CN111903454A - Method for planting and maintaining elodea nuttallii in field for crop rotation of rice and shrimps - Google Patents
Method for planting and maintaining elodea nuttallii in field for crop rotation of rice and shrimps Download PDFInfo
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- CN111903454A CN111903454A CN202010681103.4A CN202010681103A CN111903454A CN 111903454 A CN111903454 A CN 111903454A CN 202010681103 A CN202010681103 A CN 202010681103A CN 111903454 A CN111903454 A CN 111903454A
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- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 38
- 235000009566 rice Nutrition 0.000 title claims abstract description 38
- 241000555925 Elodea nuttallii Species 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000003967 crop rotation Methods 0.000 title abstract description 3
- 241000143060 Americamysis bahia Species 0.000 title 1
- 240000007594 Oryza sativa Species 0.000 title 1
- 241001113556 Elodea Species 0.000 claims abstract description 74
- 241000209094 Oryza Species 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 241000238017 Astacoidea Species 0.000 claims abstract description 32
- 239000003337 fertilizer Substances 0.000 claims abstract description 29
- 230000004720 fertilization Effects 0.000 claims abstract description 13
- 241000238557 Decapoda Species 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 230000009466 transformation Effects 0.000 claims abstract description 3
- 238000003971 tillage Methods 0.000 claims description 8
- 230000001954 sterilising effect Effects 0.000 claims description 6
- 238000009395 breeding Methods 0.000 claims description 5
- 230000001488 breeding effect Effects 0.000 claims description 5
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 239000007844 bleaching agent Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 12
- 229910052698 phosphorus Inorganic materials 0.000 description 12
- 239000011574 phosphorus Substances 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000000618 nitrogen fertilizer Substances 0.000 description 6
- PUKLDDOGISCFCP-JSQCKWNTSA-N 21-Deoxycortisone Chemical compound C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)C)(O)[C@@]1(C)CC2=O PUKLDDOGISCFCP-JSQCKWNTSA-N 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- FCYKAQOGGFGCMD-UHFFFAOYSA-N Fulvic acid Natural products O1C2=CC(O)=C(O)C(C(O)=O)=C2C(=O)C2=C1CC(C)(O)OC2 FCYKAQOGGFGCMD-UHFFFAOYSA-N 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000002738 chelating agent Substances 0.000 description 3
- 239000002509 fulvic acid Substances 0.000 description 3
- 229940095100 fulvic acid Drugs 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 235000013619 trace mineral Nutrition 0.000 description 3
- 239000011573 trace mineral Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 241000218523 Adrianichthyidae Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241001646834 Mesona Species 0.000 description 1
- 244000151639 Panicum mucronatum Species 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 235000019629 palatability Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
-
- 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
-
- 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
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/60—Fishing; Aquaculture; Aquafarming
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Botany (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Fertilizers (AREA)
Abstract
The application discloses a method for planting and maintaining elodea nuttallii in fields by crop rotation of rice and shrimps, wherein the field is disinfected after the transformation of the field is completed in 11-12 months in the year, and the elodea nuttallii is planted after the disinfection; after the waterweeds are planted for 2-3 days, performing first fertilization according to 200-300 g rooting agent/mu and 200-300 g compound fertilizer/mu, and regularly applying the same amount of fertilizer every 7 days until the waterweeds are stable in growth; after the elodea nuttallii is planted in the current year, the water depth of a field is controlled to be 15-20 cm, the water depth is gradually increased to 25-30 cm in the next 3 months, and after 4 months, the water depth is increased to 35-40 cm and is increased to 45-50 cm at the utmost; feeding crayfish at the bottom of 2 months in the next year; after the crayfish is cultured, the waterweed is directly returned to the field, so that partial fertilizer is provided for the growth of the succeeding paddy, the fertilizer investment is reduced, and the production cost is reduced. This application adopts rice shrimp rotation mode, and the waterweed planting density is lower than traditional rice shrimp intergrowth mode, and the cost is lower, and the later stage maintenance is more simple and convenient.
Description
Technical Field
The application relates to the technical field of comprehensive planting and breeding of rice and crayfishes, in particular to a method for planting and maintaining waterweed in the field under a rice and crayfish rotation mode.
Background
Elodea alga, school name: elodea nuttallii, english name: waterweed, an annual higher submerged plant, native to America, introduced in China from the lake lute of Japan in the 80 s of the 20 th century. The waterweed has wide adaptability, low temperature resistance and pollution resistance, so the waterweed is more and more concerned in the ecological restoration of the water body. The waterweed has strong fertility, grows quickly in spring, stagnates or partially dies in summer, grows in axillary buds at the end of autumn and in winter, and grows from winter to spring in the early summer. The waterweed has the characteristics of freshness, tenderness and crispness, good palatability and high edibility, and is widely applied to the culture of river crabs, crayfishes and the like in China. The waterweeds are planted in the crab pond and the shrimp pond, so that a good ecological environment can be created for the river crabs and crayfishes to move, hide and exuviate, the river crabs and the crayfishes can grow faster, the morbidity can be reduced, and the survival rate can be improved. In the process of breeding crayfishes in a paddy field, the scale and the growth of the waterweed are one of the keys for determining the breeding success rate of the crayfishes, and meanwhile, the quality of the crayfishes is also obviously influenced.
Disclosure of Invention
The method is easy to implement and simple and convenient to operate, and the waterweeds are directly returned to the field after the crayfishes are bred, so that partial fertilizer is provided for rice planting, and the application amount of the fertilizer is reduced.
A method for planting and maintaining waterweed in fields of rice and shrimp rotation comprises the following steps:
field block reconstruction and planting: sterilizing the field after the field transformation is completed in 11-12 months in the current year, and planting the elodea nutans after the sterilization;
fertilization management: after the waterweeds are planted for 2-3 days, performing first fertilization according to 200-300 g rooting agent/mu and 200-300 g compound fertilizer/mu, and regularly applying the fertilizer with the same dosage as the first fertilization every 7 days until the waterweeds are stable in growth;
controlling the water level: after the elodea nuttallii is planted in the current year, the water depth of a field is controlled to be 15-20 cm, the water depth is gradually increased to 25-30 cm in the next 3 months, and after 4 months, the water depth is increased to 35-40 cm and is increased to 45-50 cm at the utmost;
crayfish breeding: the method comprises the following steps that in the next year, when crayfishes are thrown at the bottom of 2 months, the coverage of the waterweed reaches 20-30%, the coverage of the waterweed reaches 40-50% in 3-4 months, and when the crayfishes are bred at the bottom of 5 months, the coverage of the waterweed reaches 60-70%;
and (3) returning the elodea and planting the rice: after the crayfish is cultured, the waterweed is directly returned to the field, and partial fertilizer is provided for the growth of the rice in the next crop.
Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.
Optionally, the field reconstruction includes: after the late rice is harvested, reinforcing, heightening ridges to 50-60 cm higher than the rice field surface, and then carrying out rotary tillage for 1 time; and (4) sterilizing after rotary tillage, wherein quick lime or bleaching powder is adopted for sterilization.
Optionally, the planting of the elodea nutans is: and (3) adding water to 15cm after 3-5 days of disinfection, and planting the waterweeds at a row spacing of 4-6 m and a cluster spacing of 7-9 m, wherein the using amount (fresh weight) of the waterweeds is 30-40 kg/mu.
Optionally, in the fertilizing management step, fertilizing is always performed according to 200-250 g of rooting agent per mu and 200-250 g of compound fertilizer per mu.
Optionally, the rooting agent is a root-growing grass-strengthening agent.
Optionally, the compound fertilizer is N-P2O5-K2The O proportion is 19-9-19.
The root-growing and grass-strengthening granules are commercially available products, and mainly comprise trace element chelating agents, fulvic acid, phosphorus elements, potassium elements, carbon sources and the like. The compound fertilizer can also be obtained commercially. When in fertilization, the fertilizer is directly and uniformly thrown to the place where the waterweed is planted.
The stable growth refers to that after the waterweed is planted, the root system is normally increased, the root is firmly rooted, the lateral roots are rich, and no floating grass or rotten grass exists.
Optionally, the stable growth of the waterweeds can be realized by co-fertilizing for 2-3 times in the fertilizing management step.
Further optionally, after 5 days of disinfection, adding water to 15cm, planting the waterweeds at a row spacing of 6m and a cluster spacing of 7m, wherein the using amount (fresh weight) of the waterweeds per mu is 40 kg; after 2 days of planting, the Yangtgen Zhuangcao Bao granules and N-P are applied to each mu2O5-K2200g of compound fertilizer with the O proportion of 19-9-19 respectively, and then fertilizing once every 7 days according to the same dosage for three times; the water depth of the field is controlled to be 18cm, the water depth is gradually increased to 25cm when the air temperature begins to be warmed up in the next 3 months, and the water depth is increased to 35cm after 4 months and is increased to 45cm at the utmost.
Under the most preferable curing condition, when the first crayfish fries are thrown at the end of 2 months next year, the coverage of the waterweeds reaches 30 percent; 3-4 months, the coverage reaches 50%; when the crayfish culture is finished at the bottom of 5 months, the coverage of the waterweed reaches 70 percent, and the per mu yield of the crayfish reaches 165 kg. At this time, the average biomass (fresh weight) of the waterweeds was 3.85kg/m2According to the dry matter content of the waterweed of 8.47 percent, the nitrogen content of 2.86 percent and the phosphorus content of 0.91 percent, the waterweed is completely decomposed, and the nitrogen and phosphorus contents of the waterweed per mu can be respectively 6.22kg and 1.98kg for the rice of the succeeding crops. According to the conventional rice nitrogen fertilizer dosage in the northern Zhejiang region, the dosage is generally 20 kg/mu, the nitrogen fertilizer application amount can be reduced by 31 percent, and the phosphorus element content can meet the rice growth requirement.
Compared with the prior art, the application has at least one of the following advantages and effects:
(1) the waterweeds are planted in the slack winter rice field after being slightly modified to breed the crayfishes, so that the wasteland area is reduced, and the rice field output is increased. The waterweed can provide moving, hiding and shelling places for the crayfishes, and can play a role in purifying water quality and improving the quality of the crayfishes.
(2) After the crayfish is bred, the waterweed is directly returned to the field, and partial fertilizer can be provided for the growth of the succeeding paddy rice, so that the fertilizer investment is reduced, the production cost is reduced, and two purposes are achieved at one stroke.
(3) By adopting a rice and shrimp rotation mode, the planting density of the waterweed is lower than that of the traditional rice and shrimp symbiotic mode, the cost is lower, and the later-period maintenance is simpler and more convenient.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Example 1:
(a) field reconstruction
Slightly reforming the rice field after late rice is harvested at the bottom of 11 months in the year, and reinforcing and heightening ridges to 60cm higher than the surface of the rice field. Then carrying out rotary tillage for 1 time, and after the rotary tillage, adopting bleaching powder with 28 percent of available chlorine content to disinfect the field according to the dosage of 5kg per mu.
(b) Elodea planting
After 5 days of disinfection, water is added to the water to reach 15cm, and the waterweeds are planted according to the row spacing of 5m and the plant spacing of 8m, wherein the using amount (fresh weight) of the waterweeds per mu is 35 kg.
(c) Fertilization management
3 days after the waterweed is planted, the Yangtze Zhuangcao Bao granules (the main components of which are trace element chelating agent, fulvic acid, phosphorus element, potassium element, carbon source and the like) and N-P are applied to each mu2O5-K2The O proportion is respectively 250g of compound fertilizer with 19-9-19. When fertilizing, directly and uniformly throwing the fertilizer to the waterweed plantsAt the cluster. After 7 days, the same amount of fertilizer was applied again.
(d) Water level control
After the elodea nuttallii is planted in the same year, the water depth of the field is controlled to be 20 cm. In the next 3 months, when the air temperature begins to warm up, the water depth is gradually increased to 30cm, and after 4 months, the water depth is increased to 40cm, and the water depth is increased to 50 cm.
By adopting the embodiment 1, when the first crayfish fries are thrown at the end of 2 months in the next year, the coverage of the elodea nuttallii reaches 25 percent (the coverage refers to the proportion of the area of an elodea nuttallii growing region to the area of the whole field); 3-4 months, the coverage reaches 45%; when the crayfish culture is finished at the bottom of 5 months, the coverage of the waterweed reaches 65 percent, and the per mu yield of the crayfish reaches 155 kg. At this time, the average biomass (fresh weight) of the waterweeds was 3.25kg/m2According to the dry matter content of the waterweed of 8.47 percent, the nitrogen content of 2.86 percent and the phosphorus content of 0.91 percent, the waterweed is completely decomposed, and the nitrogen and phosphorus contents of the waterweed per mu can be respectively 5.25kg and 1.67kg for the succeeding crops of rice. According to the conventional rice nitrogen fertilizer dosage in the northern Zhejiang region, the dosage is generally 20 kg/mu, the nitrogen fertilizer application dosage can be reduced by 26%, the phosphorus element content basically can meet the rice growth requirement, and the weight-reducing effect is obvious.
Example 2:
(a) field reconstruction
Slightly reforming the rice field after late rice is harvested at the bottom of 11 months in the year, and reinforcing and heightening ridges to 50cm higher than the surface of the rice field. Then carrying out rotary tillage for 1 time, and after the rotary tillage, adopting bleaching powder with 28 percent of available chlorine content to disinfect the field according to the dosage of 5kg per mu.
(b) Elodea planting
After 5 days of disinfection, water is added to the water to reach 15cm, and the waterweeds are planted according to the row spacing of 6m and the cluster spacing of 7m, and the using amount (fresh weight) of the waterweeds per mu is 40 kg.
(c) Fertilization management
After 2 days of planting of the waterweed, the Mesona longituba particles (mainly comprising trace element chelating agent, fulvic acid, phosphorus element, potassium element, carbon source and the like) and N-P are applied to each mu2O5-K2The O proportion is respectively 200g of compound fertilizers with 19-9-19. When in fertilization, the fertilizer is directly and evenly thrown to the place where the waterweed is planted. After 7 days and 14 days, the same amount of fertilizer is applied againAnd then, fertilization was performed 3 times in total.
(d) Water level control
After the elodea nuttallii is planted in the same year, the water depth of the field is controlled to be 18 cm. In 3 months of the next year, when the air temperature begins to warm up, the water depth is gradually increased to 25cm, and after 4 months, the water depth is increased to 35cm, and the water depth is increased to 45cm at most.
By adopting the embodiment 2, when the crayfish fries of the first batch are thrown at the end of 2 months in the next year, the coverage of the waterweed reaches 30 percent; 3-4 months, the coverage reaches 50%; when the crayfish culture is finished at the bottom of 5 months, the coverage of the waterweed reaches 70 percent, and the per mu yield of the crayfish reaches 165 kg. At this time, the average biomass (fresh weight) of the waterweeds was 3.85kg/m2According to the dry matter content of the waterweed of 8.47 percent, the nitrogen content of 2.86 percent and the phosphorus content of 0.91 percent, the waterweed is completely decomposed, and the nitrogen and phosphorus contents of the waterweed per mu can be respectively 6.22kg and 1.98kg for the rice of the succeeding crops. According to the conventional rice nitrogen fertilizer dosage in the northern Zhejiang region, the dosage is generally 20 kg/mu, the nitrogen fertilizer application amount can be reduced by 31 percent, and the phosphorus element content can meet the rice growth requirement.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A method for planting and maintaining waterweed in fields of rice and shrimp rotation is characterized by comprising the following steps:
field block reconstruction and planting: sterilizing the field after the field transformation is completed in 11-12 months in the current year, and planting the elodea nutans after the sterilization;
fertilization management: after the waterweeds are planted for 2-3 days, performing first fertilization according to 200-300 g rooting agent/mu and 200-300 g compound fertilizer/mu, and regularly applying the fertilizer with the same dosage as the first fertilization every 7 days until the waterweeds are stable in growth;
controlling the water level: after the elodea nuttallii is planted in the current year, the water depth of a field is controlled to be 15-20 cm, the water depth is gradually increased to 25-30 cm in 3 months next year, and the water depth is increased to 35-40 cm after 4 months and is increased to 45-50 cm at the deepest;
crayfish breeding: the method comprises the following steps that in the next year, when crayfishes are thrown at the bottom of 2 months, the coverage of the waterweed reaches 20-30%, the coverage of the waterweed reaches 40-50% in 3-4 months, and when the crayfishes are bred at the bottom of 5 months, the coverage of the waterweed reaches 60-70%;
and (3) returning the elodea and planting the rice: after the crayfish is cultured, the waterweed is directly returned to the field, and partial fertilizer is provided for the growth of the rice in the next crop.
2. The method for growing and maintaining elodea nuttallii in a field according to claim 1, wherein said field block modification comprises: after the late rice is harvested, reinforcing, heightening ridges to 50-60 cm higher than the rice field surface, and then carrying out rotary tillage for 1 time; and (5) after rotary tillage, adopting quick lime or bleaching powder for disinfection.
3. The method for growing and maintaining elodea nuttallii in a field according to claim 1, wherein said growing elodea nuttallii in said field modifying and growing step comprises: and (3) feeding water to a water depth of 14-16 cm after 3-5 days of disinfection, and planting the waterweeds at a row spacing of 4-6 m and a cluster spacing of 7-9 m, wherein the using amount (fresh weight) of the waterweeds is 30-40 kg/mu.
4. The method for planting and maintaining elodea nutans in fields according to claim 1, wherein the step of applying fertilizers is performed with 200-250 g rooting agent/mu and 200-250 g compound fertilizer/mu all the time in the step of applying fertilizers and managing.
5. The method for growing and maintaining elodea nuttallii in a field according to claim 1, wherein the rooting agent is a root-growing grass-strengthening agent.
6. The method for growing and maintaining elodea nuttallii in fields according to claim 1, wherein said compound fertilizer is N-P2O5-K2The O proportion is 19-9-19.
7. The method for growing and maintaining elodea nuttallii in fields according to claim 1, wherein the fertilization management step is performed for 2-3 times in total.
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| CN202010681103.4A CN111903454B (en) | 2020-07-15 | 2020-07-15 | Method for planting and maintaining elodea nuttallii in field for crop rotation of rice and shrimps |
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| CN202010681103.4A CN111903454B (en) | 2020-07-15 | 2020-07-15 | Method for planting and maintaining elodea nuttallii in field for crop rotation of rice and shrimps |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112493188A (en) * | 2020-12-09 | 2021-03-16 | 南京军鸣龙虾养殖专业合作社 | Rice and shrimp crop rotation ecological breeding method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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