net with poles as supports shape made of plastic knitting bag webs or close eye mesh sheet is eaten
Platform is fed on bank and shoal Multipoint Uniform；Keep aquaculture pond water quality it is thorough clearly, be oxygenated, transparency 30cm, dissolved oxygen 5mg/L with
On, ammonia nitrogen ＜ 0.2mg/L, water body pH 6.5.
Bait formula is different and different because river crab growth phase；River crab early growth period, to feed animal bait
Based on, supplemented by arrange in pairs or groups vegetal bait and fortification bait；River crab growth medium is taken with feeding based on vegetal bait
With animal bait；River crab Later growth, to feed based on animal bait, supplemented by vegetal bait of arranging in pairs or groups；The animality
Bait includes carp summer flower, earthworm, meat mincing, fish meal, silkworm chrysalis, spiral shell class；The vegetal bait includes haematococcus pluvialis, spiral
Algae, soya bean, corn, carrot, malt, sweet potato；The fortification bait includes astaxanthin and protein powder.
It is different and different because of seasonal climate to change regimen condition；Spring, two season of autumn are primary, the quantity of exchanged water 1/ that changes water for 7 days
3；Summer is to change within 3 days that water is primary, and quantity of exchanged water is no more than 1/2；When changing water, water temperature difference≤5 DEG C inside and outside aquaculture pond, early spring and early summer,
The water of change, water temperature are higher than water temperature in pond；Midsummer will change to the water less than water temperature in pond；It is higher that winter can not change to water temperature
Water, in order to avoid influencing suspend mode, water intake velocity, which is subject to 2 hours, has changed water.
The depth of water is different and different because seasonal climate, the deep 1.3 ~ 1.5m of 3 ~ 4 moon pool levels；1 at 5 ~ July deep water ~
1.2m, 0.4 ~ 0.7m of shoal；1.6 ~ 1.8m, 0.9 ~ 1.5m of shoal at 8 ~ October deep water；1 ~ 1.2m, shallow water at November deep water
0.4 ~ 0.7m of place is advisable；The depth of water is maintained at 1.0 ~ 1.3m within 12 ~ 2 months.
Aquaculture pond presses 1/3 placement Eichhornia crassipes of the water surface, takes out extra outmoded part weekly, just can so be formed enough
Water plant eco-environment zone be conducive to young crab attachment and the predation to planktonic organism so that river crab is hidden and inhabit, can
As a small amount of supplementary food.
Aquaculture pond was being carried out disinfection and rich water according to a conventional method using first 15 days, cultivated animal bait.
Aquaculture pond puts seedling initial stage, imposes chicken manure and Swine manure rich water；Top dressing inorganic fertilizer, 4mg/l nitrogenous fertilizer and
The ratio between 0.5mg/l phosphate fertilizer is 8:1, once every five days.
Within the culture of Chinese mitten crab phase, quick lime 10K is monthly used per acre, and it is primary to soak lotion crab pond of splashing, for killing germ
With expeling enemy, the required calcareous nutrition of supplement river crab growth.
It patrols aquaculture pond, looks into whether there is or not residual bait, whether settled day bait throwing in kind and quantity look into water quality water body 3 times a day
Normally, water time and quantity of exchanged water are changed surely, look into water body whether anoxic, if visibility reduce, if water is not descended after river crab is frightened, or under
It climbs up to come immediately after water.At dusk or the big quantity set of early morning river crab pool side on the bank, illustrate anoxic in water, it is necessary to change water or increasing immediately
Oxygen, whether normal, determine maintenance and reinforcement measure if looking into escaping-preventing facilities, looks into that whether there is or not enemies, takes precautions against method surely, has looked into disease-free crab and dead crab,
Surely remedial measure is prevented, also to check whether the active state of river crab is normal.
Embodiment 2
A kind of cultural method of river crab is launched bait to aquaculture pond, is fed daily twice, and 8 a.m. is fed 1 time, 8 points of throwings in afternoon
It feeds 1 time, based on the feeding of afternoon, feeding volume accounts for the 70% of whole day；The square-shaped fishing net with poles as supports shape made of plastic knitting bag webs or close eye mesh sheet is eaten
Platform is fed on bank and shoal Multipoint Uniform；Keep aquaculture pond water quality it is thorough clearly, be oxygenated, transparency 40cm, dissolved oxygen 5mg/L with
On, ammonia nitrogen ＜ 0.2mg/L, water body pH 7.5.
Bait formula is different and different because river crab growth phase；River crab early growth period, to feed animal bait
Based on, supplemented by arrange in pairs or groups vegetal bait and fortification bait；River crab growth medium is taken with feeding based on vegetal bait
With animal bait；River crab Later growth, to feed based on animal bait, supplemented by vegetal bait of arranging in pairs or groups；The animality
Bait includes carp summer flower, earthworm, meat mincing, fish meal, silkworm chrysalis, spiral shell class；The vegetal bait includes haematococcus pluvialis, spiral
Algae, soya bean, corn, carrot, malt, sweet potato；The fortification bait includes astaxanthin and protein powder.
It is different and different because of seasonal climate to change regimen condition；Spring, two season of autumn are primary, the quantity of exchanged water 1/ that changes water for 8 days
3；Summer is to change within 4 days that water is primary, and quantity of exchanged water is no more than 1/2；When changing water, water temperature difference≤5 DEG C inside and outside aquaculture pond, early spring and early summer,
The water of change, water temperature are higher than water temperature in pond；Midsummer will change to the water less than water temperature in pond；It is higher that winter can not change to water temperature
Water, in order to avoid influencing suspend mode, water intake velocity, which is subject to 3 hours, has changed water.
The depth of water is different and different because seasonal climate, the deep 1.3 ~ 1.5m of 3 ~ 4 moon pool levels；1 at 5 ~ July deep water ~
1.2m, 0.4 ~ 0.7m of shoal；1.6 ~ 1.8m, 0.9 ~ 1.5m of shoal at 8 ~ October deep water；1 ~ 1.2m, shallow water at November deep water
0.4 ~ 0.7m of place is advisable；The depth of water is maintained at 1.0 ~ 1.3m within 12 ~ 2 months.
Aquaculture pond presses 1/3 placement Eichhornia crassipes of the water surface, takes out extra outmoded part weekly, just can so be formed enough
Water plant eco-environment zone be conducive to young crab attachment and the predation to planktonic organism so that river crab is hidden and inhabit, can
As a small amount of supplementary food.
Aquaculture pond was being carried out disinfection and rich water according to a conventional method using first 15 days, cultivated animal bait.
Aquaculture pond puts seedling initial stage, imposes chicken manure and Swine manure rich water；Top dressing inorganic fertilizer, 4mg/l nitrogenous fertilizer and
The ratio between 0.5mg/l phosphate fertilizer is 9:1, once every five days.
Within the culture of Chinese mitten crab phase, quick lime 12K is monthly used per acre, and it is primary to soak lotion crab pond of splashing, for killing germ
With expeling enemy, the required calcareous nutrition of supplement river crab growth.
It patrols aquaculture pond, looks into whether there is or not residual bait, whether settled day bait throwing in kind and quantity look into water quality water body 2 times a day
Normally, water time and quantity of exchanged water are changed surely, look into water body whether anoxic, if visibility reduce, if water is not descended after river crab is frightened, or under
It climbs up to come immediately after water.At dusk or the big quantity set of early morning river crab pool side on the bank, illustrate anoxic in water, it is necessary to change water or increasing immediately
Oxygen, whether normal, determine maintenance and reinforcement measure if looking into escaping-preventing facilities, looks into that whether there is or not enemies, takes precautions against method surely, has looked into disease-free crab and dead crab,
Surely remedial measure is prevented, also to check whether the active state of river crab is normal.
Embodiment 3
A kind of cultural method of river crab is launched bait to aquaculture pond, is fed daily twice, and at 9 points in the morning feeds 1 time, 7 points of throwings in afternoon
It feeds 1 time, based on the feeding of afternoon, feeding volume accounts for the 70% of whole day；The square-shaped fishing net with poles as supports shape made of plastic knitting bag webs or close eye mesh sheet is eaten
Platform is fed on bank and shoal Multipoint Uniform；Keep aquaculture pond water quality it is thorough clearly, be oxygenated, transparency 50cm, dissolved oxygen 5mg/L with
On, ammonia nitrogen ＜ 0.2mg/L, water body pH 8.5.
Bait formula is different and different because river crab growth phase；River crab early growth period, to feed animal bait
Based on, supplemented by arrange in pairs or groups vegetal bait and fortification bait；River crab growth medium is taken with feeding based on vegetal bait
With animal bait；River crab Later growth, to feed based on animal bait, supplemented by vegetal bait of arranging in pairs or groups；The animality
Bait includes carp summer flower, earthworm, meat mincing, fish meal, silkworm chrysalis, spiral shell class；The vegetal bait includes haematococcus pluvialis, spiral
Algae, soya bean, corn, carrot, malt, sweet potato；The fortification bait includes astaxanthin and protein powder.
It is different and different because of seasonal climate to change regimen condition；Spring, two season of autumn are primary, the quantity of exchanged water 1/ that changes water for 10 days
3；Summer is to change within 5 days that water is primary, and quantity of exchanged water is no more than 1/2；When changing water, water temperature difference≤5 DEG C inside and outside aquaculture pond, early spring and early summer,
The water of change, water temperature are higher than water temperature in pond；Midsummer will change to the water less than water temperature in pond；It is higher that winter can not change to water temperature
Water, in order to avoid influencing suspend mode, water intake velocity, which is subject to 2 hours, has changed water.
The depth of water is different and different because seasonal climate, the deep 1.3 ~ 1.5m of 3 ~ 4 moon pool levels；1 at 5 ~ July deep water ~
1.2m, 0.4 ~ 0.7m of shoal；1.6 ~ 1.8m, 0.9 ~ 1.5m of shoal at 8 ~ October deep water；1 ~ 1.2m, shallow water at November deep water
0.4 ~ 0.7m of place is advisable；The depth of water is maintained at 1.0 ~ 1.3m within 12 ~ 2 months.
Aquaculture pond presses 1/3 placement Eichhornia crassipes of the water surface, takes out extra outmoded part weekly, just can so be formed enough
Water plant eco-environment zone be conducive to young crab attachment and the predation to planktonic organism so that river crab is hidden and inhabit, can
As a small amount of supplementary food.
Aquaculture pond was being carried out disinfection and rich water according to a conventional method using first 15 days, cultivated animal bait.
Aquaculture pond puts seedling initial stage, imposes chicken manure and Swine manure rich water；Top dressing inorganic fertilizer, 4mg/l nitrogenous fertilizer and
The ratio between 0.5mg/l phosphate fertilizer is 10:1, once every five days.
Within the culture of Chinese mitten crab phase, quick lime 15K is monthly used per acre, and it is primary to soak lotion crab pond of splashing, for killing germ
With expeling enemy, the required calcareous nutrition of supplement river crab growth.
At least 1-2 times inspection aquaculture pond daily, is looked into whether there is or not residual bait, settled day bait throwing in kind and quantity look into water quality water
Whether body normal, changes water time and quantity of exchanged water surely, look into water body whether anoxic, if visibility reduce, if after river crab is frightened not under
It climbs up and immediately after water or lower water.At dusk or the big quantity set of early morning river crab pool side on the bank, illustrate anoxic in water, it is necessary to change immediately
Water or oxygenation, whether normal, determine maintenance and reinforcement measure if looking into escaping-preventing facilities, looks into that whether there is or not enemies, takes precautions against method surely, looked into disease-free crab and
Dead crab prevents remedial measure surely, also to check whether the active state of river crab is normal.
Above-described embodiment is only the more excellent embodiment of the present invention, every according to the technical essence of the invention to implementing above
Any simple modification, modification and the alternate variation that example is made, belong in the range of technical solution of the present invention.
Claims (8)
1. a kind of cultural method of river crab, which is characterized in that launch bait to aquaculture pond, feed daily twice, the morning 8 ~ 9 point are thrown
It feeds 1 time, afternoon 7 ~ 8 point are fed 1 time, and based on the feeding of afternoon, feeding volume accounts for the 60 ~ 70% of whole day；With plastic knitting bag webs or
Square-shaped fishing net with poles as supports shape food platform made of close eye mesh sheet is fed on bank and shoal Multipoint Uniform；It keeps aquaculture pond water quality thorough clearly, is oxygenated, thoroughly
Lightness 30 ~ 50cm, dissolved oxygen 5mg/L or more, ammonia nitrogen ＜ 0.2mg/L, water body pH 6.5 ~ 8.5.
2. a kind of cultural method of river crab according to claim 1, which is characterized in that bait formula is because of river crab growth phase
It is different and different；River crab early growth period, to feed based on animal bait, arrange in pairs or groups vegetal bait and fortification
Supplemented by bait；River crab growth medium, to feed based on vegetal bait, animal bait of arranging in pairs or groups；River crab Later growth, to feed
Based on animal bait, supplemented by vegetal bait of arranging in pairs or groups；The animal bait include carp summer flower, earthworm, meat mincing, fish meal,
Silkworm chrysalis, spiral shell class；The vegetal bait includes haematococcus pluvialis, spirulina, soya bean, corn, carrot, malt, sweet potato；Institute
It includes astaxanthin and protein powder to state fortification bait.
3. a kind of cultural method of river crab according to claim 2, which is characterized in that change regimen condition because of seasonal climate not
It is same and different；Spring, two season of autumn are primary, the quantity of exchanged water 1/3 that changes water for 7 ~ 10 days；Summer is primary, the quantity of exchanged water that changes water for 3 ~ 5 days
No more than 1/2；When changing water, water temperature difference≤5 DEG C inside and outside aquaculture pond, water intake velocity, which is subject to 2 ~ 3 hours, has changed water.
4. a kind of cultural method of river crab according to claim 3, which is characterized in that the depth of water is due to the difference of seasonal climate
It is different, the deep 1.3 ~ 1.5m of 3 ~ 4 moon pool levels；1 ~ 1.2m, 0.4 ~ 0.7m of shoal at 5 ~ July deep water；8 ~ October deep water
Locate 1.6 ~ 1.8m, 0.9 ~ 1.5m of shoal；1 ~ 1.2m, 0.4 ~ 0.7m of shoal are advisable at November deep water；The depth of water is kept within 12 ~ 2 months
In 1.0 ~ 1.3m.
5. a kind of cultural method of river crab according to claim 4, which is characterized in that aquaculture pond presses 1/3 placement of the water surface
Eichhornia crassipes takes out weekly extra outmoded part.
6. a kind of cultural method of river crab according to claim 5, which is characterized in that aquaculture pond is pressed often using first 15 days
Rule method carries out disinfection and rich water, cultivates animal bait.
7. a kind of cultural method of river crab according to claim 6, which is characterized in that aquaculture pond puts seedling initial stage, has imposed
The fat water of machine；Top dressing inorganic fertilizer.
8. a kind of cultural method of river crab according to claim 7, which is characterized in that within the culture of Chinese mitten crab phase, monthly often
Mu 10 ~ 15K of quick lime, it is primary to soak lotion crab pond of splashing.
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