Pseudo-ginseng seedling soilless culture substrate and cultivation method thereof

Abstract

The invention provides a pseudo-ginseng seedling soilless culture substrate and a culture method thereof, and relates to the technical field of pseudo-ginseng planting, the pseudo-ginseng seedling soilless culture substrate is prepared by mixing river sand, graded particle size modified biochar, modified coffee bean shell, coco coir, konjaku flour, crushed straw and organic fertilizer; during cultivation, a liquid fertilizer prepared from potassium phosphate, potassium benzoate, magnesium chloride, calcium chloride, zinc sulfate, calcium nitrate, myristicin and urea is adopted for drip irrigation. According to the method, the defects in the prior art are overcome, a proper culture medium is selected, continuous cropping obstacles of panax notoginseng are effectively overcome, soil-borne diseases are prevented, seedling emergence of panax notoginseng sowing and seedling growth are facilitated, and the benefits of panax notoginseng planting are improved.

Description

Technical Field

[0001] The invention relates to the technical field of Panax notoginseng planting, and in particular to a soilless culture medium for Panax notoginseng seedlings and a cultivation method thereof. Background Art

[0002] Panax notoginseng is a perennial herbaceous plant of the genus Panax, Araliaceae, which has the effects of dispersing blood stasis, stopping bleeding, reducing swelling and relieving pain. Panax notoginseng has a narrow distribution range, mainly distributed in Yunnan and Guangxi, China, and is mainly cultivated; due to its excellent medicinal value, the current market demand is large, and because Panax notoginseng has high requirements for planting sites and is sensitive to warm and humid environments, due to environmental deterioration, wild Panax notoginseng is difficult to grow, and currently most of the cultivation is artificial.

[0003] At present, there are serious obstacles to continuous cropping of Panax notoginseng during artificial planting, which has led to a decrease in Panax notoginseng production and poor quality. The planting area has shifted outside Wenshan Prefecture, resulting in poor authenticity of Panax notoginseng medicinal materials. Generally speaking, the rotation interval of Panax notoginseng needs to be more than 8 years to effectively control the diseases and yield of Panax notoginseng planting, and the planting and harvesting cycle of Panax notoginseng is generally more than 3 years, which seriously affects the economic benefits of planting and is not convenient for continuous planting. On this basis, the existing planting technology is mostly to improve the soil or use other crops for intercropping, combined with certain fertilization to reduce the obstacles to continuous cropping of Panax notoginseng soil, but the overall effect is poor.

[0004] Soilless cultivation is a new crop cultivation technology developed in recent decades, mainly including hydroponics, mist (aeroponics) and substrate cultivation. According to the growth habits of Panax notoginseng, the selection of substrate cultivation can meet the normal growth of Panax notoginseng, and the use of soilless substrate for Panax notoginseng planting can overcome the problem of continuous cropping obstacles of Panax notoginseng and effectively save land resources. At present, the substrates for soilless cultivation of Panax notoginseng mainly include peat, river sand, perlite, volcanic ash and other organic fertilizers. The overall effect on the growth of Panax notoginseng seedlings is unsatisfactory. On this basis, in order to further improve the planting efficiency of Panax notoginseng, adjusting and selecting different cultivation substrates is an important research direction for soilless cultivation of Panax notoginseng at this stage. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a soilless cultivation substrate for Panax notoginseng seedlings and a cultivation method thereof, and selects a suitable cultivation substrate to effectively overcome the obstacles to continuous cropping of Panax notoginseng, prevent soil-borne diseases, and at the same time facilitate the emergence of Panax notoginseng seedlings and the growth of seedlings, thereby improving the benefits of Panax notoginseng planting.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A soilless culture matrix for Panax notoginseng seedlings, the soilless culture matrix is ​​composed of the following materials in parts by weight: 4-6 parts of river sand, 6-10 parts of modified biochar with graded particle sizes, 6-8 parts of modified coffee bean shells, 2-4 parts of coconut bran, 3-5 parts of konjac flour, 4-8 parts of straw crushed materials, and 5-7 parts of organic fertilizer; the modified biochar with graded particle sizes is prepared by modifying biochar mixed with an oxidant, subjecting it to microwave drying, grinding and pulverizing the modified biochar, screening and controlling the modified biochar with a particle size of 1-10 μm to account for 20-30% of the total mass of the modified biochar, the modified biochar with a particle size of 50-80 μm to account for 20-30% of the total mass of the modified biochar, and the rest is modified biochar with a particle size of 8-12 mm; the coffee bean shells are prepared by enzymolysis of the coffee bean shells, steaming them, and then microwave drying them.

[0008] Preferably, the method for preparing the graded particle size modified biochar comprises the following steps:

[0009] S1-1. Add potassium permanganate with a mass concentration of 2%-5% to the biochar, treat it in a water bath at 40-60°C for 30-50 minutes, then take it out and rinse it with clean water to obtain the pretreated biochar for use;

[0010] S1-2. The pretreated biochar is microwave-dried at 120-150°C to constant weight, then taken out, ground, and sieved to control the particle size of particles with a diameter of 1-10 μm to account for 20-30% of the total particles, the particle size of particles with a diameter of 50-80 μm to account for 20-30% of the total particles, and the particle size of the remaining particles is 8-12 mm.

[0011] Preferably, the method for preparing the modified coffee bean shell comprises the following steps:

[0012] S2-1, add 2-4 times of clean water to fresh coffee bean shells, mix, add 0.2%-0.3% of cellulase and pectinase of the total weight of fresh coffee bean shells, stir and enzymolyze for 2-3 hours, and then filter to obtain pretreated coffee bean shells for use;

[0013] S2-2, steaming the pretreated coffee bean shells at 100-110° C. for 20-30 min, then taking them out and drying them at 100° C. microwave temperature to constant weight to obtain modified coffee bean shells.

[0014] The preparation method of the soilless culture substrate comprises the following steps:

[0015] S3-1, adding 5-10 times the volume of konjac flour into 60-70° C. warm water and stirring to mix, and obtaining konjac flour liquid for standby use;

[0016] S3-2, mixing the modified biochar with graded particle size and the modified coffee bean shell, adding them to the above konjac powder liquid, stirring and mixing them thoroughly, and drying them at 30-40° C. to a moisture content of ≤12%, to obtain a preliminary premix for standby use;

[0017] S3-3, the preliminary premix is ​​mixed with river sand, coconut bran, crushed straw and organic fertilizer, and stirred evenly to obtain a cultivation medium.

[0018] The method for soilless cultivation of Panax notoginseng using the above-mentioned cultivation medium comprises the following steps:

[0019] (1) laying a cultivation substrate in a planting tray, then sowing Panax notoginseng seeds in the cultivation substrate, covering it with a layer of cultivation substrate after sowing, watering it thoroughly with water, and then covering it with a layer of pine needles;

[0020] (2) Substrate humidity management: Use drip irrigation to control the humidity of the cultivation substrate at 35%-55%;

[0021] (3) Liquid fertilizer is provided according to the following formula: potassium phosphate 40-80 mg / L, potassium benzoate 15-30 mg / L, magnesium chloride 20-40 mg / L, calcium chloride 30-60 mg / L, zinc sulfate 10-15 mg / L, calcium nitrate 20-40 mg / L, myristic ether 5-15 mL / L, urea 20-30 g / L;

[0022] (4) Fertilization method: Drip irrigation with liquid fertilizer once 10-20 days after sowing Panax notoginseng, and then supplement with liquid fertilizer every 30-50 days.

[0023] Preferably, the thickness of the cultivation substrate in step (1) is set to be 20-25 cm.

[0024] Preferably, the sowing method in step (1) is spot sowing, and holes are first punched on the cultivation substrate during spot sowing, with a hole diameter of 1 cm, a hole depth of 2 cm, and an interval of 3-5 cm between each hole.

[0025] Preferably, in step (4), the amount of liquid fertilizer used for drip irrigation at 10-20 days after Panax notoginseng sowing is 10-12 kg / mu, and the amount of liquid fertilizer used for subsequent drip irrigation every 30-50 days is 2-5 kg / mu.

[0026] Preferably, a greenhouse shade environment is set before sowing the Panax notoginseng, and the light transmittance is controlled to 10-20%.

[0027] The present invention provides a soilless cultivation substrate for Panax notoginseng seedlings and a cultivation method thereof, which has the following advantages over the prior art:

[0028] The invention adopts river sand, modified biochar with graded particle size, modified coffee bean shell, coconut bran, konjac flour, crushed straw and organic fertilizer as the cultivation matrix, and less inorganic matter effectively reduces the pollution of subsequent treatment of the cultivation matrix. At the same time, the water and fertilizer retention effect of the matrix is ​​effectively guaranteed by setting the modified biochar with graded particle size, the modified coffee bean shell and the konjac flour, and the skeleton manufacturing effect is achieved to a certain extent, the air permeability of the matrix is ​​achieved, and certain nutrients are provided to promote the emergence and growth of the notoginseng seedlings, and the growth of the seedlings is further improved in combination with subsequent liquid potassium fertilizer, nitrogen fertilizer, calcium fertilizer and myristic ether, etc., the occurrence of soil-borne diseases is reduced, and the economic benefit of planting is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the emergence of Panax notoginseng after 30 days of sowing in the experimental group 1 in the embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the growth of Panax notoginseng seedlings after 4 months of sowing in Experimental Group 1 in the embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the growth of Panax notoginseng seedlings 8 months after sowing in Experimental Group 1 in the embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention is clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] Preparation of cultivation medium

[0035] 1. Raw material preparation:

[0036] 1. Preparation of modified biochar with graded particle size:

[0037] (1) adding potassium permanganate with a mass concentration of 2% to the bamboo charcoal, treating it in a water bath at 40° C. for 50 min, then taking it out and rinsing it with clean water to obtain the pretreated biochar for use;

[0038] (2) The pretreated biochar is microwave-dried at 120°C to constant weight, then taken out, ground, and sieved to control the particle size of particles within the range of 1-10 μm to account for 20% of the total particles, the particle size of particles within the range of 50-80 μm to account for 30% of the total particles, and the particle size of the remaining particles is 8-12 mm, thereby obtaining graded particle size modified biochar.

[0039] 2. Preparation of modified biochar A:

[0040] (1) adding 5% potassium permanganate to bamboo charcoal, treating it in a 60°C water bath for 30 min, then taking it out and rinsing it with clean water to obtain pretreated biochar for use;

[0041] (2) The pretreated biochar was microwave-dried at 150°C to a constant weight, then taken out, ground, and sieved to control the particle size to 1-10 μm, to obtain modified biochar A.

[0042] 3. Preparation of modified biochar B:

[0043] (1) adding 5% potassium permanganate to bamboo charcoal, treating it in a 60°C water bath for 30 min, then taking it out and rinsing it with clean water to obtain pretreated biochar for use;

[0044] (2) The pretreated biochar was microwave-dried at 150° C. to a constant weight, then taken out, ground, and sieved to control the particle size to 8-12 mm, to obtain modified biochar B.

[0045] 4. Biochar:

[0046] Grind the bamboo charcoal into powder and control the particle size to 8-12mm.

[0047] 5. Preparation of coffee bean shell A:

[0048] (1) adding fresh coffee bean shells to 4 times of clean water, mixing, adding 0.2% of the total weight of the fresh coffee bean shells in cellulase and pectinase, stirring and enzymolysis for 3 hours, and then filtering to obtain the pretreated coffee bean shells for later use;

[0049] (2) steaming the pretreated coffee bean shells at 110° C. for 20 min, then taking them out and drying them at 100° C. in a microwave oven until they are constant weight, to obtain coffee bean shells A for later use;

[0050] 6. Preparation of coffee bean shell B:

[0051] (1) adding fresh coffee bean shells to 2 times of clean water, mixing, adding 0.3% of the total weight of the fresh coffee bean shells with cellulase and pectinase, stirring and enzymolysis for 2 hours, and then filtering to obtain the pretreated coffee bean shells for later use;

[0052] (2) taking out the pretreated coffee bean shells and drying them at a microwave temperature of 120° C. to a constant weight, to obtain coffee bean shells B for later use;

[0053] 7. Preparation of straw crushed material:

[0054] Select corn stalks and crush them into a size of ≤2 cm to obtain stalk crushed material;

[0055] 8. Organic fertilizer: chicken manure fermentation fertilizer;

[0056] 2. Preparation of soilless culture medium:

[0057] 1. Preparation of soilless culture medium A:

[0058] (1) Prepare the following raw materials by weight: 4 parts of river sand, 6 parts of graded particle size modified biochar, 6 parts of coffee bean shell A, 2 parts of coconut bran, 3 parts of konjac flour, 4 parts of straw crushed material, and 5 parts of organic fertilizer;

[0059] (2) adding konjac flour into 60° C. warm water with 5 times the volume and stirring to mix, and obtaining konjac flour feed liquid for standby use;

[0060] (3) mixing the modified biochar with graded particle sizes and the modified coffee bean shells, adding the mixture to the konjac powder solution, stirring and mixing the mixture thoroughly, and drying the mixture at 30° C. to a moisture content of ≤12%, thereby obtaining a preliminary premix for later use;

[0061] (4) The preliminary premix is ​​mixed with river sand, coconut husk, crushed straw and organic fertilizer, and stirred evenly to obtain a soilless culture medium A.

[0062] 2. Preparation of soilless culture medium B:

[0063] (1) Prepare the following raw materials by weight: 6 parts of river sand, 10 parts of graded particle size modified biochar, 8 parts of coffee bean shell A, 4 parts of coconut bran, 5 parts of konjac flour, 8 parts of straw crushed material, and 7 parts of organic fertilizer;

[0064] (2) adding konjac flour into 70° C. warm water with 10 times the volume and stirring to mix, and obtaining konjac flour feed liquid for standby use;

[0065] (3) mixing the modified biochar with graded particle sizes and the modified coffee bean shells, adding the mixture to the konjac powder solution, stirring and mixing the mixture thoroughly, and drying the mixture at 40° C. to a moisture content of ≤12%, thereby obtaining a preliminary premix for use;

[0066] (4) The preliminary premix is ​​mixed with river sand, coconut husk, crushed straw and organic fertilizer, and stirred evenly to obtain a soilless culture medium B.

[0067] 3. Preparation of soilless culture medium C:

[0068] The preparation method is the same as that of the soilless culture medium A, except that the graded particle size modified biochar is replaced with the modified biochar A to prepare the soilless culture medium C.

[0069] 4. Preparation of soilless culture medium D:

[0070] The preparation method is the same as that of soilless cultivation matrix A, except that the graded particle size modified biochar is replaced by modified biochar B to prepare soilless cultivation matrix D.

[0071] 5. Preparation of soilless culture medium E:

[0072] The preparation method is the same as that of the soilless culture medium A, except that the graded particle size modified biochar is replaced with biochar to prepare the soilless culture medium E.

[0073] 6. Preparation of soilless culture medium F:

[0074] The preparation method is the same as that of the soilless cultivation medium A, except that the coffee bean shells A are replaced with coffee bean shells B to prepare the soilless cultivation medium F.

[0075] 7. Preparation of soilless culture medium G:

[0076] (1) Prepare the following raw materials in parts by weight: 4 parts of river sand, 6 parts of graded particle size modified biochar, 6 parts of coffee bean shell A, 2 parts of coconut bran, 4 parts of straw crushed material, and 5 parts of organic fertilizer;

[0077] (2) Mixing the modified biochar with graded particle sizes and the modified coffee bean shells, adding 4 times the volume of clean water, stirring and mixing, and drying at 30° C. to a moisture content of ≤12%, to obtain a preliminary premix for use;

[0078] (4) The above preliminary premix is ​​mixed with river sand, coconut husk, crushed straw and organic fertilizer, and stirred evenly to obtain a soilless culture medium G.

[0079] Embodiment 2:

[0080] Method of soilless cultivation of Panax notoginseng seeds:

[0081] 1. Set up liquid fertilizer:

[0082] Using water as solvent, set liquid fertilizers with different formulas according to Table 1 below:

[0083] Table 1

[0084]

[0085]

[0086] 2. Management of soilless cultivation of Panax notoginseng:

[0087] (1) Setting up a shade greenhouse, controlling the light transmittance at 10-20%, laying a cultivation substrate in a planting tray in the greenhouse, controlling the thickness of the laying to be 20-25 cm, sowing Panax notoginseng seeds by sowing on demand, drilling holes on the substrate at intervals of 3-5 cm, with a hole diameter of 1 cm and a hole depth of 2 cm, then placing Panax notoginseng seeds in the holes, covering with a layer of cultivation substrate, and then watering thoroughly, and then laying a layer of pine needles on the cultivation substrate;

[0088] (2) Using drip irrigation, control the humidity of the cultivation medium at 35%-55%;

[0089] (3) Drip irrigation of liquid fertilizer once 15 days after sowing (the specific time is determined by the substrate humidity. If the substrate humidity is high, the time of drip irrigation of liquid fertilizer will be extended accordingly. If the substrate humidity is too low, drip irrigation of liquid fertilizer should be carried out in advance, generally about 10-20 days). The amount is 10-12 kg / mu. Subsequently, liquid fertilizer is supplemented with drip irrigation every 40 days (the specific drip irrigation time is adjusted according to the substrate humidity). The amount is 2-5 kg / mu.

[0090] (4) Remove diseased plants in a timely manner according to the growth conditions of Panax notoginseng during planting.

[0091] Detection:

[0092] Three-year-old mature Panax notoginseng seeds with a thousand-grain weight of 120 g were selected and set into experimental groups 1-9. They were sown and cultivated at the Panax notoginseng planting base in Wenshan Prefecture, Yunnan Province on March 12, 2022 according to the method of the above Example 2. 5,000 Panax notoginseng seeds were sown in each group. The cultivation substrates and liquid fertilizers of different experimental groups were set with reference to Table 2 below:

[0093] Table 2

[0094]

[0095]

[0096] 1. Statistics of germination rate:

[0097] The germination rates of each group were counted at 15d, 30d, and 60d after sowing. The specific results are shown in Table 3 below:

[0098] Table 3

[0099]

[0100] It can be seen from the above table that in experimental group 1-2, Panax notoginseng was able to achieve a high germination rate within 60 days after sowing.

[0101] 2. Detection of agronomic characteristics of Panax notoginseng in soilless cultivation:

[0102] After sowing, the agronomic traits of the seedlings grown in each experimental group were tested on November 15, 2022. 100 Panax notoginseng seedlings were randomly selected from each group. The agronomic traits tested were as follows:

[0103] Plant height: expressed by the length of the stem of Panax notoginseng seedlings;

[0104] Stem diameter: measure the diameter at the middle of the stem of Panax notoginseng seedlings;

[0105] The specific results are shown in Table 4 below:

[0106] Table 4

[0107] Group Plant height (cm) Stem diameter (mm) Experimental Group 1 5.12±0.18cm 1.78±0.21mm Experimental Group 2 5.14±0.20cm 1.76±0.27mm Experimental Group 3 5.02±0.17cm 1.65±0.21mm Experimental Group 4 4.98±0.19cm 1.62±0.18mm Experimental Group 5 4.94±0.21cm 1.56±0.21mm Experimental Group 6 4.96±0.17cm 1.54±0.16mm Experimental Group 7 4.88±0.22cm 1.49±0.19mm Experimental Group 8 4.92±0.20cm 1.69±0.20mm Experimental Group 9 4.82±0.18cm 1.45±0.24mm

[0108] It can be seen from the above table that the growth condition of Panax notoginseng seedlings in experimental group 1-2 is better.

[0109] 3. Disease rate detection:

[0110] After sowing, the seedlings planted in each group were observed every 3 days, the diseased seedlings were promptly removed and sprayed with Bordeaux liquid pesticides, and the diseased seedling rate of each group was recorded until November 15, 2022. The specific results are shown in Table 5 below:

[0111] Table 5

[0112]

[0113] As can be seen from the above table, the Panax notoginseng diseases in experimental groups 1-8 that used soilless culture medium to plant Panax notoginseng were significantly reduced compared to experimental group 9 that used red soil to plant Panax notoginseng.

[0114] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soilless culture medium for Panax notoginseng seedlings, characterized in that: The soilless culture matrix is ​​composed of the following materials by weight: 4-6 parts of river sand, 6-10 parts of graded particle size modified biochar, 6-8 parts of modified coffee bean shells, 2-4 parts of coconut bran, 3-5 parts of konjac flour, 4-8 parts of straw crushed material, and 5-7 parts of organic fertilizer; The graded particle size modified biochar is prepared by subjecting biochar to modified treatment with a mixed oxidant and microwave drying to obtain the modified biochar, which is then ground and pulverized, and the modified biochar with a particle size of 1-10 μm is screened to account for 20-30% of the total mass of the modified biochar, the modified biochar with a particle size of 50-80 μm accounts for 20-30% of the total mass of the modified biochar, and the remainder is the modified biochar with a particle size of 8-12 mm; The coffee bean shells are obtained by enzymatically hydrolyzing the coffee bean shells, steaming the coffee bean shells, and then microwave drying.

2. A soilless culture medium for Panax notoginseng seedlings according to claim 1, characterized in that: The method for preparing the graded particle size modified biochar comprises the following steps: S1-1. Add potassium permanganate with a mass concentration of 2%-5% to the biochar, treat it in a water bath at 40-60°C for 30-50 minutes, then take it out and rinse it with clean water to obtain the pretreated biochar for use; S1-2. The pretreated biochar is microwave-dried at 120-150°C to constant weight, then taken out, ground, and sieved to control the particle size of particles with a diameter of 1-10 μm to account for 20-30% of the total particles, the particle size of particles with a diameter of 50-80 μm to account for 20-30% of the total particles, and the particle size of the remaining particles is 8-12 mm.

3. The soilless culture medium for Panax notoginseng seedlings according to claim 1, characterized in that: The preparation method of the modified coffee bean shell comprises the following steps: S2-1, add 2-4 times of clean water to fresh coffee bean shells, mix, add 0.2%-0.3% of cellulase and pectinase of the total weight of fresh coffee bean shells, stir and enzymolyze for 2-3 hours, and then filter to obtain pretreated coffee bean shells for use; S2-2, steaming the pretreated coffee bean shells at 100-110° C. for 20-30 min, then taking them out and drying them at 100° C. microwave temperature to constant weight to obtain modified coffee bean shells.

4. A soilless culture medium for Panax notoginseng seedlings according to claim 1, characterized in that: The preparation method of the soilless culture substrate comprises the following steps: S3-1, adding 5-10 times the volume of konjac flour into 60-70° C. warm water and stirring to mix, and obtaining konjac flour liquid for standby use; S3-2, mixing the modified biochar with graded particle sizes and the modified coffee bean shells, adding them to the above konjac powder liquid, stirring and mixing them thoroughly, and drying them at 30-40° C. to a moisture content of ≤12%, to obtain a preliminary premix for standby use; S3-3, the preliminary premix is ​​mixed with river sand, coconut bran, crushed straw and organic fertilizer, and stirred evenly to obtain a cultivation medium.

5. A method for soilless cultivation of Panax notoginseng seedlings using the cultivation substrate described in any one of claims 1 to 4, characterized in that: The method of soilless culture comprises the following steps: (1) laying a cultivation substrate in a planting tray, then sowing Panax notoginseng seeds in the cultivation substrate, covering it with a layer of cultivation substrate after sowing, watering it thoroughly with water, and then covering it with a layer of pine needles; (2) Substrate humidity management: Use drip irrigation to control the humidity of the cultivation substrate at 35%-55%; (3) Liquid fertilizer is provided according to the following formula: potassium phosphate 40-80 mg / L, potassium benzoate 15-30 mg / L, magnesium chloride 20-40 mg / L, calcium chloride 30-60 mg / L, zinc sulfate 10-15 mg / L, calcium nitrate 20-40 mg / L, myristic ether 5-15 mL / L, urea 20-30 g / L; (4) Fertilization method: Drip irrigation with liquid fertilizer once 10-20 days after sowing Panax notoginseng, and then supplement with liquid fertilizer every 30-50 days.

6. The method for soilless cultivation according to claim 5, characterized in that: In the step (1), the thickness of the cultivation substrate is set to 20-25 cm.

7. The method for soilless cultivation according to claim 5, characterized in that: The sowing method in step (1) is spot sowing, and holes are first punched on the cultivation substrate during spot sowing. The hole diameter is 1 cm, the hole depth is 2 cm, and the interval between each hole is 3-5 cm.

8. The method for soilless cultivation according to claim 5, characterized in that: In the step (4), the amount of liquid fertilizer used for drip irrigation at 10-20 days after Panax notoginseng sowing is 10-12 kg / mu, and the amount of liquid fertilizer used for additional drip irrigation every 30-50 days is 2-5 kg / mu.

9. The method for soilless cultivation according to claim 5, characterized in that: Before sowing the Panax notoginseng, a greenhouse shade environment is set up to control the light transmittance to 10-20%.

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