Winter crayfish seedling strengthening pool and strengthening method

Abstract

The invention relates to a pond and a method for strengthening young crayfish in winter. The young crayfish strengthening pond in winter comprises a first culture pond used for strengthening young crayfish, a first waterwheel type aerator is installed at the corner of the first culture pond, and a plurality of sunshade nets are hung in water of the first culture pond at intervals and used for sheltering the young crayfish; the second culture pond is used for culturing algae and plankton, the second culture pond is connected with the first culture pond through a nylon net, a second waterwheel type aerator is installed in the second culture pond, and the second waterwheel type aerator is arranged at the relative corner away from the first waterwheel type aerator; the duck shed is mounted on the side, away from the first culture pond, of the second culture pond and connected with the second culture pond through a slope; wherein a greenhouse is arranged above the first culture pond and the second culture pond in a covering mode. Compared with the prior art, the strengthening pond and the strengthening method provided by the embodiment of the invention can be used for strengthening only 15-20 days, so that the strengthening period is greatly prolonged, the procambarus clarkii can appear on the market in advance, and the competitiveness is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture, and in particular to a winter crayfish seedling strengthening pond and a strengthening method. Background Art

[0002] Crayfish is an arthropod of the family Acaridae in the order Decapoda. It has a hard shell, body colors include red, reddish brown, pink, and dark red on the back. There is a wedge-shaped stripe on the back of the abdomen. Its claws are narrow and long. Its claws are dark red and black with bright orange or reddish nodules. Its head is pointed and long. Its body is large and cylindrical. It has filamentous gills and has tentacles on its head. Crayfish farming is done by centrally raising crayfish in a breeding pond and selling them after they grow to a certain size.

[0003] Under natural conditions, the eggs produced by crayfish in winter are difficult to separate from the mother's body and grow, so they are usually put on the market later in the second year.

[0004] In order to put crayfish on the market as early as possible in the spring of the following year, human intervention can be used. Crayfish seedling support refers to the cultivation of hatched crayfish seedlings to a stage of 5 to 6 cm in length. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the eggs produced by crayfish in the prior art in winter are difficult to separate from the mother body and grow, resulting in a late listing time in the second year.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, a winter crayfish seedling support pond is provided, which comprises:

[0007] A first breeding pond is used to support and strengthen crayfish seedlings. A first waterwheel-type aerator is installed in a corner of the first breeding pond. A plurality of sunshade nets are hung in the water of the first breeding pond to serve as a shelter for the crayfish seedlings.

[0008] a second culture pond, for cultivating algae and plankton, the second culture pond being connected to the first culture pond through a nylon net, a second waterwheel aerator being installed in the second culture pond, and the second waterwheel aerator being arranged at an opposite corner away from the first waterwheel aerator;

[0009] A duck shed is installed on the side of the second breeding pond away from the first breeding pond and connected to the second breeding pond via a slope;

[0010] Wherein a greenhouse is arranged above the first breeding pond and the second breeding pond.

[0011] Preferably, a temperature control device is installed in the greenhouse for heating.

[0012] Preferably, the first breeding pond comprises a plurality of cross bars, the cross bars are fixed above the first breeding pond, and a sunshade net is hung above each of the cross bars.

[0013] Preferably, the nylon mesh is a 10-mesh mesh.

[0014] Preferably, the plankton is Daphnia.

[0015] Preferably, the Daphnia pulex is Daphnia magna.

[0016] Preferably, it also includes an isolation net, which physically isolates the duck shed from the second breeding pond.

[0017] According to another aspect of the present invention, a method for strengthening crayfish seedlings in winter is provided, which comprises the following steps:

[0018] The first step is site selection and reconstruction: select a freshwater pond and build any of the above winter crayfish seedling support ponds;

[0019] The second step is to raise ducks in the duck shed and flush the duck manure produced into the second breeding pond;

[0020] The third step is to cultivate algae and plankton in the second cultivation pond;

[0021] Step 3: the plankton is driven to move to the first culture pond by the second waterwheel aerator;

[0022] In the fourth step, the first waterwheel aerator drives the water in the first breeding pond to move to the second breeding pond.

[0023] Preferably, the first waterwheel-type aerator and the second waterwheel-type aerator operate alternately.

[0024] Preferably, the first waterwheel aerator and the second waterwheel aerator operate for 4 hours per day.

[0025] Compared with the prior art, the technical solution provided by the embodiments of the present invention can at least achieve the following beneficial effects:

[0026] First, it only takes 15 to 20 days to grow crayfish using the growth pond and growth method provided in this embodiment, which greatly improves the growth cycle, facilitates the early listing of crayfish, and improves competitiveness;

[0027] Second, the crayfish seedlings strengthened in this embodiment feed on live plankton, so the survival rate is high, which is twice as high as the survival rate of winter seedlings strengthened under natural conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0029] Figure 1 A schematic diagram of the planar structure of a winter crayfish seedling growth pond provided in this embodiment. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

[0032] Example 1

[0033] refer to Figure 1 The present embodiment provides a winter crayfish seedling support pond, comprising a first breeding pond 10, a second breeding pond 20 and a duck shed 30. In order to provide stable temperature and light for the organisms in the first breeding pond 10 and the second breeding pond 20, a shed is built above the first breeding pond 10 and the second breeding pond 20.

[0034] The first breeding pond 10 is used to strengthen the crayfish seedlings. In order to ensure the timely replacement of the water and oxygenation of the first breeding pond 10, a first waterwheel-type aerator 13 is installed in the first breeding pond 10. A plurality of sunshade nets are hung in the water of the first breeding pond 10 for the crayfish seedling shelter. Specifically, the first breeding pond includes a plurality of cross bars 12, which are fixed above the first breeding pond, and a sunshade net is hung above each cross bar 12. The plurality of cross bars 12 are arranged in parallel at intervals, and the spacing between adjacent cross bars is 30cm. Preferably, the bottom of the first breeding pond 10 is laid with non-woven fabrics and 80 mesh nets in sequence to prevent the crayfish seedlings from contacting the bottom soil of the pond to produce earthy smell. In order to increase the clarity of the water quality of the crayfish seedlings, a layer of pebbles can also be laid above the 80 mesh net, and the gaps in the pebbles layer are used to precipitate the feces of the crayfish seedlings, etc. The particle size of the pebbles is preferably 5cm and the thickness is 5cm.

[0035] The second culture pond 20 is used for cultivating algae and plankton. Preferably, the plankton is Daphnia, and the Daphnia is a large Daphnia. The second culture pond 20 is connected to the first culture pond 10 by a nylon net 11 to prevent crayfish seedlings from entering the second culture pond 20. Preferably, the nylon net is 10 mesh, and the specific shape of the nylon net 11 is designed according to actual needs. In order to ensure timely replacement of water and oxygenation in the second culture pond 20, a second waterwheel-type aerator 21 is installed in the second culture pond 20, and the second waterwheel-type aerator 21 is located in a relative corner away from the first waterwheel-type aerator 13, so as to facilitate the material circulation of the first culture pond 10 and the second culture pond 20. The zooplankton in the second culture pond 20 is brought to the first culture pond 10 to provide live zooplankton as food for the crayfish seedlings, greatly improving the survival rate of the crayfish seedlings. At the same time, the gaps in the pebble layer in the first culture pond 10 are conducive to the growth of zooplankton.

[0036] In order to provide a suitable growth temperature for the crayfish seedlings, it is preferred that a temperature control device is installed in the greenhouse for heating to cope with the cold winter.

[0037] The duck shed 30 is installed on the side of the second breeding pond away from the first breeding pond, and is connected to the second breeding pond 20 through a slope 31, so that the duck manure in the duck shed 30 can be flushed into the second breeding pond 20. Preferably, the slope 31 is made of cement for easy flushing. The duck manure falls into the second breeding pond 20 by cleaning the duck shed or flushing the second breeding pond 20 with water. In order to prevent the ducks from eating the organisms raised in the second breeding pond 20, an isolation net 31 is also required to physically isolate the duck shed 30 from the second breeding pond 20.

[0038] The method for supporting crayfish seedlings in winter comprises the following steps:

[0039] The first step is site selection and reconstruction: select a freshwater pond and build the above-mentioned winter crayfish seedling support pond;

[0040] Step 2: raising ducks in the duck shed, and flushing the duck manure produced into the second breeding pond 20;

[0041] The third step is to cultivate algae and plankton in the second cultivation pond 20;

[0042] In the third step, the plankton is driven by the second waterwheel aerator 21 to move to the first culture pond 10;

[0043] In the fourth step, the first waterwheel aerator 13 drives the water in the first breeding pond 10 to move to the second breeding pond 20.

[0044] The first waterwheel aerator 13 and the second waterwheel aerator 21 are operated alternately, preferably for 4 hours a day, for example, the first waterwheel aerator is operated for 4 hours in the morning, and the second waterwheel aerator is operated for 4 hours in the afternoon.

[0045] In this embodiment, the area of ​​the first breeding pond is 500 square meters, the water depth is 1.5 meters, the crayfish seedlings put in are hatched in the greenhouse in winter, and the size is 5 to 6 cm in length when they are fished out after 15 to 20 days; the area of ​​the second breeding pond 20 is 300 square meters; the area of ​​the duck shed 30 is 100 square meters, and about 50 ducks are bred.

[0046] It takes 2 months to strengthen winter seedlings under natural conditions, but only 15 to 20 days are needed using the strengthening pond and method provided in this embodiment, which greatly improves the strengthening period, facilitates the early listing of crayfish, and improves competitiveness. At the same time, the crayfish seedlings strengthened in this embodiment have a high survival rate because they feed on live plankton, which is twice the survival rate of winter seedlings strengthened under natural conditions.

[0047] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A winter crayfish seedling support pond, characterized in that: include: A first breeding pond is used to support and strengthen crayfish seedlings. A first waterwheel-type aerator is installed in a corner of the first breeding pond. A plurality of sunshade nets are hung in the water of the first breeding pond to serve as a shelter for the crayfish seedlings. a second culture pond, for cultivating algae and plankton, the second culture pond being connected to the first culture pond through a nylon net, a second waterwheel aerator being installed in the second culture pond, and the second waterwheel aerator being arranged at an opposite corner away from the first waterwheel aerator; A duck shed is installed on the side of the second breeding pond away from the first breeding pond and connected to the second breeding pond via a slope; Wherein a greenhouse is arranged above the first breeding pond and the second breeding pond.

2. The winter crayfish seedling strengthening pond according to claim 1, characterized in that: A temperature control device is installed in the greenhouse for heating.

3. The winter crayfish seedling support pond according to claim 1, characterized in that: The first breeding pond comprises a plurality of cross bars which are fixed above the first breeding pond, and a sunshade net is hung above each of the cross bars.

4. The winter crayfish seedling strengthening pond according to claim 1, characterized in that: The nylon net is a 10-mesh net.

5. The winter crayfish seedling strengthening pond according to claim 1, characterized in that: The plankton is Daphnia.

6. The winter crayfish seedling strengthening pond according to claim 5, characterized in that: The Daphnia pulex is Daphnia pulex.

7. The winter crayfish seedling support pond according to claim 1, characterized in that: It also includes an isolation net, which physically isolates the duck shed from the second breeding pond.

8. A method for strengthening crayfish seedlings in winter, characterized in that: The steps include: The first step is site selection and reconstruction: select a freshwater pond and build a winter crayfish seedling support pond as described in any one of claims 1 to 7; The second step is to raise ducks in the duck shed and flush the duck manure produced into the second breeding pond; The third step is to cultivate algae and plankton in the second cultivation pond; Step 3: the plankton is driven by the second waterwheel aerator to move to the first culture pond; In the fourth step, the first waterwheel aerator drives the water in the first breeding pond to move to the second breeding pond.

9. The method for strengthening crayfish seedlings in winter according to claim 8, characterized in that: The first waterwheel-type aerator and the second waterwheel-type aerator operate alternately.

10. The method for strengthening crayfish seedlings in winter according to claim 9, characterized in that: The first waterwheel aerator and the second waterwheel aerator are operated for 4 hours every day.

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