Soilless culture method using ore powder sintering matrix

Abstract

The application discloses a soilless culture method using ore powder sintering matrix, and comprises the following steps: providing an ore powder sintering hole disc; placing plant roots in holes, covering the plant roots with ore powder sintering particles to fix the plant roots; placing the bottom of the ore powder sintering hole disc in clean water, and the height of the clean water is not higher than the bottom height in the hole; and regularly spraying nutrient solution to the plant leaves. The application replenishes water by supplying clean water to the bottom of the ore powder sintering hole disc with water absorption and water retention, replenishes minerals by regularly spraying nutrient solution to the plant leaves, avoids pollutants from entering the nutrient solution, thus causing the chemical properties of the nutrient solution to change and causing toxic effects on the crop root system, and at the same time, ensures that the plant roots always maintain a state of water absorption but not immersion. The method can ensure the demand of eating and harvesting the leafy vegetable at any time after the leafy vegetable grows, and ensures that the protein of the leafy vegetable can be fully utilized.

Description

Technical Field

[0001] This invention belongs to the field of soilless cultivation, specifically relating to a soilless cultivation method using a mineral powder sintered substrate. Background Technology

[0002] Edible leaf grass, also known as protein grass, is rich in protein, eighteen kinds of amino acids, vitamin E, ascorbic acid, SOD, and other minerals needed by the human body, earning it the titles of "plant gold mine" and "plant diamond." Edible leaf grass is a perennial plant; once planted, it can be grown for decades without needing to be sown again. Furthermore, it is cold-resistant, drought-resistant, salt-alkali-resistant, tolerant of poor soil, and sandy wasteland, making it adaptable to various soil types.

[0003] The first harvest of leafy greens can be carried out when the plants reach a height of about 40 cm. Leave a stubble of 5-10 mm at harvest to facilitate regrowth. Harvest again when the plants grow to 40-50 cm, and repeat the cycle. Currently, leafy greens are cultivated using either direct seeding in the field or transplanting seedlings. The planting method can be chosen based on the actual conditions.

[0004] (a) Seedling transplanting: Due to the small size of leafy grass seeds, seedling transplanting allows for earlier planting and a higher survival rate. Especially in saline-alkali land, sandy wasteland, and during hot seasons, seedling transplanting is more successful than direct sowing, saves seeds, and produces uniform seedlings that are easier to manage. Although seedling transplanting reduces the amount of seeds, it incurs higher labor costs, resulting in a relatively higher overall cost compared to direct sowing. For large-scale planting, mechanized transplanting can be used.

[0005] (b) Direct seeding in open fields: This method enables mechanized operations and helps save labor. However, it has high requirements for the tillage and plowing of the land, and has certain requirements for soil surface temperature, climate temperature, moisture and other conditions.

[0006] Furthermore, leafy greens are high in protein, making them difficult to store for long periods (calculations show that after harvesting, leafy greens lose more than 35% of their protein content within four hours of being left to rot), and they are prone to decay. Rotten leafy greens are inedible for both humans and animals, and must be preserved and stored as soon as possible after harvesting. Therefore, preserving leafy greens in hot weather and ensuring that urban residents have access to fresh leafy greens presents a significant challenge.

[0007] While soilless cultivation can solve the temperature and moisture problems faced by leafy grasses in greenhouses, traditional substrate cultivation uses organic humus and porous inorganic substrates as seedling substrates to fix the plants. However, organic humus cannot be used for many years and is not suitable for home use. Porous inorganic substrates require drip irrigation or circulating nutrient solution to supply crops, which has high facility system construction costs. During drip irrigation, problems such as capillary dripper blockage or substrate surface dirt accumulation due to impurities and mineral precipitation can occur. Circulating nutrient solution has poor sealing, and contaminants entering the nutrient solution can change its chemical properties and cause poisoning to crop roots. Summary of the Invention

[0008] To address the challenges in planting and harvesting leafy greens, this invention provides a method for soilless cultivation of leafy greens using a mineral powder sintered substrate. This method is also applicable to other leafy vegetables or ornamental plants.

[0009] The technical solution provided by this invention is as follows:

[0010] A soilless cultivation method using a mineral powder sintered substrate includes:

[0011] Provide mineral powder sintering trays;

[0012] Place the plant roots in the hole and cover them with sintered mineral powder particles to fix the plant roots in place;

[0013] Place the bottom of the sintering tray for mineral powder in clean water, ensuring that the water level does not exceed the height of the bottom of the cavity.

[0014] Regularly spray nutrient solution on the plant leaves.

[0015] In some embodiments provided by the present invention, the sintering tray for mineral powder includes:

[0016] A mixture containing mineral powder and organic pore-forming agent is made into a cavity tray blank, which is then sintered to remove the organic pore-forming agent, thus obtaining a porous sintered mineral powder cavity tray.

[0017] In some embodiments provided by the present invention, the mineral powder is at least one of phosphogypsum, desulfurized gypsum, red mud, titanium dioxide slag, carbide slag, yellow phosphorus slag, marble powder, electrolytic manganese slag, fly ash, and coal gangue; the organic pore-forming agent is at least one of straw powder and coconut coir.

[0018] In some embodiments provided by this invention, the plant is a leafy plant.

[0019] In some embodiments provided by this invention, the leafy plant is a leafy grass.

[0020] In some embodiments provided by the present invention, the particle size of the sintered mineral powder particles is 1~15mm.

[0021] In some embodiments provided by the present invention, placing the plant roots in a hole and covering them with sintered mineral powder particles to fix the plant roots includes:

[0022] Plant seeds are placed in holes and covered with sintered mineral powder particles. After the plant seeds germinate, the roots are fixed in the holes by the sintered mineral powder particles.

[0023] In some embodiments provided by this invention, the clean water is either stagnant or circulating clean water.

[0024] In some embodiments provided by this invention, the nutrient solution contains potassium nitrate at a concentration of 0.25~0.26 g / L; Potassium dihydrogen phosphate: 0.13–0.14 g / L; Ammonium dihydrogen phosphate: 0.037–0.045 g / L; Magnesium sulfate: 0.221–0.251 g / L; Manganese sulfate: 0.00161 g / L; Boric acid: 0.0027–0.0029 g / L; Copper sulfate: 0.00006–0.00012 g / L; Zinc sulfate: 0.00017–0.00021 g / L; Ammonium molybdate: 0.000005–0.000013 g / L; Potassium nitrate: 0.2487–0.2527 g / L; Calcium nitrate: 0.2487–0.2527 g / L; Ferric ethylenediaminetetraacetate: 0.008–0.012 g / L; Humic acid extract: 0.005–0.010 g / L.

[0025] In some embodiments provided by the present invention, regularly spraying nutrient solution onto plant leaves includes spraying nutrient solution onto plant leaves every 3 to 10 days to moisten the leaves.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] This invention replenishes moisture by supplying clean water to the bottom of a sintered mineral powder tray with water-absorbing and water-retaining properties, and replenishes minerals by periodically spraying nutrient solution onto the plant leaves. This avoids contaminants entering the nutrient solution, which could alter its chemical properties and cause toxicity to the crop roots. Simultaneously, it ensures that the plant roots maintain a state of water absorption without being soaked. This method guarantees that leafy greens can be consumed and harvested at any time after they mature, ensuring that the protein in the leafy greens is fully utilized. Attached Figure Description

[0028] The accompanying drawings are used to provide an understanding of the technical solutions of the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0029] Figure 1 A top view of the mineral powder sintering tray provided by the present invention;

[0030] Figure 2 This is a schematic diagram of planting leafy grass in a mineral powder sintering tray in Example 1. Detailed Implementation

[0031] The present invention will be further described below with reference to embodiments. This description is only for better illustrating the technical solution of the present invention and not for limiting the claims. The present invention is not limited to the specific embodiments and implementations described herein. Any further improvements and modifications can be easily made by those skilled in the art without departing from the spirit and scope of the present invention, and all such improvements and modifications fall within the protection scope of the present invention.

[0032] Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. While any similar or equivalent methods described herein may be used in the practice or testing of this invention, preferred methods will be described herein.

[0033] To address the challenges of planting and harvesting leafy greens, this invention involves sowing leafy green seeds in sintered mineral powder trays, covering them with sintered mineral powder granules. After germination, the roots are anchored within the granules. Water is supplied to the bottom of the trays to provide hydration. Once young leaves emerge, nutrient solution is sprayed onto the leaves to supplement their mineral needs. In this soilless cultivation method, the entire process—from seedling cultivation, germination, fertilization, growth to harvesting—is completed directly within the sintered mineral powder trays. Alternatively, seeds can be cultivated outside the trays and then transplanted into the trays for fertilization, growth, and harvesting. This achieves soilless cultivation throughout the entire process, enabling the leafy greens to be consumed and harvested as needed, ensuring the full utilization of protein after harvest.

[0034] This invention provides a soilless cultivation method using a sintered mineral powder substrate, comprising: providing a sintered mineral powder seed tray; placing plant roots in the holes and covering them with sintered mineral powder particles to fix the plant roots; placing the bottom of the sintered mineral powder seed tray in clean water, with the water level not exceeding the height of the bottom of the holes; and periodically spraying nutrient solution onto the plant leaves. This method avoids contaminants entering the nutrient solution, thus preventing changes in the chemical properties of the nutrient solution and potential toxicity to crop roots. It also allows for harvesting plants at any time after they have grown, ensuring full utilization of plant nutrients, enabling home cultivation and ornamental planting, and improving convenience and aesthetics. This method enables vertical planting, reducing land use. It eliminates the need for weeding and other tasks associated with soil cultivation, reducing labor and workload, and also reduces the impact of pests on plants.

[0035] In some embodiments of the present invention, providing a mineral powder sintered cavity tray includes: forming a cavity tray blank from a mixture containing mineral powder and an organic pore-forming agent, and sintering it to remove the organic pore-forming agent, thereby obtaining a porous mineral powder sintered cavity tray.

[0036] In some embodiments provided by the present invention, the mineral powder is at least one of phosphogypsum, desulfurized gypsum, red mud, titanium dioxide slag, carbide slag, yellow phosphorus slag, marble powder, electrolytic manganese slag, fly ash, and coal gangue; the organic pore-forming agent is at least one of straw powder and coconut coir.

[0037] In some embodiments provided by this invention, the plant is a leafy plant.

[0038] In some embodiments provided by this invention, the leafy plant is a leafy grass.

[0039] In some embodiments provided by the present invention, the particle size of the sintered mineral powder particles is 1~15mm, which can be formed by crushing a whole block of sintered mineral powder matrix or by sintering small green particles.

[0040] In some embodiments provided by the present invention, placing plant roots in a hole and covering them with sintered mineral powder particles to fix the plant roots includes: placing plant seeds in a hole, covering them with sintered mineral powder particles, and waiting for the plant seeds to germinate.

[0041] In some embodiments provided by this invention, the clean water is either stagnant or circulating clean water.

[0042] In some embodiments provided by this invention, the nutrient solution contains potassium nitrate at a concentration of 0.25~0.26 g / L; Potassium dihydrogen phosphate: 0.13–0.14 g / L; Ammonium dihydrogen phosphate: 0.037–0.045 g / L; Magnesium sulfate: 0.221–0.251 g / L; Manganese sulfate: 0.00161 g / L; Boric acid: 0.0027–0.0029 g / L; Copper sulfate: 0.00006–0.00012 g / L; Zinc sulfate: 0.00017–0.00021 g / L; Ammonium molybdate: 0.000005–0.000013 g / L; Potassium nitrate: 0.2487–0.2527 g / L; Calcium nitrate: 0.2487–0.2527 g / L; Ferric ethylenediaminetetraacetate: 0.008–0.012 g / L; Humic acid extract: 0.005–0.010 g / L.

[0043] In some embodiments provided by the present invention, regularly spraying nutrient solution onto plant leaves includes spraying nutrient solution onto plant leaves every 3 to 10 days to moisten the leaves.

[0044] In some embodiments provided by the present invention, the thickness of the sintering plate of mineral powder is 5 cm or more, preferably 5 to 30 cm.

[0045] The specific technical solutions of the present invention are described below through some exemplary embodiments. Unless otherwise specified, the following embodiments and comparative examples all use the same nutrient solution, which contains potassium nitrate at a concentration of 0.25~0.26 g / L; Potassium dihydrogen phosphate: 0.13–0.14 g / L; Ammonium dihydrogen phosphate: 0.037–0.045 g / L; Magnesium sulfate: 0.221–0.251 g / L; Manganese sulfate: 0.00161 g / L; Boric acid: 0.0027–0.0029 g / L; Copper sulfate: 0.00006–0.00012 g / L; Zinc sulfate: 0.00017–0.00021 g / L; Ammonium molybdate: 0.000005–0.000013 g / L; Potassium nitrate: 0.2487–0.2527 g / L; Calcium nitrate: 0.2487–0.2527 g / L; Ferric ethylenediaminetetraacetate: 0.008–0.012 g / L; Humic acid extract: 0.005–0.010 g / L.

[0046] Unless otherwise specified, the sintered mineral powder particles are made of the same material as the sintered mineral powder trays. The sintered mineral powder particles are formed by crushing a whole piece of sintered mineral powder matrix, and the particle size is continuously graded in the range of 1~15mm.

[0047] Example 1

[0048] (1) Prepared using the preparation method in CN113303198 A as follows Figure 1 The mineral powder sintering tray shown has 11 holes per row, for a total of 5 rows. The hole depth is 10cm, and the distance from the inner bottom of the hole to the bottom of the mineral powder sintering tray is 8cm.

[0049] (11) Prepare 90 parts by weight of electrolytic manganese slag, 3 parts by weight of glass powder, and 5 parts by weight of wheat straw powder. Prepare the required water according to 50% of the total weight of electrolytic manganese slag, glass powder, and wheat straw powder. Add the electrolytic manganese slag, glass powder, and wheat straw powder to the water and stir to mix them to obtain a mixed slurry. Then pour the mixed slurry into the mold for preliminary solidification and molding. When its shape no longer changes, let it stand for 10 hours and remove it from the mold to obtain the green body.

[0050] (12) Firing the green blank at 1200℃ for 2 hours and then naturally cooling it yields the following result: Figure 1 The mineral powder sintering cavity plate shown.

[0051] (2) On the first day, place the mineral powder sintering tray in clean water and immerse it for half an hour. After taking it out, first spread a 3-4 cm thick layer of mineral powder sintering particles in each hole of the mineral powder sintering tray, then sow 5 seeds of leafy grass per hole, and then spread another 3-4 cm thick layer of mineral powder sintering particles. Cover the holes with paper towels, place the mineral powder sintering tray in a water storage tank placed in the shade, and add 3-5 cm of clean water to the water storage tank.

[0052] (3) On the third day, the seeds of the leafy grass germinated. Remove the paper towel covering the surface of the holes and place the water storage tank and the mineral powder sintered seed tray in a place with sufficient light, but avoid direct sunlight. Observe the germination and count the germination rate.

[0053] (4) On the 6th day, the leafy grass grows young leaves; measure the plant height regularly and observe the changes in the plant leaves; from the 20th day onwards, spray the leafy grass leaves with nutrient solution every few days, just enough to moisten the leaves when spraying the nutrient solution.

[0054] Comparative Example 1

[0055] (1) Prepare 10 Prepare a 10-cell sponge substrate seedling tray and a 2-fold diluted nutrient solution. After soaking the sponge substrate in the 2-fold diluted nutrient solution, place it back into the seedling tray and sow 5 seeds of leafy grass per cell. Cover the seedling tray with paper towels and place it in a shady place. Keep the substrate in the seedling tray moist every day and add water as needed.

[0056] (2) On the third day, the seeds of the leafy grass germinated. Remove the paper towel covering the surface and place it in a place with sufficient light, but avoid direct sunlight. Observe the germination and count the germination rate.

[0057] (3) On the 6th day, the leafy grass grows young leaves; measure the plant height regularly and observe the changes in the plant leaves; on the 20th day, transplant the leafy grass along with the sponge substrate into the soil in the greenhouse; thereafter, spray the leafy grass leaves with nutrient solution every few days, just enough to moisten the leaves when spraying the nutrient solution.

[0058] Comparative Example 2

[0059] (1) Prepare sintered mineral powder particles;

[0060] (2) On the first day, place the sintered mineral powder particles in clean water and immerse them for half an hour. After taking them out, sow 5 grains / hole of leafy grass seeds into the sintered mineral powder particles. Cover the surface of the sintered mineral powder particles with paper towels and place them in a shady place. Keep the sintered mineral powder particles moist every day and spray them with clean water as needed.

[0061] (3) On the third day, the seeds of the leafy grass germinate. Remove the paper towel covering the surface and place it in a place with sufficient light, but avoid direct sunlight. Observe the germination and count the germination rate.

[0062] (4) On the 6th day, the leafy grass grows young leaves. Regularly measure the plant height and observe the changes in the plant leaves. From the 20th day, water the roots with clean water and spray nutrient solution on the leaves of the leafy grass. When watering with nutrient solution, just make sure the surface of the nutrient soil is moist. When spraying nutrient solution, just moisten the leaves.

[0063] Comparative Example 3

[0064] (1) Prepare the nutrient soil substrate;

[0065] (2) On the first day, sprinkle leafy grass seeds into the nutrient soil substrate, with 5 leafy grass seeds per group, and water with an appropriate amount of water; cover the surface of the nutrient soil substrate with paper towels, place it in a shady place, keep the nutrient soil substrate moist every day, and spray water as needed;

[0066] (3) On the third day, the seeds of the leafy grass germinate. Remove the paper towel covering the surface and place it in a place with sufficient light, but avoid direct sunlight. Observe the germination and count the germination rate.

[0067] (4) On the 6th day, the leafy grass grows young leaves; thereafter, water the nutrient soil substrate with an appropriate amount of water every few days, measure the plant height regularly, and observe the changes in the plant leaves until the 20th day; when watering, just make sure the surface of the nutrient soil is moist.

[0068] On January 19, 2022, the seeds of Example 1 and Comparative Examples 1-3 were sown simultaneously, and the first harvest of several groups of leafy grasses was carried out on the same day, March 21, 2022. The specific observation and recording results are as follows:

[0069] Day 1: January 19, 2022, greenhouse temperature 15℃, 30 seeds were sown in each of the following groups: Example 1 and Comparative Examples 1-3.

[0070] Day 3: January 21, 2022, greenhouse temperature 16℃. Example 1: 22 sprouts, sprouting rate 73%; Comparative Example 1: 10 sprouts, sprouting rate 33%; Comparative Example 2: 16 sprouts, sprouting rate 53%; Comparative Example 3: 14 sprouts, sprouting rate 47%.

[0071] Day 6: January 25, 2022, greenhouse temperature 15℃; Example 1: 22 seeds produced young leaves; Comparative Example 1: 10 seeds produced young leaves; Comparative Example 2: 16 seeds produced young leaves; Comparative Example 3: 14 seeds produced young leaves; All germinated seeds produced young leaves.

[0072] Day 7: January 26, 2022, greenhouse temperature 23℃; Example 1: plant height 1-1.5cm; Comparative Example 1: plant height 0.5-1cm; Comparative Example 2: plant height 0.5-1cm; Comparative Example 3: plant height 1-1.5cm.

[0073] Day 11: January 30, 2022, greenhouse temperature 18℃; Example 1: plant height 1.5~2cm; Comparative Example 1: plant height 0.8~1.2cm; Comparative Example 2: plant height 1±1.5cm; Comparative Example 3: plant height 1.5~2cm.

[0074] Day 20: February 8, 2022, greenhouse temperature 20℃; Comparative Example 1 was transplanted into the soil inside the greenhouse; both the Example and Comparative Examples were foliar sprayed with nutrient solution.

[0075] Day 26: February 14, 2022, greenhouse temperature 18℃; Example 1: plant height 4~4.5 cm; Comparative Example 1: plant height 2.5~3 cm; Comparative Example 2: plant height 3~3.5 cm. Nutrient solution was sprayed on the leaves of both examples and comparative examples.

[0076] Day 29: February 17, 2022, greenhouse temperature 15℃; Example 1: plant height 4~4.5 cm; Comparative Example 1: plant height 3~3.5 cm; Comparative Example 2: plant height 3.5~4 cm. Nutrient solution was sprayed on the leaves of both examples and comparative examples.

[0077] Day 37: February 25, 2022, greenhouse temperature 24℃; Example 1: Plant height 7cm, three leaves appeared; Comparative Example 1: Plant height 3.5~4cm, three leaves appeared; Comparative Example 2: Plant height 5cm, three leaves appeared. Nutrient solution was sprayed on the leaves of both examples and comparative examples.

[0078] Day 41: March 1, 2022, greenhouse temperature 20℃; Example 1: Plant height 8cm, still three leaves; Comparative Example 1: Plant height not much different from the previous measurement, four leaves appeared; Comparative Example 2: Plant height 7cm, still three leaves. Both examples and comparative examples were foliar sprayed with nutrient solution.

[0079] Day 45: March 5, 2022, greenhouse temperature 23℃; Example 1: Plant height 10-10.5cm, four leaves; Comparative Example 1: Plant height 6.7cm, five leaves; Comparative Example 2: Plant height 9-10cm, four leaves. Both examples and comparative examples were foliar sprayed with nutrient solution. As the edible grass plants grew, their nutrient requirements increased, and the concentration of the nutrient solution was doubled this time.

[0080] Day 48: March 8, 2022, greenhouse temperature 26℃; Example 1: plant height 14~15cm, still four leaves; Comparative Example 1: plant height not much different from the previous measurement, still five leaves; Comparative Example 2: plant height not much different from the previous measurement, still four leaves.

[0081] Day 50: March 10, 2022, greenhouse temperature 26℃; Example 1: plant height 17~19cm, five leaves appeared; Comparative Example 1: plant height not much different from the previous measurement, six leaves appeared; Comparative Example 2: plant height 11~13cm, five leaves appeared.

[0082] Day 54: March 14, 2022, greenhouse temperature 27℃; Example 1: Plant height was not much different from the previous measurement, still with five leaves, leaf length 9.5cm / width 4.5cm; Comparative Example 1: Plant height 7.5cm, still with 6 leaves, leaf length 7cm and width 3.8cm; Comparative Example 2: Plant height was not much different from the previous measurement, still with five leaves.

[0083] Day 56: March 16, 2022, greenhouse temperature 26℃; Example 1: plant height 20cm, still five leaves; Comparative Example 1: plant height 9cm, still 6 leaves, leaf length 8cm, width 3.8cm; Comparative Example 2: plant height 16~18m, still five leaves.

[0084] Day 58: March 18, 2022, greenhouse temperature 16℃; Example 1: plant height 21cm, still five leaves; Comparative Example 1: plant height 10cm, still six leaves; Comparative Example 2: plant height 21cm, still five leaves.

[0085] Day 61: March 21, 2022, greenhouse temperature 11℃; the plant height of the leafy grass in the examples and comparative examples did not change significantly compared to the previous measurement, and was harvested.

[0086] Summary: Plant height changes: The leafy grass in Comparative Example 1 grew to 10cm in 61 days, while the leafy grass in Example 1 and Comparative Example 2 grew to 21cm in 61 days; Plant vigor: Comparative Example 1 > Example 1 > Comparative Example 2.

[0087] Results Analysis: Comparative Example 1 used a sponge substrate for seedling cultivation and transplanted the seedlings into the soil inside the greenhouse. The plant density was relatively sparse, allowing for more open growth space. Therefore, compared to Example 1 and Comparative Example 2, the seedlings grew stronger and developed healthier. Example 1 and Comparative Example 2 had a higher seedling density, and the relatively smaller space encouraged the plants to grow more upwards, resulting in taller plants than in Comparative Example 1. Appropriate spacing in the planting of leafy grass has a significant impact on normal plant development. Furthermore, ambient temperature greatly affects plant growth; plants grow rapidly above 20℃.

[0088] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0089] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A soilless cultivation method using a mineral powder sintered substrate, characterized in that, include: Provide mineral powder sintering trays; The method of providing a mineral powder sintering cavity includes: preparing 90 parts by weight of electrolytic manganese slag, 3 parts by weight of glass powder, and 5 parts by weight of wheat straw powder; preparing water at 50% of the total weight of the electrolytic manganese slag, glass powder, and wheat straw powder; adding the electrolytic manganese slag, glass powder, and wheat straw powder to the water and stirring to obtain a mixed slurry; pouring the mixed slurry into a mold for preliminary solidification; after the shape no longer deforms, leaving it for 10 hours to remove it from the mold to obtain a green body; firing the green body at 1200℃ for 2 hours and allowing it to cool naturally to obtain a mineral powder sintering cavity with a cavity depth of 10cm and a distance of 8cm from the bottom of the cavity to the bottom of the mineral powder sintering cavity; On day 1, place the sintered mineral powder tray in clean water and immerse it for half an hour. After removing it, first spread a 3-4 cm thick layer of sintered mineral powder particles in each cell of the tray, then sow 5 seeds of leafy grass per cell, and then spread another 3-4 cm thick layer of sintered mineral powder particles. Cover the cells with paper towels and place the tray in a water tank placed in a shady place. Add 3-5 cm of clean water to the water tank. The sintered mineral powder particles are made by crushing a whole piece of sintered mineral powder matrix, with a continuous gradation of particle size in the range of 1-15 mm. On the third day, the seeds of the leafy grass germinated, with a germination rate of 73%. Remove the paper towel covering the surface of the holes and place the water storage tank along with the sintered mineral powder tray in a well-lit place, avoiding direct sunlight. On the 6th day, the leafy plant sprouts new leaves; from the 20th day onwards, spray the leafy plant with nutrient solution every few days, just enough to moisten the leaves.

2. The soilless cultivation method using a sintered mineral powder substrate according to claim 1, characterized in that: The clean water is either stagnant or circulating clean water.

Images