CN109081448B - Method for planting organic nymphaea hybrid in stepped mode - Google Patents
Method for planting organic nymphaea hybrid in stepped mode Download PDFInfo
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- CN109081448B CN109081448B CN201811002290.8A CN201811002290A CN109081448B CN 109081448 B CN109081448 B CN 109081448B CN 201811002290 A CN201811002290 A CN 201811002290A CN 109081448 B CN109081448 B CN 109081448B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- 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
- A01G22/60—Flowers; Ornamental plants
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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
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
- A01G24/12—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material containing soil minerals
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- 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
- A01K61/10—Culture of aquatic animals of fish
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
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- 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
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Abstract
The invention discloses a method for planting organic nymphaea hybrid in a stepped mode, and belongs to the technical field of plant planting. A method for planting organic nymphaea hybrid in a stepped mode comprises the following steps: arranging a planting area, wherein the planting area comprises a purifying pool, a filtering pool and a nymphaea hybrid planting pool; the purification pool is used for ecologically culturing fish and shrimps in the pool, the fish and the shrimps eat algae in the water to reduce harmful substances in the water, and the purified water source flows into the filter pool; the water source filtration is realized by planting one or a plurality of combinations of lotus, water caltrop and pistia stratiotes in the filter tank in spring and planting cold-resistant water lily in autumn, and the filtered water source enters the nymphaea hybrid planting tank; the nymphaea hybrid planting pool is used for planting nymphaea hybrid with different colors and varieties, and fresh flowers or dry flowers of the nymphaea hybrid can be directly eaten. The method can improve the water quality in the nymphaea hybrid planting pool, is ecological and environment-friendly, has high benefit and simple and effective technology, and the planted organic nymphaea hybrid can be directly used for making tea or used as food for eating.
Description
Technical Field
The invention relates to the technical field of plant planting, in particular to a method for planting organic nymphaea hybrid in a stepped mode.
Background
Globeflower (A. potamogetes)Nymphaea hybrid) The nymphaea tetragona is a tropical large nymphaea tetragona of Nymphaeaceae, has various colors, nine major color systems of gold, yellow, purple, blue, red, tea, green, red, white and the like, and has different fragrance of nymphaea tetragona with different colors, so people are also called as 'nine-grade nymphaea tetragona'. Under proper temperature, the nymphaea hybrid can continuously bloom all the year round, and the flowers are large and can be viewed all the year round. In recent years, nymphaea hybrid is popular and concerned by more people, the nymphaea hybrid is not only a new and excellent precious ornamental aquatic flower and is used for fresh cut flowers or landscaping, but also can be used as a food raw material for making scented tea or catering food due to the fact that the nymphaea hybrid contains abundant placentin, flavone and polyphenol substances, and has whitening and antioxidant effects.
At present, the main breeding mode of the nymphaea hybrid is tuber breeding or seed breeding, the seedling raising cost is high, more manpower and material resources are needed in the growth process of the nymphaea hybrid, and the planted nymphaea hybrid is generally used for landscaping but cannot be directly eaten. The organic nymphaea hybrid which can be directly eaten has high requirements on soil and water quality, so that the water quality is difficult to control in the actual planting process, and in order to ensure that the nymphaea hybrid grows well, pesticides are often sprayed, so that the difficulty of no pollution and no pesticide residue in the whole process is great. Therefore, the exploration of the ecological, environment-friendly, economic and effective planting mode of the organic nymphaea hybrid is of great significance.
Disclosure of Invention
The invention aims to provide a planting method of organic nymphaea hybrid, which is ecological, environment-friendly, good in benefit and capable of being directly eaten.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for planting organic nymphaea hybrid in a stepped mode comprises the following steps:
arranging a planting area, wherein the planting area comprises a purifying pool, a filtering pool and a nymphaea hybrid planting pool;
the purification pool is used for ecologically culturing fish and shrimps in the pool, the fish and the shrimps eat algae in the water to reduce harmful substances in the water, and the purified water source flows into the filter pool;
the water source filtration is realized by planting one or a plurality of combinations of lotus, water caltrop, pistia stratiotes and cold-resistant water lily in the filter tank, and the filtered water source enters the nymphaea hybrid planting tank;
the nymphaea hybrid planting pool is used for planting nymphaea hybrid with different colors and varieties, and fresh flowers or dry flowers of the nymphaea hybrid can be directly eaten.
According to the further technical scheme, the depth of the purification tank is 1.5-2 m, the depth of the filtering tank is 1.5-2 m, and the depth of the nymphaea hybrid planting tank is 1-1.5 m.
According to a further technical scheme, a water source of the purification pond is river water or lake water, fish and shrimps in the pond comprise crucian, carp, black fish and shrimp, and black soil or clay is paved at the bottom of the purification pond.
According to a further technical scheme, one or more plant combinations of lotus, water caltrop and pistia stratiotes are planted in the filter tank in spring, and cold-resistant water lily is planted in the tank in autumn. The plants not only have strong ornamental value, but also have developed roots and stems, directly absorb harmful substances and surplus nutrient substances in water, purify water, and are economical and beautiful.
In a further technical scheme, the nymphaea hybrid planting pond drains water in the pond completely in 12 months, dry pond treatment is carried out, and meanwhile, nymphaea hybrid seedlings are moved into a greenhouse for cultivation; completing dikes at the beginning of 1 month, making ridges on the soil, planting vegetables in the nymphaea hybrid planting pond, harvesting the mature vegetables after one month, and burying roots and leaves in the soil as green manure; in the last ten days of the month, turning soil, introducing a water source filtered by a filtering tank, in the month of 3, planting seedlings of the nymphaea hybrid into the tank, and picking fresh flowers of the nymphaea hybrid in the month of 5-11.
According to the technical scheme, the upper side of the purification tank is provided with a water inlet, the bottom of the purification tank is provided with a water outlet, the water outlet is connected with the water inlet of the filter tank, the water outlet at the bottom of the filter tank is connected with the water inlet of the nymphaea hybrid planting tank, the bottom of the nymphaea hybrid planting tank is provided with a water outlet, the water inlet, the water outlet and the water outlet are respectively provided with a water control valve, the size of water flow is adjusted through the water control valves, the bottom of the purification tank is higher than the filter tank by 30-50 cm, and the bottom of the filter tank is higher than the. The purification tank has good drainage and irrigation conditions and sufficient water source.
According to the further technical scheme, a planting layer and a filtering layer are sequentially arranged in the filtering tank from top to bottom, the planting layer is sandy or sandy soil, the thickness of a soil layer is 20 cm-30 cm, the filtering layer comprises medium sand, gravel, zeolite and broken stone, and the thickness of the filtering layer is 8-12 cm; the bottom of the filter tank is flat, and longitudinal drainage ditches are arranged at intervals of 2m in width.
According to a further technical scheme, loose and fertile neutral loam is paved inside the nymphaea hybrid planting pool, and the pH value is 6.5-7.5. Before land preparation and bed making, a mixture of tea seed cakes and plant ash is used as a base fertilizer, 50 kg/mu of plant ash is added into 15-20 kg/mu of tea seed cakes, and the mixture is uniformly stirred and used before vegetable planting; preparing soil every 2m in width, and forming longitudinal drainage ditches; during soil turning, green manure generated by planting vegetables can be required by growth of the nymphaea tetragona peanuts, and the tea seed cakes and farmyard manure are mixed to be used as base fertilizers; the planting density of the nymphaea hybrid is 200-250 plants/mu, the plant row spacing is 2m, the water depth is controlled along with the size of the plants, and the leaves are always kept above the water surface;
according to a further technical scheme, a biological control method is adopted for insect pests in the growth process of the nymphaea hybrid seeds, used tea seed cakes are easy to decompose and harmless to human bodies, 4-5 kg of tea seed cakes are mashed, water is added for retting and soaking for 8-12 hours, and then 60-80 kg of water is added into filtrate for mixing and spraying; and trap lamps are arranged around the nymphaea hybrid planting pool to kill pests. The biological control method has good effect, can decompose automatically, and is harmless to human body.
Advantageous effects
Compared with the prior art, the invention has the following remarkable advantages:
1. the three-level planting pond realizes double benefits of aquaculture and aquatic plant planting, and the selected aquatic plants such as lotus and water caltrop have strong ornamental value, can purify water quality and have ecological and economic benefits.
2. The bottom of the stepped planting pool is provided with a water outlet, which is favorable for controlling the water quantity in the pool, facilitates the circulation of water sources and saves labor force.
3. The filtering layer consisting of the medium sand, the gravel, the zeolite and the broken stones is arranged below the planting soil at the bottom of the filtering tank, so that trace elements can be provided for the growth of aquatic plants, pollutants can be adsorbed, and harmful substances in the soil and water are reduced.
4. When the nymphaea hybrid is planted, the land can be fully rested by the dry pond treatment of the planting pond and the way of pre-planting vegetables, so that the plant diseases and insect pests are reduced, the vegetables can be eaten, the green manure generated by the vegetables can be used for growth of the nymphaea hybrid, the economy and the environmental protection are realized, and the effect is obvious.
5. In the growth process of the camellia japonica, the used tea seed cake is residue left after oil extraction of the camellia japonica oil fruits, contains tea saponin, has high protein content, can be used as an organic fertilizer, can prevent and control pests, plays a role in biological control, can be decomposed automatically, has no toxic residue, and is economical and efficient.
6. The method can improve the water quality in the nymphaea hybrid planting pool, reduce the use of pesticides, has high benefit, simple and effective technology, can directly pick the planted organic nymphaea hybrid, can be used for making tea or serving as food for eating, and has the effects of maintaining beauty, keeping young, resisting oxidation and treating diseases.
Drawings
FIG. 1 is a top view of a purification tank, a filtration tank and a nymphaea hybrid planting tank;
FIG. 2 is a side view of the purification tank, the filtration tank and the nymphaea hybrid planting tank;
FIG. 3 is a schematic view of the growth of the nymphaea hybrid peanuts in the nymphaea hybrid planting pool;
FIG. 4 is a schematic diagram I of a nymphaea hybrid;
FIG. 5 is a schematic view of a second nymphaea hybrid;
FIG. 6 is a schematic view of the flower size of a nymphaea hybrid;
FIG. 7 is a schematic view of a nymphaea hybrid tea;
FIG. 8 is a schematic view of a scented tea prepared by drying nymphaea hybrid;
FIG. 9 is a comparison graph of the total flavone content of organic nymphaea hybrid planted in the invention and the common nymphaea hybrid;
FIG. 10 is a graph comparing the total polyphenol content of organic nymphaea hybrid planted in the present invention with that of common nymphaea hybrid;
FIG. 11 is a graph comparing the total flavone content of organic nymphaea hybrid with camellia;
FIG. 12 is a graph comparing the total polyphenol content of organic nymphaea hybrid with camellia.
In the figure: 1, a purifying pool; 1-1 water inlet; 2, a filtering tank; 2-1 planting layer; 2-2 of a filter layer; 2-3 aquatic plants; 3, a nymphaea hybrid planting pond; 3-1, water outlet; 3-2 nymphaea hybrid; 4 a water outlet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
As shown in fig. 1 and 2, a method for planting organic nymphaea hybrid in a stepped manner comprises the following steps:
arranging a planting area, wherein the planting area comprises a purifying tank 1, a filtering tank 2 and a Chinese globeflower planting tank 3;
the purifying tank 1 is used for ecologically culturing fish and shrimps in the tank, the algae in the water are eaten by the fish and the shrimps, so that harmful substances in the water are reduced, and the purified water source flows into the filtering tank 2;
the water source filtration is realized by planting one or a plurality of combinations of lotus, water caltrop, pistia stratiotes and cold-resistant water lily in the filtering tank 2, and the filtered water source enters the nymphaea hybrid planting tank 3;
3, planting 3-2 nymphaea hybrid with different colors and varieties, wherein fresh flowers or dried flowers can be directly eaten.
The depth of the purification tank is 1.5-2 m, the depth of the filtering tank is 1.5-2 m, and the depth of the nymphaea hybrid planting tank is 1-1.5 m.
The water source of the purification pond is river water or lake water, the fish and shrimp in the pond comprise crucian, carp, black fish and shrimp, and black soil or clay is paved at the bottom of the purification pond.
The filter tank is planted with one or more plant combinations of lotus, water caltrop and pistia stratiotes in spring, and is planted with cold-resistant water lily in autumn. The plants not only have strong ornamental value, but also have developed roots and stems, directly absorb harmful substances and surplus nutrient substances in water, purify water, and are economical and beautiful.
The nymphaea hybrid planting pond drains water in the pond completely in 12 months, pond drying treatment is carried out, and meanwhile, nymphaea hybrid seedlings are moved into a greenhouse for cultivation; completing dikes at the beginning of 1 month, making ridges on the soil, planting vegetables in the nymphaea hybrid planting pond, harvesting the mature vegetables after one month, and burying roots and leaves in the soil as green manure; in the last ten days of the month, turning soil, introducing a water source filtered by a filtering tank, in the month of 3, planting seedlings of the nymphaea hybrid into the tank, and picking fresh flowers of the nymphaea hybrid in the month of 5-11.
The water inlet 1-1 is arranged on the upper side of the purification tank 1, the water outlet 4 is arranged at the bottom of the purification tank 1, the water outlet 4 is connected with the water inlet of the filter tank, the water outlet at the bottom of the filter tank 2 is connected with the water inlet of the nymphaea hybrid planting tank 3, the water outlet 3-1 is arranged at the bottom of the nymphaea hybrid planting tank 3, the water inlet 1-1, the water outlet 4 and the water outlet 3-1 are respectively provided with a water control valve, the size of water flow is adjusted through the water control valves, the bottom of the purification tank 1 is 230-50 cm higher than the filter tank, and the bottom of the filter tank 2 is 330-50 cm higher than. The purification tank has good drainage and irrigation conditions and sufficient water source.
Black soil or clay is paved at the bottom of the purification tank. The filter tank is internally provided with a planting layer and a filtering layer in sequence from top to bottom, the planting layer is sandy or sandy soil, the thickness of the soil layer is 20 cm-30 cm, the filtering layer comprises medium sand, gravel, zeolite and broken stone, and the thickness of the filtering layer is 8-12 cm; the bottom of the filter tank is flat, and longitudinal drainage ditches are arranged at intervals of 2m in width.
Loose and fertile neutral loam is paved inside the nymphaea hybrid planting pool, and the pH value is 6.5-7.5.
Before land preparation and bed making, a mixture of tea seed cakes and plant ash is used as a base fertilizer, 50 kg/mu of plant ash is added into 15-20 kg/mu of tea seed cakes, and the mixture is uniformly stirred and used before vegetable planting; preparing soil every 2m in width, and forming longitudinal drainage ditches; during soil turning, green manure generated by planting vegetables can be required by growth of the nymphaea tetragona peanuts, and the tea seed cakes and farmyard manure are mixed to be used as base fertilizers; the planting density of the nymphaea hybrid is 200-250 plants/mu, the plant row spacing is 2m, the water depth is controlled along with the size of the plants, and the leaves are always kept above the water surface. The insect pest in the growth process of the nymphaea hybrid seeds adopts a biological control method, the used tea seed cakes are easy to decompose and harmless to human bodies, 4-5 kg of tea seed cakes are mashed, water is added for retting and soaking for 8-12 hours, and then 60-80 kg of water is added into filtrate for mixing and spraying; and trap lamps are arranged around the nymphaea hybrid planting pool to kill pests. The biological control method has good effect, can decompose automatically, and is harmless to human body.
When 3 months are spent on planting the nymphaea hybrid, the drainage port of the filtering tank is opened, and water demand is supplemented according to the height of the plant; after the completion of the replenishment, closing the drainage port of the filtering tank, opening the drainage port of the purifying tank, and replenishing the water quantity with the same water level as that before; then the water outlet of the purification tank is closed, and the water inlet of the purification tank is opened to supplement water source, so as to meet the growth requirement.
The detection result of the water quality in the planting process of the nymphaea hybrid is as follows:
water quality indexes of water source flowing into purifying poolThe values are respectively: the pH value is 7.1; total Nitrogen (TN) 15.25 mg/L; ammoniacal Nitrogen (NH)3-N) 2.21 mg/L; nitrate Nitrogen (NH)3 --N) 0.58 mg/L; total Phosphorus (TP) 1.26 mg/L; dissolved Oxygen (DO) in water 7.08 mg/L; chemical Oxygen Demand (COD) 98.58 mg/L; biochemical Oxygen Demand (BOD)5）15.84 mg/L。
The water flowing into the nymphaea hybrid planting pond through the purification pond and the filter pond: the pH value is 7.2; TN 2.38 mg/L, removal rate 84.4%; NH (NH)3-N0.53 mg/L, removal rate 76.02%; NH (NH)3 --N0.14 mg/L, removal rate 75.86%; TP is 0.36 mg/L, and the removal rate is 71.43 percent; DO 12.24 mg/L; COD is 18.04 mg/L, and the removal rate is 81.7 percent; BOD53.88 mg/L, and the removal rate is 75.51 percent. From the detection result, the processing effect is better.
In the actual culture process, the nymphaea hybrid peanuts are strong and strong, as shown in fig. 3, the flowers are large, and the average diameter of the flowers reaches 20-25 cm, as shown in fig. 4-6; the fresh flowers can be directly brewed after being picked and cleaned, the color is clear, and the taste is mellow, as shown in figure 7; the dried fresh flower can also be made into scented tea, as shown in FIG. 8, which can be preserved for a long time.
The content detection of total flavone and total polyphenol is carried out on the planted nymphaea hybrid, and compared with the ordinary planted nymphaea hybrid, as shown in figure 9, the flavone and the total polyphenol of the organic nymphaea hybrid planted by the method are found to be obviously higher than those of the ordinary planted nymphaea hybrid; meanwhile, the planted organic nymphaea hybrid is compared with common tea (white tea, green tea and black tea), and the content of the total flavonoids in the nymphaea hybrid in different colors is found to be 18.29-26.68 mg/g, as shown in figure 10, which is higher than that of the white tea, the green tea and the black tea; the total polyphenol content is 31.64-36.51 mg/g, as shown in figure 11, which is higher than that of black tea, and slightly lower than that of white tea and green tea. The organic nymphaea hybrid planted by the planting method is higher in bioactive substance and better in quality, and can be used as a novel functional tea drink.
The above-mentioned embodiments and drawings are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all suitable changes and modifications made according to the content of the claims should be considered as the technical scope of the present invention.
Claims (8)
1. A method for planting organic nymphaea hybrid in a stepped mode is characterized by comprising the following steps:
arranging a planting area, wherein the planting area comprises a purifying pool, a filtering pool and a nymphaea hybrid planting pool;
the purification pool is used for ecologically culturing fish and shrimps in the pool, the fish and the shrimps eat algae in the water to reduce harmful substances in the water, and the purified water source flows into the filter pool;
the water source filtration is realized by planting one or a plurality of combinations of lotus, water caltrop, pistia stratiotes and cold-resistant water lily in the filter tank, and the filtered water source enters the nymphaea hybrid planting tank;
the nymphaea hybrid planting pool is used for planting nymphaea hybrid with different colors and varieties, and fresh flowers or dry flowers of the nymphaea hybrid can be directly eaten;
the nymphaea hybrid planting pond drains water in the pond completely in 12 months, pond drying treatment is carried out, and meanwhile, nymphaea hybrid seedlings are moved into a greenhouse for cultivation; completing dikes at the beginning of 1 month, making ridges on the soil, planting vegetables in the nymphaea hybrid planting pond, harvesting the mature vegetables after one month, and burying roots and leaves in the soil as green manure; turning soil in late ten days of 2 months, introducing a water source filtered by a filtering tank, planting seedlings of the nymphaea hybrid in the tank in 3 months, and picking fresh flowers of the nymphaea hybrid in 5-11 months;
loose fertile neutral loam is paved inside the nymphaea hybrid planting pool, the pH value is 6.5-7.5, before land preparation and bedding, a mixture of tea seed cakes and plant ash is used as a base fertilizer, 50 kg/mu of plant ash is added into the tea seed cakes with the dosage of 15-20 kg/mu, and the mixture is uniformly mixed and used before vegetable planting.
2. The stepped planting method of organic nymphaea hybrid plants according to claim 1, wherein the depth of the purification tank is 1.5-2 m, the depth of the filtration tank is 1.5-2 m, and the depth of the nymphaea hybrid plant tank is 1-1.5 m.
3. The method for planting organic nymphaea hybrid step by step as claimed in claim 1, wherein the water source of the purification pond is river water or lake water, the fishes and shrimps in the pond include crucian carp, black carp and shrimp, and black soil or clay is laid on the bottom of the purification pond.
4. The stepped planting method of organic nymphaea hybrid according to claim 1, wherein the filtering pond is planted with one or more plant combinations of lotus, water caltrop and pistia stratiotes in spring, and is planted with cold-resistant water lily in autumn.
5. The method for planting organic nymphaea hybrid step by step according to claim 1, wherein a water inlet is formed in the upper side of the purifying tank, a water outlet is formed in the bottom of the purifying tank, the water outlet is connected with the water inlet of the filtering tank, the water outlet in the bottom of the filtering tank is connected with the water inlet of the nymphaea hybrid planting tank, a water outlet is formed in the bottom of the nymphaea hybrid planting tank, water control valves are arranged on the water inlet, the water outlet and the water outlet, the water flow size is adjusted through the water control valves, the bottom of the purifying tank is 30-50 cm higher than that of the filtering tank, and the bottom of the filtering tank is 30-50 cm higher than that.
6. The method for planting organic nymphaea hybrid plants in a stepped mode according to claim 1, wherein a planting layer and a filtering layer are sequentially arranged inside the filtering tank from top to bottom, the planting layer is sandy or sandy soil, the thickness of the soil layer is 20 cm-30 cm, the filtering layer comprises medium sand, gravel, zeolite and broken stone, and the thickness of the filtering layer is 8-12 cm; the bottom of the filter tank is flat, and longitudinal drainage ditches are arranged at intervals of 2m in width.
7. The stepwise planting method of organic nymphaea hybrid according to claim 1, wherein longitudinal gutters are formed in the nymphaea hybrid planting pond every 2m in width; during soil turning, green manure generated by planting vegetables can be required by growth of the nymphaea tetragona peanuts, and the tea seed cakes and farmyard manure are mixed to be used as base fertilizers; the planting density of the nymphaea hybrid is 200-250 plants/mu, the plant row spacing is 2m, the water depth is controlled along with the size of the plants, and the leaves are always kept above the water surface.
8. The method for planting organic nymphaea hybrid plants in a stepped mode according to claim 4, wherein insect pests in the growth process of the nymphaea hybrid plants are biologically prevented and treated, 4-5 kg of tea seed cakes are smashed, water is added for retting and soaking for 8-12 hours, and then 60-80 kg of water is added into filtrate for mixing and spraying; and trap lamps are arranged around the nymphaea hybrid planting pool to kill pests.
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