CN107211879B

CN107211879B - Seaweed cultivation seedling rope water layer adjusting device and adjusting method thereof

Info

Publication number: CN107211879B
Application number: CN201710654011.5A
Authority: CN
Inventors: 庞通; 刘建国
Original assignee: Institute of Oceanology of CAS
Current assignee: Institute of Oceanology of CAS
Priority date: 2017-08-02
Filing date: 2017-08-02
Publication date: 2022-09-06
Anticipated expiration: 2037-08-02
Also published as: CN107211879A

Abstract

The invention belongs to the technical field of seaweed cultivation, and particularly relates to a seaweed cultivation seedling rope water layer adjusting device and an adjusting method thereof. The raft comprises a raft frame, seedling ropes, floating balls and net bags, wherein the floating balls are arranged on two sides of the raft frame, the seedling ropes for hanging seedlings are bound in the middle of the raft frame, at least one net bag with a specific mesh number for filling sand is hung on each seedling rope, the mesh number for filling sand in the net bag is larger than that of the net bag, and the amount of sand filled in the net bag can be leaked out within 1-20 days under the action of water flow. The invention combines the characteristics of water flow velocity in sea area, has the advantages of environmental protection, easy operation and low cost, and can avoid the light damage of seaweed culture seedlings.

Description

Seaweed cultivation seedling rope water layer adjusting device and adjusting method thereof

Technical Field

The invention belongs to the technical field of seaweed cultivation, and particularly relates to a seaweed cultivation seedling rope water layer adjusting device and an adjusting method thereof.

Background

China is the world with the highest algae cultivation yield, wherein the cultivation varieties mainly comprise the maximum yield of asparagus, kelp and undaria pinnatifida. Seaweed is an indispensable raw material in many industries and is widely applied to the industries of food, medicine, chemical industry and the like. With the improvement of living standard and cognition standard of people, the demand of the common people dining table for the seaweed is rapidly increased year by year, and the market gap of the seaweed is further aggravated. The cultivation of the seaweed as a bulk product belongs to labor-intensive industries, although the market gap is increased year by year, the labor cost increased year by year also provides a serious test for the industries, along with the increase of the aging of the population, the seaweed cultivation industry in China is more urgent to need mechanization, and the mechanization of the seaweed industry has already reached a node which is not advanced or retreated at present.

The artificial scale cultivation of the asparagus adopts nutrition propagation, the asparagus is harvested once about twenty days, the whole old seedling rope is fished out from the sea and transported to the shore when the seedlings are harvested and divided every time, each cluster of seedlings is taken out from the gap of the old seedling rope, then good seedlings are selected and clamped in the gap of a new seedling rope one by one, and the head and the tail of each new clamped seedling rope are hung on a raft frame one by one after the seedlings are clamped. In the period from september to September in North China, in the season of high light and high temperature, the phenomenon that seedlings fade slightly and are whitened and rotten seriously after the asparagus are separated frequently occurs, hundreds of thousands of yuan of disease loss is caused every year, and the problem exists for a long time and has not been solved for decades in the asparagus cultivation. Related investigation is carried out for the problem, and generally a day is needed from the harvest of the asparagus seedlings to the suspension of the seedlings to a raft frame on the sea, sudden change of days is sometimes encountered, or workers are not properly arranged and managed, and the harvested seedlings are even required to be placed on the bank for overnight. Particularly, in the period of 7 to 9 months, the long-time dehydration, high temperature and high-density stacking in the season of high light and high temperature can aggravate the damage of the seedlings, particularly, the asparagus seedling ropes can be hung to surface water for cultivation after seedling division, the damaged seedlings are subjected to adverse environmental damage of high light and high temperature in the surface water during seedling division, and the phenomena that the seedlings fade slightly and are whitened and rotten frequently occur in the season even in a normal management mode after seedling division. According to the method, except for the management problem of a company, highlight and high-temperature damage after seedling hanging needs to be locked as key points for solving the seaweed whitening, the method for solving the problem that stones are added to deepen the breeding depth of the seedlings during initial seedling hanging, the stones are taken down after the danger period of a few days before, and the seedling ropes are lifted to the surface layer is tried, so that the damage of highlight and high-temperature surface layer after the damaged seedlings are initially hung can be greatly avoided, the situation that the seedlings are whitened and even rotten is reduced, however, the method needs to consume higher labor cost, water layers need to be adjusted for many times, and diesel energy power cost is consumed due to the fact that the water layers need to go out for many times. The quantity of fresh asparagus algae produced in China is about tens of thousands of tons every year, and meanwhile, tens of millions of seedling ropes are required to be repeatedly tied to the raft frame. In the cultivation process, a great amount of labor is required for the process of adding and removing the pendant stone head, and in recent years, with the aging of population, the labor cost of labor is increased sharply, and the increase of the labor cost of cultivation has been seriously examined for the cultivation of seaweed. Therefore, the way of hanging the seedling deeply by hanging the falling stones and then lifting the water layer is bound to consume more labor cost and cannot be executed, and the key of the asparagus cultivation industry is how to develop the way of being easy to operate and not greatly improving the cultivation labor cost.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a device for adjusting a rope water layer of a seaweed culture seedling and an adjusting method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

a seedling rope water layer adjusting device for seaweed cultivation comprises a raft frame, seedling ropes, floating balls and net bags, wherein a plurality of floating balls are arranged on two sides of the raft frame, a plurality of seedling ropes for hanging seedlings are bound in the middle of the raft frame, at least one net bag for filling sand is hung on each seedling rope, the number of meshes of the net bag for filling sand is larger than that of the net bag, and the amount of the sand filled in the net bag can be leaked within 1-20 days under the action of water flow.

The mesh bag is a nylon mesh with a 1-5-layer structure.

The mesh number of the mesh bag is 15-80 meshes.

The net bags are one and arranged in the middle of the seedling rope, or the net bags are two and arranged at two ends of the seedling rope respectively.

The seaweed cultivation seedling rope water layer adjusting device is arranged in a sea area with the water flow speed of 0-2 m/s.

A method for adjusting a seaweed cultivation seedling rope water layer by using the device comprises the following steps:

1) filling sand in the mesh bag, wherein the mesh number of the sand is larger than that of the mesh bag, sleeving 1-4 layers of mesh bags with the same mesh number outside the mesh bag, and fastening the bag opening;

2) clamping the seaweed culture seedlings in gaps of seedling ropes;

3) binding the seedling ropes at the initial stage of seedling hanging on a raft frame, and binding the mesh bags filled with sand on each seedling rope;

4) throwing into the sea area of specific water velocity with the raft frame that has bound seedling rope and pocket, utilizing the action of gravity of pocket will hang the seedling rope at seedling initial stage and keep in the water layer of predetermined degree of depth, under rivers and action of gravity, the sand in the pocket can run off gradually to make the seedling rope float out of the water surface in the settlement time, and then reach the mesh of automatic adjustment seedling rope breed degree of depth.

The water flow speed of the sea area where the seedling rope is thrown is 0-2 m/s.

The weight of sand filled in the mesh bag is 0.3-3 kg.

After the sand in the mesh bag is gradually lost, the seedling rope gradually floats out of the water surface within 1-20 days,

the seedling rope at the initial stage of seedling hanging is kept in a water layer with the depth of 50-200 cm by utilizing the gravity action of the mesh bag.

The invention has the advantages and beneficial effects that: the invention ties the seedling and ties the mesh bag on the seedling rope at the same time, recycles the mesh bag in the time of harvesting the seaweed, can automatically realize the culture of a deeper water layer during the initial seedling tying and a shallow water layer after the recovery period, and can greatly reduce the labor and energy power cost, save about millions of yuan of labor and energy cost every year in China and greatly reduce the light damage caused by strong light because the sand can also reduce the transparency of a water area at the initial seedling hanging stage. The mesh bag made of the nylon material is low in price and easy to manufacture, can be repeatedly used for about 2-3 years, is environment-friendly, low in cost and easy to popularize and apply.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1 is a raft frame, 2 is a seedling rope, 3 is a asparagus seedling, 4 is a floating ball, and 5 is a mesh bag.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the seaweed cultivation seedling rope water layer adjusting device provided by the invention comprises a raft frame 1, seedling ropes 2, floating balls 4 and mesh bags 5, wherein a plurality of floating balls 4 are arranged on both sides of the raft frame 1, a plurality of seedling ropes 2 for hanging seedlings are tied in the middle of the raft frame 1, at least one mesh bag 5 for filling sand is hung on each seedling rope 2, the mesh number of the sand filled in the mesh bag 5 is larger than that of the mesh bag 5, and the amount of the sand filled in the mesh bag 5 can be leaked out within 1-20 days under the action of water flow.

Further, the mesh bag 5 is a nylon mesh with a 1-5-layer structure, the mesh bag is sewn by a mesh with the mesh number of 15-80 meshes, sea sand with different weights, which is smaller than the mesh number of the mesh bag, is filled in the mesh bag, and the mesh bag 5 is sleeved with mesh bags with different mesh numbers and layer numbers.

The net bags 5 are one and are arranged in the middle of the seedling rope 2; or two mesh bags 5 are arranged at two ends of the seedling rope 2 respectively.

Further, the seaweed cultivation seedling rope water layer adjusting device is thrown in a sea area with the water flow speed of 0-2 m/s.

1) filling sand into the mesh bag 5, wherein the mesh number of the sand is larger than that of the mesh bag 5, sleeving 1-4 layers of mesh bags with the same mesh number outside the mesh bag 5, and then fastening the bag opening;

2) clamping the seaweed culture seedlings in the gaps of the seedling ropes 2;

3) tying seedling ropes 2 at the initial stage of seedling hanging on a raft frame 1, and tying mesh bags 5 filled with sand on each seedling rope 2;

4) throwing into the sea area of specific water flow speed raft frame 1 that will bind seedling rope 2 and pocket 5, utilizing the action of gravity of pocket 5 will hang seedling rope 2 at seedling initial stage and keep in the water layer of predetermined degree of depth, under rivers and action of gravity, sand in the pocket 5 can run off gradually to make seedling rope 2 float out of the water surface in the settlement time, and then reach the purpose of the automatic adjustment seedling rope degree of depth of breeding.

Furthermore, the water flow speed of the sea area where the seedling rope 2 is put into is 0-2 m/s, and the weight of sand filled in the mesh bag 5 is 0.3-3 kg. The seedling rope 2 at the initial stage of seedling hanging is kept in a water layer with the depth of 50-200 cm by utilizing the gravity action of the mesh bag 5. The time for the seedling rope 2 to float to the surface layer again is controlled by utilizing the difference of the sea sand amount in the mesh bags 5 and the difference of the mesh number and the layer number of the mesh bags. Under the action of water flow and gravity, the sand in the mesh bag 5 can gradually run off; when the sand runs off, the seedling rope 2 gradually floats out of the water surface within 1-20 days under the action of water flow and buoyancy, and the effect of automatically adjusting the breeding depth of the seedling rope is further achieved.

Example one

1. A rectangular mesh bag is sewn by using a 18-mesh nylon net, the mesh bag is 15 cm wide and 30 cm long, 1.4 kg of sea sand capable of passing through a 20-mesh screen is filled in the mesh bag, two layers of 18-mesh bags are sleeved outside the mesh bag, and the pockets are fastened by using nylon ropes.

2. 3 strands of 300-filament polyethylene ropes are used for clamping the asparagus seedlings in gaps, a bunch of seedlings are clamped every 5 cm, the length of each seedling rope is 5.5 m, the number of the clamped seedlings is about 30, and the weight of each seedling rope is about 3 jin.

3. When the asparagus seedling rope is tied to the raft frame, a mesh bag is tied in the middle of the seedling rope, the seedling rope at the seedling hanging initial stage is kept on a deeper water layer by utilizing the gravity of the mesh bag, the flow velocity of water flow where the seedling rope is located is 0-0.2 m/s, sand slowly runs off from the nylon mesh bag under the action of water flow and gravity, and when the sand runs off, the seedling rope gradually floats to the water surface within 2-7 days under the action of water flow and buoyancy. The method saves more than 50% of labor and reduces the albino probability of the asparagus seedlings by 80%.

Example two

1. A rectangular mesh bag is sewn by using a 50-mesh nylon net, the mesh bag is 20 cm wide and 30 cm long, 2 kg of sea sand capable of passing through a 60-mesh screen is filled in the mesh bag, a 50-mesh bag is sleeved outside the mesh bag, and the pocket is fastened by using a nylon rope.

3. When the asparagus seedling rope is tied to the raft frame, the two ends of the raft frame are respectively tied with a mesh bag, the seedling rope at the seedling hanging initial stage is kept in a deeper water layer by utilizing the gravity of the mesh bags, the flow velocity of water flow at which the seedling rope is located is 0-0.4 m/s, sand is slowly lost from the nylon mesh bag under the action of the water flow and the gravity, and when the sand is lost, the seedling rope gradually floats to the water surface within 2-7 days under the action of the water flow and the buoyancy. The method saves more than 50% of labor and reduces the albino probability of the asparagus seedlings by 80%.

EXAMPLE III

1. A rectangular mesh bag is sewn by using a 60-mesh nylon net, the size of the mesh bag is 30 cm wide and 30 cm long, 2 kg of sea sand capable of passing through a 70-mesh screen is filled in the mesh bag, and a layer of 60-mesh bag is sleeved outside the mesh bag.

2. The asparagus seedlings are clamped in the gaps of the asparagus seedlings by 300-filament 3-strand polyethylene ropes, one bunch of seedlings is clamped every 5 cm, the length of each seedling rope is 5.5 m, the number of the clamped seedlings is about 30, and the weight of each seedling rope is about 3 jin.

3. When the asparagus seedling rope is tied to the raft frame, net bags are tied at two ends of the seedling rope, the seedling rope at the seedling hanging initial stage is kept on a deeper water layer by utilizing the gravity of the net bags, the flow velocity of water flow where the seedling rope is located is 0-0.7 m/s, sand slowly runs off from the nylon net bag under the action of water flow and gravity, and when the sand runs off, the seedling rope gradually floats to the water surface within 2-7 days under the action of water flow and buoyancy. The method saves more than 50% of labor and reduces the albino probability of the asparagus seedlings by 80%.

The net bag is tied on the seedling rope while the seedlings are tied, a deeper water layer during initial tying of the seedlings and shallow water culture after recovery can be automatically realized, in addition, the sand can also reduce the transparency of a water area at the initial stage of seedling hanging, the labor cost can be greatly reduced, about millions of yuan of labor cost is saved every year in China, and the light damage caused by strong light is greatly reduced.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. The seaweed cultivation seedling rope water layer adjusting device is characterized by comprising a raft frame (1), seedling ropes (2), floating balls (4) and net bags (5), wherein the floating balls (4) are arranged on two sides of the raft frame (1), a plurality of seedling ropes (2) used for hanging seedlings are tied in the middle of the raft frame (1), at least one net bag (5) used for filling sand is hung on each seedling rope (2), the mesh number of the sand filled in each net bag (5) is larger than that of each net bag (5), and the amount of the sand filled in each net bag (5) can be leaked out within 1-20 days under the action of water flow;

the mesh bag (5) is a nylon mesh with a 1-5-layer structure; the mesh number of the mesh bag (5) is 15-80 meshes;

the seaweed cultivation seedling rope water layer adjusting device is arranged in a sea area with the water flow speed of 0-2 m/s;

the net bags (5) are arranged in the middle of the seedling rope (2), or the net bags (5) are arranged at two ends of the seedling rope (2) respectively.

2. A method for adjusting the water layer of a seaweed cultivation seedling rope by using the device of claim 1, which comprises the following steps:

1) filling sand into the mesh bag (5), wherein the mesh number of the sand is larger than that of the mesh bag (5), sleeving 1-4 layers of mesh bags with the same mesh number outside the mesh bag (5), and then fastening the bag opening;

2) clamping the seaweed breeding seedlings in the gaps of the seedling ropes (2);

3) tying seedling ropes (2) at the initial stage of seedling hanging on a raft frame (1), and tying mesh bags (5) filled with sand on each seedling rope (2);

4) throwing the raft frame (1) bound with the seedling ropes (2) and the mesh bags (5) into a sea area with a specific water flow speed, keeping the seedling ropes (2) at the initial stage of seedling hanging at a water layer with a preset depth by utilizing the gravity action of the mesh bags (5), and gradually losing sand in the mesh bags (5) under the action of water flow and gravity, so that the seedling ropes (2) float out of the water surface within a set time, and further the purpose of automatically adjusting the cultivation depth of the seedling ropes is achieved;

the water flow speed of the sea area thrown into the seedling rope (2) is 0-2 m/s;

the weight of sand filled in the mesh bag (5) is 0.3-3 kg.

3. The method as claimed in claim 2, wherein the seedling string (2) gradually floats out of the water surface within 1-20 days after the sand in the mesh bag (5) is gradually lost.

4. The method as claimed in claim 2, wherein the seedling string (2) at the initial stage of seedling hanging is maintained in a water layer of 50-200 cm depth by the gravity of the mesh bag (5).