A special nutrient solution for industrial hemp hydroponics and use method thereof

Abstract

The present invention provides a special nutrient solution for industrial hemp hydroponics and a method for using the same, and relates to the technical field of hemp hydroponics. The special nutrient solution for industrial hemp hydroponics adopts improved Hoagland nutrient solution as the base nutrient solution, and is added with total phenols of roxburghii, α-lipoic acid, complex vitamins, salicylic acid, aspirin, etc., wherein the improved Hoagland nutrient solution is to adjust the content of Fe salt solution and trace elements in the Hoagland nutrient solution. The present invention overcomes the shortcomings of the prior art, and the improved special nutrient solution for hemp hydroponics can effectively promote the normal growth of hemp roots and plants, improve the survival rate of seedlings, and further enhance the economic benefits of industrial hemp factory-based and facility-based planting.

Description

Technical Field

[0001] The invention relates to the technical field of hemp hydroponics, and in particular to a nutrient solution specially used for industrial hemp hydroponics and a use method thereof. Background Art

[0002] Cannabis sativa L. is an annual herbaceous plant of the genus Cannabis in the family Cannabaceae, also known as hemp, fire hemp or thread hemp. Industrial hemp is a crop that has been genetically improved, with a tetrahydrocannabinol (THC) content of less than 0.3% in its flowers and leaves, has no drug use value, and can be legally promoted for planting. With the continuous development of the functions of industrial hemp, the use of industrial hemp is no longer limited to fiber, and it has shown great application value in industry, agriculture, medicine, food and other industries. Therefore, efficient, high-yield, and high-quality industrial hemp production technology has become a hot spot in the development of the industrial hemp industry.

[0003] Hydroponics is a method of cultivating plants by combining water and nutrients. It can alleviate the problems caused by soil cultivation, such as reducing the occurrence of pests and diseases and avoiding continuous cropping obstacles, thus realizing the modernization of agricultural production. The hydroponic production of industrial hemp has also begun to develop gradually in recent years. Hydroponic hemp can effectively alleviate the land tension of hemp cultivation and reduce the pests and diseases during hemp cultivation to a certain extent. Different nutrient solutions have different effects on the growth of hydroponic hemp, so the improvement of hydroponic nutrient solution can further realize the efficiency and economic benefits of hemp factory production. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a special nutrient solution for industrial hemp hydroponics and a method of using the same. The improved special nutrient solution for hemp hydroponics can effectively promote the normal growth of hemp roots and plants, improve the survival rate of seedlings, and further improve the economic benefits of industrial hemp factory-based and facility-based planting.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented through the following technical solutions:

[0006] A nutrient solution specially used for hydroponics of industrial hemp, the nutrient solution being composed of a modified Hoagland nutrient solution as a base nutrient solution and the following components added thereto: 20-40 mg / L of roxburghii total phenols, 15-30 mg / L of alpha-lipoic acid, 80-120 mg / L of multivitamins, 10-20 mg / L of salicylic acid, and 10-20 mg / L of aspirin; wherein the macroelements in the modified Hoagland nutrient solution remain unchanged, the components of the Fe salt solution are adjusted to: 20.2 mg / L of FeSO4·7H2O and 12.35 mg / L of Na·EDTA; the components of the trace elements are adjusted to: 0.35 mg / L of KI, 35.5 mg / L of H3BO, 20.34 mg / L of MnSO4·H2O, 10.21 mg / L of ZnSO4·7H2O, 1.29 mg / L of NaMoO4·2H2O, and 1.29 mg / L of CuSO4·5H2O. 0.015mg / L, CoCl2·6H2O 0.10mg / L.

[0007] Preferably, the complex vitamin is a mixture of vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin C, vitamin D3, and vitamin E in a mass ratio of 4:1:1:2:3:4:1:3.

[0008] Preferably, the pH value of the nutrient solution is 5.8-6.2, and the pH is adjusted using 1 mol / L NaOH solution and 1 mol / L HCl solution.

[0009] The method of using the nutrient solution includes the following steps:

[0010] S1. Germination treatment: Place industrial hemp seeds in a culture dish lined with filter paper, add distilled water, and perform germination treatment;

[0011] S2. After 4 days of germination, when normal seedlings with complete radicle and cotyledons have basically formed, select uniform seedlings and plant them in hydroponic pots containing nutrient solution for cultivation.

[0012] S3. When hydroponically growing, control the light duration to 16-18h / d.

[0013] Preferably, the germination treatment in step S1 is carried out by culturing in an incubator at 25°C.

[0014] Preferably, the hydroponic method in step S2 is to set a hydroponic basin, the depth of the nutrient solution in the hydroponic basin is 4.8-5.0 cm, a cover is provided on the top of the hydroponic basin, a cover hole is provided on the cover, a planting basket is placed inside the cover hole, a sponge block with holes is provided inside the planting basket, and the seedlings are transplanted into the sponge block with holes during hydroponic cultivation, and the above-ground part of the seedlings extends upward through the cover hole.

[0015] Preferably, in step S3, the light intensity during hydroponics is controlled to be 2000-4000 Lux.

[0016] Preferably, during the hydroponic process, a water pump is used to control the circulation of the nutrient solution in the hydroponic basin, and the nutrient solution is replenished in time to ensure that the depth of the nutrient solution is 4.8-5.0 cm.

[0017] The present invention provides a nutrient solution for hydroponics of industrial hemp and a method for using the same, which has the following advantages over the prior art:

[0018] The present invention adopts improved Hoagland nutrient solution as the basic nutrient solution, and adds substances such as alpha-lipoic acid and salicylic acid to effectively inhibit the growth of bacteria in the nutrient solution, so that there is no need to change water during the entire hydroponic process, thereby improving the convenience of hydroponic cultivation. In addition, the improved Hoagland nutrient solution assisted by roxburghii total phenols, alpha-lipoic acid, salicylic acid, and aspirin can effectively promote the normal growth of the root system of cannabis during hydroponic cultivation, and further promote the growth of industrial hemp seedlings, effectively shorten the seedling age of cannabis, enable it to develop into large seedlings in a shorter time, improve the efficiency of industrial hydroponic cultivation, and comprehensively improve the economic benefits of hydroponic cultivation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the cannabis planting and germination setting in Example 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the hemp seeds after germination for 4 days in Example 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of placing the young cannabis shoots in a sponge block in Example 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of transplanting cannabis seedlings in a hydroponic bed in Example 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the growth of cannabis hydroponic cultivation at 7 days in experimental group 1 of the present invention;

[0024] Figure 6 This is a schematic diagram of the growth of cannabis hydroponic cultivation at 15 days in experimental group 1 of the present invention;

[0025] Figure 7 This is a schematic diagram of the growth of cannabis hydroponic cultivation at 30 days in experimental group 1 of the present invention;

[0026] Figure 8 This is a schematic diagram of the growth of cannabis hydroponic cultivation at 30 days in experimental group 2 of the present invention;

[0027] Fig. 9 This is a schematic diagram of the growth of cannabis hydroponic cultivation at 30 days in experimental group 3 of the present invention;

[0028] Fig.10 This is a schematic diagram of the growth of cannabis hydroponic cultivation at 30 days in experimental group 7 of the present invention;

[0029] Fig.11 This is a schematic diagram of the root growth of cannabis hydroponically planted for 15 days according to the present invention, wherein A is a schematic diagram of the root growth of experimental group 6; B is a schematic diagram of the root growth of experimental group 7; C is a schematic diagram of the root growth of experimental group 1; and D is a schematic diagram of the root growth of experimental group 3. DETAILED DESCRIPTION

[0030] 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.

[0031] The formula of Hoagland's nutrient solution used in the following examples is shown in Table 1 below:

[0032] Table 1

[0033]

[0034] The formula of the improved Hoagland nutrient solution is shown in Table 2 below:

[0035] Table 2

[0036]

[0037] The complex vitamin is obtained by mixing vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin C, vitamin D3 and vitamin E in a mass ratio of 4:1:1:2:3:4:1:3. Embodiment 1:

[0038] Industrial hemp hydroponic processing:

[0039] The seeds of Yunma No. 1 were selected as planting materials;

[0040] Place filter paper in a petri dish, wet it with water, and then place the seeds on the filter paper (such as Figure 1 As shown), then place the culture dish in the incubator and control the temperature in the incubator at 25°C. Figure 2 Take out the sprouted seedlings, wash the sprouts with clean water and set aside;

[0041] Transplanting cannabis seedlings in a hydroponic bed: Add nutrient solution into the hydroponic pot, and set the depth of the nutrient solution to 4.8-5.0 cm. A cover plate is provided on the top of the hydroponic pot, and a cover plate hole is provided on the cover plate. In addition, the planting basket is hollow and detachable, and a sponge block with holes is provided inside. The above-mentioned young shoots are wrapped with the sponge block, and the buds and leaves extend to the upper end of the sponge block, and the young shoots extend to the lower end of the sponge block (such as Figure 3 The planting basket is then placed in the cover hole of the hydroponic pot for hydroponic culture at room temperature, and the light intensity of the hydroponic culture is 3000Lux, the lighting time is 16h / d, and a water pump is used to control the circulation of the nutrient solution in the hydroponic pot, and the nutrient solution is replenished in time to ensure that the depth of the nutrient solution is 4.8-5.0cm.

[0042] Different cannabis hydroponic groups were set up according to Table 3 below, and nutrient solutions with different formulas were selected. Before use, the pH of each nutrient solution was adjusted to 5.8-6.2 using 1 mol / L NaOH solution and 1 mol / L HCl solution:

[0043] Table 3

[0044]

[0045] Detection:

[0046] Referring to the cannabis hydroponic method of Example 1 above, the nutrient solutions shown in experimental groups 1-7 were used for hydroponic culture, and on May 10, 2024, Yunma No. 1 seedlings with consistent growth were selected for hydroponic culture on the hydroponic bed. Five plants were randomly selected from each group for testing and recording the average values ​​of cannabis plant height (length from the stem base to the growth point), root length, and stem thickness (diameter 1 cm above the base of the stem) at 7d, 15d, and 30d of hydroponic culture. The specific results are shown in Tables 4 to 6 below:

[0047] Table 4 Effect of different nutrient solutions on plant height of cannabis hydroponics at different times

[0048]

[0049] Table 5 Root length test of different nutrient solutions for different time periods of cannabis hydroponics

[0050]

[0051] Table 6 Effect of different nutrient solutions on stem diameter of cannabis hydroponics at different times

[0052]

[0053] From the above tests, it can be seen that the use of the nutrient solution of experimental group 1 and experimental group 2 for hydroponics can effectively promote the growth of cannabis and promote the growth and rooting of the root system. Fig.11It can be seen that the roots of experimental group 1 have more fibrous roots during root growth, and the root system develops more evenly, which effectively promotes the absorption of nutrients by the roots. Although experimental group 3 can promote the elongation of the root system, the overall number of roots is small, and the uniformity of the root system is poor, which can easily affect the growth efficiency of cannabis.

[0054] 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 nutrient solution specifically for hydroponics of industrial hemp, characterized in that: The nutrient solution is composed of improved Hoagland nutrient solution as the base nutrient solution, and is added with the following ingredients: 20-40 mg / L of roxburghii total phenols, 15-30 mg / L of α-lipoic acid, 80-120 mg / L of multivitamins, 10-20 mg / L of salicylic acid, and 10-20 mg / L of aspirin; The major elements in the improved Hoagland nutrient solution remain unchanged, and the composition of Fe salt solution is adjusted to: FeSO4·7H2O 20.2mg / L, Na·EDTA 12.35mg / L; the trace element composition is adjusted to: KI 0.35mg / L, H3BO3 5.5mg / L, MnSO4·H2O20.34mg / L, ZnSO4·7H2O 10.21mg / L, NaMoO4·2H2O 1.29mg / L, CuSO4·5H2O 0.015mg / L, CoCl2·6H2O 0.10mg / L.

2. The special nutrient solution for hydroponics of industrial hemp according to claim 1, characterized in that: The complex vitamin is obtained by mixing vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin C, vitamin D3 and vitamin E in a mass ratio of 4:1:1:2:3:4:1:

3.

3. The nutrient solution for hydroponics of industrial hemp according to claim 1, characterized in that: The pH value of the nutrient solution is 5.8-6.2, and the pH is adjusted by using a 1 mol / L NaOH solution and a 1 mol / L HCl solution.

4. A method for using the special nutrient solution for industrial hemp hydroponics as claimed in any one of claims 1 to 3, characterized in that: The method of use comprises the following steps: S1. Germination treatment: Place industrial hemp seeds in a culture dish lined with filter paper, add distilled water, and perform germination treatment; S2, after germination for 4 days, when normal seedlings with complete radicle and cotyledon have been formed, uniform seedlings are selected and planted in a hydroponic pot with nutrient solution for cultivation; S3. When hydroponically growing, control the light duration to 16-18h / d.

5. The method of use according to claim 4, characterized in that: The germination treatment in step S1 is carried out by culturing the seeds in an incubator at 25°C.

6. The method of use according to claim 4, characterized in that: The hydroponic method in step S2 is to set a hydroponic basin, the depth of the nutrient solution in the hydroponic basin is 4.8-5.0 cm, a cover plate is provided on the top of the hydroponic basin, a cover plate hole is provided on the cover plate, a planting basket is placed inside the cover plate hole, a sponge block with holes is provided inside the planting basket, and the seedlings are transplanted into the sponge block with holes during hydroponic cultivation, and the above-ground part of the seedlings extends upward through the cover plate hole.

7. The method of use according to claim 4, characterized in that: In step S3, the light intensity during hydroponics is controlled to be 2000-4000 Lux.

8. The method of use according to claim 6, characterized in that: The hydroponic method in step S2 is to use a circulator to control the circulation of the nutrient solution in the hydroponic box, and replenish the nutrient solution in time to ensure that the depth of the nutrient solution is 4.8-5.0 cm.

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