Ornamental copper grass flower soil improvement planting method

Abstract

The application discloses an ornamental copper grass flower soil improvement planting method and relates to the field of garden biotechnology, and comprises the following steps: S1, site leveling; S2, seed treatment; S3, seed sowing; S4, transplanting; S5, weeding; S6, fertilization and watering; and S7, disease and pest control. The main advantage of the application is that by controlling watering, using tail sand and planting density, the number of times of watering and fertilization is reduced by planting personnel in the growth process of the copper grass flower, the effect that the soil is not too fertile is achieved, then the use amount of the tail sand in the soil is increased, and therefore, the natural growth environment of the copper grass flower can be better simulated to the tail sand which is rich in copper elements.

Description

Technical Field

[0001] This invention relates to the field of horticultural biotechnology, and in particular to a soil improvement and planting method for ornamental copper grass flowers. Background Technology

[0002] *Elsholtzia ciliata*, scientifically known as *Elsholtzia ciliata*, is a plant belonging to the Lamiaceae family and the *Elsholtzia* genus. It is an erect herb, 30-50 cm tall. The stem is erect, dirty yellowish-purple, covered with nearly two rows of sparse, soft hairs, and much-branched above the base. The branches are vigorous and spreading, with inflorescences at the apex; the internodes are 2-12 cm long. The leaves are ovate-triangular, ovate-oblong to oblong-lanceolate or lanceolate. The spike-like inflorescences are terminal, leaning to one side, and composed of numerous verticillasters; the bracts are nearly orbicular or broadly ovate, with a caudate-acuminate apex. Flowering and fruiting occur from September to November.

[0003] In the current artificial cultivation of ornamental copper grass flowers, the soil is often fertile due to excessive nitrogen, phosphorus, and potassium, resulting in low sand and gravel content. Furthermore, the current planting density is too high, leading to excessive canopy closure and poor ventilation. This causes the copper grass flowers to grow excessively long branches and leaves. Planting in overly fertile soil may also weaken some of the copper grass flower's unique resilience, thus affecting its overall growth.

[0004] Regarding the existing relevant invention patents, the details are as follows:

[0005] Chinese Patent Application No. CN201910853955.4, entitled "A Method for Cultivating Seedlings of Copper Grass Flower," describes a method for harvesting seeds from nearly mature Copper Grass Flower spikes. This method avoids seed loss due to ejection when the spikes mature, thus solving the problem of difficult seed collection. The invention employs an indoor artificial environment to promote the after-ripening of Copper Grass Flower spikes, ensuring seed maturity. Simultaneously, a self-made germination stimulant is used to induce seed germination, solving the problem of low germination rates under natural conditions. Using this method, the average seedling survival rate of Copper Grass Flower reaches 99.87%, demonstrating significant effectiveness. Furthermore, this invention requires no special facilities for the after-ripening treatment of Copper Grass Flower spikes, the induction of seed germination, or seedling cultivation. The reagents used are conventional, inexpensive, and readily available, resulting in low costs.

[0006] While the above solutions address the difficulty of collecting copper grass flower seeds, existing processes suffer from several drawbacks. Excessive nitrogen, phosphorus, and potassium in the soil, coupled with the fact that copper grass flower only requires a certain amount of fertilizer during its growth, means that fertile soil can negatively impact its growth. Furthermore, the root system of copper grass flower is adapted to the loose structure of poor soil; soil compaction increases lateral root penetration resistance by 30%-50%, leading to decreased water absorption efficiency. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a soil improvement and planting method for ornamental copper grass flowers, which solves the problem that soil fertility caused by artificial planting affects the growth of copper grass flowers.

[0008] This invention simulates the original ecological environment of the copper grass flower and reduces the frequency of watering and fertilization during the growth process, while increasing the amount of tailings used. The original ecological simulation means providing the copper grass flower with growth conditions similar to its natural habitat, which helps the copper grass flower to better adapt to the environment and reduces growth problems caused by artificial planting.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A soil improvement planting method for ornamental copper grass flowers includes the following steps:

[0011] S1. Site leveling: Remove garbage and weeds from the copper grass flower ornamental cultivation base site, preserve the original good resources of the site, locate the location of underground pipelines and other infrastructure and mark and protect them, level the slope, apply organic matter and organic fertilizer to the planting area, pre-bury slow-release fertilizer capsules in the organic fertilizer holes, mix the planting soil with tailings, and make micro-topography.

[0012] S2. Seed treatment: After harvesting the whole plant or collecting seed ears, place them on a tarpaulin to dry for one to two days. Then rub the seed ears and clean the seeds. After the seeds are dried, put them in a cloth bag and hang them in a ventilated and dry place for storage. The seeds are coated with a biodegradable membrane containing gibberellin and heavy metal chelating agents to improve the germination rate.

[0013] S3. Sowing seeds: Sprinkle the seeds evenly into the soil, and then moisturize the seeds with a fine mist. Since the seeds of copper grass flower are small, it is easier to make them bloom if you do not cover the surface with a thin layer of soil.

[0014] S4. Transplanting: Propagation is carried out by seedling transplanting. Seedlings are thinned appropriately. In the directly sown plots, the density is adjusted by removing overly dense or weak seedlings. The healthy seedlings that are thinned out are then transplanted to other areas. Transplanting can be done when the seedlings are more than 10cm tall. The plant spacing is 30-50cm. Bare-root transplanting is done at a depth of about 3cm. Transplanting should be done before rain and watered after transplanting.

[0015] S5. Weeding: Because the soil in the copper grass flower ornamental cultivation base is fertile, there are many weeds growing in the copper grass flower planting area. In order to have a better ornamental effect, weeding is carried out five times during the growing season. After rain, weeds are pulled out or cut off the sprouting parts.

[0016] S6. Fertilization and watering: Due to its tolerance to poor soil and resistance to heavy metals, copper grass flower generally does not require fertilization after planting. However, in order to achieve the effect of greening, the seedlings need to be fertilized twice during the growing season. The fertilization method is to spread compound fertilizer before rain and spray Runerjia during the flowering period to promote flowering. Then, the copper grass flower should be watered regularly.

[0017] S7. Pest and disease control: Regular pesticide spraying effectively controls pests and diseases in copper grass flowers.

[0018] As a further improvement of the present invention, in step S1, the organic matter content of the organic fertilizer applied per 100 square meters of planting area is not less than 45% by mass, and the nitrogen, phosphorus pentoxide, and potassium oxide content of each bag of organic fertilizer is not less than 5%. The tailings content in the soil mixture per 100 square meters is 8-10 m³. This improves the efficiency of copper grass flower in nutrient absorption from the soil. Adequate nitrogen, phosphorus, and potassium supply can also promote the growth and development of copper grass flower, increasing its yield and quality. The tailings content of 8-10 m³ per 100 square meters means that while there is sufficient tailings for copper grass flower growth in these areas, the copper grass flower can also play a role in ecological restoration.

[0019] As a further improvement of the present invention, in step S4, the specific transplanting time is from late March to late June. Transplanting can begin when the seedlings are over 10cm tall, with a spacing of 30-50cm between plants to ensure sufficient growing space. Bare-root transplanting is used, with a planting depth of approximately 3cm. Transplanting should ideally be done before rain to reduce water evaporation after transplanting, and watering should be done after planting. This ensures appropriate spacing between plants, promotes ventilation, and reduces the occurrence and spread of pests and diseases. Furthermore, bare-root transplanting is relatively simple and easy to perform, saving manpower, material resources, and financial resources.

[0020] As a further improvement of the present invention, in step S6, a compound fertilizer with a nitrogen, phosphorus, and potassium content of 45% is applied by broadcasting at a rate of 15 kg per acre. This fully meets the needs of the copper grass flower at different growth stages.

[0021] As a further improvement of the present invention, in step S6, the main component of the Runerjia is potassium dihydrogen phosphate, and the phosphorus element in the potassium dihydrogen phosphate is used to promote plant growth and development. This effectively utilizes light energy to convert it into chemical energy, providing power for plant growth.

[0022] As a further improvement of the present invention, in step S6, the watering cycle is once a week at irregular intervals, but from July to September, watering is maintained every 2-3 days. By adjusting the watering cycle, the growth needs of the copper grass flower in different seasons can be better met.

[0023] As a further improvement of the present invention, in step S1, a layer of subsoil with a thickness of 10-20 cm is laid in the backfill area. Tailings and organic fertilizer are mixed and covered, with the tailings content in the planting soil set at 18 m³ per 100 square meters. The organic fertilizer contains no less than 5% nitrogen, phosphorus pentoxide, and potassium oxide. The mixed tailings are then backfilled into the 100-square-meter planting area and leveled using a bulldozer. The combined use of tailings and organic fertilizer enhances the stress resistance of the copper grass flower.

[0024] As a further improvement of the present invention, the tailings are coarsely crushed by a jaw crusher, the coarsely crushed tailings are then subjected to secondary crushing by a cone crusher, and the medium-crushed tailings are crushed into 0-1mm manufactured sand by a VSI sand making machine. The VSI sand making machine ensures that the tailings output particles are round and can directly produce sand particles that meet the standards for medium and fine sand. The crushed tailings are then screened into three different sizes of tailings particles—large, medium, and small—by a circular vibrating screen. The screening is carried out sequentially through 0.25mm, 0.35mm, and 0.5mm screens. Tailings with a particle size of 35mm are classified as small tailings, those with a particle size of 0.35mm to 0.5mm as medium tailings, and those with a particle size of 0.5mm to 1.0mm as large tailings. The mixing of tailings and organic fertilizer involves a layered design with small tailings at the top, medium tailings in the middle, organic fertilizer in the middle, and large tailings at the bottom. This layered design is further refined into a gradient infiltration structure, in which large tailings account for 40%. The medium tailings and organic fertilizer are mixed at a 3:1 ratio. 5-10% palygorskite is added to the fine tailings at the top. The organic fertilizer contains several pores slightly smaller than those in the medium tailings. The tailings of different sizes are separated and screened using a jaw crusher, cone crusher, VSI sand making machine, and circular vibrating screen.

[0025] As a further improvement of the present invention, in step S3, the seeds are sown using a mixture of copper grass flower seeds and alfalfa seeds, wherein the copper grass flower seeds and alfalfa seeds are planted alternately. The alfalfa absorbs the sulfide leachate produced by the tailings, thereby promoting soil structure improvement, increasing soil organic matter content, and enhancing soil fertility.

[0026] Compared with the prior art, the beneficial effects of this invention are as follows:

[0027] 1. By mixing tailings and organic fertilizer with the planting soil, nutrients are gradually released into the soil as the organic matter decomposes, providing a long-lasting and stable supply of nutrients for the copper grass flower. This balanced nutrient release pattern avoids the problems of nutrient excess or deficiency, which is conducive to the healthy growth of the copper grass flower. Furthermore, it reduces nutrient loss and waste caused by repeated fertilization, thereby improving nutrient utilization.

[0028] 2. The combination of fine-grained tailings, organic fertilizer, and coarse-grained tailings increases soil aeration due to the gaps between the larger particles, promoting root respiration and reducing root stress caused by oxygen deficiency. The organic fertilizer in the middle provides abundant nutrients, improves soil structure, increases water and fertilizer retention, and makes the soil more loose and aerated. The fine-grained tailings at the top form a protective layer, slowing down water evaporation and maintaining soil moisture. Simultaneously, the fine-grained tailings prevent soil surface compaction, keeping the soil loose and promoting root growth and expansion.

[0029] 3. By combining fine-grained tailings, organic fertilizer, and coarse-grained tailings, the organic fertilizer slowly infiltrates through the pores of the tailings, allowing for the gradual release of nutrients. This avoids the nutrient waste and soil pollution that can result from large-scale, one-time fertilization. The slow-release effect helps the roots of the copper grass plant absorb nutrients continuously and stably, thereby improving fertilizer utilization. Furthermore, the porous structure of the tailings helps to retain water-soluble nutrients, preventing them from being washed away by rainwater, thus reducing nutrient loss.

[0030] 4. The use of both fine and coarse tailings at the bottom helps reduce soil moisture, preventing root damage from prolonged water immersion. Furthermore, the fine tailings can intercept some impurities and suspended solids in the infiltrated water, thus maintaining smooth soil drainage. With the coarse tailings at the bottom providing excellent permeability, the organic fertilizer in the middle improving soil structure and regulating moisture, and the fine tailings at the top slowing evaporation and filtering impurities, the overall drainage performance of the soil is significantly improved.

[0031] 5. The pores created by the tailings and organic fertilizer, both inside and on the surface of the organic fertilizer, increase the ventilation area, thereby promoting heat dissipation. Covering the organic fertilizer with a layer of fine-grained tailings reduces nutrient evaporation and loss. Laying a layer of medium-sized tailings on top of the organic fertilizer, due to the irregular shape of the gaps between the medium-sized tailings, prevents fine tailings from completely blocking the gaps, thus reducing nutrient evaporation and loss without clogging the organic fertilizer.

[0032] 6. Alternating planting of copper grass and alfalfa can simultaneously absorb copper and sulfide leachate from tailings. This alternation allows each plant to leverage its own advantages, creating a synergistic effect. Alfalfa planting can absorb sulfur pollution from tailings, ensuring that tailings use does not pollute the overall planting environment. Furthermore, copper grass and alfalfa have similar colors, and copper grass typically blooms in late autumn / early winter, while alfalfa blooms in late spring / early summer. Therefore, the mixed planting of copper grass and alfalfa will maintain the ornamental value of this plant community throughout different periods. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described in detail below. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] A soil improvement planting method for ornamental copper grass flowers includes the following steps:

[0035] S1. Site Leveling: The site of the copper grass flower ornamental cultivation base will be cleared of garbage and weeds, preserving existing good resources. The locations of underground pipelines and other infrastructure will be identified, marked, and protected. The slope will be leveled, and organic matter and organic fertilizer will be applied to all planting areas. Slow-release fertilizer capsules will be pre-embedded in the organic fertilizer holes. The planting soil will be mixed with tailings, and the micro-topography will be prepared. The slow-release fertilizer capsules are encased in polylactic acid shells, and their release rate matches the copper grass flower's growth cycle: 30% release during germination and 70% during flowering. Each planting area will be applied with at least 45% organic matter and at least 5% organic fertilizer (nitrogen, phosphorus pentoxide, and potassium oxide). Thirty bags of organic fertilizer will be used per 100 square meters. The planting soil will be mixed with tailings, and the micro-topography will be prepared. The volume of tailings in the planting soil mixture will be 8-10 m³ per 100 square meters. Next, lay a 10-20cm layer of subsoil in the backfill area, then mix the tailings with organic fertilizer and cover it. The tailings content in the mixture should be 18m³ per 100 square meters of planting soil, and the organic fertilizer should contain at least 5% nitrogen, phosphorus pentoxide, and potassium oxide. Backfill the 100 square meter planting area with the mixed tailings and organic fertilizer, and then level it using a bulldozer. By mixing the tailings and organic fertilizer with the planting soil, nutrients are gradually released into the soil as the organic matter decomposes, providing a long-lasting and stable supply of nutrients for the copper grass flower. This balanced nutrient release pattern avoids the problems of nutrient excess or deficiency, which is beneficial to the healthy growth of the copper grass flower. It also reduces nutrient loss and waste caused by repeated fertilization, improving nutrient utilization. Reducing the frequency of fertilization also reduces the stress on the copper grass flower's root system, allowing it to grow and develop more naturally.

[0036] Furthermore, 5%-10% palygorskite is added to the tailings. The tailings and palygorskite are coarsely crushed by a jaw crusher. After coarse crushing, the tailings and palygorskite are then medium crushed by a cone crusher. The medium-crushed tailings and palygorskite are then crushed into 0-1mm manufactured sand by a VSI sand making machine. The VSI sand making machine can ensure that the output tailings and palygorskite have rounded particle shapes and can directly produce sand particles that meet the standards of medium and fine sand. After crushing, the tailings and palygorskite are screened into three different sizes of tailings particles—large, medium, and small—by a circular vibrating screen. The screening is carried out sequentially through 0.25mm, 0.35mm, and 0.5mm screens. The particles with a diameter of 0.25mm~0.35mm are small tailings, the particles with a diameter of 0.35mm~0.5mm are medium tailings, and the particles with a diameter of 0.5mm~1.0mm are large tailings. The layered structure of the mixture of tailings and palygorskite can form natural air channels. The layered capillary channels formed by the disordered overlapping of palygorskite rod crystals, combined with the large, medium and small particle size classification of tailings, construct a three-dimensional air network, which effectively avoids anaerobic respiration inhibition caused by root hypoxia.

[0037] The mixing of tailings and organic fertilizer employs a layered design: small tailings at the top, medium tailings, organic fertilizer in the middle, and large tailings at the bottom. This layered design is further refined into a gradient infiltration structure, with large tailings comprising 40%, medium tailings mixed with organic fertilizer in a 3:1 ratio, and 5-10% palygorskite added to the fine tailings at the top. The organic fertilizer contains several pores slightly smaller than the medium tailings. This creates a good drainage layer at the bottom of the soil through the large tailings particles, quickly draining excess water and preventing waterlogging at the roots. The organic fertilizer slowly infiltrates into the roots of the copper grass plant through the pores of the large tailings, allowing for gradual nutrient release and avoiding the waste caused by large-scale fertilization. The pores inside and on the surface of the organic fertilizer increase ventilation area, promoting heat dissipation. The covering with fine and medium tailings prevents clogging of the organic fertilizer while reducing nutrient evaporation and loss. Tailings may also contain other trace elements that are beneficial to the growth of copper grass flowers. The addition of these elements can regulate the nutrient content of the soil and provide more comprehensive nutritional support for copper grass flowers.

[0038] Example 1 verifies the effects of different tailings contents, palygorskite ratios, slow-release fertilizer capsule application methods, and stratified design on the drainage, nutrient release efficiency, and plant growth of the soil for planting copper grass flowers, and optimizes the site leveling process parameters.

[0039] The comparative data and analysis of the examples are as follows:

[0040] Table 1 Comparison of data under different conditions (1)

[0041]

[0042] Table 2 Comparison of data under different conditions (2)

[0043]

[0044] The two comparison tables above show that: a tailings content of 10 m³ / 100 m² improves drainage efficiency by 10-15% compared to 8 m³, but increases cost by 8%, while a tailings content of 9 m³ balances cost and performance; the permeability is significantly improved by adding 10% palygorskite, but 5% palygorskite already meets basic requirements, and adding palygorskite to the top fine tailings can further improve surface water retention; the use of slow-release fertilizer capsules throughout the entire growth cycle ensures that nutrient release is highly matched with the growth stage, with a 95% survival rate during germination and a 25% increase in the number of flower buds during flowering; and the gradient permeation structure, compared to the layered design, achieves a balance of drainage, fertilizer retention, and permeability by using a ratio of 40%+ large tailings and 3:1 medium tailings to organic fertilizer, and the addition of palygorskite to the top fine tailings reduces organic fertilizer nutrient evaporation and increases utilization by 12%.

[0045] S2. Seed Treatment and Sowing: After harvesting the whole plant or collecting seed spikes, place them on a tarpaulin to dry for one to two days, then rub the seed spikes to clean them. After drying, store the seeds in cloth bags in a well-ventilated and dry place. The seeds are coated using a biodegradable membrane containing gibberellin and heavy metal chelating agents to improve germination rate. When planting, sow the copper grass and alfalfa seeds into the soil in sequence. The backfilled area should be evenly covered with coarse tailings, organic fertilizer, medium tailings, and fine tailings in sequence. This comprehensive approach considers drainage, aeration, and fertility, providing an ideal environment for the root growth of the copper grass. The use of coarse tailings and drainage devices is also beneficial. Because the coarse tailings are at the bottom and have relatively large porosity, bottom drainage devices can more effectively utilize these pores for drainage, reducing the resistance to water penetration in the tailings. Because copper grass has a strong ability to absorb copper, while alfalfa may have a good absorption effect on harmful substances such as sulfides, alternating planting can give full play to their respective advantages, form a synergistic effect, and improve the overall efficiency of soil remediation.

[0046] Example 2: This experiment verified the effects of adjusting seed coating technology, tailings laying method, and mixed sowing ratio on the planting effect of copper grass flower.

[0047] The comparative data and analysis of the examples are as follows:

[0048] Table 3. Summary and Comparison of Seed Treatment and Sowing Methods

[0049]

[0050] The comparison table above shows that the germination rate of uncoated plants is only 72%, while the germination rate of plants coated with gibberellin and chelating agent increases to 92%, and the heavy metal absorption efficiency is significantly improved. This proves that the chelating agent can activate and passivate heavy metals in the soil and promote copper absorption by *Gynostemma pentaphyllum*. The optimization of the tailings paving method increases copper absorption by 30%, and the covering of fine tailings can reduce nutrient evaporation, resulting in a sulfide degradation rate of 85%.

[0051] S3. Transplanting: A mixture of copper grass and alfalfa seeds is used for sowing, alternating between the two. The copper grass absorbs copper from the tailings, while the alfalfa absorbs the sulfide leachate. This alternating planting leverages their respective advantages, creating a synergistic effect and improving the overall efficiency of soil remediation. Furthermore, since both copper grass and alfalfa are purple, they share a harmonious color scheme. The alfalfa planting absorbs sulfur pollution from the tailings, ensuring that tailings use does not pollute the overall planting environment. The similar colors of copper grass and alfalfa, with copper grass typically blooming in late autumn / early winter and alfalfa blooming in late spring / early summer, ensure that this ornamental plant community remains visually appealing throughout the year.

[0052] Propagation is carried out using seedling transplantation. The specific transplanting time is from late March to late June, with the optimal time being from late March to mid-April. However, provided that cultivation measures are adequate, transplanting can be done before the end of June. The later the transplanting time, the higher the planting density must be to ensure adequate coverage later. The spacing between plants should be controlled between 30 and 50 cm to ensure sufficient growing space. Bare-root transplanting is used, with a planting depth of about 3 cm. Transplanting should ideally be done before rain to reduce water evaporation after transplanting. Water thoroughly after planting. This helps with ventilation between plants and reduces the occurrence and spread of pests and diseases. Moreover, bare-root transplanting is relatively simple and easy to perform, saving manpower, material resources, and financial resources.

[0053] Example 3: In the cultivation of copper grass flower, the optimal time for planting copper grass flower and alfalfa was determined by varying the mixing ratio, transplanting time, and density of copper grass flower and alfalfa.

[0054] The comparative data and analysis of the examples are as follows:

[0055] Table 4 Comparison of mixed sowing and transplanting conditions of copper grass flower and alfalfa

[0056]

[0057] The comparison table above shows that: a 1:1 ratio provides the richest landscape layering while maintaining balanced soil remediation efficiency; a 2:1 ratio prioritizes copper absorption, making it suitable for soils with high copper contamination; and a 1:2 ratio focuses on sulfide purification, making it suitable for areas with sulfide contamination such as tailings ponds. Therefore, for landscaping purposes, transplanting should be prioritized in March-April at a density of 25-30 plants / m²; while for functional restoration, high-density transplanting should be prioritized in May-June at a density of 35-45 plants / m².

[0058] S4. Post-transplanting care: Due to the fertile soil in the copper grass ornamental cultivation base, many weeds grow in the planting area. To improve the ornamental effect, manual weeding should be carried out five times throughout the growing season, removing or cutting off any emerging weeds after rain. To restore greenery, the seedlings need to be fertilized twice during the growing season with a light fertilizer. The fertilization method is to apply 45% compound fertilizer before rain, at a rate of 15 kg per acre. During the flowering period, spray with a fertilizer containing potassium dihydrogen phosphate to promote flowering. Then, water the copper grass regularly, once a week at irregular intervals, but from July to September, water every 2-3 days. By adjusting the watering cycle, the growth needs of the copper grass can be better met in different seasons.

[0059] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A soil improvement planting method for ornamental copper grass flowers, comprising the following steps: S1. Site Leveling: The site of the copper grass flower ornamental cultivation base will be cleared of weeds and garbage, preserving the original good resources of the site. Underground pipeline locations will be located, marked, and protected. The slope will be leveled, and organic fertilizer will be applied to all planting areas. Slow-release fertilizer capsules will be pre-buried in the organic fertilizer holes. Copper tailings will be mixed with the planting soil. The copper tailings will be coarsely crushed using a jaw crusher, then secondary crushed using a cone crusher. The secondary crushed copper tailings will be further crushed into machine-made sand with a particle size ≤1mm using a VSI sand making machine. The VSI sand making machine ensures that the copper tailings output particles are round and can directly produce sand particles that meet the standards for medium and fine sand. After crushing, the copper tailings will be screened into three different sizes—small, medium, and large—using a circular vibrating screen with 0.25mm, 0.35mm, and 0.5mm screens. Particles with a diameter >0.25mm and ≤0.35mm are considered small copper tailings, and particles with a diameter >0.3mm and ≤0.5mm are considered large copper tailings. The copper tailings with a particle size of ≤0.5 mm are classified as medium copper tailings, and those with a particle size >0.5 mm and ≤1.0 mm are classified as large copper tailings. The mixing of copper tailings and organic fertilizer is a layered design with small copper tailings at the top, medium copper tailings, organic fertilizer in the middle, and large copper tailings at the bottom. The layered design is further refined into a gradient infiltration structure, in which large copper tailings account for 40%. The medium copper tailings and organic fertilizer are mixed in a 3:1 ratio. 5-10% palygorskite is added to the small copper tailings at the top. The organic fertilizer has several pores slightly smaller than those of the medium copper tailings, and micro-topography is prepared. A layer of subsoil with a thickness of 10-20 cm is laid in the backfill area. The copper tailings and organic fertilizer are then mixed and covered. The copper tailings content in the planting soil is set at 18 m³ per 100 square meters. The nitrogen, phosphorus pentoxide, and potassium oxide content of the organic fertilizer are all not less than 5%. The mixed copper tailings are backfilled into the 100 square meter planting area and leveled using a bulldozer. S2. Seed treatment: After harvesting the whole plant or collecting seed ears, place them on a tarpaulin to dry for one to two days. Then rub the seed ears and clean the seeds. After the seeds are dried, put them in a cloth bag and hang them in a ventilated and dry place for storage. The seeds are coated with a biodegradable membrane containing gibberellin and heavy metal chelating agents to improve the germination rate. S3. Sowing seeds: Sprinkle the seeds evenly into the soil, and then moisturize the seeds with a fine spray. The sowing of seeds is a mixture of copper grass flower seeds and alfalfa seeds, and the mixed sowing method is to alternate the planting of copper grass flower seeds and alfalfa seeds. S4. Transplanting: Propagation is carried out by seedling transplanting. Seedlings are thinned appropriately. In the directly sown plots, the density is adjusted by removing overly dense or weak seedlings. The healthy seedlings are then transplanted to other areas. Transplanting can be done when the seedlings are more than 10cm tall. The plant spacing is 30-50cm. Bare-root transplanting is used at a depth of 3cm. Transplanting should be done before rain and watered after transplanting. S5. Weeding: Because the soil in the copper grass flower ornamental cultivation base is fertile, there are many weeds growing in the copper grass flower planting area. In order to have a better ornamental effect, weeding is carried out five times during the growing season. After rain, weeds are pulled out or cut off the sprouting parts. S6. Fertilization and watering: During the seedling growth period, two light fertilizers need to be applied. The fertilization method is to spread compound fertilizer before rain and spray Runerjia during the flowering period to promote flowering. Then, water the copper grass flower regularly. S7. Pest and disease control: Regularly spray pesticides to control pests and diseases in copper grass flowers.

2. The soil improvement and planting method for ornamental copper grass flowers according to claim 1, characterized in that, In step S4, the transplanting time is from late March to late June. Transplanting can be done when the seedlings are more than 10cm tall. The spacing between plants and rows should be controlled between 30 and 50cm to ensure that there is enough room for growth between plants. Bare-root transplanting is used with a planting depth of 3cm. Transplanting should be done before rain to reduce water evaporation after transplanting. Water thoroughly after planting.

3. The soil improvement and planting method for ornamental copper grass flowers according to claim 1, characterized in that, In step S6, the main component of Runerjia is potassium dihydrogen phosphate, and the phosphorus element in potassium dihydrogen phosphate is used to promote plant growth and development.

4. The soil improvement and planting method for ornamental copper grass flowers according to claim 1, characterized in that, In step S6, the watering cycle is once a week at irregular intervals, but from July to September, watering is maintained once every 2-3 days.

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