CN103931526A

CN103931526A - Method for efficiently breeding crayfishes in fresh water

Info

Publication number: CN103931526A
Application number: CN201410142182.6A
Authority: CN
Inventors: 王云帝
Original assignee: HUNAN NATURE AGRICULTURAL INDUSTRIAL CO LTD
Current assignee: HUNAN NATURE AGRICULTURAL INDUSTRIAL CO LTD
Priority date: 2014-04-11
Filing date: 2014-04-11
Publication date: 2014-07-23

Abstract

The invention relates to the field of crayfish breeding, in particular to a method for efficiently breeding crayfishes in fresh water. The method is characterized in that a rice field is levelled, water depth of 40 cm to 60 cm can be kept by ridges, annular crayfish breeding furrows with the width of 1 m to 1.5 m and the depth of 1 m are dug in the peripheries in the ridges, and the furrows are 0.5 m to 1.5 m wide and 0.5 m deep; for vast stretches of rice and crayfish continuous cropping base, anti-escape walls should be built on the periphery of the ridges adjacent to the outside through plastic films or meshes, a thin bamboo pole is used as a supporting column to hang the films every one meter, the lower ends of the plastic films are embedded into the soil for 20 cm, and the upper ends of the plastic films are more than 50 cm higher than the ridges; the anti-escape effect can also be achieved through calcium-plastic plates or asbestos tiles or other materials with smooth surfaces, but it should be noticed that the corners are made into arcs and the interfaces are smooth. Because the technical scheme is adopted, the incidence of a disease is reduced, the death rate is reduced, the growth speed of crayfish fries is increased, and the breeding efficiency is enhanced.

Description

A kind of method of efficient freshwater aquiculture cray

Technical field

The present invention relates to cultivation cray field, is a kind of method of efficient freshwater aquiculture cray.

Background technology

Cray (formal name used at school Ke Shi crayfish) is nineteen thirties to introduce China from Japan, because cray is more intense to the adaptability of environment, feeding habits wide, fast growth Er China most areas is able to Growth and Reproduction widely.Due to cray delicious flavour, the nutritious homely dish becoming on popular dining table, at home and abroad market is well received simultaneously.At present, because the method for cultivation is limit, the lower needs that can not meet market of output.

Summary of the invention

The object of the invention is to provide a kind of method of efficient freshwater aquiculture cray.

The present invention is achieved like this: a kind of method of efficient freshwater aquiculture cray, it is characterized in that rice field is smooth, and ridge can keep the depth of water of 40cm ~ 60cm, in ridge, along surrounding, excavate wide 1 m-1.5m, the annular of dark 1m is supported shrimp ditch, furrow width 0.5 m-1.5m, dark 0.5m; The anti-wall of escaping should be built with plastic film or net sheet in the ridge surrounding with boundary, the external world in rice shrimp continuous cropping base in blocks, every 1m left and right, with thin bamboo, is pillar biofilm, and 20cm in soil is imbedded in the lower end of film, more than upper end exceeds ridge 50cm; Also can prevent escaping with smooth surface materials such as calcium-plastic board or asbestos shingles, but camber is done by attention corner, interface be smooth; Be exposed to the sun 3 days in rice field in first about 15 days putting shrimp, then with 50kg quicklime, evenly splash after sterilization and inject 50cm-80cm clear water for every mu, after 5 days, every mu of use has been pulverized and the young cake 42kg of soaked tea evenly splashes in rice field; About annual mid-April, by specification, be the every kg cray of 120-200 tail shrimp seedling, concentrate in little Chi and feed 3-5 days, according to the ratio in morning 30%, evening 70%, throw in mixed feed and feed, per kilogram feed adds 10g-15g ginseng, Isatis Root; Then select gentle breeze, bright day gas, the morning 8-10 shrimp seedling of naming a person for a particular job according to the ratio of every mu of 50kg, be transferred to rice field, after 7 days, start to drop into mixed feed and feed, per kilogram feed adds 20g allicin, feeds continuously 3-5 days; Shrimp seedling was thrown in after rice field 10-15 days, the young cake of tea is pulverized to immersion and after 12 hours, according to the ratio of every mu of rice field 12kg, evenly splash; Within about 20 days before becoming shrimp to fish for, according to per kilogram feed, add 10g ginseng pulverate's continuous the nursing 3 days of ratio, then adopt cage trapping, every day or every other day a mobile cage.

Owing to having adopted technique scheme, reduced the incidence of disease, reduce lethality, improved the growth rate of shrimp seedling, strengthened cultivation efficiency.

Embodiment

Below in conjunction with example, the invention will be further described.

Rice field is smooth, and ridge can keep the depth of water of 40cm ~ 60cm, in ridge, along surrounding, excavates wide 1 m-1.5m, and the annular of dark 1m is supported shrimp ditch, furrow width 0.5 m-1.5m, dark 0.5m; The anti-wall of escaping should be built with plastic film or net sheet in the ridge surrounding with boundary, the external world in rice shrimp continuous cropping base in blocks, every 1m left and right, with thin bamboo, is pillar biofilm, and 20cm in soil is imbedded in the lower end of film, more than upper end exceeds ridge 50cm; Also can prevent escaping with smooth surface materials such as calcium-plastic board or asbestos shingles, but camber is done by attention corner, interface be smooth; Be exposed to the sun 3 days in rice field in first about 15 days putting shrimp, then with 50kg quicklime, evenly splash after sterilization and inject 50cm-80cm clear water for every mu, after 5 days, every mu of use has been pulverized and the young cake 42kg of soaked tea evenly splashes in rice field; About annual mid-April, by specification, be the every kg cray of 120-200 tail shrimp seedling, concentrate in little Chi and feed 3-5 days, according to the ratio in morning 30%, evening 70%, throw in mixed feed and feed, per kilogram feed adds 10g-15g ginseng, Isatis Root; Then select gentle breeze, bright day gas, the morning 8-10 shrimp seedling of naming a person for a particular job according to the ratio of every mu of 50kg, be transferred to rice field, after 7 days, start to drop into mixed feed and feed, per kilogram feed adds 20g allicin, feeds continuously 3-5 days; Shrimp seedling was thrown in after rice field 10-15 days, the young cake of tea is pulverized to immersion and after 12 hours, according to the ratio of every mu of rice field 12kg, evenly splash; Within about 20 days before becoming shrimp to fish for, according to per kilogram feed, add 10g ginseng pulverate's continuous the nursing 3 days of ratio, then adopt cage trapping, every day or every other day a mobile cage.

Rice field will select that water quality is good, the water yield is sufficient, not pollutions, loamy soil field, rice field is dried up source is near, water-based can be good, irrigation and drainage facilitate, and can not be inundated with flood.Several mu at least of areas, at most tens mu or hundreds of mu all can, area is large, is to be mainly convenient to centralized management and to save labor cost.Utilize the earth that ditching is dug out to reinforce, widen, increase often to add one deck soil when ridge, smooth field face, ridge are reinforced and all will tamp, in case ridge caves in during storm.Ridge height 50-70cm, wide is more than 50cm, ridge base portion is widened to 1-1.5m.Irrigation channel is built on ridge, and discharge outlet is built shrimp ditch lowest part in, fills with low row's general layout according to height, guarantees to fill with to such an extent that enter, and row draws.Enter that discharge outlet will be installed bamboo paper tinsel wire netting or fence surrounds, prevent that cray flight and harmful animal from entering.

Select health, uniform shrimp seedling; Mixed feed injected volume is 3% of shrimp seedling gross weight; Owing to being rich in the various trace elements such as organic acid, Panasenoside, amino acid, polysaccharide such as the multiple ginsenoside such as ginsenoside RH2, RB1, panax acid in ginseng, can make frightened juvenile prawn reinforce vital energy, build up health and anti-stress reaction ability.In Radix Isatidis, be rich in the Multiple components such as cupreol, indigo glucoside, amino acid, have antibacterial, antiviral effect, reduced the probability of falling ill in shrimp seedling breeding process, for the healthy growth of cray lays a solid foundation.Allicin.Allicin is a kind of broad spectrum antibiotic, for cray cultivation, can obviously strengthen appetite, the reduction incidence of disease of shrimp seedling, reduces lethality, improves the growth rate of shrimp seedling.The young cake of tea not only can kill the cray natural enemy in water body, can also kill the parasite being attached in cray body surface, effectively prevent the generation of the diseases such as the rotten shell of cray, infusorian, pestilence, impel cray shelling time unification, accelerate growth rate, shorten growth cycle, reduce feeding volume and lethality; Ginseng pulverate not only can improve that cray output and skin are delicate, fleshiness, strengthened cray outward appearance U.S. degree, reduced the lethality during cray is fished for and transports.

By this cultural method, make the finished product shrimp in every mu of rice field reach following target: 1, output is increased production 20% left and right, and per mu yield reaches 180-200kg; 2, growth cycle shortens about 10-15 days; 3, uniform specification, the single weight of finished product shrimp 90% reaches 50g left and right; 4, Fresh & Tender in Texture, nutritious.5, reduce by 10% lethality; 6,98% reaches pollution-free food standard.

Claims

1. a method for efficient freshwater aquiculture cray, is characterized in that rice field is smooth, and ridge can keep the depth of water of 40cm ~ 60cm, in ridge, along surrounding, excavates wide 1 m-1.5m, and the annular of dark 1m is supported shrimp ditch, furrow width 0.5 m-1.5m, dark 0.5m; The anti-wall of escaping should be built with plastic film or net sheet in the ridge surrounding with boundary, the external world in rice shrimp continuous cropping base in blocks, every 1m left and right, with thin bamboo, is pillar biofilm, and 20cm in soil is imbedded in the lower end of film, more than upper end exceeds ridge 50cm; Also can prevent escaping with smooth surface materials such as calcium-plastic board or asbestos shingles, but camber is done by attention corner, interface be smooth; Be exposed to the sun 3 days in rice field in first about 15 days putting shrimp, then with 50kg quicklime, evenly splash after sterilization and inject 50cm-80cm clear water for every mu, after 5 days, every mu of use has been pulverized and the young cake 42kg of soaked tea evenly splashes in rice field; About annual mid-April, by specification, be the every kg cray of 120-200 tail shrimp seedling, concentrate in little Chi and feed 3-5 days, according to the ratio in morning 30%, evening 70%, throw in mixed feed and feed, per kilogram feed adds 10g-15g ginseng, Isatis Root; Then select gentle breeze, bright day gas, the morning 8-10 shrimp seedling of naming a person for a particular job according to the ratio of every mu of 50kg, be transferred to rice field, after 7 days, start to drop into mixed feed and feed, per kilogram feed adds 20g allicin, feeds continuously 3-5 days; Shrimp seedling was thrown in after rice field 10-15 days, the young cake of tea is pulverized to immersion and after 12 hours, according to the ratio of every mu of rice field 12kg, evenly splash; Within about 20 days before becoming shrimp to fish for, according to per kilogram feed, add 10g ginseng pulverate's continuous the nursing 3 days of ratio, then adopt cage trapping, every day or every other day a mobile cage.