CN101213949A

CN101213949A - Crab cultivation method

Info

Publication number: CN101213949A
Application number: CNA2008100136701A
Authority: CN
Inventors: 李怀章
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-19
Filing date: 2008-01-19
Publication date: 2008-07-09

Abstract

The invention relates to a culture method of aquatic products, in particular to a culture method of water crabs. The culture water quality of the culture method meets the water quality standard stated by fresh water aquaculture water quality. Natural crab fingerlings in sea area or artificial crab fingerlings reared according to the principle of organic aquiculture are selected, and mixed culture mode is adopted. The feedstuff uses live and fresh fauna and flora bait. Bed sediment is sterilized periodically during cultivation. Compared with existing culture method, the invention has the features of rapid growth speed, strong disease-resistant capability and so on; colony weight-gain rate is improved by 10 percent comparing with existing culture method; disease incidence rate reduces from 8 percent-10 percent to less than 4 percent. The invention has a remarkable economic benefit, and is a reliable technology support to increase the efficiency of fishery and the income of peasant in new period.

Description

A kind of cultural method of steamed crab

Technical field:

The present invention relates to a kind of cultural method of aquatic products, particularly a kind of cultural method of steamed crab.

Background technology:

Steamed crab belongs to a kind of of river crab, and its growth is fast, specification big, tasty mouthfeel when edible, is loved by the people.Especially the steamed crab in the Yellow River estuary area is cultured and has been called the important channel that local increasing peasant income are got rich, development along with the steamed crab aquaculture, some problem demanding prompt solutions have also appearred, generally speaking, the crab farming is all cultured by rule of thumb, often ignore the ecological environment problem of culturing, arbitrarily use medicines such as antibiotic, hormone, use industrial mixed feed, cause the ecotope of steamed crab existence to receive destruction, cause quality to descend, also can cause disease to spread, the economic benefit of crab is supported in infringement.

Summary of the invention:

Purpose of the present invention is exactly the defective that exists at prior art, and a kind of cultural method of steamed crab of science ecology is provided, and improves the economic benefit that steamed crab is cultured.Its concrete grammar is as follows:

1) culture the place: cultivate water meets the water standard of " aquiculture fresh water water quality " regulation, and water temperature 7-25 ℃ throughout the year, salinity 1.5-3%, substrate is silt or husky mud, and the bottom sludge layer is no more than 10cm, and submerged plant accounts for 30% of the gross area, floating plant accounts for 30% of the gross area, spring depth of water 0.5m, summer depth of water 0.6-1m, all the other in season 1m, change water once every 5-7 days summer, change water once every 15-20 days all the other seasons, changes water 25-35cm at every turn, arranges afterwards earlier and irritate;

2) seed source: select the natural juvenile crab in sea area or follow the artificial juvenile crab that organic aquaculture principle cultivates out;

3) aquaculture model: adopt mixed breed, steamed crab and at least a of single variety such as prawn, mandarin fish, silver carp are raised together with, adopt and put in a suitable place to breed at least 2 times by turns in 1 year;

4) bait is thrown in: feed is fresh or fresh and alive animals and plants bait, and the weight ratio that bait is thrown in is 60: 40, bait day injected volume be the 15%-30% of juvenile crab body weight;

5) disease prevention and cure: use the zinc sulphate compound medicine to kill infusorian once annual spring, in interval use in the 20-25 days quicklimes etc. substrate carried out disinfection, and regularly uses probiotics improvement water quality during the breed.

Described employing 1 is repeatedly put in a suitable place to breed from annual early March by turns and is begun to put seedling, cultured through 2-5 month, and multiple stocking and multiple fishing, choosing is stayed little greatly.

The present invention compares with existing cultural method, have characteristics such as growth is fast, resistance against diseases is strong, colony's more existing cultural method of weightening finish improves 10%, and the disease incidence is reduced to below 4% by 8%-10%, remarkable in economical benefits is that the robust techniques of new period fishery synergy increasing peasant income supports.

Embodiment:

Embodiment 1

Cultivate water meets the water standard of " aquiculture fresh water water quality " regulation, water temperature 7-25 ℃ throughout the year, salinity 1.5-3%, substrate is silt or husky mud, the bottom sludge layer is no more than 10cm, submerged plant accounts for 30% of the gross area, floating plant accounts for 30% of the gross area, spring depth of water 0.5m, summer depth of water 0.6-1m, all the other in season 1m, change water once every 5-7 days summer, and change water once every 15-20 days all the other seasons, changes water 25-35cm at every turn, arrange afterwards earlier and irritate, select the natural juvenile crab in sea area or follow the artificial juvenile crab that organic aquaculture principle cultivates out.Take the shrimp crab to raise together with.Shrimp seedling breeding density is 0.8-1.2 ten thousand tail/mus, and juvenile crab breeding density is 350-450/mu, and multiple stocking and multiple fishing can be caught 3-5 and criticize in 1 year.Feed is fresh or fresh and alive animals and plants bait, and the weight ratio that bait is thrown in is 60: 40, bait day injected volume be the 15%-20% of juvenile crab body weight.

Embodiment 2

Similar to Example 1, its difference is to adopt crab and mandarin fish to raise together with, and mandarin fish seedling breeding density is 0.5-0.6 ten thousand tail/mus, and juvenile crab breeding density is 300-400/mu, and multiple stocking and multiple fishing can be caught 2-5 and criticize in 1 year.Feed is fresh or fresh and alive animals and plants bait, and the weight ratio that bait is thrown in is 60: 40, bait day injected volume be the 20%-35% of juvenile crab body weight.

Embodiment 3

Similar to Example 1, its difference is to adopt crab and silver carp to raise together with, and silver carp seedling breeding density is 0.6-0.8 ten thousand tail/mus, and juvenile crab breeding density is 400-500/mu, and multiple stocking and multiple fishing can be caught 3-4 and criticize in 1 year.Feed is fresh or fresh and alive animals and plants bait, and the weight ratio that bait is thrown in is 60: 40, bait day injected volume be the 18%-30% of juvenile crab body weight.

Claims

1. the cultural method of a steamed crab is characterized in that its concrete grammar is as follows:

4) bait is thrown in: feed is fresh or fresh and alive animals and plants bait, and the weight ratio that bait is thrown in is 60: 40, and a day injected volume is the 15%-30% of juvenile crab body weight;

5) disease prevention and cure: in the use quicklime etc. substrate is carried out disinfection, regularly use probiotics improvement water quality during the breed, splashed 1 time in 20-25 days.

2. the cultural method of steamed crab according to claim 1 is characterized in that described employing 1 is repeatedly put in a suitable place to breed by turns from annual early March and begins to put seedling, cultured through 2-5 month, and multiple stocking and multiple fishing, choosing is stayed little greatly.