CN112655497A - Selenium-rich ginseng and cultivation method thereof - Google Patents
Selenium-rich ginseng and cultivation method thereof Download PDFInfo
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Abstract
The invention relates to selenium-rich ginseng and a cultivation method thereof. The cultivation method comprises the following steps: cultivating the land for ploughing, and applying the nano selenium organic fertilizer for cultivating the land after the cultivation is finished; spraying nano-selenium SOD nutrient solution on the leaves in spring of the 1 st year after the ginseng seedlings, and spraying nano-selenium SOD nutrient solution on the leaves in autumn of the 1 st year; spraying the nano-selenium SOD nutrient solution on the leaves in spring of 2 years, and continuously spraying the nano-selenium SOD nutrient solution on the leaves in autumn of 2 years; spraying the nano-selenium SOD nutrient solution on leaves in spring and autumn of 3 rd year, and directly irrigating roots with the nano-selenium SOD nutrient solution during 6-8 months; and (3) spraying the nano-selenium SOD nutrient solution on the leaves in spring and autumn of the 4 th year, and directly irrigating the roots with the nano-selenium SOD nutrient solution in the period of 6-8 months. The cultivation method scientifically applies the nano-selenium SOD nutrient solution to the leaves and the roots, so that the finally obtained ginseng is rich in selenium element.
Description
Technical Field
The invention belongs to the field of planting, and particularly relates to selenium-rich ginseng and a cultivation method thereof.
Background
Ginseng (scientific name: Panaxginseng C.A. Meyer) is a perennial herb of Panax of Araliaceae. Up to 60 cm; the rootstock is short and the main root is spindle-shaped; the palm-shaped compound leaves grow at the top of the stem in 3-6 rounds, the leaf stalks grow by 3-8 cm and have no hair; 3-5 parts of small leaves, membranous, elliptical or oblong elliptical shape of the central small leaf, 8-12 cm long, oval or rhomboid oval shape of the lateral small leaf, 2-4 cm long, tapered tip length, wide wedge shape of the base part, fine saw teeth, sharp teeth, upper part for dispersing stabbed hair, lower part for hairless, 5-6 pairs of lateral veins; the length of the petiole is 0.5-2.5 cm; the cap of the single stem of the umbrella-shaped inflorescence has 30 to 50 flowers, and the inflorescence stem is 15 to 30 centimeters long; the length of the flower stalk is 0.8-1.5 cm; the flower is light yellow and green; the calyx has 5 small teeth and has no hair; petals 5; short filament; ovary 2 room, style 2, abscission; flat spherical fruit, bright red, 6-7 mm in diameter; kidney-shaped seeds and milk white.
The succulent root of Ginseng radix is tonic, and is suitable for regulating blood pressure, recovering heart function, neurasthenia and asthenia, and also has expectorant, stomach invigorating, diuretic and exciting effects. The stems, leaves, flowers, fruits and processing by-products of ginseng are light industrial materials, and can be processed into commercial products such as cigarettes, wines, teas, crystals, pastes, etc., containing ginseng components.
With the specialization of market demands, the existing cultivation technology can not produce the selenium-rich ginseng, so the technical scheme of the invention is provided.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides selenium-enriched ginseng and a cultivation method thereof. The cultivation method scientifically applies the nano-selenium SOD nutrient solution to the leaves and the roots, so that the finally obtained ginseng is rich in selenium element, and the diverse demands of the market are met.
The scheme of the invention is to provide a cultivation method of selenium-rich ginseng, which comprises the following steps:
(1) land preparation and cultivation: ploughing the cultivation land, and applying the nano selenium organic fertilizer to cultivate the land after the cultivation is finished;
(2) and (3) field management in 1-2 years: spraying nano-selenium SOD nutrient solution on the leaves in spring of the 1 st year after the ginseng seedlings, and spraying nano-selenium SOD nutrient solution on the leaves in autumn of the 1 st year; spraying the nano-selenium SOD nutrient solution on the leaves in spring of 2 years, and continuously spraying the nano-selenium SOD nutrient solution on the leaves in autumn of 2 years;
(3) and (3) field management to 4 th year: spraying nano-selenium SOD nutrient solution on the leaves in spring of 3 years, then spraying nano-selenium SOD nutrient solution on the leaves in autumn of 3 years, and directly irrigating the roots with the nano-selenium SOD nutrient solution during 6-8 months; spraying the nano-selenium SOD nutrient solution on the leaves in the spring of the 4 th year, then spraying the nano-selenium SOD nutrient solution on the leaves in the autumn of the 4 th year, and directly irrigating the roots with the nano-selenium SOD nutrient solution in the period of 6-8 months.
Preferably, in the step (1), the nano-selenium organic fertilizer comprises nano-selenium SOD nutrient solution, decomposed pig manure, decomposed fallen leaves, soybean straws and grass peat.
The cultivation of ginseng has strict requirements on soil, and the soil with high underground water level, low-lying moisture, poor ventilation, easy hardening, poor drainage, alkalinity and the like is not suitable for cultivating ginseng. Therefore, the soil is firstly ploughed, so that the soil is loose and the drainage is good; and then the nano-selenium organic fertilizer is added to cultivate the land so as to improve the organic matter content of the soil, so that the soil is fertile and beneficial to the robust growth of the ginseng.
Preferably, the dosage ratio of nitrogen, phosphorus and potassium in the nano selenium organic fertilizer is 9-11: 22-24: 11-13.
Research shows that nitrogen can promote the formation of chlorophyll and the growth of stem and leaf, so that ginseng can grow healthily; the phosphorus can promote the root development of the ginseng, enable seeds to be full, and enhance the cold resistance, drought resistance and saline-alkali resistance; potassium can improve photosynthesis, enhance stems, promote root development, delay aging, and improve yield and quality.
Therefore, the proportion of nitrogen, phosphorus and potassium in the fertilizer is particularly important, and the inventor repeatedly researches: the nitrogen, phosphorus and potassium ratio required by the ginseng is approximately 2:0.5:3, and after soil is detected, the soil fertilizer supply characteristics are found as follows: the total nitrogen and alkaline hydrolysis nitrogen content is high, the total phosphorus content is high, but the available phosphorus is deficient, and the available potassium is medium or insufficient. Therefore, the inventor provides a scheme for controlling the nitrogen fertilizer and increasing the application of the potassium fertilizer after conclusion. The phosphorus is easy to fix in the soil, so the application amount of the phosphorus is increased, which is the reason that the content of the phosphorus in the three elements is far more than that of the nitrogen. Repeated verification proves that the growth and development requirements of the ginseng can be best met when the dosage ratio of the nitrogen, the phosphorus and the potassium is 9-11: 22-24: 11-13.
Preferably, the application amount of the nano selenium organic fertilizer is 1.8-2.2 t/mu.
Preferably, in the nano-selenium SOD nutrient solution, the particle size of nano-selenium is less than 200nm, the concentration of nano-selenium is 280-320 mg/L, the content of amino acid is more than or equal to 100g/L, and the SOD content is 20000-30000U/L.
Preferably, in the step (2), in spring of 1 year, the nano-selenium SOD nutrient solution is prepared into a concentration of 4-6 wt.%, and then is further diluted by 28-32 times with water, and then is sprayed, wherein the spraying amount is 0.8-1.2 kg/mu; in autumn of 1 year, preparing the nano-selenium SOD nutrient solution into a concentration of 3-5 wt.%, further adding water for diluting by 28-32 times, and then spraying; the spraying amount is 0.6-0.8 kg/mu.
Preferably, in the step (2), in spring of the 2 nd year, the nano-selenium SOD nutrient solution is prepared into a concentration of 4-6 wt.%, and then is further diluted by water by 24-28 times, and then is sprayed, wherein the spraying amount is 0.8-1.2 kg/mu; in autumn of 2 years, the nano-selenium SOD nutrient solution is prepared into a concentration of 4-6 wt.%, and then is further diluted by 24-28 times with water and then is sprayed; the spraying amount is 0.8-1.2 kg/mu.
Preferably, in the step (3), in spring and autumn of 3 years, the nano-selenium SOD nutrient solution is prepared into a concentration of 4-6 wt.%, and then is further diluted by 25-27 times with water, and then is sprayed, wherein the spraying amount is 0.8-1.2 kg/mu; during 6-8 months of the 3 rd year, preparing the nano-selenium SOD nutrient solution into a concentration of 3-5 wt.%, further adding water for diluting by 25-27 times, and then irrigating roots for 1 time; the amount of the irrigation roots is 3.8-4.2 kg/mu.
Preferably, in the step (3), in spring and autumn of 4 years, the nano-selenium SOD nutrient solution is prepared into a concentration of 4-6 wt.%, and then is further diluted by 30-32 times with water, and then is sprayed, wherein the spraying amount is 0.8-1.2 kg/mu; during 6-8 months in the 4 th year, preparing the nano-selenium SOD nutrient solution into a concentration of 3-5 wt.%, further adding water for diluting by 30-32 times, and then irrigating roots for 1 time; the amount of the irrigation roots is 3.6-3.8 kg/mu.
In the 6-8 month period, the weather is usually dry, so the roots are irrigated at the moment, and the water and the selenium can be supplemented, thereby achieving two purposes at one stroke.
Based on the same technical conception, the invention also provides the selenium-enriched ginseng cultivated by the method.
If the ginseng is allowed to continue to grow to the 5 th to 6 th year, the leaves are sprayed with the nano-selenium SOD nutrient solution in spring and autumn every year, and the roots of the leaves are irrigated with the nano-selenium SOD nutrient solution in autumn. If the ginseng needs to grow for a longer period, the same operation can be carried out, and the selenium content is gradually increased.
The invention has the beneficial effects that:
according to the cultivation method of the selenium-rich ginseng, the nano-selenium SOD nutrient solution is scientifically applied to the leaves and the roots of the ginseng within the growth period of the ginseng, so that the finally obtained ginseng is rich in selenium elements, and the various demands of the market are met.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
The embodiment provides a cultivation method of selenium-enriched ginseng, which comprises the following steps:
(1) land preparation and cultivation: firstly, ploughing the soil to ensure that the soil is loose and the drainage is good; then nano-selenium organic fertilizer consisting of nano-selenium SOD nutrient solution, decomposed pig manure, decomposed fallen leaves, soybean straws and grass peat is added to cultivate the land so as to improve the organic matter content of the soil, so that the soil is fertile and is beneficial to the robust growth of ginseng; wherein the dosage ratio of nitrogen, phosphorus and potassium in the nano selenium organic fertilizer is 9:22:11, the average particle size of nano selenium in the nano selenium SOD nutrient solution is 190nm, the concentration of nano selenium is 280mg/L, the content of amino acid is 100g/L, and the content of SOD is 20000U/L; the application amount of the nano selenium organic fertilizer is 1.8 t/mu;
(2) and (3) field management in 1-2 years: in spring of the 1 st year, after the ginseng seedlings emerge, preparing the nano-selenium SOD nutrient solution into 4 wt.% concentration, further adding water to dilute the solution by 28 times, and then spraying the solution with the spraying amount of 0.8 kg/mu; in autumn of 1 year, the nano-selenium SOD nutrient solution is prepared into 3 wt.% concentration, and then is further diluted by 28 times with water and then sprayed; the spraying dosage is 0.6 kg/mu; in spring of the 2 nd year, the nano-selenium SOD nutrient solution is prepared into 4 wt.% concentration, then is further diluted by water for 24 times, and then is sprayed, wherein the spraying amount is 0.8 kg/mu; in autumn of 2 years, the nano-selenium SOD nutrient solution is prepared into 4 wt.% concentration, and then is further diluted by 24 times by adding water and then is sprayed; the spraying dosage is 0.8 kg/mu;
(3) and (3) field management to 4 th year: in spring and autumn of 3 years, preparing the nano-selenium SOD nutrient solution into 4 wt.% of concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 25 times, and then spraying the nano-selenium SOD nutrient solution with the spraying amount of 0.8 kg/mu; in 6 months of 3 years, preparing the nano-selenium SOD nutrient solution into 3 wt.% concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 25 times, and then irrigating the roots for 1 time; the amount of the irrigated roots is 3.8 kg/mu; in spring and autumn of 4 years, the nano-selenium SOD nutrient solution is prepared into 4 wt.% of concentration, then is further diluted by 30 times of water, and then is sprayed, wherein the spraying amount is 0.8 kg/mu; in 6 months of 4 years, preparing the nano-selenium SOD nutrient solution into 3 wt.% concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 30 times, and then irrigating the roots for 1 time; the amount of the irrigated roots is 3.6 kg/mu.
Example 2
The embodiment provides a cultivation method of selenium-enriched ginseng, which comprises the following steps:
(1) land preparation and cultivation: firstly, ploughing the soil to ensure that the soil is loose and the drainage is good; then nano-selenium organic fertilizer consisting of nano-selenium SOD nutrient solution, decomposed pig manure, decomposed fallen leaves, soybean straws and grass peat is added to cultivate the land so as to improve the organic matter content of the soil, so that the soil is fertile and is beneficial to the robust growth of ginseng; wherein the dosage ratio of nitrogen, phosphorus and potassium in the nano selenium organic fertilizer is 11:24:13, the average particle size of nano selenium in the nano selenium SOD nutrient solution is 180nm, the concentration of nano selenium is 320mg/L, the content of amino acid is 120g/L, and the content of SOD is 30000U/L; the application amount of the nano selenium organic fertilizer is 2.2 t/mu;
(2) and (3) field management in 1-2 years: in spring of 1 year, after the ginseng seedlings emerge, preparing the nano-selenium SOD nutrient solution into 6 wt.% concentration, further adding water to dilute the nutrient solution by 32 times, and then spraying the nutrient solution with the spraying amount of 1.2 kg/mu; in autumn of 1 year, the nano-selenium SOD nutrient solution is prepared into 5 wt.% of concentration, and then is further diluted by 32 times of water and then is sprayed; the spraying dosage is 0.8 kg/mu; in spring of the 2 nd year, the nano-selenium SOD nutrient solution is prepared into 6 wt.% of concentration, then is further diluted by 28 times of water, and then is sprayed, wherein the spraying amount is 1.2 kg/mu; in autumn of 2 years, the nano-selenium SOD nutrient solution is prepared into 6 wt.% of concentration, and then is further diluted by 28 times by adding water and then is sprayed; the spraying dosage is 1.2 kg/mu;
(3) and (3) field management to 4 th year: in spring and autumn of 3 years, preparing the nano-selenium SOD nutrient solution into 6 wt.% of concentration, further adding water to dilute 27 times, and then spraying with the spraying amount of 1.2 kg/mu; in 8 months of 3 years, preparing the nano-selenium SOD nutrient solution into 5 wt.% concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 27 times, and then irrigating the roots for 1 time; the amount of the irrigated roots is 4.2 kg/mu; in spring and autumn of 4 years, preparing the nano-selenium SOD nutrient solution into 6 wt.% of concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 32 times, and then spraying the nano-selenium SOD nutrient solution with the spraying amount of 1.2 kg/mu; in 8 months of 4 years, preparing the nano-selenium SOD nutrient solution into 5 wt.% concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 32 times, and then irrigating the roots for 1 time; the amount of the irrigated roots is 3.8 kg/mu.
Example 3
The embodiment provides a cultivation method of selenium-enriched ginseng, which comprises the following steps:
(1) land preparation and cultivation: firstly, ploughing the soil to ensure that the soil is loose and the drainage is good; then nano-selenium organic fertilizer consisting of nano-selenium SOD nutrient solution, decomposed pig manure, decomposed fallen leaves, soybean straws and grass peat is added to cultivate the land so as to improve the organic matter content of the soil, so that the soil is fertile and is beneficial to the robust growth of ginseng; wherein the dosage ratio of nitrogen, phosphorus and potassium in the nano selenium organic fertilizer is 10:23:12, the average particle size of nano selenium in the nano selenium SOD nutrient solution is 180nm, the concentration of nano selenium is 300mg/L, the content of amino acid is 110g/L, and the content of SOD is 25000U/L; the application amount of the nano selenium organic fertilizer is 2 t/mu;
(2) and (3) field management in 1-2 years: in spring of 1 year, after the ginseng seedlings emerge, preparing the nano-selenium SOD nutrient solution into 5 wt.% concentration, further adding water to dilute the nutrient solution by 30 times, and then spraying the nutrient solution with the spraying amount of 1 kg/mu; in autumn of 1 year, the nano-selenium SOD nutrient solution is prepared into 4 wt.% concentration, and then is further diluted by 30 times by adding water and then is sprayed; the spraying dosage is 0.7 kg/mu; in spring of the 2 nd year, preparing the nano-selenium SOD nutrient solution into 5 wt.% of concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 26 times, and then spraying the nano-selenium SOD nutrient solution with the spraying amount of 1 g/mu; in autumn of 2 years, the nano-selenium SOD nutrient solution is prepared into 5 wt.% of concentration, and then is further diluted by 26 times of water and then is sprayed; the spraying dosage is 1 kg/mu;
(3) and (3) field management to 4 th year: in spring and autumn of 3 years, preparing the nano-selenium SOD nutrient solution into 5 wt.% of concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 26 times, and then spraying the nano-selenium SOD nutrient solution with the spraying amount of 1 kg/mu; in 7 months of 3 years, preparing the nano-selenium SOD nutrient solution into 4 wt.% concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 26 times, and then irrigating the roots for 1 time; the amount of the irrigated roots is 4 kg/mu; in spring and autumn of 4 years, preparing the nano-selenium SOD nutrient solution into 5 wt.% of concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 31 times, and then spraying the nano-selenium SOD nutrient solution with the spraying amount of 1 kg/mu; in 7 months of 4 years, preparing the nano-selenium SOD nutrient solution into 4 wt.% concentration, further adding water to dilute the nano-selenium SOD nutrient solution by 31 times, and then irrigating the roots for 1 time; the amount of the irrigated roots is 3.7 kg/mu.
For effect verification, set up comparative example 1 ~ 8, specifically be:
comparative example 1: the difference from the embodiment 3 is that in spring of 1 year, the nano-selenium SOD nutrient solution is not sprayed on the leaves, and other operations are the same;
comparative example 2: the difference from the embodiment 3 is that in autumn of the 1 st year, the nano-selenium SOD nutrient solution is not sprayed on the leaves, and other operations are the same;
comparative example 3: the difference from the embodiment 3 is that in spring of the 2 nd year, the nano-selenium SOD nutrient solution is not sprayed on the leaves, and other operations are the same;
comparative example 4: the difference from the embodiment 3 is that in autumn of the 2 nd year, the nano-selenium SOD nutrient solution is not sprayed on the leaves, and other operations are the same;
comparative example 5: the difference from the embodiment 3 is that in spring of 3 years, the nano-selenium SOD nutrient solution is not sprayed on the leaves, and other operations are the same;
comparative example 6: the difference from the embodiment 3 is that in autumn of 3 years, the nano-selenium SOD nutrient solution is not irrigated to roots, and other operations are the same;
comparative example 7: the difference from the embodiment 3 is that in spring of 4 years, the nano-selenium SOD nutrient solution is not sprayed on the leaves, and other operations are the same;
comparative example 8: the difference from the example 3 is that in autumn of 4 years, the nano-selenium SOD nutrient solution is not irrigated to roots, and other operations are the same.
After planting, the selenium content of the ginseng obtained in examples 1 to 3 and comparative examples 1 to 8 was measured, and the measurement results are shown in table 1.
TABLE 1 selenium content test results
| Group of | Content/. mu.g/kg |
| Example 1 | 35.2 |
| Example 2 | 33.6 |
| Example 3 | 36.7 |
| Comparative example 1 | 18.3 |
| Comparative example 2 | 17.6 |
| Comparative example 3 | 17.9 |
| Comparative example 4 | 16.4 |
| Comparative example 5 | 18.1 |
| Comparative example 6 | 18.5 |
| Comparative example 7 | 16.6 |
| Comparative example 8 | 15.7 |
As can be seen from Table 1, the selenium content of the ginseng obtained in examples 1 to 3 is significantly higher than that of the ginseng obtained in comparative examples 1 to 8, which indicates that the spraying or root-irrigation of the nano-selenium SOD nutrient solution to the ginseng plays a key role in the final selenium content of the ginseng in spring and autumn of 1 to 4 years.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The cultivation method of the selenium-enriched ginseng is characterized by comprising the following steps:
(1) land preparation and cultivation: ploughing the cultivation land, and applying the nano selenium organic fertilizer to cultivate the land after the cultivation is finished;
(2) and (3) field management in 1-2 years: spraying nano-selenium SOD nutrient solution on the leaves in spring of the 1 st year after the ginseng seedlings, and spraying nano-selenium SOD nutrient solution on the leaves in autumn of the 1 st year; spraying the nano-selenium SOD nutrient solution on the leaves in spring of 2 years, and continuously spraying the nano-selenium SOD nutrient solution on the leaves in autumn of 2 years;
(3) and (3) field management to 4 th year: spraying nano-selenium SOD nutrient solution on the leaves in spring of 3 years, then spraying nano-selenium SOD nutrient solution on the leaves in autumn of 3 years, and directly irrigating the roots with the nano-selenium SOD nutrient solution during 6-8 months; spraying the nano-selenium SOD nutrient solution on the leaves in the spring of the 4 th year, then spraying the nano-selenium SOD nutrient solution on the leaves in the autumn of the 4 th year, and directly irrigating the roots with the nano-selenium SOD nutrient solution in the period of 6-8 months.
2. The cultivation method of the selenium-enriched ginseng as claimed in claim 1, wherein in the step (1), the nano selenium organic fertilizer comprises nano selenium SOD nutrient solution, decomposed pig manure, decomposed fallen leaves, soybean straws and grass peat.
3. The cultivation method of the selenium-enriched ginseng according to claim 2, wherein the dosage ratio of nitrogen, phosphorus and potassium in the nano selenium organic fertilizer is 9-11: 22-24: 11-13.
4. The cultivation method of the selenium-enriched ginseng according to claim 2, wherein the application amount of the nano selenium organic fertilizer is 1.8-2.2 t/mu.
5. The cultivation method of the selenium-enriched ginseng as claimed in claim 1, wherein the nano-selenium SOD nutrient solution contains nano-selenium with a particle size less than 200nm, a nano-selenium concentration of 280-320 mg/L, an amino acid content of not less than 100g/L, and an SOD content of 20000-30000U/L.
6. The cultivation method of the selenium-rich ginseng according to claim 1, wherein in the step (2), in spring of 1 year, the nano-selenium SOD nutrient solution is prepared to have a concentration of 4-6 wt.%, and then is further diluted by 28-32 times with water, and then is sprayed, wherein the spraying amount is 0.8-1.2 kg/mu; in autumn of 1 year, preparing the nano-selenium SOD nutrient solution into a concentration of 3-5 wt.%, further adding water for diluting by 28-32 times, and then spraying; the spraying amount is 0.6-0.8 kg/mu.
7. The cultivation method of the selenium-enriched ginseng according to claim 1, wherein in the step (2), in spring of the 2 nd year, the nano-selenium SOD nutrient solution is prepared to have a concentration of 4-6 wt.%, and then is further diluted by water by 24-28 times, and then is sprayed, wherein the spraying amount is 0.8-1.2 kg/mu; in autumn of 2 years, the nano-selenium SOD nutrient solution is prepared into a concentration of 4-6 wt.%, and then is further diluted by 24-28 times with water and then is sprayed; the spraying amount is 0.8-1.2 kg/mu.
8. The cultivation method of the selenium-enriched ginseng according to claim 1, wherein in the step (3), the nano-selenium SOD nutrient solution is prepared to a concentration of 4-6 wt.% in spring and autumn of 3 years, and then is further diluted by 25-27 times with water, and then is sprayed with an amount of 0.8-1.2 kg/mu; during 6-8 months of the 3 rd year, preparing the nano-selenium SOD nutrient solution into a concentration of 3-5 wt.%, further adding water for diluting by 25-27 times, and then irrigating roots for 1 time; the amount of the irrigation roots is 3.8-4.2 kg/mu.
9. The cultivation method of the selenium-enriched ginseng according to claim 1, wherein in the step (3), the nano-selenium SOD nutrient solution is prepared to a concentration of 4-6 wt.% in spring and autumn of 4 years, and then is further diluted by 30-32 times with water, and then is sprayed with an amount of 0.8-1.2 kg/mu; during 6-8 months in the 4 th year, preparing the nano-selenium SOD nutrient solution into a concentration of 3-5 wt.%, further adding water for diluting by 30-32 times, and then irrigating roots for 1 time; the amount of the irrigation roots is 3.6-3.8 kg/mu.
10. Selenium-enriched ginseng cultivated by the method of any one of claims 1 to 9.
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