Nutrient solution for soilless substrate cultivation and seedling culture of strawberries and preparation method of nutrient solution

Abstract

The invention discloses a nutrient solution for strawberry soilless substrate culture seedling and a preparation method, and belongs to the technical field of soilless culture. Wherein each liter of the nutrient solution comprises the following components: calcium nitrate tetrahydrate, potassium nitrate, ammonium dihydrogen phosphate, magnesium sulfate heptahydrate, monopotassium phosphate, ferric sodium ethylene diamine tetraacetate, boric acid, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate and sodium molybdate dehydrate; the preparation method comprises the following steps: dissolving the components in water, uniformly stirring, and adjusting the nutrient solution to be acidic, thereby obtaining the nutrient solution for soilless substrate culture and seedling culture of strawberries. By applying the nutrient solution prepared by the invention, the development of underground root systems, stem diameter increase, overground leaf growth and plant stress resistance of strawberry seedlings can be remarkably promoted, the nutrient solution is suitable for the whole period of strawberry substrate seedling culture, and theoretical guidance and practical reference can be provided for substrate culture of strawberry seedlings.

Description

Technical Field

[0001] The invention belongs to the technical field of soilless cultivation, and in particular relates to a nutrient solution for strawberry soilless matrix cultivation seedlings and a preparation method thereof. Background Art

[0002] Strawberry (Fragaria × ananassa) is a perennial herbaceous plant in the Rosaceae family and genus Fragaria. Known as the "Queen of Fruits," it boasts vibrant color, a sweet and sour flavor, a rich aroma, and a delicious taste. The fruit is highly nutritious, containing a variety of nutrients such as amino acids, vitamins, minerals, polysaccharides, dietary fiber, and phenols. Highly regarded in the healthcare sector, strawberries also enjoy significant economic value due to their enormous market demand.

[0003] Raising strawberry seedlings is the first step in the entire strawberry cultivation process. Using a substrate for seedling cultivation can greatly reduce soil-borne diseases during the process, ensure the healthy growth of the plants, and shorten the seedling acclimatization period after transplanting the seedlings, thus providing guarantees for early market launch and high yields. However, some farmers still choose soil seedling cultivation. The reason is that the entire technical system of substrate seedling cultivation is not perfect. Substrate cultivation must be used with nutrient solution, and strawberry plants at different developmental stages have different nutritional requirements. Currently, there are only general formulas for strawberry-specific nutrient solutions, and there are no formulas specifically for strawberry substrate seedling cultivation. Therefore, it is of great research significance to screen and optimize the nutrient solution formula according to the growth characteristics and nutritional requirements of strawberry crop varieties during the seedling stage.

[0004] Through searching, we found that there are currently two nutrient solution formulas suitable for strawberry substrate cultivation in my country, namely the Japanese Yamazaki strawberry formula and the strawberry formula of the Beijing Academy of Agricultural and Forestry Sciences Research Center. The two formulas are as follows:

[0005] 1. Japanese Yamazaki strawberry formula: calcium nitrate tetrahydrate 236mg / L, potassium nitrate 303mg / L, ammonium dihydrogen phosphate 57mg / L, magnesium sulfate heptahydrate 123mg / L.

[0006] 2. Strawberry formula of Beijing Academy of Agricultural and Forestry Sciences Research Center: calcium nitrate tetrahydrate 590mg / L, potassium nitrate 404.5mg / L, magnesium sulfate heptahydrate 246.5mg / L, potassium dihydrogen phosphate 76.5mg / L.

[0007] The above formulas were developed in a hydroponic environment without distinguishing between different cultivation periods. When used with organic substrate cultivation and integrated water and fertilizer technology, they can easily lead to fertilizer overuse or nutrient deficiencies. Furthermore, there is little research on formulas that meet the nutritional requirements of specific strawberry substrates for seedling cultivation.

[0008] In view of the fact that most current strawberry nutrient solution formulas are broad-spectrum, lack of specificity and large differences between formulas, the present invention proposes a nutrient solution formula for matrix strawberry seedling cultivation, which can promote the growth performance and stress resistance of strawberry plants during seedling cultivation. Summary of the Invention

[0009] In response to the above technical problems, the present invention provides a nutrient solution for cultivating strawberry seedlings in a soilless matrix and a preparation method thereof. The nutrient solution can improve the utilization rate of fertilizers and promote the growth of the above-ground and underground parts of strawberry seedlings.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] One of the technical solutions of the present invention:

[0012] A nutrient solution for strawberry soilless substrate cultivation seedlings, comprising the following components:

[0013] Calcium nitrate tetrahydrate, potassium nitrate, ammonium dihydrogen phosphate, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, sodium ferric EDTA, boric acid, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, and sodium molybdate dihydrate.

[0014] Beneficial effects: The synergistic effect between the various components in the nutrient solution for strawberry soilless substrate cultivation seedlings disclosed in the present invention achieves efficient and balanced nutrient supply, which not only promotes the growth performance of strawberry seedlings but also improves the stress resistance of the plants, providing strong support for soilless strawberry cultivation. Specifically:

[0015] 1. Accurate ratio of chemical elements: The above chemical elements are dissolved in specific ratios and combinations to improve the effectiveness and absorption efficiency of nutrients. At the same time, the formulation includes macro- and micro-elements to avoid reactions and precipitation between the elements.

[0016] 2. Comprehensive and targeted nutrition: The above nutrients ensure the comprehensive nutritional supply required for strawberry growth, specifically meet the nutritional needs of strawberry seedlings and promote plant growth;

[0017] 3. Enhanced stress resistance: Adequate nutrient supply not only promotes the rapid growth of strawberry seedlings, but also enhances their resistance to diseases, pests and adverse environmental conditions, and improves overall production performance.

[0018] Optionally, each liter of the nutrient solution includes the following components:

[0019] Calcium nitrate tetrahydrate: 826-944 mg / L; Potassium nitrate: 278-606 mg / L; Ammonium dihydrogen phosphate: 28.75-86.25 mg / L; Magnesium sulfate heptahydrate: 246.4-308 mg / L; Potassium dihydrogen phosphate: 34-102 mg / L; Sodium ferric EDTA: 12.85-20.188 mg / L; Boric acid: 0.927-1.7 mg / L; Manganese sulfate monohydrate: 5.07 mg / L; Zinc sulfate heptahydrate: 1.44-2.588 mg / L; Copper sulfate pentahydrate: 0.375-0.499 mg / L; Sodium molybdate dihydrate: 0.302-0.423 mg / L.

[0020] Optionally, each liter of the nutrient solution includes the following components:

[0021] Calcium nitrate tetrahydrate: 826 mg / L; Potassium nitrate: 278 mg / L; Ammonium dihydrogen phosphate: 28.75 mg / L; Magnesium sulfate heptahydrate: 246.4 mg / L; Potassium dihydrogen phosphate: 102 mg / L; Sodium ferric EDTA: 20.188 mg / L; Boric acid: 0.927 mg / L; Manganese sulfate monohydrate: 5.07 mg / L; Zinc sulfate heptahydrate: 2.588 mg / L; Copper sulfate pentahydrate: 0.375 mg / L; Sodium molybdate dihydrate: 0.302 mg / L.

[0022] Optionally, each liter of the nutrient solution includes the following components:

[0023] Calcium nitrate tetrahydrate 826 mg / L, potassium nitrate 606 mg / L, ammonium dihydrogen phosphate 86.25 mg / L, magnesium sulfate heptahydrate 308 mg / L, potassium dihydrogen phosphate 34 mg / L, sodium ferric EDTA 20.188 mg / L, boric acid 0.927 mg / L, manganese sulfate monohydrate 5.07 mg / L, zinc sulfate heptahydrate 1.44 mg / L, copper sulfate pentahydrate 0.499 mg / L and sodium molybdate dihydrate 0.423 mg / L.

[0024] Optionally, each liter of the nutrient solution includes the following components:

[0025] Calcium nitrate tetrahydrate 880 mg / L, potassium nitrate 450 mg / L, ammonium dihydrogen phosphate 60.25 mg / L, magnesium sulfate heptahydrate 290 mg / L, potassium dihydrogen phosphate 70 mg / L, sodium ferric EDTA 17.22 mg / L, boric acid 1.5 mg / L, manganese sulfate monohydrate 5.07 mg / L, zinc sulfate heptahydrate 2.33 mg / L, copper sulfate pentahydrate 0.421 mg / L and sodium molybdate dihydrate 0.357 mg / L.

[0026] The second technical solution of the present invention:

[0027] The method for preparing the nutrient solution for strawberry soilless substrate cultivation seedlings comprises the following steps:

[0028] Weigh the components per liter of nutrient solution and dissolve them in water. Specifically:

[0029] Calcium nitrate tetrahydrate and potassium nitrate were fully stirred and dissolved, which was recorded as solution A;

[0030] Ammonium dihydrogen phosphate, potassium dihydrogen phosphate and magnesium sulfate heptahydrate were fully stirred and dissolved, which was recorded as solution B;

[0031] Sodium ferric EDTA, boric acid, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate and sodium molybdate dihydrate were fully stirred and dissolved, which was recorded as liquid C;

[0032] When in use, the liquid A, liquid B, and liquid C are mixed, and the nutrient solution is adjusted to be acidic to obtain the nutrient solution for cultivating strawberry seedlings in soilless substrate culture.

[0033] Optionally, hydrochloric acid is used to adjust the nutrient solution to be acidic, and the concentration thereof is 1 mol / L.

[0034] Furthermore, the acidic pH is 5.0-6.0, preferably 5.5.

[0035] Optionally, the conductivity of the nutrient solution used for soilless substrate cultivation of strawberry seedlings is 1.2-1.4 mS / cm, preferably 1.3 mS / cm.

[0036] Beneficial effects: The nutrient solution for strawberry soilless substrate cultivation seedlings disclosed in the present invention can better promote the plant's absorption of nutrients by adjusting its pH and EC (electrical conductivity) values, and is more suitable for the growth of strawberries in the seedling stage, meeting their nutritional needs without causing fertilizer damage. Specifically:

[0037] 1. Within the EC value range defined by the present invention, it will not hinder the plant's absorption of nutrients and cause water shortage, and it is sufficient to meet the plant's growth; it avoids too low electrical conductivity leading to reduced yield and slowed growth;

[0038] 2. Within the pH range defined by the present invention, the solubility of nutrients and the efficiency of nutrient absorption by plant roots can be improved, thereby promoting plant growth and development.

[0039] Compared with the prior art, the present invention has the following advantages and technical effects:

[0040] The present invention proposes a special nutrient solution formula for strawberry matrix seedling cultivation, which aims to meet the growth needs of strawberry plants while avoiding the abuse of fertilizers, improving fertilizer utilization, promoting the healthy growth of strawberries, and promoting sustainable agricultural development. This innovation not only provides a scientific and effective solution for strawberry planting, but also provides valuable experience and technical support for soilless cultivation of other crops. And using the nutrient solution prepared by the embodiment of the present invention, the strawberry plants have better indicators such as stem thickness, petiole length, leaf area, SPAD, and total fresh weight than the control group.

[0041] In addition, the application of the nutrient solution prepared by the present invention can significantly promote the development of the underground root system of strawberry seedlings, increase the stem thickness, grow the leaves of the above-ground part and the stress resistance of the plants. It is suitable for the entire cycle of strawberry matrix seedling cultivation and can provide theoretical guidance and practical reference for matrix cultivation of strawberry seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0043] Figure 1 The phenotypes of strawberry plants grown on rockwool substrates, where A and D are plants irrigated with the nutrient solution (TK1) provided in Example 1; B and E are plants irrigated with the Japanese Yamazaki strawberry nutrient solution (CK1-1); C and F are plants irrigated with the strawberry nutrient solution (CK2-1) from the Beijing Academy of Agriculture and Forestry Research Center.

[0044] Figure 2 The phenotypes of strawberry plants grown in peat + coconut husk substrates are shown. Plants A and D are irrigated with the nutrient solution (TK2) provided in Example 1; plants B and E are irrigated with the Japanese Yamazaki strawberry nutrient solution (CK1-2); and plants C and F are irrigated with the strawberry nutrient solution (CK2-2) from the Beijing Academy of Agriculture and Forestry Research Center.

[0045] Figure 3 The phenotypes of strawberry plants grown in a peat + perlite + vermiculite substrate, where A and D are plants irrigated with the nutrient solution (TK3) provided in Example 1; B and E are plants irrigated with the Japanese Yamazaki strawberry nutrient solution (CK1-3); C and F are plants irrigated with the strawberry nutrient solution (CK2-3) from the Beijing Academy of Agriculture and Forestry Research Center.

[0046] Figure 4 Comparison of the aboveground agronomic traits of strawberry seedlings grown under three substrates using the nutrient solution provided in Example 1, the Japanese Yamazaki strawberry nutrient solution, and the strawberry nutrient solution from the Beijing Academy of Agriculture and Forestry Sciences Research Center. A represents petiole length, B represents leaf length, C represents leaf width, D represents leaf area, E represents stem diameter, F represents leaf thickness, and G represents SPAD (relative chlorophyll content).

[0047] Figure 5 The above-ground and underground agronomic traits of strawberry seedlings were compared for each treatment using the nutrient solution provided in Example 1, the Japanese Yamazaki strawberry nutrient solution, and the strawberry nutrient solution from the Beijing Academy of Agricultural and Forestry Sciences Research Center under three substrates, where A represents root fresh weight, B represents stem and leaf fresh weight, C represents root length, D represents root dry weight, and E represents stem and leaf dry weight.

[0048] Figure 6 The plant resistance of strawberry seedlings treated with the nutrient solution provided in Example 1, the Japanese Yamazaki strawberry nutrient solution, and the strawberry nutrient solution from the Beijing Academy of Agriculture and Forestry Sciences Research Center was compared under three substrates, where A represents root activity, B represents malondialdehyde (MDA), C represents polyphenol oxidase (PPO), and D represents superoxide dismutase (SOD). DETAILED DESCRIPTION

[0049] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0050] It should be understood that the terms described herein are intended only to describe particular embodiments and are not intended to limit the present invention. In addition, for numerical ranges herein, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each smaller range between any intermediate value within a stated value or stated range and any other stated value or intermediate value within the stated range is also encompassed by the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0051] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein may also be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of any conflict with any incorporated document, the contents of this specification shall prevail.

[0052] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the description of the invention. The description and examples are intended to be exemplary only.

[0053] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0054] The embodiment of the present invention discloses a nutrient solution formula for growing strawberry seedlings in a matrix. Each liter of the nutrient solution contains the following components: 826-944 mg / L of calcium nitrate tetrahydrate; 278-606 mg / L of potassium nitrate; 28.75-86.25 mg / L of ammonium dihydrogen phosphate; 246.4-308 mg / L of magnesium sulfate heptahydrate; and 34-102 mg / L of potassium dihydrogen phosphate.

[0055] In some optional embodiments, each liter of nutrient solution contains the following components: calcium nitrate tetrahydrate: 826 mg / L; potassium nitrate: 278 mg / L; ammonium dihydrogen phosphate: 28.75 mg / L; magnesium sulfate heptahydrate: 246.4 mg / L; potassium dihydrogen phosphate: 102 mg / L.

[0056] In some optional embodiments, each liter of nutrient solution also includes the following trace elements: sodium ferric EDTA: 12.85-20.188 mg / L; boric acid: 0.927-1.7 mg / L; manganese sulfate monohydrate: 5.07 mg / L; zinc sulfate heptahydrate: 1.44-2.588 mg / L; copper sulfate pentahydrate: 0.375-0.499 mg / L; sodium molybdate dihydrate: 0.302-0.423 mg / L.

[0057] In some optional embodiments, each liter of nutrient solution also includes the following trace elements: sodium ferric EDTA: 20.188 mg / L; boric acid: 0.927 mg / L; manganese sulfate monohydrate: 5.07 mg / L; zinc sulfate heptahydrate: 2.588 mg / L; copper sulfate pentahydrate: 0.375 mg / L; sodium molybdate dihydrate: 0.302 mg / L.

[0058] The embodiment of the present invention also discloses a method for preparing the above-mentioned nutrient solution formula for matrix strawberry seedling cultivation, comprising the following steps:

[0059] In order to ensure that the various components in the nutrient solution formula do not react with each other and do not produce precipitation when mixed, the raw materials need to be divided into three parts: A, B and C and dissolved separately. Specifically:

[0060] Weigh calcium nitrate tetrahydrate and potassium nitrate in proportion, stir and dissolve thoroughly to make up to 200 mL, which is called solution A.

[0061] Weigh ammonium dihydrogen phosphate, potassium dihydrogen phosphate, and magnesium sulfate heptahydrate, stir and dissolve them thoroughly to a volume of 200 mL, which is called solution B.

[0062] Weigh sodium ferric EDTA, boric acid, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, and sodium molybdate dihydrate, stir and dissolve thoroughly to a volume of 200 mL, which is referred to as Solution C.

[0063] When in use, the above-mentioned A, B, and C solutions are mixed in a volume ratio of 1:1:1 and the volume is adjusted to 1 L. The pH and EC values ​​are adjusted to obtain the nutrient solution for matrix strawberry seedling cultivation.

[0064] In some optional embodiments, concentrated hydrochloric acid is used to adjust the pH of the solution after volume is fixed.

[0065] In some optional embodiments, the pH value of the nutrient solution is 5.0-6.0.

[0066] In some optional embodiments, the pH of the nutrient solution is 5.5.

[0067] In some optional embodiments, the conductivity of the nutrient solution is adjusted to 1.2-1.4 mS / cm during use.

[0068] In some optional embodiments, the conductivity of the nutrient solution is adjusted to 1.3 mS / cm during use.

[0069] The raw materials used in the present invention are all purchased from the market.

[0070] The technical solution of the present invention is further illustrated by the following examples.

[0071] Example 1

[0072] A strawberry matrix seedling nutrient solution, each liter of which includes macroelements and trace elements, and the specific formula is shown in Table 1 and Table 2:

[0073] Table 1

[0074]

[0075] Table 2

[0076]

[0077] In actual use, the nutrient solution for the seedling stage is prepared according to the above ratio. The specific steps are as follows:

[0078] 1. Weigh calcium nitrate tetrahydrate and potassium nitrate in proportion, stir thoroughly and dissolve to 200 mL, which is called Solution A.

[0079] 2. Weigh ammonium dihydrogen phosphate, potassium dihydrogen phosphate, and magnesium sulfate heptahydrate in proportion, stir and dissolve thoroughly to a volume of 200 mL, which is referred to as Solution B.

[0080] 3. Weigh sodium ferric EDTA, boric acid, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, and sodium molybdate dihydrate in proportion, stir and dissolve thoroughly to a volume of 200 mL, and record this as Solution C.

[0081] 4. When using, mix liquid A, liquid B, and liquid C in a volume ratio of 1:1:1 and make up to 1L. Adjust the conductivity of the nutrient solution to 1.3mS / cm and use concentrated hydrochloric acid to adjust the pH value of the nutrient solution to 5.5.

[0082] Effect Examples

[0083] The nutrient solution of Example 1 was applied to strawberry matrix seedling cultivation, and the specific process was as follows:

[0084] 1. Experimental Materials

[0085] 'Hongyan' strawberry runners were picked from farmers and planted in cultivation containers.

[0086] TK1: The cultivation container is rock wool (7.5*7.5*6.5cm);

[0087] TK2: The cultivation container is a seedling tray filled with peat + coconut husk (V / V = 6:4);

[0088] TK3: The cultivation container is a seedling tray filled with a substrate of peat + perlite + vermiculite (V / V / V=3:2:2).

[0089] 2. Seedling management

[0090] After the strawberry runners were planted, the nutrient solution provided in Example 1 was diluted to a conductivity of 1.3 mS / cm and a pH of 5.5, and the strawberry runners were irrigated. The irrigation rate was 190-240 mL / plant per week, divided into 2-3 irrigations. Larger seedlings required a greater irrigation rate.

[0091] 3. Determination of Growth Indicators

[0092] Four months after transplanting, the stem diameter at the base of the strawberry plants, leaf thickness, petiole length, leaf length, leaf width, leaf area and relative chlorophyll content of new leaves, fresh weight and dry weight of stems and leaves, fresh weight and dry weight of roots and root length were measured.

[0093] Stem diameter: Use a vernier caliper to measure the shortened stem thickness of the strawberry at the junction of the plant and the substrate in cm;

[0094] Petiole length: Use a ruler to measure the distance from the base of the petiole to the leaf blade in cm;

[0095] Leaf thickness: The leaf thickness at the distance from the leaf tip to the leaf base was measured using a thickness gauge (Qifeng digital high-precision thickness gauge MIMZI, China) in cm.

[0096] Leaf length and width: the length from the base of a new leaf to the tip of the leaf and the widest width of a new leaf, in cm;

[0097] Leaf area: Calculate leaf area as length*width*0.73, in cm 2 ;

[0098] Relative chlorophyll content: New leaves were used for determination using a Konica Minolta SPAD-502Plus portable chlorophyll meter (unit: SPAD).

[0099] Root length of a single plant: Use a ruler to measure the distance from the top of the root to the end of the root in cm;

[0100] Fresh weight and dry weight of stems and leaves: Take the part above the root, dry it in a freeze dryer, and weigh it using an electronic balance. The fresh weight and dry weight before and after are respectively expressed in g;

[0101] Fresh weight and dry weight of roots: Take the roots, use a freeze dryer to dry them, and weigh them using an electronic balance. The fresh weight and dry weight before and after are respectively expressed in g.

[0102] Example 2

[0103] The difference from Example 1 is that the nutrient solution for strawberry soilless substrate cultivation seedlings comprises the following components per liter of the nutrient solution:

[0104] Calcium nitrate tetrahydrate 826 mg / L, potassium nitrate 606 mg / L, ammonium dihydrogen phosphate 86.25 mg / L, magnesium sulfate heptahydrate 308 mg / L, potassium dihydrogen phosphate 34 mg / L, sodium ferric EDTA 20.188 mg / L, boric acid 0.927 mg / L, manganese sulfate monohydrate 5.07 mg / L, zinc sulfate heptahydrate 1.44 mg / L, copper sulfate pentahydrate 0.499 mg / L and sodium molybdate dihydrate 0.423 mg / L.

[0105] Example 3

[0106] The difference from Example 1 is that the nutrient solution for strawberry soilless substrate cultivation seedlings comprises the following components per liter of the nutrient solution:

[0107] Calcium nitrate tetrahydrate 880 mg / L, potassium nitrate 450 mg / L, ammonium dihydrogen phosphate 60.25 mg / L, magnesium sulfate heptahydrate 290 mg / L, potassium dihydrogen phosphate 70 mg / L, sodium ferric EDTA 17.22 mg / L, boric acid 1.5 mg / L, manganese sulfate monohydrate 5.07 mg / L, zinc sulfate heptahydrate 2.33 mg / L, copper sulfate pentahydrate 0.421 mg / L and sodium molybdate dihydrate 0.357 mg / L.

[0108] Comparative Example 1

[0109] The Japanese Yamazaki strawberry nutrient solution was used for effect comparison. The seedling management methods and effect examples were the same, except that the Japanese Yamazaki strawberry nutrient solution was used for watering. According to different cultivation containers, they were marked as CK1-1, CK1-2 and CK1-3.

[0110] The formula of Japanese Yamazaki strawberry nutrient solution per liter is:

[0111] Calcium nitrate tetrahydrate 236 mg / L, potassium nitrate 303 mg / L, ammonium dihydrogen phosphate 57 mg / L, magnesium sulfate heptahydrate 123 mg / L, EC value is 1.3 mS / cm.

[0112] Comparative Example 2

[0113] The strawberry nutrient solution from the Beijing Academy of Agricultural and Forestry Sciences Research Center was used for comparison. The seedling management methods and the results were the same as those in the previous examples. The difference was that the strawberry nutrient solution from the Beijing Academy of Agricultural and Forestry Sciences Research Center was used for irrigation. The nutrient solution was labeled CK2-1, CK2-2, and CK2-3 according to the different cultivation containers.

[0114] The formula of strawberry nutrient solution per liter from Beijing Academy of Agricultural and Forestry Sciences Research Center is:

[0115] Calcium nitrate tetrahydrate 590 mg / L, potassium nitrate 404.5 mg / L, magnesium sulfate heptahydrate 246.5 mg / L, potassium dihydrogen phosphate 76.5 mg / L, EC value is 1.3 mS / cm.

[0116] Figure 1-3 The figure shows the appearance phenotypes of strawberry seedlings grown in different strawberry substrates using different nutrient solutions. As can be seen from the figure, after four months of growth, strawberry runners A and D planted in rockwool, peat + coconut coirrigation, and peat + perlite + vermiculite, watered with the nutrient solution provided in Example 1, showed significantly better appearance phenotypes of their above-ground and below-ground parts than seedlings B and E, C and F grown in the same substrate.

[0117] Figure 4 The above-ground agronomic traits of the nine treatments are compared in Figure 1, CK1-1, and CK2-1 under a rockwool matrix, TK2, CK1-2, and CK2-2 under a peat + coconut husk matrix, and TK3, CK1-3, and CK2-3 under a peat + perlite + vermiculite matrix. Under the same matrix, the petiole length, leaf length, leaf width, leaf area, leaf thickness, stem thickness, and SPAD value of TK1, TK2, and TK3 irrigated with the nutrient solution provided in Example 1 are correspondingly higher than those of the various growth indicators under the CK treatment. Furthermore, the plant growth performance under the peat + coconut husk matrix (TK2) is significantly better, and is significantly higher than the other treatments in terms of leaf area and stem thickness.

[0118] Figure 5Comparisons of aboveground and belowground agronomic traits for nine treatments: TK1, CK1-1, and CK2-1 grown on rockwool; TK2, CK1-2, and CK2-2 grown on peat + coconut coir; and TK3, CK1-3, and CK2-3 grown on peat + perlite + vermiculite. Under the same substrate, the fresh and dry weights of stems and leaves for TK1, TK2, and TK3 treated with the nutrient solution provided in Example 1 were significantly superior to those for the corresponding CK treatments.

[0119] Figure 6 The following is a comparison of plant resistance in nine treatments: TK1, CK1-1, and CK2-1 grown in a rockwool substrate; TK2, CK1-2, and CK2-2 grown in a peat + coconut husk substrate; and TK3, CK1-3, and CK2-3 grown in a peat + perlite + vermiculite substrate. Under the same substrate, with the exception of TK1's PPO, the root activity, PPO, and SOD of TK1, TK2, and TK3, all irrigated with the nutrient solution provided in Example 1, were significantly higher than those of the corresponding CK treatments. Furthermore, MDA, which is negatively correlated with plant resistance, was also lower in TK1, TK2, and TK3 than in the corresponding CK treatments.

[0120] To sum up, the strawberry plant of matrix seedling cultivation under the nutrient solution provided in embodiment 1, the growth performance of its above-ground part is obviously better than other processing, shows that this nutrient solution can improve the thick growth of strawberry seedling stem, the development of plant and the growth of blade and the accumulation of chlorophyll.Simultaneously, the growth amount of the above-ground part of strawberry seedling has also been significantly improved.Not only that, this nutrient solution also can play a good role to the growth of strawberry root system and the accumulation of biomass.In addition, by irrigating this nutrient solution, the activity of root system can also be improved, the activity of resistance-related enzyme is regulated, the stress resistance of plant is strengthened thus.

[0121] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A nutrient solution for strawberry soilless matrix cultivation seedlings, characterized in that, Contains the following components: Calcium nitrate tetrahydrate, potassium nitrate, ammonium dihydrogen phosphate, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, sodium ferric EDTA, boric acid, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, and sodium molybdate dihydrate.

2. A nutrient solution for strawberry soilless matrix cultivation seedlings according to claim 1, characterized in that, Each liter of the nutrient solution includes the following components: Calcium nitrate tetrahydrate 826-944 mg / L, potassium nitrate 278-606 mg / L, ammonium dihydrogen phosphate 28.75-86.25 mg / L, magnesium sulfate heptahydrate 246.4-308 mg / L, potassium dihydrogen phosphate 34-102 mg / L, sodium ferric EDTA 12.85-20.188 mg / L, boric acid 0.927-1.7 mg / L, manganese sulfate monohydrate 5.07 mg / L, zinc sulfate heptahydrate 1.44-2.588 mg / L, copper sulfate pentahydrate 0.375-0.499 mg / L, and sodium molybdate dihydrate 0.302-0.423 mg / L.

3. a nutrient solution for strawberry soilless matrix cultivation seedlings according to claim 2, is characterized in that, Each liter of the nutrient solution includes the following components: Calcium nitrate tetrahydrate 826 mg / L, potassium nitrate 278 mg / L, ammonium dihydrogen phosphate 28.75 mg / L, magnesium sulfate heptahydrate 246.4 mg / L, potassium dihydrogen phosphate 102 mg / L, sodium ferric EDTA 20.188 mg / L, boric acid 0.927 mg / L, manganese sulfate monohydrate 5.07 mg / L, zinc sulfate heptahydrate 2.588 mg / L, copper sulfate pentahydrate 0.375 mg / L and sodium molybdate dihydrate 0.302 mg / L.

4. a nutrient solution for strawberry soilless matrix cultivation seedlings according to claim 2, is characterized in that, Each liter of the nutrient solution includes the following components: Calcium nitrate tetrahydrate 826 mg / L, potassium nitrate 606 mg / L, ammonium dihydrogen phosphate 86.25 mg / L, magnesium sulfate heptahydrate 308 mg / L, potassium dihydrogen phosphate 34 mg / L, sodium ferric EDTA 20.188 mg / L, boric acid 0.927 mg / L, manganese sulfate monohydrate 5.07 mg / L, zinc sulfate heptahydrate 1.44 mg / L, copper sulfate pentahydrate 0.499 mg / L and sodium molybdate dihydrate 0.423 mg / L.

5. a nutrient solution for strawberry soilless matrix cultivation seedlings according to claim 2, is characterized in that, Each liter of the nutrient solution includes the following components: Calcium nitrate tetrahydrate 880 mg / L, potassium nitrate 450 mg / L, ammonium dihydrogen phosphate 60.25 mg / L, magnesium sulfate heptahydrate 290 mg / L, potassium dihydrogen phosphate 70 mg / L, sodium ferric EDTA 17.22 mg / L, boric acid 1.5 mg / L, manganese sulfate monohydrate 5.07 mg / L, zinc sulfate heptahydrate 2.33 mg / L, copper sulfate pentahydrate 0.421 mg / L and sodium molybdate dihydrate 0.357 mg / L.

6. A method for preparing a nutrient solution for strawberry soilless matrix cultivation seedlings, characterized in that: The following steps are involved: Dissolve the components according to any one of claims 1 to 5 in water, specifically: Calcium nitrate tetrahydrate and potassium nitrate were fully stirred and dissolved, which was recorded as solution A; Ammonium dihydrogen phosphate, potassium dihydrogen phosphate and magnesium sulfate heptahydrate were fully stirred and dissolved, which was recorded as solution B; Sodium ferric EDTA, boric acid, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate and sodium molybdate dihydrate were fully stirred and dissolved, which was recorded as liquid C; When in use, the liquid A, liquid B, and liquid C are mixed, and the nutrient solution is adjusted to be acidic to obtain the nutrient solution for cultivating strawberry seedlings in soilless substrate culture.

7. a preparation method for a nutrient solution for strawberry soilless matrix cultivation seedlings according to claim 6, is characterized in that, Hydrochloric acid is used to adjust the nutrient solution to acidity.

8. a preparation method for a nutrient solution for strawberry soilless matrix cultivation seedlings according to claim 7, is characterized in that, The acidic pH is 5.0-6.

0.

9. a preparation method for a nutrient solution for strawberry soilless matrix cultivation seedlings according to claim 6, is characterized in that, The electrical conductivity of the nutrient solution used for strawberry soilless matrix cultivation seedlings is 1.2-1.4 mS / cm.

10. A method for preparing a nutrient solution for strawberry soilless matrix cultivation seedlings according to claim 9, characterized in that, The electrical conductivity of the nutrient solution used for strawberry soilless matrix cultivation seedlings is 1.3 mS / cm.

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