Nuisanceless fresh water shrimp culture method
Technical field
The present invention relates to a kind of fresh water shrimp culture method, is a kind of nuisanceless fresh water shrimp culture method of hybridizing and coordinating fry to cultivate together specifically.
Background technology
The fresh water freshwater shrimp, formal name used at school Japanese macrobrachium supernbum (Macrobrachium nipponense), belong to shell-fish, Decapoda, swimming suborder, Eucyphidea, long-armed section, pond crayfish genus, a fairly large number of a kind of in fresh water shrimp, one of traditional economy shrimp species in China's freshwater aquaculture industry.Because cultivation freshwater shrimp disease is many at present, cost is high, pollution is large, and cultivation freshwater shrimp enthusiasm is not high, causes a large amount of ponds half uncultivated or idle; The problems such as moreover in propagating artificially, the freshwater shrimp specification is little, and feed coefficient is large, causes the inbred vicious circle of freshwater shrimp, and cultural technique is lack of standardization can not get solving.
In addition because the shrimp seedling of supporting down in 7-8 month has begun amount reproduction second generation shrimp seedling again to September, they are robbed feed with the freshwater shrimp of a period of time of growing and eat, also to occupy space in the pond, absorb oxygen, make it the pretty good freshwater shrimp of front growing way and lose good growing environment, feeding and management etc. has all been brought certain difficulty, and the freshwater shrimp stature that goes out in the end the pool is uneven, and commercial sized prawn is very poor, output is very low, and benefit is naturally bad.
Summary of the invention
For the problems referred to above, the invention provides a kind of by the improved seeds after the young shrimp hybridization of local shrimp and Taihu Lake, the nuisanceless fresh water shrimp culture method that coordinates fry to cultivate together after cultivation a period of time.
The present invention is achieved by the following technical solutions: a kind of nuisanceless fresh water shrimp culture method comprises the following steps:
(1) the shrimp pond requires: nursery pond area 3-5 mu is advisable, and depth of water 1.0-1.2m is smooth at the bottom of the pond, removes mud and is not more than 10 centimeters;
(2) process in the shrimp pond: comprise shrimp pond sterilization, shrimp pond water quality cultivation;
(3) cross mating: use female shrimp and local male shrimp from the high-quality population to hybridize;
(4) the shrimp seedling is put in a suitable place to breed: the last ten-days period in July to every mu of early August is put shrimp seedling 6-8 ten thousand tails in a suitable place to breed;
(5) throw the feeding tube reason;
(6) water quality management: water colour is with light rice-pudding look or yellow green, and transparency is 30-40cm, and the Xia Qiugao warm season keeps peak level, changes water once in every 8-10 days, and quantity of exchanged water is 1/4;
(7) density is controlled: freshwater shrimp in every mu of September pond 3000 tails that can breed fish fry.
As preferably, in step 2, available quicklime or bleaching powder or bleaching powder in the freshwater shrimp pond inject the 20-30cm clear water, carry out disinfection and improve substrate, drain after 24h.
As preferably, after sterilizing in the pond, then advance filtered water 30-40cm, and discharge the fertile beneficial organism fertilizer formulations with containing bacillus of aquaculture special bio, be used for cultivating water quality.
As preferably, in step 3, adopt the young female shrimp in Taihu Lake and local male shrimp to hybridize at 2: 1.
As preferably, in step 5, within 10-15 days early stage, after mixing thoroughly, the combination feed of throwing something and feeding, water splash in the pond surrounding, the every mu of 1mg left and right of throwing something and feeding; After shrimp grows to 2cm, the pellet of just can throwing something and feeding.
As preferably, described combination feed is vegetable feed and feed of animal origin in 7: 3 ratio furnishings; Feeding volume can be eaten up at 2-3 hour with shrimp and be as the criterion, and day rate of throwing something and feeding is the 3-5% of freshwater shrimp body weight, and a minute secondary is thrown something and fed, and the morning is during 8-9, afternoon, feeding volume accounted for 1/3 the morning, in afternoon 2/3, throws in the surrounding shoal during 4-5, according to the freshwater shrimp habit of hiding by day and coming out at night, in vigorous season of growth, add 1 time after at 10 in evening.
The present invention has taked above-mentioned corrective measure to carry out, its beneficial effect is remarkable: the present invention takes full advantage of the idle resources of production, need not to increase professional equipment, without breeding pollution, industrialization administrative staff, cultural technique standard criterion, discharge biologic product and control water quality, reduce the use of medicine, make freshwater shrimp reach the pollution-free healthy requirement, promoted product quality value.
In addition, the high-quality shrimp seedling after cross mating can be brought into play hybrid vigour, improving the aspects such as growth rate, disease-resistant anti-adversity ability and delay maturation, goes out to such an extent that the shrimp seedling improves significantly than traditional local shrimp parent culture.
After shrimp seed rearing is about two months, begin to breed the second generation, breed fish fry in the pond, the freshwater shrimp seedling that just in time will just hatch is out eaten in the presence of feed, and the first generation has also grown into enough large individuality, and to going out pool listing, the commercial sized prawn specification is neat, output is high more than 30%, and more than 100 jin of fry, economic benefit improves greatly.By the large specification freshwater shrimp of the cultivation per mu yield 150kg of 2 years, tradition cultivation freshwater shrimp output improved 60% on year-on-year basis, and unit price improves 40%, and economic benefit improves 120%.
Embodiment
The present invention is further illustrated below in conjunction with embodiment: experiment is carried out in Deqing County Wu Yue aquaculture Co., Ltd.
Embodiment 1
A kind of nuisanceless fresh water shrimp culture method comprises the following steps:
(1) the shrimp pond requires: 3 mu of nursery pond areas are advisable, and depth of water 1.0m is smooth at the bottom of the pond, removes mud and is not more than 10 centimeters;
(2) process in the shrimp pond: freshwater shrimp is used quicklime in the pond, injects the 20cm clear water, carries out disinfection and improves substrate, drain after 24h, after sterilizing in the pond, then advance filtered water 30cm, and discharge the fertile beneficial organism fertilizer formulations with containing bacillus of aquaculture special bio, be used for cultivating water quality;
(3) cross mating: adopt the young female shrimp in Taihu Lake and local male shrimp to hybridize (female shrimp and local male shrimp adopt conventional equipment to fish for, screen) at 2: 1;
(4) the shrimp seedling is put in a suitable place to breed: the last ten-days period in July to every mu of early August is put shrimp seedling 60,000 tails in a suitable place to breed;
(5) throw the feeding tube reason: the 11st day early stage, throw something and feed vegetable feed and feed of animal origin were splashed in the pond surrounding after water is mixed thoroughly in the combination feed of 7: 3 ratio furnishings, the every mu of 1mg left and right of throwing something and feeding; After shrimp grew to 2cm, the pellet of just can throwing something and feeding, feeding volume can be eaten up at 2 hours with shrimp and be as the criterion, day rate of throwing something and feeding is 3% of freshwater shrimp body weight, divide secondary to throw something and feed, at 8 o'clock in the morning, at 4 o'clock in afternoon, feeding volume accounts for 1/3 the morning, in afternoon 2/3, throw in the surrounding shoal, according to the freshwater shrimp habit of hiding by day and coming out at night, in vigorous season of growth, add 1 time after at 10 in evening;
(6) water quality management: for well, transparency is 30-40cm to water colour with light rice-pudding look or yellow green, and the Xia Qiugao warm season keeps peak level, changes water once in every 8-10 days, and quantity of exchanged water is 1/4;
(7) density is controlled: freshwater shrimp in every mu of September pond 3000 tails that can breed fish fry.
Embodiment 2
Condition is basic identical with embodiment 1.A kind of nuisanceless fresh water shrimp culture method comprises the following steps, and 5 mu of nursery pond areas are advisable, and depth of water 1.2m is smooth at the bottom of the pond, removes mud and is not more than 10 centimeters; Freshwater shrimp is used bleaching powder in the pond, injects the 30cm clear water, carries out disinfection, and drains after 24h, after sterilization, then advances filtered water 40cm, and discharges the fertile beneficial organism fertilizer formulations with containing bacillus of aquaculture special bio, is used for cultivating water quality; After the young female shrimp in Taihu Lake and local male shrimp hybridize at 2: 1, put shrimp seedling 60,000 tails in a suitable place to breed in the last ten-days period in July to every mu of early August; The 14th day early stage, throw something and feed vegetable feed and feed of animal origin were splashed in the pond surrounding after water is mixed thoroughly in the combination feed of 7: 3 ratio furnishings, the every mu of 1mg left and right of throwing something and feeding; After shrimp grew to 2cm, the pellet of just can throwing something and feeding, feeding volume can be eaten up at 3 hours with shrimp and be as the criterion, day rate of throwing something and feeding is 5% of freshwater shrimp body weight, divide secondary to throw something and feed, at 9 o'clock in the morning, at 5 o'clock in afternoon, feeding volume accounts for 1/3 the morning, in afternoon 2/3, throw in the surrounding shoal, according to the freshwater shrimp habit of hiding by day and coming out at night, in vigorous season of growth, add 1 time after at 10 in evening.
Embodiment 3
Condition is basic identical with embodiment 1.A kind of nuisanceless fresh water shrimp culture method comprises the following steps, and 4 mu of nursery pond areas are advisable, and depth of water 1.1m is smooth at the bottom of the pond, removes mud and is not more than 10 centimeters; Freshwater shrimp is used bleaching powder in the pond, injects the 25cm clear water, carries out disinfection, and drains after 24h, after sterilization, then advances filtered water 35cm, and discharges the fertile beneficial organism fertilizer formulations with containing bacillus of aquaculture special bio, is used for cultivating water quality; After the young female shrimp in Taihu Lake and local male shrimp hybridize at 2: 1, put shrimp seedling 60,000 tails in a suitable place to breed in the last ten-days period in July to every mu of early August; The 13rd day early stage, throw something and feed vegetable feed and feed of animal origin were splashed in the pond surrounding after water is mixed thoroughly in the combination feed of 7: 3 ratio furnishings, the every mu of 1mg left and right of throwing something and feeding; After shrimp grew to 2cm, the pellet of just can throwing something and feeding, feeding volume can be eaten up at 2.5 hours with shrimp and be as the criterion, day rate of throwing something and feeding is 4% of freshwater shrimp body weight, divide secondary to throw something and feed, 8 a.m. half, 4 thirty of afternoon, feeding volume accounts for 1/3 the morning, in afternoon 2/3, throw in the surrounding shoal, according to the freshwater shrimp habit of hiding by day and coming out at night, in vigorous season of growth, add 1 time after at 10 in evening.
What more than enumerate is only specific embodiments of the invention, obviously, the invention is not restricted to above embodiment.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should belong to protection scope of the present invention.