Method for cultivating rhizoma polygoni paleacei under forest

Abstract

The invention relates to the technical field of under-forest ecological planting, in particular to a method for under-forest cultivation of rhizoma polygoni paleacei, which comprises the following steps: land selection: selecting a natural forest land with the altitude of 1500-3000 m, fewer weeds, sparse coniferous forest, coniferous and broad-leaved mixed forest and shrub forest as a main part, and the canopy density is less than 0.75; the pH value of the soil is 5.5-7.0; land preparation: removing forest small shrub weeds from September to October, and scraping 1-2 cm surface soil on the ground; collecting bulbils; seedling raising: the compartment width of a seedling raising land is 100-120 cm, 1500-2500 kg of decomposed sheep manure barnyard manure is applied every 667 m < 2 > before sowing, then the compartment surface is covered with fine mountain foundation soil and raw loess with the proportion being 1: (1-5) and the thickness being 2-5 cm, and the compartment surface is raked flat; uniformly scattering the treated bulbils on the seedbed, covering the bulbils with pine needles by 1-2cm after the bulbils are sown, and thoroughly watering; seedling raising; transplanting is conducted; and harvesting. The method accords with the development direction of the national traditional Chinese medicinal material planting industry, integrates green prevention and control of weed diseases, optimizes key node technologies, and is low in planting cost.

Description

Technical Field

[0001] This invention relates to the field of forest understory ecological planting technology, and in particular to a method for cultivating *Dracaena cochinchinensis* under forest cover. Background Technology

[0002] *Bistorta paleacea* (Wall. ex Hook. f.) Yonek. & H. Ohashi is a perennial herb belonging to the genus *Bistorta* in the family Polygonaceae. It grows in cool, moist mountain slopes, forest edges, thickets, and riverbank grasslands. The rhizome is used medicinally, possessing properties of clearing heat and detoxifying, stopping bleeding and dispersing blood stasis. It is used for tonsillitis, pharyngitis, enteritis, dysentery, leukorrhea, metrorrhagia, and hematochezia; externally, it is used to treat traumatic injuries, boils, carbuncles, and external bleeding. Tannin can be extracted from *Bistorta paleacea*, a major food source for the host insects of the valuable medicinal herb *Cordyceps sinensis*. The rhizome and fruit are rich in starch and can be used to brew wine; the tender stems and leaves can be used as animal feed. The whole plant, when crushed and made into powder or solution, can control crop pests and also plays a significant role in improving soil, regulating climate, conserving water and soil, and restoring the ecosystem. Therefore, *Bistorta paleacea* has good development value.

[0003] The current large-scale cultivation of *Dracaena cochinchinensis* involves the use of large amounts of chemical pesticides, which have a significant impact on soil quality over the long term. According to the national "General Rules for Ecological Cultivation of Forest and Grass Medicinal Herbs," inorganic fertilizers and chemical pesticides cannot be used in ecological cultivation in forest areas. This makes it impossible to apply existing cultivation techniques to understory cultivation. Using conventional cultivation methods results in excessively low yields, which seriously affects the enthusiasm of growers and makes it impossible to achieve the goal of large-scale cultivation. Improvement is urgently needed. Summary of the Invention

[0004] The features and advantages of the present invention are set forth in part in the description which follows, or may be apparent from the description, or may be learned by practicing the invention.

[0005] To overcome the problems of existing technologies, this invention provides a method for cultivating *Dracaena sanderiana* under forest cover, comprising the following steps: Site selection: Choose natural forest land with less weeds, mainly sparse coniferous forest, mixed coniferous and broad-leaved forest, and shrub forest at an altitude of 1500-3000 m, with a canopy closure of less than 0.75 and a soil pH of 5.5-7.0; Land preparation: In September and October, remove small shrubs and weeds from the forest floor and scrape off 1-2 cm of topsoil. Till the forest soil 2-3 times to a depth of 20-25 cm. After each tilling, allow the soil to dry in the sun and weather for 15-20 days, then remove dried weeds, tree roots, and gravel. Water the soil during the final tilling to maintain a moisture content of 40-70%, and apply 40-100 kg of wood ash per acre, mixing thoroughly. After 10-20 days of wood ash treatment, apply more ash per 667 m². 2Apply 1000-2000 kg of well-rotted farmyard manure and 20-40 m³ of soil from the mountain base. 3 After the soil and fertilizer are evenly mixed by rotary tillage, the bed is prepared. Collect bulbils: From May to August, collect plump or sprouting bulbils from the lower part of the inflorescence. Collect in batches multiple times on rainy or cloudy days. Spray a small amount of water after collecting on sunny days and sow immediately after collection. Seedling raising: The seedbed width is 100-120 cm, and before sowing, every 667 m² 2 After applying 1500-2500 kg of well-rotted sheep manure, cover the seedbed with fine mountain soil and raw loess, and rake the surface level. The ratio of fine mountain soil to raw loess is 1:1-5, and the thickness is 2-5 cm. Spread the treated bulbils evenly on the seedbed, cover with 1-2 cm of pine needles after sowing, and water thoroughly. During the seedling stage, maintain soil moisture content at 50-80%, ensure the field is free of weeds, and spray the leaves with a biological agent containing Bacillus subtilis and Trichoderma 1-2 times during the seedling stage; Transplanting: Transplant in November-December of the seedling year or January-February of the following year; mix rhizomes cultivated from bulbils with 0.5-1.0% wood ash before transplanting; water the seedbed thoroughly before transplanting, and plant 1-2 days later, or after rain; when transplanting, remove 2-4cm of the topsoil from the seedbed, then place the rhizomes of *Dracaena cochinchinensis*, with a spacing of 7-12cm between plants and rows, cover with 2-4cm of soil, and then cover with a 1-2cm layer of pine needles. Water thoroughly after transplanting. Post-transplanting management: Post-transplanting management includes water management, thinning, weeding, fertilization, and pest and disease control; Harvesting: Harvest in autumn one and a half years after planting.

[0006] Preferably, the water management includes maintaining soil moisture content at 40-80% during planting; ensuring unobstructed drainage in the forest during summer; covering the raised beds with 1-2cm of hillside soil or farmyard manure in winter; and promptly mounding soil or watering when drought is severe.

[0007] Preferably, the thinning includes removing overly dense, diseased, and weak plants while weeding after emergence, and maintaining a plant spacing of about 6-12cm for direct seeding.

[0008] Preferably, the fertilization includes spraying organic water-soluble fertilizer according to the growth conditions; and the hillside soil or farmyard manure covered in winter is dug into the soil in summer in conjunction with weeding.

[0009] Preferably, the pest and disease control includes, at the initial stage of root rot, damping-off, and stem rot, applying Bacillus subtilis and Trichoderma harzianum mixed with soil at a ratio of 1:10-30 or drenching the roots 2-3 times as directed, or spraying or drenching the roots with allicin 1-2 times; when powdery mildew and downy mildew occur, foliar spraying with berberine is used for control; when underground pests are found, applying biological pesticides containing Beauveria bassiana or Metarhizium anisopliae mixed with soil at a ratio of 1:10-30 or drenching the roots 1-2 times; when above-ground pests such as pine caterpillars and aphids are found, foliar spraying with plant extracts containing matrine and / or veratrine is used for control 1-2 times.

[0010] The beneficial effects of this invention are as follows: By precisely controlling the timing of bulbil harvesting and harvesting in batches, and by subjecting the harvested bulbils to low-temperature treatment, the quality of the seeds is guaranteed, with a seed germination rate of over 90% and a seedling survival rate of over 95%. This invention selects woodland with few weeds, selects the appropriate time of September-October for land preparation, clears weeds, scrapes off the topsoil layer, and uses a suitable ratio of raw soil and humus to solve the weeding problem. The labor required for weeding and management is reduced from the conventional 30 man-hours per acre to 5-6 man-hours, significantly reducing planting costs. The method of adding mountain soil and local farmyard manure to the fertilizer, tailored to local conditions, reduces fertilizer costs and achieves ecological planting. This invention aligns with the national development direction of the Chinese medicinal herb planting industry, integrating optimized and improved technologies for key nodes such as green control of weeds and diseases, timely collection and preservation of propagation materials, and moisture and density control. The low planting cost makes it suitable for large-scale promotion and application. Detailed Implementation

[0011] The embodiments of the present invention will be described in further detail below with reference to examples. These examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0012] Example 1

[0013] This invention provides a method for cultivating *Dracaena sanderiana* under forest cover, comprising the following steps: Site selection: Select natural forest land with less weeds and sparse mixed coniferous and broad-leaved forests at an altitude of 2000m, with a canopy closure of 0.6, a slope of ≤25°, a soil pH of slightly acidic 7.0, and an annual rainfall of 2000-2500 mm; Land preparation: In September and October, remove small shrubs and weeds from the forest floor, and scrape off 1-2 cm of topsoil with a hoe; till the forest soil 2-3 times, to a depth of 20-25 cm; after each tilling, allow the soil to dry in the sun and weather for 15 days, then remove dried weeds, tree roots, and gravel; water during the final tilling to ensure soil moisture of 40-70%, and spread 40 kg of wood ash per acre, mixing it thoroughly; after 10 days of wood ash treatment, apply more ash per 667 m². 2 Apply 1000 kg of well-rotted farmyard manure and 20 m³ of soil from the mountain base. 3 As base fertilizer, mix the soil and fertilizer evenly by rotary tillage and then prepare the bed; Collecting bulbils: From May to August, collect plump or sprouting bulbils from the lower part of the inflorescence. Collect in batches multiple times on rainy or cloudy days. Spray a small amount of water after collecting on sunny days. Sow immediately after collection. When transportation and short-term storage are required, store in a foam box with ice packs. The storage temperature should be below 5-10℃. Seedling raising: The seedbed width is 100-120 cm, and before sowing, every 667 m² 2 After applying 1500 kg of well-rotted sheep manure, cover the seedbed with fine mountain soil and raw yellow soil in a 1:1 ratio, 2-5 cm thick, and rake the seedbed level. Spread the treated bulbils evenly on the seedbed, cover with 1-2 cm of pine needles after sowing, and water thoroughly. During the seedling stage, micro-spray water pipes are set in the middle of the seedling bed to maintain soil moisture content of 50-80% and keep the field free of weeds. During the seedling stage, the leaves are sprayed once with biological agents containing Bacillus subtilis, Trichoderma and other biological agents. Transplanting: Transplant in November or December of the same year of seedling cultivation; mix rhizomes cultivated from bulbils with 0.5-1.0% wood ash before transplanting; water the seedbed thoroughly before transplanting, and plant 1-2 days later, or after rain; when transplanting, remove 2-4cm of the topsoil from the seedbed, then place the rhizomes of *Dracaena cochinchinensis*, with a plant spacing of 7-12cm, cover with 2-4cm of soil, and cover with a 1-2cm layer of pine needles. The seedling quantity is 40,000 plants per acre. Water thoroughly after transplanting. Post-transplanting management includes water management, thinning, weeding, fertilization, and pest and disease control. Water management includes maintaining soil moisture content at 40-80% during the planting period; ensuring good drainage in the forest during summer; covering the seedbed with 1-2cm of hillside soil or farmyard manure in winter; and timely hilling or watering during severe drought. Thinning includes removing overly dense, diseased, and weak seedlings while weeding after emergence, maintaining a plant spacing of approximately 6-12cm for direct seeding. Fertilization includes spraying organic water-soluble fertilizer according to growth conditions; the hillside soil or farmyard manure used for winter covering should be turned into the soil during summer weeding. The pest and disease control measures include root rot, damping-off, and stem rot. In the early stages, apply a mixture of Bacillus subtilis and Trichoderma harzianum at a ratio of 1:10 to the soil and apply or drench the roots 2-3 times as directed. Alternatively, spray with allicin as directed or drench the roots 1-2 times. For powdery mildew and downy mildew, foliar spray with berberine. When underground pests such as grubs are found, mix a mixture of biological pesticides containing Beauveria bassiana or Metarhizium anisopliae with soil at a ratio of 1:10 and apply or drench the roots 1-2 times. When above-ground pests such as pine caterpillars and aphids are found, foliar spray with plant extracts containing matrine and / or veratrine 1-2 times.

[0014] Harvesting: Harvest in autumn one and a half years after planting.

[0015] Example 2 This invention provides a method for cultivating *Dracaena sanderiana* under forest cover, comprising the following steps: Site selection: Choose natural woodland with less weeds and sparse shrubs at an altitude of 1500m, with a canopy closure of 0.75, a slope of ≤25°, a soil pH of 5.5 (slightly acidic), and an annual rainfall of 800-1000mm. Land preparation: In September and October, remove small shrubs and weeds from the forest floor, and scrape off 1-2 cm of topsoil with a hoe; till the forest soil 2-3 times, to a depth of 20-25 cm; after each tilling, allow the soil to dry in the sun and weather for 20 days, then remove dried weeds, tree roots, and gravel; water during the final tilling to ensure soil moisture of 40-70%, and spread 100 kg of wood ash per acre, mixing it thoroughly; after 20 days of wood ash treatment, apply more ash per 667 m². 2 Apply 2000 kg of well-rotted farmyard manure and 40 m³ of soil from the mountain base. 3 As base fertilizer, mix the soil and fertilizer evenly by rotary tillage and then prepare the bed; Collecting bulbils: From May to August, collect plump or sprouting bulbils from the lower part of the inflorescence. Collect in batches multiple times on rainy or cloudy days. Spray a small amount of water after collecting on sunny days. Sow immediately after collection. When transportation and short-term storage are required, store in a foam box with ice packs. The storage temperature should be below 5-10℃. Seedling raising: The seedbed width is 100-120 cm, and before sowing, every 667 m² 2 After applying 2,500 kg of well-rotted sheep manure, cover the seedbed with fine mountain soil and raw yellow soil in a ratio of 1:5, with a thickness of 2-5 cm, and rake the seedbed level. Spread the treated bulbils evenly on the seedbed, cover with 1-2 cm of pine needles after sowing, and water thoroughly. During the seedling stage, micro-spray water pipes are set in the middle of the seedling bed to maintain soil moisture content of 50-80% and keep the field free of weeds. During the seedling stage, the leaves are sprayed twice with biological agents containing Bacillus subtilis, Trichoderma and other biological agents. Transplanting: Transplant in January or February of the year following seedling cultivation; Before transplanting, mix rhizomes cultivated from bulbils with 0.5-1.0% wood ash; Before transplanting, thoroughly water the seedbed and plant 1-2 days later, or after rain; When transplanting, remove 2-4cm of the topsoil from the seedbed, then place the rhizomes of *Dracaena cochinchinensis*, with a spacing of 7-12cm between plants and rows, cover with 2-4cm of soil, and then cover with a 1-2cm layer of pine needles. The seedling quantity is 60,000 plants per acre. Water thoroughly after transplanting. Post-transplanting management includes water management, thinning, weeding, fertilization, and pest and disease control. Water management includes maintaining soil moisture at 40-80% during the planting period; ensuring good drainage in the forest during summer; covering the seedbed with 1-2cm of hillside soil or farmyard manure in winter; and timely hilling or watering during severe drought. Thinning includes removing overly dense, diseased, and weak seedlings while weeding after emergence; maintaining a plant spacing of approximately 6-12cm for direct seeding. Fertilization includes spraying organic water-soluble fertilizer according to growth conditions; covering with hillside soil or farmyard manure in winter; and incorporating the fertilizer into the soil during summer weeding. The pest and disease control measures include root rot, damping-off, and stem rot. In the early stages, apply a mixture of Bacillus subtilis and Trichoderma harzianum at a ratio of 1:30 to the soil, or drench the roots 2-3 times as directed, or spray with ethionine as directed, or drench the roots 1-2 times with ethionine. For powdery mildew and downy mildew, foliar spray with berberine. When underground pests such as grubs are found, mix a mixture of Beauveria bassiana or Metarhizium anisopliae with soil at a ratio of 1:30 or drench the roots 1-2 times. When above-ground pests such as pine caterpillars and aphids are found, foliar spray with plant extracts containing matrine and / or veratrine 1-2 times.

[0016] Harvesting: Harvest in autumn one and a half years after planting.

[0017] Example 3

[0018] This invention provides a method for cultivating *Dracaena sanderiana* under forest cover, comprising the following steps: Site selection: Select natural forest land with less weeds and sparse coniferous forest at an altitude of 3000 m, with a canopy closure of 0.3, a slope of ≤25°, a soil pH of 6.0 (slightly acidic), and an annual rainfall of 1000-1200 mm. Land preparation: In September and October, remove small shrubs and weeds from the forest floor, and scrape off 1-2 cm of topsoil with a hoe; till the forest soil 2-3 times, to a depth of 20-25 cm; after each tilling, allow the soil to dry in the sun and weather for 18 days, then remove dried weeds, tree roots, and gravel; water during the final tilling to ensure soil moisture of 40-70%, and spread 70 kg of wood ash per acre, mixing it thoroughly; after 15 days of wood ash treatment, apply more ash per 667 m². 2 Apply 1500 kg of well-rotted farmyard manure and 30 m³ of soil from the mountain base. 3 As base fertilizer, mix the soil and fertilizer evenly by rotary tillage and then prepare the bed; Collecting bulbils: From May to August, collect plump or sprouting bulbils from the lower part of the inflorescence. Collect in batches multiple times on rainy or cloudy days. Spray a small amount of water after collecting on sunny days. Sow immediately after collection. When transportation and short-term storage are required, store in a foam box with ice packs. The storage temperature should be below 5-10℃. Seedling raising: The seedbed width is 100-120 cm, and before sowing, every 667 m² 2After applying 2000 kg of well-rotted sheep manure, cover the seedbed with fine mountain soil and raw yellow soil in a ratio of 1:3, with a thickness of 2-5 cm, and rake the seedbed level. Spread the treated bulbils evenly on the seedbed, cover with 1-2 cm of pine needles after sowing, and water thoroughly. During the seedling stage, micro-spray water pipes are set in the middle of the seedling bed to maintain soil moisture content of 50-80% and keep the field free of weeds. During the seedling stage, the leaves are sprayed twice with biological agents containing Bacillus subtilis, Trichoderma and other biological agents. Transplanting: Transplant in December of the same year of seedling cultivation; before transplanting rhizomes cultivated from bulbils, mix them with 0.5-1.0% wood ash; water the seedbed thoroughly before transplanting, and plant 1-2 days later, or after rain; when transplanting, remove 2-4cm of the topsoil from the seedbed, then place the rhizomes of *Dracaena cochinchinensis*, with a plant spacing of 7-12cm, cover with 2-4cm of soil, and cover with a 1-2cm layer of pine needles. The seedling quantity is 50,000 plants per acre. Water thoroughly after transplanting. Post-transplanting management includes water management, thinning, weeding, fertilization, and pest and disease control. Water management includes maintaining soil moisture at 40-80% during the planting period; ensuring good drainage in the forest during summer; covering the seedbed with 1-2cm of hillside soil or farmyard manure in winter; and timely hilling or watering during severe drought. Thinning includes removing overly dense, diseased, and weak seedlings while weeding after emergence; maintaining a plant spacing of approximately 6-12cm for direct seeding. Fertilization includes spraying organic water-soluble fertilizer according to growth conditions; covering with hillside soil or farmyard manure in winter; and incorporating the fertilizer into the soil during summer weeding. The pest and disease control measures include root rot, damping-off, and stem rot. In the early stages, apply a mixture of Bacillus subtilis and Trichoderma harzianum at a ratio of 1:20, mixed with soil and sprinkled, or drench the roots 2-3 times as directed. Alternatively, spray with allicin as directed or drench the roots 1-2 times. For powdery mildew and downy mildew, foliar spray with berberine. When underground pests such as grubs are found, mix a mixture of Beauveria bassiana or Metarhizium anisopliae with soil at a ratio of 1:20 or drench the roots 1-2 times. When above-ground pests such as pine caterpillars and aphids are found, foliar spray with plant extracts containing matrine and / or veratrine 1-2 times.

[0019] Harvesting: Harvest in autumn one and a half years after planting.

[0020] Comparative example: In Example 3, a planting plot was selected near the site for understory cultivation of *Dracaena sanderiana*, including the following steps: Land preparation: Remove small shrubs and weeds in the forest in September and October, and till the forest soil 2-3 times to a depth of 20-25cm. After each tilling, remove dried weeds, tree roots and gravel. Water the soil during the last tilling to ensure a soil moisture of 40-70%. Spread 70 kg of wood ash per acre, mix it well and then prepare the beds. Collecting bulbils: From May to August, collect plump or sprouting bulbils from the lower part of the inflorescence. Collect in batches multiple times on rainy or cloudy days. Spray a small amount of water after collecting on sunny days. Sow immediately after collection. When transportation and short-term storage are required, store in a foam box with ice packs. The storage temperature should be below 5-10℃. Seedling raising: The seedbed should be 100-120 cm wide. Spread the treated bulbils evenly on the seedbed and water thoroughly. Transplanting: Transplant in December of the same year the seedlings were raised; water the seedbed thoroughly before transplanting, and plant 1-2 days later, or after rain; when transplanting, remove 2-4cm of the topsoil from the seedbed, and then place the rhizomes of the dragon's blood plant on top. The spacing between plants and rows should be 7-12cm. Use 50,000 seedlings per acre. Water thoroughly after transplanting. Post-transplanting management: This includes water management, thinning, weeding, fertilization, and pest and disease control. Water management involves maintaining soil moisture at 40-80% during the planting period. Thinning involves removing overly dense, diseased, and weak seedlings while weeding after emergence, maintaining a plant spacing of approximately 6-12cm for direct seeding. Fertilization includes spraying organic water-soluble fertilizer according to growth conditions. Pest and disease control includes spraying or drenching the roots with Bacillus subtilis to treat root rot, damping-off, and stem rot in their early stages. For powdery mildew and downy mildew, foliar spraying with berberine is used. When underground pests such as grubs are found, biological pesticides such as Beauveria bassiana or Metarhizium anisopliae are mixed with soil at a ratio of 1:20 or applied as a root drench 1-2 times. When above-ground pests such as pine caterpillars and aphids are found, foliar spraying with plant extracts containing matrine and / or veratrine is used 1-2 times. Harvesting: After one and a half years of planting, the rhizomes of the dragon's blood were not harvested because they were too small. Harvesting was carried out in the autumn of the third year.

[0021] The planting data statistics for Examples 1-3 and the comparative examples are shown in Table 1 below: Table 1 Planting data for Examples 1-3 and comparative examples

[0022] As shown in the table above, even when using conventional cultivation methods for understory planting of *Dracaena sanderiana* (dragon's blood), and employing biological agents or pure plant extracts that comply with the national "General Rules for Ecological Planting of Forest and Grass Medicinal Herbs," the germination rate remains very low, the growth cycle is long, the growth is slow, and the economic value is low, which is not conducive to the industrialization of *Dracaena sanderiana*. However, *Dracaena sanderiana* planted using the method of this invention not only has a high germination rate, but also maintains a transplant survival rate of over 90%. Furthermore, it can reach a yield of over one ton per acre after one and a half years, and can be harvested immediately. This greatly shortens the growth cycle of *Dracaena sanderiana*, and the plant grows well, allowing growers to obtain greater economic value and increasing their enthusiasm for planting. The method for cultivating *Dracaena cochinchinensis* under forest cover in this application complies with the national "General Rules for Ecological Planting of Forest and Grass Medicinal Herbs" throughout the entire cultivation process. No inorganic fertilizers or chemical pesticides are used, saving planting costs. Furthermore, the land rent for forest land is relatively low. By strictly controlling key cultivation links, the number of weeds in the field during the cultivation process is relatively small, which greatly saves labor time and reduces planting costs.

[0023] The above description illustrates preferred embodiments of the present invention. Contents not described herein utilize existing technology, and those skilled in the art can implement the present invention in various modifications without departing from its scope and essence. For example, a feature shown or described in one embodiment can be used in another embodiment to obtain yet another embodiment. The above are merely preferred embodiments of the present invention and do not limit the scope of the present invention. All equivalent changes made based on the content of this specification are included within the scope of the present invention.

Claims

1. A method for cultivating *Dracaena sanderiana* under forest cover, characterized in that, Includes the following steps: Site selection: Choose natural forest land with less weeds, mainly sparse coniferous forest, mixed coniferous and broad-leaved forest, and shrub forest at an altitude of 1500-3000 m, with a canopy closure of less than 0.75 and a soil pH of 5.5-7.0; Land preparation: In September and October, remove small shrubs and weeds from the forest floor and scrape off 1-2 cm of topsoil. Till the forest soil 2-3 times to a depth of 20-25 cm. After each tilling, allow the soil to dry in the sun and weather for 15-20 days, then remove dried weeds, tree roots, and gravel. Water the soil during the final tilling to maintain a moisture content of 40-70%, and apply 40-100 kg of wood ash per acre, mixing thoroughly. After 10-20 days of wood ash treatment, apply more ash per 667 m². 2 Apply 1000-2000 kg of well-rotted farmyard manure and 20-40 m³ of soil from the mountain base. 3 After the soil and fertilizer are evenly mixed by rotary tillage, the bed is prepared. Collect bulbils: From May to August, collect plump or sprouting bulbils from the lower part of the inflorescence. Collect in batches multiple times on rainy or cloudy days. Spray a small amount of water after collecting on sunny days and sow immediately after collection. Seedling raising: The seedbed width is 100-120 cm, and before sowing, every 667 m² 2 After applying 1500-2500 kg of well-rotted sheep manure, cover the seedbed with fine mountain soil and raw loess, and rake the surface level. The ratio of fine mountain soil to raw loess is 1:1-5, and the thickness is 2-5 cm. Spread the treated bulbils evenly on the seedbed, cover with 1-2 cm of pine needles after sowing, and water thoroughly. During the seedling stage, maintain soil moisture content at 50-80%, ensure the field is free of weeds, and spray the leaves with a biological agent containing Bacillus subtilis and Trichoderma 1-2 times during the seedling stage; Transplanting: Transplant in November-December of the seedling year or January-February of the following year; mix rhizomes cultivated from bulbils with 0.5-1.0% wood ash before transplanting; water the seedbed thoroughly before transplanting, and plant 1-2 days later, or after rain; when transplanting, remove 2-4cm of the topsoil from the seedbed, then place the rhizomes of *Dracaena cochinchinensis*, with a spacing of 7-12cm between plants and rows, cover with 2-4cm of soil, and then cover with a 1-2cm layer of pine needles. Water thoroughly after transplanting. Post-transplanting management: Post-transplanting management includes water management, thinning, weeding, fertilization, and pest and disease control; Harvesting: Harvest in autumn one and a half years after planting.

2. The method for cultivating *Dracaena sanderiana* under forest cover according to claim 1, characterized in that, The water management includes maintaining soil moisture content at 40-80% during the planting period; ensuring good drainage in the forest during summer; covering the raised beds with 1-2cm of hillside soil or farmyard manure in winter; and promptly mounding soil or watering when drought is severe.

3. The method for cultivating *Dracaena cochinchinensis* under forest cover according to claim 1, characterized in that, Thinning includes removing overly dense, diseased, and weak seedlings while weeding after emergence, and maintaining a plant spacing of about 6-12cm for direct seeding.

4. The method for cultivating *Dracaena sanderiana* under forest cover according to claim 1, characterized in that, The fertilization includes spraying organic water-soluble fertilizer according to the growth conditions; and turning over the base soil or farmyard manure used for winter covering into the soil in summer in conjunction with weeding.

5. The method for cultivating *Dracaena sanderiana* under forest cover according to claim 1, characterized in that, The pest and disease control measures include, at the initial stage of root rot, damping-off, and stem rot, applying Bacillus subtilis and Trichoderma harzianum mixed with soil at a ratio of 1:10-30 or drenching the roots 2-3 times as directed, or spraying or drenching the roots with allicin 1-2 times; when powdery mildew and downy mildew occur, foliar spraying with berberine is used for control; when underground pests are found, applying biological pesticides containing Beauveria bassiana or Metarhizium anisopliae mixed with soil at a ratio of 1:10-30 or drenching the roots 1-2 times; when above-ground pests such as pine caterpillars and aphids are found, foliar spraying with plant extracts containing matrine and / or veratrine is used for control 1-2 times.

Images