CN104094884A - High-density young crab culture method - Google Patents

High-density young crab culture method Download PDF

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Publication number
CN104094884A
CN104094884A CN201410377955.9A CN201410377955A CN104094884A CN 104094884 A CN104094884 A CN 104094884A CN 201410377955 A CN201410377955 A CN 201410377955A CN 104094884 A CN104094884 A CN 104094884A
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water
pond
crab
days
young
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CN201410377955.9A
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CN104094884B (en
Inventor
裴治军
施培来
袁怀波
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HUAINAN SHIJIAHU AQUATIC PRODUCT CULTURE CENTER
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HUAINAN SHIJIAHU AQUATIC PRODUCT CULTURE CENTER
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish

Abstract

The invention discloses a high-density young crab culture method. The method comprises the following steps: (1) preparing a pond in which the water depth is 80-100 centimeters, planting eel grass at the bottom of the pond, and planting float grass on the water surface; (2) stocking young crabs at the stocking density of 1.8-2.1kg/mu; (3) feeding, wherein the young crabs are fed by freely eating float grass, and a complete compound expanded granulated feed added with saccharicterpenin and wheat bran are fed; (4) regulating and controlling the water quality and substrate, applying a biological substrate modifier and a microbial water improving agent; maintaining dissolved oxygen in water at 4-6mg/L; raising the water level by 9-11cm once the young crabs shuck; changing water once every 5-10 days in May and June, and changing water once every 2-5 days after July. By culturing young crabs under a high-density stocking condition, 300-350 kilograms of high-quality larval crabs (160-180 crabs per kilogram) can be produced per mu, the larval crabs grow robustly and have superior immunity and adaptability, the sexual precocity rate can be effectively controlled below 3 percent, and the larval crab yield of a unit water body can be increased effectively.

Description

High density children crab cultural method
Technical field
The present invention relates to aquaculture field, relate in particular to a kind of high density children crab cultural method.
Background technology
River crab belongs to high shellfish, and under nature, young crab will be formed commodity crab and generally be wanted just can complete 2-3 ages in autumn.The key of culture of Chinese mitten crab is the cultivation of young crab, and whether young crab cultivates science, is to obtain one of highly efficient and productive precondition.Relevant with pond environment condition, feedstuff feeding, water quality management, breeding technology etc. because of young crab breeding density, so will reasonably put young crab in a suitable place to breed, breeding density is suitable, and ontogeny is neat, weightening finish multiple is large; Breeding density is too high, and ontogeny is slow, weightening finish multiple is little, Individual Size is greatly different, survival rate is low, specification is less than normal.Therefore, in current young crab cultivation, mostly adopt lower breeding density.Producing at present the basic parameter that above young crab is put in a suitable place to breed is: the input density of young crab (megalops larva) is 1.2-1.5 kgs/acre, at the bottom of pond, pasture and water half cover, water surface pasture and water cover degree is 2/5 left and right, common full price coordinates expanded pellet feed freely to feed, 150 kilograms of button crabs of per mu yield (160-180/kg), sex premature rate 5%.
Therefore, be badly in need of the young crab cultural method that a kind of breeding density is high, ontogeny is fast, specification is large, output is high, sex premature rate is low.
Summary of the invention
Technical problem to be solved by this invention is to provide the high density children crab cultural method that a kind of breeding density is high, ontogeny is fast, specification is large, output is high, sex premature rate is low.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: high density children crab cultural method, comprises the following steps:
(1) prepare in pond
Select pond, desilting is carried out in pond and disinfect, arrange and prevent escaping purse seine, tiling at the bottom of pond, and in pond, be installed into drainage system, nano oxygen enriching equipment and cleaning equipment, the pond depth of water 80-100cm; First 5-9 days of the pool under children crab, plantation eel grass at the bottom of pond at the bottom of requiring eel grass to cover pond, is transplanted floatability pasture and water at the water surface comprehensively, requires the transplanting area of floatability pasture and water in total the more than 3/5 of water surface area;
(2) young crab is put in a suitable place to breed
May in the ratio of 1.8-2.1 kgs/acre to the disposable young crab of putting megalopa stage in a suitable place to breed in pond;
(3) feedstuff feeding
Children crab bait freely to take food pasture and water as main, and 5-June throw something and feed be added with saccharicter-penin full price coordinate expanded pellet feed, the adding proportion of saccharicter-penin is 0.5-0.7g/kg, day a feeding volume be: 1.5-2% of crab body gross weight; The wheat bran of throwing something and feeding after July, day feeding volume is: 7-August crab body gross weight 5-8%, crab body gross weight more than 10% after September;
(4) water quality and substrate regulation and control
Using the biological end every 15-20 days changes agent once, uses microorganism modify-water agent once every 15-20 days; Maintain content of oxygen dissolved in water at 4-6mg/L by nano oxygen enriching equipment; Before the first tenday period of a month in May, kept depth of water 0.5m, young crab often sloughs off 1 shell water level increases by 9-11cm, until water level reaches 1.5-1.6m; Changed water 1 5-June every 5-10 days, after July, change water 1 time every 2-5 days.
Described floatability pasture and water are the floatability pasture and water such as water peanut, weter hyacinth, duckweed.
It is on the market common steamed crab manufactured feed that described full price coordinates expanded pellet feed.
It is calper calcium peroxide or zeolite etc. that the described biological end changes agent, and the biological end changes agent and throws oxygenation rapidly in people's water, promotes nitrification, reduce the content of ammonia nitrogen in water, nitrite, sulphide, can also supplement the required calcium of biological growth, and make substrate loose ventilative, impel organic decomposition completely.
Described microorganism modify-water agent is photosynthetic bacteria and nitrifying bacteria.Photosynthetic bacteria: due to factors such as the surplus accumulation of highdensity cultivating condition, bait, young crab excretas, cause organic matter overheap at the bottom of pond, when microorganism is by organic matter decomposition at the bottom of pond, can discharge the material harmful to young crab, as ammonia, nitrous acid and hydrogen sulphide etc.Photosynthetic bacteria can be absorbed organic and hydrogen sulphide, makes for want of nutrition of aerobic microorganism and is suppressed, and reduces the chance that Toxic decomposition occurs, and water quality is purified like this, thereby is conducive to the growth of young crab.Nitrifying bacteria: nitrifying bacteria can constantly consume the ammonia producing because of young crab metabolism in pond, and the increase of ammonia concentration is harmful even fatal for young crab, the use of nitrifying bacteria has the effect that maintains water ecosystem stability.
The present invention, to forming by the end of November button crab, raises the middle and later periods since July.
The present invention is all standing plantation eel grass at the bottom of pond, the cover degree of Waterbourne pasture and water is not less than 3/5, by increasing pasture and water cultivated area and cover degree, can perch for young crab provides daily on the one hand, hidden place, there is important impact to purifying water and reducing water temperature on the other hand.The present invention has added saccharicter-penin in the special full price of commercially available crab coordinates expanded pellet feed, saccharicter-penin has the effect that improves young crab neuro-endocrine-immunoregulatory, disease-resistant, anti-stress ability, and can promote protein to synthesize, improve digestive enzyme activity, improves young crab daily gain and reduce feed coefficient.
Water quality, water temperature and growth rate are the key factors that affects neoteny of young crab rate, the present invention changes agent by the biological end, the use of microorganism modify-water agent and nano oxygen enriching equipment, and along with young crab shells and the control mode of increase depth of water, increase water quality, reduce water salinity, feed wheat bran and freely take food pasture and water by stop using the full price cooperation expanded pellet feed that contains protein to change since July, make young crab in Ban Ji Russia its growth rate of state control, and after July, increase and changed waterside number, can reduce like this water temperature and further reduce water salinity, the present invention is by the comprehensive raising condition of implementing above several respects, thereby reach the object of controlling neoteny of young crab rate, put the effect itself just in situation with the precocious rate of lowering in a suitable place to breed in high density simultaneously, in conjunction with pasture and water, water quality, scale of feeding, the control of the conditions such as water temperature, the present invention can effectively control neoteny of young crab below 3%.
The present invention adopts the highdensity condition of putting in a suitable place to breed to raise young crab, by increasing full plantation eel grass at the bottom of the cover degree, pond of floatability pasture and water, control scale of feeding, adjust feed formula, control the comprehensive utilization of the technology such as water temperature and micro-pore oxygenation, can realize 300-350 kilograms of high-quality button crabs of per mu yield (160-180/kg), and button crab robust growth, immunity and the adaptive capacity of gained are all good, can effectively improve the button crab output of unit of water body, thereby produce active influence to promoting breeding enterprise economic benefit and social benefit.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
High density children crab cultural method, comprises the following steps:
(1) prepare in pond
Select pond, desilting is carried out in pond and disinfect, arrange and prevent escaping purse seine, tiling at the bottom of pond, and in pond, be installed into drainage system, nano oxygen enriching equipment and cleaning equipment, pond depth of water 90cm; First 5 days of the pool under children crab, plantation eel grass at the bottom of pond at the bottom of requiring eel grass to cover pond, is transplanted floatability pasture and water at the water surface comprehensively, and the transplanting area that requires floatability pasture and water is total water surface area 4/5;
(2) young crab is put in a suitable place to breed
May in the ratio of 2 kgs/acre to the disposable young crab of putting megalopa stage in a suitable place to breed in pond;
(3) feedstuff feeding
Children crab bait freely to take food pasture and water as main, and 5-June throw something and feed be added with saccharicter-penin full price coordinate expanded pellet feed, the adding proportion of saccharicter-penin is 0.6g/kg, day a feeding volume be: 1.5% of crab body gross weight; The wheat bran of throwing something and feeding after July, day feeding volume is: 7-August crab body gross weight 6.5%, after September 10% of crab body gross weight;
(4) water quality and substrate regulation and control
Used quicklime 1 time every 15 days, quicklime consumption is 12.5g/m3; Used photosynthetic bacteria and nitrifying bacteria every 17 days respectively once, photosynthetic bacteria consumption is 1.5g photosynthetic bacteria/m3 water body, and nitrifying bacteria consumption is 0.12ml bacterial digestion stoste/m3 water body, keeps water transparency at 30cm-50cm; Maintain content of oxygen dissolved in water at 5mg/L by nano oxygen enriching equipment; Before the first tenday period of a month in May, kept depth of water 0.5m, young crab often sloughs off 1 shell water level increases 10cm, until water level reaches 1.5m; Changed water 1 time every 7 days 5-June, after July, changed water 1 time every 2 days.
Embodiment 2
High density children crab cultural method, comprises the following steps:
(1) prepare in pond
Select pond, desilting is carried out in pond and disinfect, arrange and prevent escaping purse seine, tiling at the bottom of pond, and in pond, be installed into drainage system, nano oxygen enriching equipment and cleaning equipment, pond depth of water 100cm; First 9 days of the pool under children crab, plantation eel grass at the bottom of pond at the bottom of requiring eel grass to cover pond, is transplanted floatability pasture and water at the water surface comprehensively, and the transplanting area that requires floatability pasture and water is total water surface area 3/5;
(2) young crab is put in a suitable place to breed
May in the ratio of 2.1 kgs/acre to the disposable young crab of putting megalopa stage in a suitable place to breed in pond; (3) feedstuff feeding
Children crab bait freely to take food pasture and water as main, and 5-June throw something and feed be added with saccharicter-penin full price coordinate expanded pellet feed, the adding proportion of saccharicter-penin is 0.5g/kg, day a feeding volume be: 2% of crab body gross weight; The wheat bran of throwing something and feeding after July, day feeding volume is: 7-August crab body gross weight 8%, after September 11% of crab body gross weight;
(4) water quality and substrate regulation and control
Used quicklime 1 time every 17 days, quicklime consumption is 10g/m3; Used photosynthetic bacteria and nitrifying bacteria every 20 days respectively once, photosynthetic bacteria consumption is 2g photosynthetic bacteria/m3 water body, and nitrifying bacteria consumption is 0.1ml bacterial digestion stoste/m3 water body, keeps water transparency at 30cm-50cm; Maintain content of oxygen dissolved in water at 4mg/L by nano oxygen enriching equipment; Before the first tenday period of a month in May, kept depth of water 0.5m, young crab often sloughs off 1 shell water level increases 11cm, until water level reaches 1.6m; Changed water 1 time every 5 days 5-June, after July, changed water 1 time every 5 days.
Embodiment 3
High density children crab cultural method, comprises the following steps:
(1) prepare in pond
Select pond, desilting is carried out in pond and disinfect, arrange and prevent escaping purse seine, tiling at the bottom of pond, and in pond, be installed into drainage system, nano oxygen enriching equipment and cleaning equipment, pond depth of water 80cm; First 7 days of the pool under children crab, plantation eel grass at the bottom of pond at the bottom of requiring eel grass to cover pond, is transplanted floatability pasture and water at the water surface comprehensively, and the transplanting area that requires floatability pasture and water is total water surface area 9/10;
(2) young crab is put in a suitable place to breed
May in the ratio of 1.8 kgs/acre to the disposable young crab of putting megalopa stage in a suitable place to breed in pond; (3) feedstuff feeding
Children crab bait freely to take food pasture and water as main, and 5-June throw something and feed be added with saccharicter-penin full price coordinate expanded pellet feed, the adding proportion of saccharicter-penin is 0.7g/kg, day a feeding volume be: 1.7% of crab body gross weight; The wheat bran of throwing something and feeding after July, day feeding volume is: 7-August crab body gross weight 5%, after September 12% of crab body gross weight;
(4) water quality and substrate regulation and control
Used quicklime 1 time every 20 days, quicklime consumption is 15g/m3; Used photosynthetic bacteria and nitrifying bacteria every 15 days respectively once, photosynthetic bacteria consumption is lg photosynthetic bacteria/m3 water body, and nitrifying bacteria consumption is 0.15ml bacterial digestion stoste/m3 water body, keeps water transparency at 30cm-50cm; Maintain content of oxygen dissolved in water at 6mg/L by nano oxygen enriching equipment; Before the first tenday period of a month in May, kept depth of water 0.5m, young crab often sloughs off 1 shell water level increases 9cm, until water level reaches 1.6m; Changed water 1 time every 10 days 5-June, after July, changed water 1 time every 3 days.
Floatability pasture and water described in above-described embodiment are water peanut, weter hyacinth or duckweed.
It is on the market common steamed crab manufactured feed that full price described in above-described embodiment coordinates expanded pellet feed, as 183 type steamed crab manufactured feeds (Jiangsu Kangda Forage Co., Ltd., Huaian).
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (1)

1. high density children crab cultural method, comprises the following steps:
(1) prepare in pond
Select pond, desilting is carried out in pond and disinfect, arrange and prevent escaping purse seine, tiling at the bottom of pond, and in pond, be installed into drainage system, nano oxygen enriching equipment and cleaning equipment, the pond depth of water 80-100cm; First 5-9 days of the pool under children crab, plantation eel grass at the bottom of pond at the bottom of requiring eel grass to cover pond, is transplanted floatability pasture and water at the water surface comprehensively, requires the transplanting area of floatability pasture and water in total the more than 3/5 of water surface area;
(2) young crab is put in a suitable place to breed
May in the ratio of 1.8-2.1 kgs/acre to the disposable young crab of putting megalopa stage in a suitable place to breed in pond;
(3) feedstuff feeding
Children crab bait freely to take food pasture and water as main, and 5-June throw something and feed be added with saccharicter-penin full price coordinate expanded pellet feed, the adding proportion of saccharicter-penin is 0.5-0.7g/kg, day a feeding volume be: 1.5-2% of crab body gross weight; The wheat bran of throwing something and feeding after July, day feeding volume is: 7-August crab body gross weight 5-8%, crab body gross weight more than 10% after September;
(4) water quality and substrate regulation and control
Using the biological end every 15-20 days changes agent once, uses microorganism modify-water agent once every 15-20 days; Maintain content of oxygen dissolved in water at 4-6mg/L by nano oxygen enriching equipment; Before the first tenday period of a month in May, kept depth of water 0.5m, young crab often sloughs off 1 shell water level increases by 9-11cm, until water level reaches 1.5-1.6m; Changed water 1 5-June every 5-10 days, after July, change water 1 time every 2-5 days.
CN201410377955.9A 2014-08-02 2014-08-02 High density children crab cultural method Expired - Fee Related CN104094884B (en)

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Publication number Priority date Publication date Assignee Title
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CN103548724A (en) * 2013-10-18 2014-02-05 叶建生 River crab integrated culture method in ponds
CN103688882A (en) * 2013-12-09 2014-04-02 兴化市板桥故里水产品养殖有限公司 High-density crab cultivating method
CN103734043A (en) * 2013-12-09 2014-04-23 兴化市板桥故里水产品养殖有限公司 High-density crab seed breeding method
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Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101023739A (en) * 2006-02-20 2007-08-29 王惠良 Method for culturing seedling of Chinese mitten crab eriocheir sinensis
CN103314902A (en) * 2013-06-17 2013-09-25 苏州市阳澄湖现代农业发展有限公司 Efficient breeding method for river crabs in pollution-free pond
CN103548724A (en) * 2013-10-18 2014-02-05 叶建生 River crab integrated culture method in ponds
CN103688882A (en) * 2013-12-09 2014-04-02 兴化市板桥故里水产品养殖有限公司 High-density crab cultivating method
CN103734043A (en) * 2013-12-09 2014-04-23 兴化市板桥故里水产品养殖有限公司 High-density crab seed breeding method
CN103931537A (en) * 2014-05-14 2014-07-23 王和绥 Crab breeding method

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
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汤宁: "施家湖螃蟹高效培育技术通过省级科技成果鉴定", 《淮南报业新闻网》, 20 December 2012 (2012-12-20), pages 2 - 3 *
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