CN115443866B - Symbiotic planting and breeding method for one-ditch two-station three-planting circulating clean water crabs and rice - Google Patents
Symbiotic planting and breeding method for one-ditch two-station three-planting circulating clean water crabs and rice Download PDFInfo
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- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 110
- 235000009566 rice Nutrition 0.000 title claims abstract description 110
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000009395 breeding Methods 0.000 title claims abstract description 37
- 241000238557 Decapoda Species 0.000 title claims abstract description 15
- 240000007594 Oryza sativa Species 0.000 title 1
- 241000209094 Oryza Species 0.000 claims abstract description 109
- 241000733943 Hapalogaster mertensii Species 0.000 claims abstract description 25
- 230000001488 breeding effect Effects 0.000 claims abstract description 22
- 230000000903 blocking effect Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 17
- 241000196324 Embryophyta Species 0.000 claims description 14
- 239000002028 Biomass Substances 0.000 claims description 3
- 239000003895 organic fertilizer Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000004720 fertilization Effects 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 1
- 239000003205 fragrance Substances 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 239000003337 fertilizer Substances 0.000 abstract description 11
- 239000000575 pesticide Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 4
- 235000013305 food Nutrition 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000003283 Pachira macrocarpa Nutrition 0.000 description 2
- 240000001085 Trapa natans Species 0.000 description 2
- 235000014364 Trapa natans Nutrition 0.000 description 2
- 238000009360 aquaculture Methods 0.000 description 2
- 244000144974 aquaculture Species 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 235000009165 saligot Nutrition 0.000 description 2
- 238000003971 tillage Methods 0.000 description 2
- 241001113556 Elodea Species 0.000 description 1
- 241000270322 Lepidosauria Species 0.000 description 1
- 208000028804 PERCHING syndrome Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
- A01G22/22—Rice
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Botany (AREA)
- Zoology (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention discloses a symbiotic planting and breeding method of a one-ditch two-station three-planting circulating clean water crab rice, which comprises the following steps: firstly, a rice and crab planting area is planned and built into three step areas of a cultivation ditch, a gentle slope low-lying platform and a paddy field planting platform, and then the crab is planted according to the following steps. Step 1: firstly transplanting rice adapting to a deeper water layer after seedling raising on a gentle slope low-lying platform, and arranging a blocking net to be isolated from a culture ditch; step 2: transplanting the rice after seedling raising on a rice field planting platform; step 3: removing the barrier net of the gentle slope low-lying platform to enable the crabs to move in the whole field. By the arrangement of the double platforms, the movable space of the hairy crabs can be increased, the rice planting area can be ensured, the requirements of the two platforms on water depths can be met by two kinds of high-low rice, the rice-crab symbiotic ecological planting and breeding method with uniform field water quality and standard tail water can be realized by a breeding water circulation system, the high-yield, high-quality and high-efficiency rice-crab planting and breeding can be realized, and meanwhile, no tail water emission and no chemical fertilizer and pesticide double reduction can be realized in the rice-crab production.
Description
Technical Field
The invention relates to the technical field of ecological aquaculture and the technical field of ecological rice planting, in particular to a one-ditch two-station three-planting cycle clean water crab rice symbiotic planting and breeding method.
Background
With the continuous innovation of modern agricultural technology, agricultural planting and aquaculture are combined with each other, and are reasonably assembled, and the paddy rice is planted and the aquatic products are cultivated at the same time by utilizing the shallow water environment of the paddy field. The aquatic products can eat pests and weeds in the rice field, and the excrement can also provide nutrients for rice, so that a green cultivation and planting mode is formed.
Crab is a reptile of the class A, also called hairy crab, which is a food of the long-term popular name in China. The crab feet are used for feeding and resisting enemy, and the inner and outer edges of the palm parts are densely populated with villus, so that the crab with villus is named. The hairy crabs are favorite delicious foods for people, and not only have delicious taste, but also have very high nutritive value.
As a typical example in aquatic products, crabs have stronger vitality, delicious taste and rich nutrition and have higher economic value, so that an ecological breeding mode of rice-crab symbiosis is formed, sustainable development of breeding is facilitated, high-quality and safe grains and aquatic products are produced, and meanwhile income of farmers can be increased. The invention patent application CN104145759A discloses a rice-crab symbiotic cultivation method, and CN112219660A discloses a rice-crab ecological planting and breeding method, wherein rice is utilized to provide foods such as perching activities, sunshade cooling places, aquatic organisms and the like for river crabs, manure and sinking feed discharged by the river crabs provide high-quality fertilizers for the rice, the using amount of fertilizers is reduced, partial weeds eaten by the river crabs reduce the application of herbicides, soil structure is improved by movement and activation of the river crabs, and the fertilizers are easy to absorb and promote the growth of the rice; the invention patent 201710127156.X discloses a method for preventing and controlling farmland non-point source pollution by utilizing rice and crab co-cropping, which integrates the respective characteristics of the planting industry and the breeding industry, has a certain control effect on the nitrogen content of water, but has limited purifying effect of single plant, and does not realize the recycling of water.
But all the published related patents or prior art have the following problems:
(1) In the hairy crab cultivation process, a deeper water layer which is not lower than 50cm is required to be maintained in the whole process, rice and crab symbiosis is required to be dug in a rice field, but the water body for dug the rice is not too large, so that the rice planting area is prevented from being reduced, the rice yield is reduced, the grain safety is affected, and the rice planting area is required to be ensured to be more than 90%; however, the limited area of the crab culture water area makes the yield of hairy crabs difficult to improve and affects the planting and breeding benefits. Therefore, how to coordinate the rice planting area and the hairy crab culture water area ensures the rice yield and the culture benefit, and is one of the difficulties existing in rice-crab symbiosis.
(2) The south hairy crabs are usually bred in june, mature and fished before and after october, and the middle of the south hairy crabs cannot be dried to the field. The rice variety must be matched with the growing period of the crabs, and can not fall down after flooding in water and stopping flooding before harvesting for a long time, and the determination of the rice variety is one of the difficulties to be solved by the symbiosis of the rice and the crabs.
(3) In the hairy crab cultivation process, the cultivation water body needs to be exchanged regularly to ensure that the water quality and the oxygen content in the water body in the cultivation process are kept in the optimal state, and a large amount of water bodies are required in the cultivation process. Meanwhile, due to global climate change, extreme climate is frequent, so that the rainfall season and the annual change are large, and popularization of water surface cultivation or paddy field cultivation is not facilitated. On the other hand, the crab culture tail water is not matched with the rice demand. Therefore, how to realize the efficient reuse and zero pollution of tail water in the hairy crab cultivation process is a technical problem which must be solved in the development of green ecological paddy field cultivation.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to solve the problems of ensuring the rice yield and the cultivation benefit, and the high-efficiency reuse and zero pollution of tail water in the hairy crab cultivation process in the prior art, and provides a one-ditch two-station three-planting cycle clean-water crab-rice symbiotic planting method.
2. Technical proposal
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a system is supported to intergrowth planting of two three clean water crabs of circulation rice that plant, includes breed ditch, gentle slope low-lying platform, paddy field planting platform and pipe network, a serial communication port, the gentle slope low-lying platform is located between breed ditch and the paddy field planting platform, it has the pipe network to cultivate the intercommunication between ditch, gentle slope low-lying platform, the paddy field planting platform.
Preferably, the cultivation ditch is L-shaped and occupies no more than 10% of the total area of the cultivation system.
Preferably, the gentle slope low-lying platform is 20-40cm lower than the paddy field planting platform, and the land occupation is about 10% of the total area of the planting system.
Preferably, the network consists of open channels, or blind pipes.
The invention also provides a one-ditch two-station three-planting circulating clean water crab rice symbiotic planting and breeding method, which comprises the following steps:
step 1: firstly transplanting rice after seedling raising on a gentle slope low-lying platform, and arranging a blocking net to be isolated from a culture ditch;
Step 2: after the paddy rice on the low-lying platform on the gentle slope is turned green and water is added, transplanting the paddy rice after seedling raising on the paddy field planting platform;
Step 3: firstly, temporarily raising hairy crabs in a culture ditch (before rice planting), and after the paddy rice of a paddy field planting platform turns green, growing for one week, removing a blocking net of a gentle slope low-lying platform, so that the crabs can move across the field.
Preferably, the transplanting of the rice in the step 1 and the step 2 is performed by adopting methods of mechanical transplanting, manual transplanting, ordered mechanical polishing and the like to perform ordered planting of wide and narrow lines or wide and narrow plants.
Preferably, in the step 2, the rice field planting platform is used for rotary tillage and raking after the rice is fertilized (organic fertilizer or organic-inorganic fertilizer) before being transplanted, and no fertilization is needed in the follow-up process.
Preferably, the feeding of the hairy crabs in the step 3 is performed in a cultivation ditch.
Preferably, waterweeds are planted on the slope sides of the cultivation ditches.
Preferably, different types of rice varieties are adopted for planting in the gentle slope low-lying platform and the paddy field planting platform, the rice varieties with high plant height and waterlogging resistance or the high biomass emergent aquatic plants are selected for planting on the gentle slope low-lying platform, the types of the rice varieties comprise pond rice, deep rice, giant rice and the like, and the emergent aquatic plants comprise lotus roots, cane shoots, water chestnuts and the like; selecting rice varieties with good rice quality, such as Jingshuangyou 1468, jingshou No. 9, lvyingzhuan 1212, jingshou 1540, and the like, which are flooding-resistant, anti-fall, long in growth period, and the like, from a rice field planting platform.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) According to the invention, through the arrangement of the double platforms, the movable space of the hairy crabs can be increased, the rice planting area is ensured, the two kinds of rice with high and low heights are used for adapting to the water depth requirements of the two platforms, the rice-crab symbiotic ecological planting and breeding method with uniform field water quality and up-to-standard tail water is realized by a breeding water circulation system, the high-yield, high-quality and high-efficiency rice-crab planting and breeding can be realized, and meanwhile, no tail water emission and no chemical fertilizer and pesticide double reduction are realized in the rice-crab production.
(2) In the invention, a low-lying buffer area is arranged, so that the area of the hairy crab cultivation water area is enlarged from within 10% to nearly 20% on the basis of ensuring that the rice planting reaches 90%.
(3) In the invention, different rice variety types are adopted, the requirements of planting in different water areas in the same field are met, and the selected variety is suitable for long-term flooding planting.
(4) According to the invention, the problem that the crab culture tail water is not matched with the rice demand is solved through pipe network circulation, and the full Tian Junyi and tail water reach the standard.
Drawings
FIG. 1 is a schematic cross-sectional view of a system for symbiotic planting of a first-furrow, two-stage and three-plant circulating water-cleaning crab and rice.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1:
Referring to fig. 1, a system is supported to two three symbiotic planting of circulation clean water crab rice of a ditch, low-lying platform, paddy field planting platform and pipe network is including breeding ditch, gentle slope, and wherein paddy field planting platform is water purification district, and the paddy field is transplanted and is returned to green and grow to the movable region of hairy crab after certain altitude, and low-lying platform is located between breed ditch and the paddy field planting platform, breeds ditch, low-lying platform, paddy field planting platform between the water link, breeds ditch, paddy field planting platform between the intercommunication have the pipe network.
In the embodiment, the cultivation ditch is L-shaped, the occupied area is not more than 10% of the total area of the planting system, the slow slope low-lying platform is 20-40cm lower than the paddy field planting platform, and the occupied area is about 10% of the total area of the planting system.
In the embodiment, the water body used for producing the crab rice adopts two kinds of cyclic sealing utilization of the inner part and the outer part through facilities such as a matched ditch pipe network and the like to realize zero emission, and the pipe network can be composed of an open channel or a hidden pipe.
In the embodiment, the internal water circulation means that tail water of the hairy crab culture ditch enters the rice growth area through the low-lying platform and is pumped into the rice growth area by the matched pipe network for rice utilization so as to purify and remove water nutrient substances, and the purified water flows back to the crab culture area; the external circulation of the water body means that the water for crabs and rice enters a hairy crab culture area after being regulated in temperature, oxygenated and purified by a water body buffer area.
Example 2:
a symbiotic planting and breeding method of one-ditch two-station three-planting circulating clean water crab rice comprises the following steps:
step 1: firstly transplanting rice after seedling raising on a gentle slope low-lying platform, and arranging a blocking net to be isolated from a culture ditch;
Step 2: after the paddy rice on the low-lying platform on the gentle slope is turned green and water is added, transplanting the paddy rice after seedling raising on the paddy field planting platform;
Step 3: firstly, temporarily raising hairy crabs in a culture ditch (before rice planting), and after the paddy rice on a paddy field planting platform turns green, growing for one week, removing a blocking net of a gentle slope low-lying platform, so that the crabs can move across the field.
In the example, through the arrangement of the double platforms, the movable space of the hairy crabs can be increased, the rice planting area is ensured, the two kinds of rice with high and low heights are suitable for the requirements of the water depths of the two platforms, the rice-crab symbiotic ecological planting and breeding method with uniform field water quality and up-to-standard tail water is realized by a breeding water circulation system, the high-yield, high-quality and high-efficiency rice-crab planting and breeding can be realized, and meanwhile, no tail water emission and no chemical fertilizer and pesticide double reduction are realized in the rice-crab production.
Example 3:
It has the implementation content of the above embodiments, where reference may be made to the foregoing description for specific implementation of the above embodiments, and the details of the embodiments herein are not repeated; in the embodiment of the present application, however, it is different from the above embodiment in that:
transplanting the rice in the step 1 and the step 2 adopts a method of mechanical transplanting, manual transplanting, ordered mechanical polishing and the like to perform wide-narrow row or wide-row narrow plant ordered planting.
Example 4:
It has the implementation content of the above embodiments, where reference may be made to the foregoing description for specific implementation of the above embodiments, and the details of the embodiments herein are not repeated; in the embodiment of the present application, however, it is different from the above embodiment in that:
In the step 2, the rice field planting platform is subjected to rotary tillage and raking after the rice is transplanted with fertilizer (organic fertilizer or organic-inorganic fertilizer), and the fertilizer is not applied any more in the follow-up process.
Example 5:
It has the implementation content of the above embodiments, where reference may be made to the foregoing description for specific implementation of the above embodiments, and the details of the embodiments herein are not repeated; in the embodiment of the present application, however, it is different from the above embodiment in that:
in the step 3, feeding the hairy crabs is carried out in a culture ditch.
Example 6:
It has the implementation content of the above embodiments, where reference may be made to the foregoing description for specific implementation of the above embodiments, and the details of the embodiments herein are not repeated; in the embodiment of the present application, however, it is different from the above embodiment in that:
Planting aquatic plants on the slope sides of the cultivation ditches.
Example 7:
It has the implementation content of the above embodiments, where reference may be made to the foregoing description for specific implementation of the above embodiments, and the details of the embodiments herein are not repeated; in the embodiment of the present application, however, it is different from the above embodiment in that:
In the example, different types of rice varieties are adopted for planting in the gentle slope low-lying platform and the paddy field planting platform, the rice varieties with high plant height and waterlogging resistance or the high biomass emergent aquatic plants are selected for planting on the gentle slope low-lying platform, the types of the rice varieties comprise pond rice, deep rice, giant rice and the like, and the emergent aquatic plants comprise lotus roots, cane shoots, water chestnuts and the like;
In the example, rice varieties with good rice quality, such as Jingyangyou 1468, jingyou No. 9, lvyingzhan 1212, jingyou 1540 and the like, which are flood-resistant, fall-resistant, long in growth period are selected from a rice field planting platform.
Example 8:
It has the implementation content of the above embodiments, where reference may be made to the foregoing description for specific implementation of the above embodiments, and the details of the embodiments herein are not repeated; in the embodiment of the present application, however, it is different from the above embodiment in that:
In the example, 100 mu of biological technology limited company in Datong lake area in Yiyang city of Hunan province is implemented, two types of paddy rice seed are used for 1468, the variety of hairy crab is river and sea 21, the mu yield of high-quality paddy is 510 kg/mu, the fertilizer application is reduced by 80%, the pesticide application is reduced by 90%, and the processed high-quality paddy rice is 300kg, and the yield is 3600 yuan; the yield per mu of the high-quality hairy crabs is 75 kg/mu, the yield value is 11250 yuan, the profit is 7800 yuan, and no tail water is discharged.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The crab-rice symbiotic planting and breeding method based on the one-ditch two-station three-planting circulating water-cleaning crab-rice symbiotic planting and breeding system is characterized in that the planting and breeding system comprises a breeding ditch, a gentle slope low-lying platform, a rice field planting platform and a pipe network, wherein the gentle slope low-lying platform is positioned between the breeding ditch and the rice field planting platform, the breeding ditch, the gentle slope low-lying platform and the water body between the rice field planting platforms are connected, the pipe network is communicated between the breeding ditch and the rice field planting platform, the breeding ditch is L-shaped and occupies no more than 10% of the total area of the planting and breeding system, the gentle slope low-lying platform is 20-40cm lower than the rice field planting platform and occupies 10% of the total area of the planting and the pipe network consists of open channels or hidden pipes;
the crab-rice symbiotic planting and breeding method comprises the following steps:
step 1: firstly transplanting rice after seedling raising on a gentle slope low-lying platform, and arranging a blocking net to be isolated from a culture ditch;
Step 2: after the paddy rice on the gentle slope low-lying platform is turned green and water is added, transplanting the paddy rice after seedling raising on the paddy field planting platform, wherein the gentle slope low-lying platform and the paddy field planting platform adopt different types of paddy rice varieties for planting, waterlogged-tolerant high-biomass paddy rice varieties are selected for planting on the gentle slope low-lying platform, and the types of the paddy rice varieties on the gentle slope low-lying platform are pond paddy rice or deep water paddy rice or giant paddy rice; selecting rice varieties with good rice quality and long growth period, which are flood-resistant, fall-resistant and are planted in a paddy field planting platform, wherein the rice varieties in the paddy field planting platform are Jingyangyou 1468 or Jingyou No. 9 or green silver accounting for Jingyangyou 1212 or Jingyou 1540 or agricultural fragrance 42;
step 3: firstly, temporarily raising hairy crabs in a culture ditch, and after the paddy rice of a paddy field planting platform turns green, growing for one week, removing a blocking net of a gentle slope low-lying platform, so that the crabs can move in the whole field.
2. The symbiotic planting and breeding method of crab and rice according to claim 1, wherein the transplanting of the rice in the step 1 and the step2 is performed by adopting a mechanical transplanting method, a manual transplanting method or an ordered mechanical throwing method.
3. The symbiotic planting and breeding method of crab and rice according to claim 1, wherein the rice field planting platform in step 2 applies organic fertilizer before transplanting rice, and then rotates and rakes the rice, and no fertilization is performed later.
4. The symbiotic breeding method of crab and rice as claimed in claim 1 wherein the feeding of hairy crabs in step 3 is performed in a breeding trench.
5. The method of symbiotic planting and breeding of crab and rice as recited in claim 1 wherein aquatic weeds are planted on the slope of the breeding trench.
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