KR20210109957A - Aquaculture system of paddy field by using tilapia and king crab - Google Patents

Abstract

The present invention relates to a complex paddy field aquaculture system for tilapia and mitten crabs, which includes a cultivation space capable of cultivating tilapia and mitten crabs, which can be harvested in a short term and do not generate interspecies competition ecologically, in paddy fields in a complex manner and facilitating catch, thereby suppressing growth of weeds and controlling pests to enable eco-friendly rice farming. According to the present invention, the complex paddy field aquaculture system comprises: a waterway built on paddy fields to facilitate feed supply and capture of tilapia; an injection water supply unit supplying water to the paddy fields; an overflow type outlet preventing the water of the paddy fields from rising above a predetermined water level; a first escape prevention film buried on the upper surface of an edge of a paddy bank of the paddy fields so that the inside of the paddy bank is covered; a second escape prevention film installed upright from the edge of the paddy bank to the upper part; and a catch container installed on the paddy field to receive fallen mitten crabs.

Description

{Aquaculture system of paddy field by using tilapia and king crab}

The present invention relates to a paddy field ecological culture system for tilapia and snow crab, and more specifically, to provide a breeding space capable of complex growth and easy capture of tilapia and snow crab that can be harvested for a short period in paddy fields and have no ecologically interspecies competition. It relates to a rice paddy eco-culture system of tilapia and blue crab that is equipped to suppress weed growth and control diseases and pests to enable eco-friendly rice farming.

In general, what is important in eco-friendly agriculture is that the optimal farming method should be carried out by selecting a suitable site, applying the most appropriate farming method within the selected environment, and adopting an appropriate crop and management system through this. Based on such a system, successful eco-friendly agriculture can be achieved only when proper soil fertility management for fertility enhancement, application of pest and weed control technology, and efficient execution through maintenance of the system are achieved.

In particular, the most difficult point of the eco-friendly farming method in paddy agriculture is that the yield reduction due to weeds caused by the prohibition of the use of herbicides in eco-friendly and safe agricultural product cultivation areas is very large. Therefore, when cultivating using eco-friendly farming methods in paddy fields, eco-friendly farming methods should be excluded in geographically unfavorable areas, and it is very important to keep the soil surface constant through leveling work.

Recently, with the improvement of living standards and increasing interest in health, safe agricultural products are required, and eco-friendly organic farming that can continuously produce agricultural products without polluting the environment and obtaining appropriate income. Ecology using rice paddies and idle farmland Forms are being tried.

In the case of paddy ecology using ducks, troughs are formed in the places where ducks pass while they are active, and although it is weak in paddy rice, it is covered with a little soil, and the germination conditions of weeds that most of them are exposed to sunlight are poor, thereby suppressing weed generation. do. However, ducks do not eat well if their leaves are long or rough, so manual weeding is required for blood, etc.

On the other hand, tilapia is a tropical freshwater fish, native to southern Kenya and South Africa, and is a fish species belonging to the order Cichildae. It grows and has strong resistance to environmental changes, and it can survive even in low dissolved oxygen, so it can be cultured at high density.

Tilapia mainly lives in the lower reaches of rivers, but it adapts well to changes in water quality or salinity and inhabits lakes and swamps. It acts as a blender.

In addition, blue crabs are omnivorous, so they eat pests and weeds to control diseases and pests, and through vigorous nighttime activities, the soil is turned over and the water is turbid, thereby promoting the growth of rice roots. serves as a supplier.

KR 10-1322266 KR 10-0139567 (Patent Publication No. 0003) KR 10-2013-0140495

The present invention provides a breeding space for facilitating overall breeding management such as tilapia and snow crab activities, feed supply, capture, etc. without ecologically interspecies competition in paddy fields, and prevents the escape of tilapia and snow crab. It is to provide a paddy ecology system of tilapia and snow crab that allows for complex growth and eco-friendly rice farming.

The present invention is constructed in paddy fields to facilitate the capture of feed and tilapia, a water channel, an injection water supply unit for supplying water to the cultivated land, and an over for preventing the water in the cultivated land from rising above a certain water level A flow-type outlet, a first escape barrier buried in the upper surface of the rice paddy edge of the cultivated land to cover the inside of the paddy field, and a second escape barrier installed upright from the edge of the paddy field to the top, and installed on the paddy field to catch crabs It features a combined paddy field eco-culture system of tilapia and snow crab that includes a catch container that allows it to be dropped.

It is characterized in that it is provided with a landmark planting portion protruding above the water surface at the boundary line between the cultivated land and the waterway.

It is characterized in that at the boundary line between the waterway and the cultivated land, a waterway bottom surface having a gradually inclined wall surface is formed.

The injection water supply part is installed on the side where the water channel is, and the overflow type outlet is installed on the side with the opposite discharge water channel.

The first anti-escape film is provided with a synthetic resin mesh, and the second anti-escape film is provided with a synthetic resin film with a smooth surface.

The rice paddy ecology system of tilapia and snow crab according to the present invention enables the complex growth of tilapia and snow crab by a breeding space that facilitates overall breeding management such as tilapia and snow crab activities, feed supply, and capture in paddy fields. It has an economic effect that can greatly increase the income of farmers by improving the quality of rice and making eco-friendly rice farming possible.

1 is a perspective view schematically showing the rice paddy ecology system of tilapia and crab according to the present invention.
Figure 2 is a plan view schematically showing the rice paddy ecology system of tilapia and crab according to the present invention.
Figure 3 is a cross-sectional view of a portion of the cultivated land in the rice paddy ecology system of tilapia and crab according to the present invention.
Figure 4 is a cross-sectional view showing the shape of the inclined wall of the waterway in the rice paddy ecology system of tilapia and crab according to the present invention.
Figure 5 is a cross-sectional view showing a landmark planting of a pile between the paddy field and the waterway in the rice paddy ecology system of tilapia and crab according to the present invention.
Figure 6 is an exemplary cross-sectional view when installing the first escape barrier on the rice paddy in the rice paddy ecology system of tilapia and crab according to the present invention.
7 is a photograph showing the installation process of the first and second escape barriers in the rice paddy ecology system of tilapia and crab according to the present invention.
Figure 8 is a photograph of the installation state of the second escape barrier in the rice paddy ecology system of tilapia and crab according to the present invention.
Figure 9 is a cross-sectional view of the installation state of the capture container for catching the crab on the rice paddy in the rice paddy ecology system of tilapia and crab according to the present invention.
10 is a photograph showing an embodiment of a paddy field to which the paddy ecology system of tilapia and crab according to the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

The present invention cultivates rice in an eco-friendly way in paddy fields, understands the effects on the growth rate and survival rate of tilapia and snow crabs in cultivated fields during the growing period of rice, and analyzes economic efficiency and efficiency through this to realize an optimized paddy ecology complex. It is related to the rice paddy ecology system of tilapia and snow crab.

The rice paddy ecology system of tilapia and snow crab of the present invention is constructed in the paddy field 10 to facilitate feed supply and capture of tilapia, and a water channel 20 and injection for supplying water to the cultivated land 10 The water supply unit 40, the overflow type outlet 50 for preventing the water in the cultivated land 10 from rising above a certain water level, and the rice paddy (A) of the cultivated land 10 are buried at a certain depth and The inner end of the paddy field A has a first escape barrier 60 embedded in the paddy field to a certain depth, a second escape barrier 70 installed upright from the edge of the paddy field A, and the paddy field (A). It is installed in A) to include a catch container 80 that allows the crab to fall.

The water channel 20 is built in a part of the cultivated land 10, and the area of the water channel 20 is an extremely narrow ratio compared to the unit area for cultivating rice in the cultivated land 10, while minimizing the decrease in the cultivated land of rice. To facilitate the movement of tilapia and provide a space for feeding, the area of this water channel 20 is ^{formed within about 0.3 m 2} to 0.5 m ² , and the depth of the water channel 20 is cultivated land (10). ), preferably to have a depth of about 20 to 40 cm from the bottom surface.

That is, the arrangement of the water channel 20 according to the present invention performs a feed supplying function so that tilapia and snow crabs, which are subjected to complex paddy ecology, can eat food evenly in a predetermined place, so the feed supplied to the feed supply site. In order to make it easy to control feed according to the amount of food eaten, and to minimize water pollution, leave an interval of about 50 cm along the four edges of the rice planting site of the cultivated land (10), and feed the four floated sides. The present invention is not limited thereto since it may be arranged so that the tilapia or crab can be eaten evenly, or the rice can be left as it is without planting it in one corner of the cultivated land 10 .

The water channel 20 cannot clearly distinguish the boundary line between the cultivated land 10 and the water channel 20 before planting in a state where the cultivated land 10 is filled with water. In order to make it clear, it is preferable to provide a landmark planting part 32 protruding above the water surface using a stake or string in the boundary line 30 part so as to increase the discrimination power of the space where the water channel 20 is installed.

In addition, at the boundary line 30 of the waterway 20 and the cultivated land 10, the waterway bottom surface 24 with the inclined wall surface 22 is formed gradually to ensure the stability of the waterway 20 and the movement of the blue crab It is preferable to make it easy.

The cultivated land 10 according to the present invention is provided with an injection water supply unit 40 and an overflow type outlet 50, respectively, so that the water level of the cultivated land 10 is always kept constant, but while tilapia is cultivated, the cultivated land 10 The water level is maintained within 15 to 20 cm so that the activities of tilipia and snow crabs in the cultivated land 10 can be smoothly performed without interfering with the growth of rice.

The pipe for installing the injection water supply unit 40 and the overflow type outlet 50 in the arable land 10 is laid out on the floor after the ground is compacted, but the injection water supply unit 40 is installed on the side where the drainage is located and the opposite side An overflow type outlet (50) is installed on the side where the discharge drain is located.

That is, the injection water supply unit 40 and the overflow type outlet 50 are installed on the opposite side of the cultivated land so that the clean water injected does not mix with the discharged drainage, and the water circulates through the entire paddy field in a zigzag pattern between the cultivated fields. In this case, it is preferable to install a blocking net so that crabs, fish, etc. do not escape at the last pipe entrance of the drain pipe, although the connecting passage between the cultivated fields is connected with a drain pipe.

And, depending on the shape or size of the paddy field 10, the type of the farm system can be provided in various ways, and the water injection part 40 and the overflow type outlet 50 to the farmland 10 and the water channel 20. Since it can also be installed in a configuration in which a plurality of are arranged and then interconnected through a plurality of pipes, the present invention is not limited thereto.

The first escape barrier 60 is provided with a synthetic resin mesh (mosquito net, etc.) that the crab cannot penetrate while having a water-permeable function. In order to prevent this from happening, an escape prevention facility is installed on the ground between the rice paddy and the paddy field, but it is an escape prevention facility that can prevent the crabs from digging into the bank. It is desirable to be buried at a depth of about 300mm from A) and about 300mm from the bottom of the paddy field.

The second anti-escape film 70 is made of a smooth synthetic resin film and is installed to a height of about 600 mm from the edge of the paddy field A to the top to prevent the crab from escaping to the outside of the paddy field.

That is, the crab has 8 legs and 2 tongs legs, so it climbs up well and runs away, so to prevent the crab from escaping from the cultivated land 10, a second escape barrier 70 is installed, but the second installed upright The escape barrier 70 is made of a material having a smooth surface that is slippery and cannot climb.

The height of this second escape barrier 70 is installed about 600 mm from the paddy field A, and it is preferable to be buried in the soil at a depth of 30 cm from the paddy field A. is installed flat on the pole fixed to the paddy field (A) to prevent the escape of the snow crab.

That is, it is preferable that the second anti-epilation film 70 is made of a tarpaulin material that is light and durable and has a smooth surface that a crab cannot easily climb on.

The capture container 80 is designed to be used for catching crabs, and the crabs have a nocturnal property that moves at night. To be installed, it is preferable that the capture container 80 has a depth of about 600 mm from the paddy field A to facilitate capture and harvesting. It is preferable to use it by blocking it with a cover (not shown).

In other words, using the nocturnal nature of snow crabs to come out at night to harvest snow crabs, they dig deep at one end of the paddy field to catch snow crabs that gather in the deeper dugs of that side. Blue crabs are nocturnal, crawl from paddy fields to paddy banks and migrate in a series of sequences along the escape barrier. Dig the ground in the four corners of the rice paddy and plant plastic containers. The crab falls into a plastic trap installed on the floor while moving along the escape barrier placed on the bank of the rice paddy at night.

The process of installing the first and second anti-escape films 60 and 70 is as follows.

First, make the rice paddy bank firmly with a fork crane, then dig the entire edge of the paddy field with a pickaxe about 40 cm, and install iron piles at intervals of 1 m.

Next, the first and second escape barriers 60 and 70 are tied and fixed with wire from the beginning to the end of the pile, and then the first and second escape barriers 60 and 70 are tied in the direction outside the paddy field of the iron stake so that the crab can crawl out. A nylon string supporting the first and second escaping barriers 60 and 70 is connected between the pillars, which are the posts, and the pillars.

Then, the evacuation barrier and iron stakes are firmly buried to the top of the paddy field with soil and fixed. Then, the first evacuation barrier 60 is dug 30cm from the bottom of the paddy field and wraps the entire paddy field. put it together and ask

As described above, the rice paddy ecology system of tilapia and snow crab of the present invention is also very economical, and it is described by examples as follows.

First, the present invention is a system for complex aquaculture while enabling eco-friendly rice farming. Tilapia and snow crab are ecologically free from interspecies competition and consume the same feed and organic matter, and tilapia is a vegetable fish and the crab is omnivorous And it was made to be a complex culture by taking advantage of the characteristic of eating dead carcasses.

Tilapia continuously swims in the cultivated land and sweeps the soil at the bottom of the paddy field to facilitate the air circulation in the land to promote the growth of rice. prevent.

In other words, as tilapia swims and moves around in the paddy field and stirs the surface soil, weeds float on the water without even having time to take root, and the water becomes cloudy and shades the light, so weed germination and growth are suppressed. Even when the weed roots start to grow, they are constantly stirred, so it is difficult for the roots to settle in the soil, and when the mud is stirred, a sticky layer is formed and the weed seeds are buried. Since it is managed with deep water, weed germination is suppressed by the reducing effect and there is a weed control effect. Also, when the water becomes cloudy, the water temperature and ground temperature drop slightly, which also inhibits the germination of weeds.

In addition, tilapia stimulates rice roots, supplies oxygen, and eats harmful pests in the process of stirring the surface soil in the cultivated land 10 Together, effective tilapia culture is achieved during the growing period of rice.

And, the crab is omnivorous and eats pests and weeds in the cultivated land 10 to control pests and pests, and suppresses the growth of weeds by turning the soil over and making the water turbid with vigorous nighttime activity.

On the other hand, when the water level of the cultivated land 10 is gradually lowered by using a water pump or the like to harvest the tilapia cultured in the cultivated land 10 . The tilapia in the cultivated land 10 is gathered toward the waterway 20 containing a lot of water, so that it is possible to facilitate the harvest of the tilapia through the waterway 20 .

In addition, at the time of harvesting crabs in the cultivated land 10, the rice is harvested in a state in which the water level of the paddy floor is lowered by draining the cultivated rice immediately before the harvest time, and then draining the water in the cultivated land 10, and a catch container (80) The crabs that enter the farm are collected and the size of the shipment is selected. In the case of the crabs that are not large enough to the shipment size, they are put in the wintering equipment in the prepared wintering area for wintering, and then used for cultivating rice the following year.

The test species was stocked with 125 tilapia, which is a vegetable, and omnivorous snow crab, at a density of 39g (2.4)/m2 in 3 sections of paddy ecology farmland made up of 518m2 of tilapia, and 35g (10) of blue crabs. At a density of /m2, 5200 rice were stocked in one cell and were bred for /126 days. Both crab and tilapia were fed only tilapia feed.

In the case of tilapia, 16 g of 2 month-old seedlings were stocked at a density of 2.4 birds/m2 after hatching and mixed with blue crabs for 126 days. and the survival rate became 100% (Table 1).

In the case of blue crab, seedlings of 3.5 g size were stocked at a density of 10 birds/m2, and as a result of breeding for 126 days, the average growth of each individual was 42 g in the combined test group bred with tilapia, which was 4 g more than the single test group bred alone. The total production and survival rate were also higher than the 47kg and 35% in the single breeding group at 87kg and 42%, respectively.

Experimental results of polyculture of crab and tilapia in paddy fields division Standing weight (g) breeding density
(Marie/㎡) breeding period
(Work) Final growth (g) total production
(kg) survival rate
(%) FCR complex form

(Pond Ⅰ) tilapia 16 2.4 126 320 40 100 0.8 crab 3.5 10 126 42 87 42 0.6 single style

(Pond Ⅱ) tilapia 16 2.4 126 304 38 100 0.8 single style

(Pond Ⅲ) crab 3.5 10 126 38 47 35 0.65

The above experimental result is due to the ecological role of tilapia shaking the sediment by going back and forth to eat phytoplankton in a complex culture, and the excrement of tilapia is decomposed and these become an energy source of phytoplankton. The excrement of tilapia becomes organic matter, and this organic matter becomes food for zooplankton and phytoplankton, and tilapia grows by eating this organic matter, zooplankton and phytoplankton. This is because food such as organic matter, phytoplankton and zooplankton generated in the complex aquaculture conditions of rice crab and tilapia in paddy ecology is always abundant due to the excrement of cultured animals, so it grows well even with a small feed supply.

According to the present invention, the results of rice yield and rice quality were compared in the area where tilapia and blue crab were mixed and cultivated by an eco-friendly farming method and in the area where the conventional farming method was applied.

Golden nodeul rice used as a cultivated variety is a mid-late variety, suitable for cultivation in the plains south of Chungbuk, and resistant to leaf blast, white leaf blight, and striped leaf blight.

For rice cultivation, golden Nodeul rice was seeded for 20 days and then machine transplanted. Tilapia and crab spinnerets were used as experimental groups, and conventional groups were used as controls. Each of the six experimental groups was spun with an average of 457 g of tilapia at a release density of 0.35 rice/m2 and an average weight of 3.0 g of blue crab with a spinning density of 10 fish/m2, and harvested by hand after harvesting. A total of 158 kg of supplementary feed was given to 6 sections of tilapia and blue crab spinnerets for about 100 days after release. The tilapia and crab spinnerets did not use any chemical agents such as chemical fertilizers, herbicides and pesticides during the entire period of the experiment.

Experiment result

(1) - the number of rice ^{bags per m 2;} In order to compare the number of rice abandonment in tilapia and crab sanding zone and conventional zone, 12 points were randomly selected and the number of rice abandonment was investigated.

As a result of examining the number of rice abandonment in the experimental group and the control group as shown in Table 2 below, in the experimental group, tilapia-Crabbang, there were 24, 24, 20, 20, 20, 24, 22, 24, 23, 24, 28, 24, and the control group. In the customary population, there were 22, 23, 21, 24, 26, 22, 25, 29, 24, 26, 18, 24. The average number was 23.1 and 23.5 in the experimental group and the control group, respectively, and there was no significant difference. (Table 2)

Comparison of the number of rice dumplings in 1m ^{2 square} division Tilapia-Crab spinneret (experimental zone) Conventional district (control district) Rice Abandoned Water
(dog) 12 random spots
1m ² square sphere 24, 24, 20, 20, 20, 24,
22, 24, 23, 24, 28, 24 22, 23, 21, 24, 26, 22,
25, 29, 24, 26, 18, 24 Average (pcs) 23.1 23.5

(2) Number of ears per plant

In order to compare the number of ears per plant in the tilapia and blue crab spinnerets and the conventional zone, the tilapia-black crab spinneret is 1 m ^{2 at each point in 12 points of 6 areas of the inland ecological complex where the number of rice abandonment is investigated.} Dogs were selected and the number of ears per sack was investigated, and in the conventional district, the number of ears per sack was investigated by ^{randomly selecting 3 of the rice stalks in a 1 m 2} square area at 12 points where the number of rice stalks was investigated (Table 3). )

- As a result of examining the number of ears per rice plant in the experimental and control groups, the number was 15 to 24 in the tilapia and crab spinning zone, which is the experimental group, and 14 to 25, in the conventional group, which is the control. The average number of ears per rice plant was 19 and 18 in the experimental group and the control group, respectively, and one more in the experimental group.

Comparison of the number of ears per vine Tilapia-Crab spinneret (experimental zone) Conventional district (control district) give up Isaac Soo give up Isaac Soo 24 22 28 18 21 17 19 17 24 17 23 16 22 21 24 20 20 19 21 17 21 20 20 19 20 19 24 14 16 21 20 20 20 22 26 16 15 21 21 21 24 23 22 16 21 20 19 21 22 19 25 17 17 21 17 16 24 17 29 20 18 17 16 25 23 20 24 21 20 17 21 18 24 21 26 17 20 17 15 20 28 17 18 17 17 15 19 17 24 16 24 17 18 18 19 18 MIN 15 MIN 14 MAX 24 MAX 25 AVR 19 AVR 18

(3) Number of grains per ear

In order to compare the number of grains per ear in the tilapia-snow crab spinneret and the conventional plot, the number of grains per ear was investigated in the tilapia-blue crab spinneret, one each for each type of waterway system, and three grains per ear in the conventional district. The number of grains per ear was investigated by randomly selecting three of the rice pods. (Table 4)

Comparison of the number of grains per ear division Tilapia-Crab spinneret (experimental zone) division Conventional district (control district) Weight (g) number of grains (dogs) Weight (g) number of grains (dogs) experiment One 890 40,344 control One 870 39,438 2 670 30,371 2 690 31,278 3 840 34,598 3 730 33,091 average 800 35,104 average 763 34,602

(4) Rice yield according to tilapia and aquaculture in paddy fields

① Feed reduction effect of tilapia and snow crabs in paddy fields

When tilapia is released into paddy fields, it improves feed efficiency by changing the physiology and growth environment of rice by contacting the soil with the rice paddy with the trunk and fins by swimming and the effect of making tilapia feces into feed.

And, the excrement of tilapia is decomposed, and these become an energy source for phytoplankton. In addition, the excrement of tilapia becomes an organic substance, and this organic substance becomes food for zooplankton and phytoplankton, and tilapia grows by ingesting this organic substance, zooplankton and phytoplankton. It is possible to reduce the feed supply because food such as organic matter, phytoplankton and zooplankton generated in the non-solar tilapia and snow crab complex culture conditions are always abundant due to the excreta of cultured animals.

In other words, it is an agricultural method that produces pollution-free rice by stocking crabs in paddy fields. The crabs are omnivorous and eat pests and weeds to control diseases and pests, and by vigorous nighttime activities, the soil is turned over and the water is turbid, thereby promoting the growth of rice roots. The excrement was used as an effective manure for rice, and this effective manure produced more than ordinary rice, and there was no disease due to the weeding work and pests and pest work of blue crabs, so the production was high.

In other words, the ingredients of crab rice were of better quality than regular rice, and in particular, in the ingredient analysis of complete grains, which indicates the grade of rice, an average of 95% was evaluated, which was very excellent. As the crab scrapes the bottom to facilitate the supply of oxygen, aquatic organisms actively and reproduce to stabilize the water quality. Also, the excrement of the blue crab is organically converted to provide beneficial nutrients to the rice, resulting in excellent rice. .

② Effect of tilapia and crab on rice growth and yield

In harvesting rice using fish in paddy fields, feed, fertilizer input, stocking density, water depth, soil nutrition, and rice variety are important management variables that determine the rice yield.

In general, when a physical contact stimulus is given to rice, the elongation of the plant is inhibited because the production of ethylene, one of the plant growth hormones, is increased according to the physical stimulus, which makes the plant's longitudinal elongation dull while lateral elongation is promoted.

③ Comparison of rice yields in the Tilapia-Crab sanitary and conventional groves

- As a result of comparing the yields of rice in the tilapia-black crab spinning zone and the conventional zone, 3,270 kg was harvested in one paddy field in the experimental zone where tilapia and blue crab were grown using an eco-friendly farming method, and chemical fertilizers and herbicides were used. In the cultivated conventional district, 3,120 kg was harvested from one paddy field. It was found that the rice yield increased by 5% in the experimental group compared to the conventional group. (Table 5)

Rice Yield Comparison division Tilapia-Crab spinneret (experimental zone) Conventional district (control district) increase(%) rice yield 3,270kg/lot 3,120kg/lot 5

(Practice; use of chemical agents such as herbicides, pesticides, and chemical fertilizers from cultivation to production)

As mentioned above, in the conventional plot, chemical agents are used, which incurs costs, whereas in the tilapia and crab spinnerets, no chemical agents such as herbicides, pesticides, and chemical fertilizers are used throughout the experiment. It works.

In addition, since tilapia and snow crab can be harvested and sold in a complex culture, the tilapia and blue crab spinnerets applied with the inland water eco-culture technology were more economically efficient than the conventional ones.

In addition, as it is reported that it has several advantages such as being able to protect the ecosystem from pesticides and controlling green algae and red algae by reducing nitrogen and phosphorus loads, the eco-friendly paddy ecology conducted in this study also provides safe aquatic products to the public. It is expected to have a significant impact on ecosystem protection and water quality improvement.

Although the present invention has been described above with reference to the above embodiments, it goes without saying that various modifications are possible within the scope of the technical spirit of the present invention.

10: cultivated land 20: waterway
22: inclined wall surface 24: waterway floor surface
30: boundary line 32: landmark planting part
40: injection water supply part 50: overflow type outlet
60: first escape barrier 70: second escape barrier
80: capture container A: paddy field

Claims (5)

A water channel (20) constructed in the paddy field (10) to facilitate feed supply and capture of tilapia;
an injection water supply unit 40 for supplying water to the cultivated land 10;
An overflow type outlet 50 for preventing the water of the cultivated land 10 from rising above a certain water level;
A first anti-escape film 60 buried so as to cover the inside of the paddy field A on the upper surface of the edge of the paddy field A of the cultivated land 10;
A second anti-escape film 70 installed upright from the edge of the paddy field (A) to the top;
A combined paddy field ecological culture system of tilapia and snow crab, characterized in that it includes a catch container (80) installed on the paddy bank (A) to allow the crab to fall.
The method of claim 1,
The rice paddy ecology system of tilapia and crab, characterized in that it is provided with a landmark planting part (32) protruding above the water surface at the boundary line (30) part of the cultivated land (10) and the waterway (20).
The method of claim 1,
At the boundary line (30) of the waterway (20) and the cultivated land (10), a waterway bottom surface (24) having a gradually inclined wall surface (22) is formed.
The method of claim 1,
The injection water supply unit 40 is installed on the side where the water channel is, and the overflow type outlet 50 is installed on the side with the opposite discharge channel.
The method of claim 1,
The first escape barrier 60 is provided with a synthetic resin mesh, and the second escape barrier 70 is a synthetic resin film with a smooth surface.

Images