CN112352717A - River crab temporary breeding method in winter - Google Patents

Abstract

A river crab temporary rearing method in winter comprises the following steps: the method is simple, scientific and reasonable, can effectively improve the survival rate of the temporary culture of the river crabs and ensure that the fullness of the river crabs is high, thereby improving the culture income of the river crabs.

Description

River crab temporary breeding method in winter

Technical Field

The invention relates to the technical field of aquaculture, in particular to a river crab temporary culture method in winter.

Background

Chinese mitten crabs (Eriocheir sisense H.) are commonly called river crabs, are peculiar famous aquatic products in China and are mainly distributed in Yangtze river, Liaohe river and Oujiang river of China, wherein the Yangtze river system river crabs grow fast, have large specifications, strong disease resistance and delicious and famous taste, eggs laid by the river crabs generate flea-shaped larvae, and the flea-shaped larvae of the river crabs become adult crabs through the large-eye larvae, the young crabs, the juvenile crabs and crab seeds in a proper ecological environment.

The river crab has the advantages of large individual body, rapid growth, well-formed food, tender meat, delicious taste and high nutritive value. Every 100 g of fresh meat contains 14 g of protein, 5.9 g of fat, 7 g of carbohydrate, and in addition, the fresh meat also contains rich mineral substances and vitamins thereof, and is a famous and precious aquatic product which is popular with Chinese people for a long time.

The season for intensively fishing commercial river crabs to go on the market is about 9-10 months per year, the fishing periods of lakes, seines, ponds, paddy fields and the like are centralized, and the quantity of commercial crabs is huge. The river crabs can be prevented from appearing on the market early through temporary breeding, the price is low, the breeding benefit is low, and the river crabs can appear on the market at proper time; however, the existing temporary culture mode has some defects and the survival rate is not high, namely the invention provides a temporary culture method for river crabs in winter to meet the requirements.

Disclosure of Invention

Technical problem to be solved

The invention provides a temporary river crab culture method in winter, which is simple, scientific and reasonable, and can effectively improve the survival rate of temporary river crab culture and the fullness of river crabs, thereby improving the culture income of river crabs.

(II) the adopted technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a river crab temporary rearing method in winter is characterized by comprising the following steps:

(1) greenhouse building and temporary rearing time:

generally, the temporary culture time in winter begins from 10 middle ten days, a support is built by iron wires at the lake side, the river side or the pond side in the early period through wooden piles and bamboo poles, and then a greenhouse is built by covering films;

(2) construction of temporary rearing pond

Then, building a greenhouse with the length of 20-80m, the width of 8-16m and the depth of 1-1.6m in the greenhouse, and matching with oxygen increasing equipment;

(3) temporary rearing pond disinfection

Disinfecting the temporary rearing pond by quicklime or bleaching powder, and planting a proper amount of water plants for river crabs to inhabit;

and (3) aquatic plant cultivation: planting various aquatic weeds such as waterweeds, eel grass, hydrilla verticillata, hornworts and small arrowheads, timely adding a substrate modifier and a biological agent into water to ensure the growth of the aquatic weeds, and periodically fishing the aquatic weeds at dense positions;

(4) river crab selection

Crab seedlings with complete steps, pure varieties, regular specifications, strong physique, active crawling, no injury and no disease are selected for stocking, and the stocking density is controlled to be 800 plus 960 per mu;

(5) river crab feeding

Feeding the feed at regular time three times every day, wherein the feeding time of two adjacent times is 3-4 hours apart;

the feed is prepared from the following raw materials in parts by weight: 15-20 parts of dry fish meal, 20-30 parts of soybean meal, 18-24 parts of peanut meal, 12-22 parts of small shrimps, 10-16 parts of river snail meat, 1-3 parts of citric acid and 2-4 parts of a phagostimulant;

the preparation method of the feed comprises the following steps: sequentially adding the raw materials in the weight ratio into a stirrer for stirring and uniformly mixing, and then granulating through an extruder;

(6) daily management

Periodically checking the water quality, arranging a water quality pH value measuring device in the temporary culture pond, arranging a detection station outside the temporary culture pond, and arranging real-time monitoring of the water quality in the detection station, wherein the detection contents comprise the water quality pH value, the water quality oxygen content, the water temperature and the water level height; the water temperature is controlled between 22 ℃ and 28 ℃; and (4) according to the water quality condition, carrying out water changing treatment on the water in the temporary culture pond for changing one third to one half of the water, wherein the water changing is carried out slowly.

(III) advantageous effects

The invention provides a river crab temporary culture method in winter, which has the following beneficial effects:

the temporary culture method is simple, scientific and reasonable, can effectively improve the survival rate of temporary culture of the river crabs, and has high fullness of the river crabs, thereby improving the culture income of the river crabs;

the invention provides the comprehensive nutritional ingredients of the river crabs through the developed feed, can improve the survival rate of the river crabs, can ensure that the river crabs have high fullness, increase the weight and improve the economic benefit.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Examples

A river crab temporary rearing method in winter is characterized by comprising the following steps: step by step

(1) Greenhouse building and temporary rearing time:

generally, the temporary culture time in winter begins from 10 middle ten days, a support is built by iron wires at the lake side, the river side or the pond side in the early period through wooden piles and bamboo poles, and then a greenhouse is built by covering films;

(2) construction of temporary rearing pond

Then, building a greenhouse with the length of 20-80m, the width of 8-16m and the depth of 1-1.6m in the greenhouse, and matching with oxygen increasing equipment;

(3) temporary rearing pond disinfection

Disinfecting the temporary rearing pond by quicklime or bleaching powder, and planting a proper amount of water plants for river crabs to inhabit;

and (3) aquatic plant cultivation: planting various aquatic weeds such as waterweeds, eel grass, hydrilla verticillata, hornworts and small arrowheads, timely adding a substrate modifier and a biological agent into water to ensure the growth of the aquatic weeds, and periodically fishing the aquatic weeds at dense positions;

(4) river crab selection

Crab seedlings with complete steps, pure varieties, regular specifications, strong physique, active crawling, no injury and no disease are selected for stocking, and the stocking density is controlled to be 800 plus 960 per mu;

(5) river crab feeding

Feeding the feed at regular time three times every day, wherein the feeding time of two adjacent times is 3-4 hours apart;

the feed is prepared from the following raw materials in parts by weight: 15-20 parts of dry fish meal, 20-30 parts of soybean meal, 18-24 parts of peanut meal, 12-22 parts of small shrimps, 10-16 parts of river snail meat, 1-3 parts of citric acid and 2-4 parts of a phagostimulant;

the preparation method of the feed comprises the following steps: sequentially adding the raw materials in the weight ratio into a stirrer for stirring and uniformly mixing, and then granulating through an extruder;

(6) daily management

Periodically checking the water quality, arranging a water quality pH value measuring device in the temporary culture pond, arranging a detection station outside the temporary culture pond, and arranging real-time monitoring of the water quality in the detection station, wherein the detection contents comprise the water quality pH value, the water quality oxygen content, the water temperature and the water level height; the water temperature is controlled between 22 ℃ and 28 ℃; and (4) according to the water quality condition, carrying out water changing treatment on the water in the temporary culture pond for changing one third to one half of the water, wherein the water changing is carried out slowly.

The temporary culture method is simple, scientific and reasonable, and can effectively improve the survival rate of the temporary culture of the river crabs and ensure that the fullness of the river crabs is high, thereby improving the culture income of the river crabs.

While the basic teachings of the present invention have been described, numerous extensions and variations will be apparent to those of ordinary skill in the art. As the present invention disclosed in the specification may be embodied in other specific forms without departing from the spirit or general characteristics thereof, and it is noted that some of these specific forms have been set forth, the embodiments disclosed in the specification should be considered as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.

Claims (1)

1. A river crab temporary rearing method in winter is characterized by comprising the following steps:

(1) greenhouse building and temporary rearing time:

generally, the temporary culture time in winter begins from 10 middle ten days, a support is built by iron wires at the lake side, the river side or the pond side in the early period through wooden piles and bamboo poles, and then a greenhouse is built by covering films;

(2) construction of temporary rearing pond

Then, building a greenhouse with the length of 20-80m, the width of 8-16m and the depth of 1-1.6m in the greenhouse, and matching with oxygen increasing equipment;

(3) temporary rearing pond disinfection

Disinfecting the temporary rearing pond by quicklime or bleaching powder, and planting a proper amount of water plants for river crabs to inhabit;

and (3) aquatic plant cultivation: planting various aquatic weeds such as waterweeds, eel grass, hydrilla verticillata, hornworts and small arrowheads, timely adding a substrate modifier and a biological agent into water to ensure the growth of the aquatic weeds, and periodically fishing the aquatic weeds at dense positions;

(4) river crab selection

Crab seedlings with complete steps, pure varieties, regular specifications, strong physique, active crawling, no injury and no disease are selected for stocking, and the stocking density is controlled to be 800 plus 960 per mu;

(5) river crab feeding

Feeding the feed at regular time three times every day, wherein the feeding time of two adjacent times is 3-4 hours apart;

the feed is prepared from the following raw materials in parts by weight: 15-20 parts of dry fish meal, 20-30 parts of soybean meal, 18-24 parts of peanut meal, 12-22 parts of small shrimps, 10-16 parts of river snail meat, 1-3 parts of citric acid and 2-4 parts of a phagostimulant;

the preparation method of the feed comprises the following steps: sequentially adding the raw materials in the weight ratio into a stirrer for stirring and uniformly mixing, and then granulating through an extruder;

(6) daily management

Periodically checking the water quality, arranging a water quality pH value measuring device in the temporary culture pond, arranging a detection station outside the temporary culture pond, and arranging real-time monitoring of the water quality in the detection station, wherein the detection contents comprise the water quality pH value, the water quality oxygen content, the water temperature and the water level height; the water temperature is controlled between 22 ℃ and 28 ℃; and (4) according to the water quality condition, carrying out water changing treatment on the water in the temporary culture pond for changing one third to one half of the water, wherein the water changing is carried out slowly.