Breeding method for increasing molting success rate and turnover rate of crayfishes

Abstract

The invention provides a breeding method for increasing the molting success rate and turnover rate of crayfishes and relates to the technical field of freshwater breeding of aquatic products. The method comprises the following steps of S1, pond construction, wherein the top width of the pond bank is 2.5-3.5 m, the gradient is 1:3, and the water depth is 1-2 m; S2, selection of fry, wherein the specification of the crayfish fry is 120 individuals per jin; S3, regulation and control of the water quality, wherein a substrate modifier is added into water of the pond according to the concentrationof 300 mL / 667 m<3>, the crayfish fry are put into the pond three days later, fertilizer water is added into the water of the pond according to the concentration of 1 L / 667 m<3>, topdressing is carriedout once every 10 days, lactic acid bacteria are added into the water of the pond according to the concentration of 1 L / 667 m<3> once every 7 days to maintain the transparency of the water at 28-32 cm, and the water quality index is periodically detected; S4, planting and management of aquatic weeds, wherein the planting area of the aquatic weeds accounts for 1 / 3-2 / 3 of the total area of the pond; S5, supplementing of nutrients, wherein floating feed crude protein is put for feeding at night every day, the feeding amount is 3% of the total weight of the crayfishes, and fertilizer containing calcium, phosphorus and magnesium is poured into the water during molting of the crayfishes. The operation method is simple.

Description

technical field

[0001] The invention belongs to the technical field of freshwater culture of aquatic products, and relates to a culture method for improving the success rate and doubling rate of crayfish molting. Background technique

[0002] The protein content of crayfish is very high, and the meat is soft and easy to digest. It is suitable for people who are weak and need to take care of themselves after illness. Crayfish meat is rich in magnesium, zinc, iodine, selenium and other elements, among which magnesium plays an important role in heart activity. It can protect the cardiovascular system, reduce the cholesterol content in the blood, prevent arteriosclerosis, and at the same time expand the coronary arteries, which is conducive to the prevention of high blood pressure and myocardial infarction. Crayfish contains astaxanthin, which has a variety of physiological effects, such as anti-oxidation, anti-tumor, cancer prevention, immunity enhancement, and vision improveme...

Examples

Embodiment 1

[0017] A culture method for improving the success rate and doubling rate of crayfish molting, comprising the following steps:

[0018] S1 Pond construction: The pond is in the shape of a cuboid with a top width of 3m and a slope of 1:3. The soil is one or two of loam and clay, and the water depth is 1.5m;

[0019] Selection of S2 seedlings: The size of crayfish seedlings is 120 per catties, with bright body color, complete appendages and no foreign objects, no blisters on the tail fan, white gills, bright yellow liver, full intestinal tract, and no germs;

[0020] S3 water quality control: according to 300mL / 667m 3 Throw the substrate improver (three-effect detoxification) into the water body of the pond, and put the crayfish seedlings into the pond three days later, according to 1L / 667m 3 Put fertilizer water (rich water source) into the water body of the pond, topdress once every 10 days, and follow 1L / 667m every 7 days 3 Put lactic acid bacteria into the water body of the...

technical field

[0001] The invention belongs to the technical field of freshwater culture of aquatic products, and relates to a culture method for improving the success rate and doubling rate of crayfish molting. Background technique

[0002] The protein content of crayfish is very high, and the meat is soft and easy to digest. It is suitable for people who are weak and need to take care of themselves after illness. Crayfish meat is rich in magnesium, zinc, iodine, selenium and other elements, among which magnesium plays an important role in heart activity. It can protect the cardiovascular system, reduce the cholesterol content in the blood, prevent arteriosclerosis, and at the same time expand the coronary arteries, which is conducive to the prevention of high blood pressure and myocardial infarction. Crayfish contains astaxanthin, which has a variety of physiological effects, such as anti-oxidation, anti-tumor, cancer prevention, immunity enhancement, and vision improveme...

Examples

Embodiment 1

[0017] A culture method for improving the success rate and doubling rate of crayfish molting, comprising the following steps:

[0018] S1 Pond construction: The pond is in the shape of a cuboid with a top width of 3m and a slope of 1:3. The soil is one or two of loam and clay, and the water depth is 1.5m;

[0019] Selection of S2 seedlings: The size of crayfish seedlings is 120 per catties, with bright body color, complete appendages and no foreign objects, no blisters on the tail fan, white gills, bright yellow liver, full intestinal tract, and no germs;

[0020] S3 water quality control: according to 300mL / 667m 3 Throw the substrate improver (three-effect detoxification) into the water body of the pond, and put the crayfish seedlings into the pond three days later, according to 1L / 667m 3 Put fertilizer water (rich water source) into the water body of the pond, topdress once every 10 days, and follow 1L / 667m every 7 days 3 Put lactic acid bacteria into the water body of the...