High-yield Cultivation Method of Eriocheir sinensis Seedlings

A technology of Chinese mitten crab and cultivation method, which is applied in the field of high-yield cultivation of Chinese mitten crab seedlings, can solve the problems of slow temperature recovery and unsatisfactory crab seedling period, etc., so as to reduce difficulty, improve the survival rate of larvae and improve water quality. Effects that do not deteriorate easily

Inactive Publication Date: 2016-08-24
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is also a fly in the ointment. Since the crab seedlings are produced in the central part of the coastal area of ​​Jiangsu, the temperature returns slowly every spring. Compared with the inland and the southern regions of the Yangtze River Basin, the temperature is relatively low. The period of large-scale output of crab seedlings cannot meet the needs of some areas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The high-yield cultivation method of the Chinese mitten crab seedling in embodiment 1 specifically comprises the steps:

[0027] a. Construction of nursery ponds: build long-shaped nursery ponds running north-south, with an area of ​​660m2 2 , the width of the upper mouth of the nursery pond is 12m, the width of the bottom of the nursery pond is 7.5m, and the slope ratio is 1:1; the average water depth of the nursery pond is 2.0~2.2m; a scaffold is built with bamboo poles on the nursery pond, and the plastic film is covered on the frame. Greenhouses, 0.8 per m in nursery pools 2 The proportion of oxygen-increasing head;

[0028] b. Inlet water disinfection: The nursery pool starts to inflow water 20 days before the parent crabs hang the baskets and cloth seedlings. The water quality requirements of the inflow water must meet the fishery water standard GB11607-89, with a salinity of 18‰ and a pH of 8.2; in mid-February , use trichlorfon and bleaching powder to disinfec...

Embodiment 2

[0036] The high-yield cultivation method of the Chinese mitten crab seedling in embodiment 2 specifically comprises the steps:

[0037] a. Construction of nursery ponds: build long-shaped nursery ponds running north-south, with an area of ​​680m2 2 , the width of the upper mouth of the nursery pond is 12m, the width of the bottom of the nursery pond is 7.5m, and the slope ratio is 1:1; the average water depth of the nursery pond is 2.0~2.2m; a scaffold is built with bamboo poles on the nursery pond, and the plastic film is covered on the frame. Greenhouse, 0.9 per m in nursery pool 2 The proportion of oxygen-increasing head;

[0038] b. Inlet water disinfection: The nursery pool starts to inflow water 20 days before the parent crabs hang the baskets and cloth seedlings. The water quality requirements of the inflow water must meet the fishery water standard GB11607-89, with a salinity of 21‰ and a pH of 8.4; in mid-February , use trichlorfon and bleaching powder to disinfect ...

Embodiment 3

[0046] The high-yield cultivation method of the Chinese mitten crab seedling in embodiment 3 specifically comprises the steps:

[0047] a. Construction of nursery ponds: build long-shaped nursery ponds running north-south, with an area of ​​700m2 2 , the width of the upper mouth of the nursery pond is 12m, the width of the bottom of the nursery pond is 7.5m, and the slope ratio is 1:1; the average water depth of the nursery pond is 2.0~2.2m; a scaffold is built with bamboo poles on the nursery pond, and the plastic film is covered on the frame. Greenhouse, 1 unit / m in nursery pool 2 The proportion of oxygen-increasing head;

[0048] b. Disinfection of water intake: The nursery pool begins to enter the water 20 days before the parent crabs hang the seedlings in the basket. The water quality requirements of the intake water must meet the fishery water standard GB11607-89, the salinity is 25‰, and the pH is 8.5; in mid-February , use trichlorfon and bleaching powder to disinfec...

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Abstract

The invention relates to a high-yield cultivation method of Chinese mitten crab seedlings. It is characterized in that it includes the steps of nursery pond construction, water inflow disinfection, parent crab hanging basket seedlings, bait feeding, water quality and water temperature regulation and control steps. The nursery ponds in the high-yield cultivation method of the present invention are reasonably constructed. By setting the nursery ponds in a long shape running north-south, the larvae will not cluster in high density in the morning and evening, and the survival rate of the larvae will be greatly improved. Using live rotifers as bait, the water quality is not easy to deteriorate, and the amount of water change is greatly reduced. It can achieve seedling emergence in advance. Compared with conventional earthen pond seedling cultivation, it can emerge more than 20 days earlier to meet the demand for early seedlings in some areas; and because of the early seedling cultivation, the natural water temperature is low, and many pathogenic microorganisms have not yet recovered, which greatly alleviates the the difficulty of disease control.

Description

technical field [0001] The invention relates to a high-yield cultivation method of Chinese mitten crab seedlings, belonging to the technical field of aquaculture cultivation. Background technique [0002] Chinese mitten crab (Eriocheir sinensis Milne-Edwards), also known as river crab, hairy crab, and hairy crab, is a large crustacean. It often migrates to the estuary where it goes out to sea every autumn to lay eggs. It hatches and develops from March to May of the next year. After becoming young crabs, they go up the river and continue to grow up in fresh water. The meat of river crab is fresh and tender, and it is a traditional high-grade aquatic product in my country. In recent years, due to people's development and utilization, its resources have declined rapidly. In 1981, 20,500 kg of natural crab seedlings were caught in the Yangtze River Estuary, but only 25 kg of natural crab seedlings were caught in 1982, and only 50 kg in 1987. To this end, scientists are activ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 黄金田吕富乔帼刘飞王峰唐玉江朱平沈永龙
Owner YANCHENG INST OF TECH
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