CN102187837B - Industrially breeding method of macrobrachium nipponense - Google Patents

Abstract

The invention provides an industrially breeding method of macrobrachium nipponense, comprising the steps of: selection of parent macrobrachium of macrobrachium nipponense, cultivation of fingerlings, treatment of fingerling cultivation water quality, daily cultivation management in the breeding period and the like. By use of the industrially breeding method of macrobrachium nipponense, provided by the invention, the cultured macrobrachium nipponense fingerlings have high survival rate and stable quality. According to the industrially breeding method disclosed by the invention, the problems of low survival rate and unstable quality in the conventional macrobrachium nipponense breeding process can be solved, and the economic loss of the macrobrachium culturists can be reduced.

Description

A kind of Japanese macrobrachium supernbum factorial seedling-culturing method

Technical field

The present invention relates generally to the method for shrimps genetic breeding., particularly relate to a kind of a kind of method of Japanese macrobrachium supernbum factorial seedling growth.

Background technology:

Japanese macrobrachium supernbum has another name called freshwater shrimp, it is the main Freshwater shrimps kind of current China cultivation, because freshwater shrimp natural resources reduces increasingly, the market price rises year by year, and the seedling great majority of freshwater shrimp are that Tu Chi cultivates at present, cause seedling emergence rate low, quality is unstable, survives rate variance in process of growth, problem that growth rate is slow etc., therefore, in the urgent need to a kind of new freshwater shrimp factorial seedling growth mode.

Summary of the invention:

The invention provides a kind of a kind of method of Japanese macrobrachium supernbum factorial seedling growth, the inventive method has overcome that the seedling emergence rate existing in existing breeding method is low, and quality is unstable, and in process of growth, survival rate is not high, the defect that growth rate is slow.

The present invention adopts following technical scheme for achieving the above object:

A Japanese macrobrachium supernbum factorial seedling-culturing method, is characterized in that comprising the following steps:

(1) selection in brackish water pond and processing: selecting a plurality of areas is 250-350m ², the dark 1.5-1.8m in pond Tu Chi as brackish water pond, the water of crossing through 70-80 order silk cover filtering is put into pond, pond depth of water 1.5m, one, aerator is joined in each pond, four jiaos of the pond waters surface are placed the screen cloth that water peanuts and bamboo cane tie up and are made things concealed;

(2) close shrimp is chosen: the size of selecting in different water systems is even, and energetic, healthy female, male shrimp is as close shrimp, more than the long 3.5cm of female shrimp body; More than the long 4cm of male shrimp body;

(3) the raising pretreatment of close shrimp: female, the male shrimp of the same water system that step (2) is chosen separately, then, by the female shrimp of different water systems and male shrimp, is put into same brackish water pond and raises;

(4) close shrimp is raised: every morning and afternoon respectively throw something and feed once, and the manufactured feed of throwing something and feeding the morning accounts for the 2-3% that raises close shrimp body weight, and the fresh small fish of throwing something and feeding afternoon accounts for the 3-4% that raises close shrimp body weight; In pond, add fresh water 30-55m every day ³;

(5) nursery pond requires: select the indoor cement pit of 3m * 4m * 1.2m as nursery pond, lay gas stone in pond, gas stone density is 8-10/m2, and nursery pond top covers movably puggaree, for regulating illumination;

(6) nursery pond water quality is processed: before growing seedlings and starting, need sterilize thoroughly to nursery pond, will be after 80 order nets, then pass through fine sand, and the water after activated carbon filtration enters the nursery pond of sterilizing, and water level is used 30 milliliters/meter after reaching requirement again ³formalin is processed water for larval nursing 22-26 hour, and then aeration 2-3 days, finally adds chitin, makes concentration in its pool water within reach 0.8-1 gram/meter ³;

(7) observe the mating of close shrimp: the mating situation of routine observation brackish water pond Prawn, after female shrimp oogenesis, check ovum grain developmental state, when ovum grain bleach, move into nursery pond, close shrimp enters before pond with 20 milliliters/meter ³betagen Solution soak 1-2 minute;

(8) larval culture: after female shrimp ovulation, shift out nursery pond, the hatching density of ovum should not be too high, is generally 30 * 10 ⁴grain～80 * 10 ⁴grain/rice ³, when the young is during at I～III phase zoea, take Micro Algae as main; When larval growth, to IV～VII, during the phase, take wheel animalcule as main, every tail prawn young is thrown something and fed 20～100/day, and throw something and feed 7-9 every day;

(9) daily management of nursery pond: change water 2-5m every day ³, keep water body pH 7.8～8.6, more than dissolved oxygen 4 mg/litre, below chemical oxygen consumption (COC) 5 mg/litre, below total ammonia nitrogen 0.5 mg/litre, below nitrite 0.1 mg/litre, use effective microorganism preparation to make water quality keep good.

Beneficial effect of the present invention:

Adopt Japanese macrobrachium supernbum factorial seedling-culturing method of the present invention to grow seedlings, shrimp survival rate of seedling is high, cultivate shrimp seed steady quality, overcome in current Japanese macrobrachium supernbum seedling raising process survival rate low, the unsettled difficult problem of quality, solve the nonsynchronous problem of growth of the freshwater shrimp young in seedling rearing in earth ponds simultaneously, reduced the economic loss of foster shrimp dealer.

Embodiment

A Japanese macrobrachium supernbum factorial seedling-culturing method, comprises the following steps:

(1) selection in brackish water pond and processing: selecting a plurality of areas is 300m ², the dark 1.5m in pond Tu Chi as brackish water pond, the water of crossing through 80 order silk cover filterings is put into pond, one, aerator is joined in each pond, four jiaos of the pond waters surface are placed the screen cloth that water peanuts and bamboo cane tie up and are made things concealed;

(2) close shrimp is chosen: the size of selecting in different water systems is even, and energetic, healthy female, male shrimp is as close shrimp, more than the long 3.5cm of female shrimp body; More than the long 4cm of male shrimp body;

(3) the raising pretreatment of close shrimp: female, the male shrimp of the same water system that step (2) is chosen separately, then, by the female shrimp of different water systems and male shrimp, is put into same brackish water pond and raises;

(4) close shrimp is raised: every morning and afternoon respectively throw something and feed once, and the manufactured feed of throwing something and feeding the morning accounts for raises 2% of close shrimp body weight, and the fresh small fish of throwing something and feeding afternoon accounts for raises 4% of close shrimp body weight; In pond, add fresh water 35m every day ³:

(5) nursery pond requires: select the indoor cement pit of 3m * 4m * 1.2m as nursery pond, lay gas stone in pond, gas stone density is 9/m2, and nursery pond top covers movably puggaree, for regulating illumination;

(6) nursery pond water quality is processed: before growing seedlings and starting, need sterilize thoroughly to nursery pond, will be after 80 order nets, then pass through fine sand, and the water after activated carbon filtration enters the nursery pond of sterilizing, and water level is used 30 milliliters/meter after reaching requirement again ³formalin is processed water for larval nursing 24 hours, and then aeration 2 days, finally adds chitin, makes concentration in its pool water within reach 0.8-1 gram/meter ³;

(7) observe the mating of close shrimp: the mating situation of routine observation brackish water pond Prawn, after female shrimp oogenesis, check ovum grain developmental state, when ovum grain bleach, move into nursery pond, close shrimp enters before pond with 20 milliliters/meter ³betagen Solution soak 1 minute;

(8) larval culture: after female shrimp ovulation, shift out nursery pond, the hatching density of ovum should not be too high, is generally 30 * 10 ⁴grain～80 * 10 ⁴grain/rice ³, when the young is during at I～III phase zoea, take Micro Algae as main; When larval growth, to IV～VII, during the phase, take wheel animalcule as main, every tail prawn young is thrown something and fed 20～100/day, throws something and feeds every day 8 times;

(9) daily management of nursery pond: change water 3m every day ³, keep water body pH 7.8～8.6, more than dissolved oxygen 4 mg/litre, below chemical oxygen consumption (COC) 5 mg/litre, below total ammonia nitrogen 0.5 mg/litre, below nitrite 0.1 mg/litre, use effective microorganism preparation to make water quality keep good.

Employing the inventive method is grown seedlings, and the survival rate of shrimp seedling brings up to 37% by 10% of traditional seedling rearing in earth ponds, has solved the nonsynchronous problem of growth of the freshwater shrimp young in seedling rearing in earth ponds simultaneously.

Claims (1)

1. a Japanese macrobrachium supernbum factorial seedling-culturing method, is characterized in that comprising the following steps:

(1) selection in brackish water pond and processing: selecting a plurality of areas is 250-350m ², the dark 1.5-1.8m in pond Tu Chi as brackish water pond, the water of crossing through 70-80 order silk cover filtering is put into pond, pond depth of water 1.5m, one, aerator is joined in each pond, four jiaos of the pond waters surface are placed the screen cloth that water peanuts and bamboo cane tie up and are made things concealed;

(2) close shrimp is chosen: the size of selecting in different water systems is even, and energetic, healthy female, male shrimp is as close shrimp, more than the long 3.5cm of female shrimp body, more than the long 4cm of male shrimp body;

(3) the raising pretreatment of close shrimp: by female, the male shrimp of the same water system of choosing separately, then, by the female shrimp of different water systems and male shrimp, put into same brackish water pond and raise;

(4) close shrimp is raised: every morning and afternoon respectively throw something and feed once, and the manufactured feed of throwing something and feeding the morning accounts for the 2-3% that raises close shrimp body weight, and the fresh small fish of throwing something and feeding afternoon accounts for the 3-4% that raises close shrimp body weight; In pond, add fresh water 30-55m every day ³;

(5) nursery pond requires: select the indoor cement pit of 3m * 4m * 1.2m as nursery pond, lay gas stone in pond, gas stone density is 8-10/m ², nursery pond top covers movably puggaree, for regulating illumination;

(6) nursery pond water quality is processed: before growing seedlings and starting, need sterilize thoroughly to nursery pond, will be after 80 order nets, then pass through fine sand, and the water after activated carbon filtration enters the nursery pond of sterilizing, and water level is used 30 milliliters/meter after reaching requirement again ³formalin is processed water for larval nursing 22-26 hour, and then aeration 2-3 days, finally adds chitin, makes concentration in its pool water within reach 0.8-1 gram/meter ³;

(7) observe the mating of close shrimp: the mating situation of routine observation brackish water pond Prawn, after female shrimp oogenesis, check ovum grain developmental state, when ovum grain bleach, move into nursery pond, close shrimp enters before pond with 20 milliliters/meter ³betagen Solution soak 1-2 minute;

(8) larval culture: after female shrimp ovulation, shift out nursery pond, the hatching density of ovum should not be too high, is 30 * 10 ⁴grain～80 * 10 ⁴grain/rice 3, when the young is during at I～III phase zoea, take Micro Algae as main; When larval growth, to IV～VII, during the phase, take wheel animalcule as main, every tail prawn young is thrown something and fed 20～100/day, and throw something and feed 7-9 every day;

(9) daily management of nursery pond: change water 2-5m every day ³, keep water body pH 7.8～8.6, more than dissolved oxygen 4 mg/litre, below chemical oxygen consumption (COC) 5 mg/litre, below total ammonia nitrogen 0.5 mg/litre, below nitrite 0.1 mg/litre, use effective microorganism preparation to make water quality keep good.