Facility cultivation method for improving yield and fragrance of pandanus amarus

Abstract

The invention provides a facility cultivation method for improving yield and fragrance of pandanus amarus. The facility cultivation method comprises the following steps: selecting an area of which the annual average temperature is higher than 20 DEG C, the lowest temperature is higher than 0 DEG C and the time is continuously lower than 10 DEG C for less than 10 days as a planting area; selecting a land parcel which is deep in soil layer, loose in structure, rich in organic matters and good in water retention and irrigation and drainage conditions in the planting area as a planting land; building a shading facility by adopting a steel frame structure or a cement column; selecting pandan seedlings of 10-20 cm as seedlings, and performing field planting; water and fertilizer management, plant management, pest and disease management, overwintering management and leaf quality management are carried out in the planting period; when the seedlings grow to a harvesting period, cutting off external leaves, only retaining 5-7 internal leaves, and performing harvesting management in different months of each year. According to the method, the planting area of the pandanus crispus is expanded, and the problems that traditional pandanus crispus planting depends on under-forest intercropping, and shading is unstable are solved through the facility cultivation method.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural planting, in particular to a facility cultivation method for improving the yield and aroma of Pandanus odoratus. Background Art

[0002] Pandanus amaryllifolius Roxb. is a specialty tropical spice crop rich in rice aroma, offering long-term benefits from a single planting. Its leaves are rich in active ingredients such as 2-acetyl-1-pyrroline, squalene, linoleic acid, estragole, and sterols. In recent years, the Pandanus cultivation and processing industry has been plagued by inefficient planting and management practices. The yield, color, and aroma of the leaves currently produced have been unstable, hindering the development of Pandanus processing and related products, and restricting the production and sales of both fresh leaves and processed products. There is an urgent need to develop a high-yield, aroma-stable cultivation method to ensure the healthy development of the Pandanus industry. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a facility cultivation method for improving the yield and aroma of Pandanus odoratus, so as to improve the planting and management level of Pandanus odoratus, improve the yield and quality of Pandanus odoratus leaves, thereby promoting the healthy development of the Pandanus odoratus industry and increasing farmers' income.

[0004] To achieve the above object, the present invention proposes a facility cultivation method for improving the yield and aroma of Pandanus odoratus, which is characterized by comprising the following steps:

[0005] Step 1: Select an area with an annual average temperature above 20℃, a minimum temperature above 0℃, and a continuous temperature below 10℃ for less than 10 days as the planting area;

[0006] Step 2: Select a plot of land in the planting area that has a deep soil layer, loose structure, rich organic matter, good water retention and good drainage and irrigation conditions as the planting site;

[0007] Step 3: Use steel frame structures or concrete columns to build shade facilities;

[0008] Step 4: Select 10-20cm pandan seedlings as seedlings and plant them;

[0009] Step 5: Carry out water and fertilizer management, plant management, pest and disease management, wintering management, and leaf quality management during the planting period;

[0010] Step 6: When the seedlings grow to the harvest period, cut off the outer leaves and only keep the inner 5-7 leaves, and harvest and manage them in different months of each year.

[0011] Furthermore, in step 2, before planting, 500-1000 kg / mu of organic fertilizer, 15-30 kg / mu of compound fertilizer, and 10 kg / mu of potassium fertilizer are applied to the planting land, the land is plowed at a depth of 30-40 cm, ridges are formed at a depth of 40-60 cm, and irrigation facilities are laid according to the ridge spacing.

[0012] Furthermore, in step three, the height of the shading facility is 2.0m to 2.5m, and the light transmittance of the laid shading net is 30% to 50%, preferably 30%.

[0013] Furthermore, in step 4, the time when the average temperature is above 20°C is selected for planting, and the seedlings are planted on the ridges with a spacing of 40 to 60 cm.

[0014] Furthermore, in step five, the water and fertilizer management includes: maintaining the humidity of the plot at 50% to 60%, timely replenishing water and draining water according to climatic conditions, and applying topdressing 2 to 3 times a year after entering the harvest period.

[0015] Furthermore, in step five, the plant management includes: retaining 3 to 4 parallel tiller buds when the seedlings begin to tiller, and regularly removing excess tiller buds; when the harvested plant height is higher than 1 m, retaining 3 to 4 parallel tiller buds at the bottom of the plant; when the tiller bud height exceeds 1.5 m, cutting off the tiller buds, disinfecting the wounds, and then harvesting the tiller buds retained at the bottom.

[0016] Furthermore, in step five, the wintering management includes: when the temperature is below 10°C, timely replenishing water to the planting site to keep the field moist, and promptly clearing frozen plants and replanting them after the temperature rises next year.

[0017] Furthermore, in step five, the leaf quality management includes: regularly spraying 0.1-0.5 g / L proline solution on the leaf surface during hot or rainy seasons.

[0018] Furthermore, in step six, the harvesting management includes: harvesting once every 40 to 60 days from April to November, harvesting appropriately according to climatic conditions from December to March, and cleaning the old leaves on the outside of the plant when the temperature rises at the end of February, leaving only 5 to 7 leaves on the inside, and harvesting 4 to 7 times a year.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention expands the planting area of Pandanus odoratus, utilizes the facility cultivation method to solve the problem that traditional Pandanus odoratus planting relies on intercropping under the forest and shading is unstable, by building measures such as shading facilities, it is possible to artificially create environmental conditions suitable for the growth of Pandanus odoratus, so that Pandanus odoratus can be planted in more areas, no longer limited to a specific natural forest environment, by supporting corresponding management measures, Pandanus odoratus leaves with thicker flesh, higher aroma concentration and greener leaf color can be obtained, especially in seasons with high temperature or more rainfall, by measures such as foliar spraying of proline solution, further promoting the synthesis and accumulation of aroma components, effectively stabilizing the aroma components of Pandanus odoratus leaves, making the aroma of Pandanus odoratus leaves more rich and lasting, providing strong guarantee for the quality of Pandanus odoratus processed products. Using the method described in the present invention, after entering the peak production period, the per mu yield reaches more than 2200 kg, and the per mu planting benefit reaches 18,000 yuan, which can effectively improve the yield and benefit of Pandanus odoratus. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiment below. The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. In the accompanying drawings:

[0022] Figure 1 Schematic diagram of the overall process of the method of the present invention;

[0023] Figure 2 The figure shows the changes in average leaf weight per plant at different tillering buds and harvesting periods in the embodiment of the present invention;

[0024] Figure 3 The weight of leaves per plant changes with harvesting time in the embodiment of the present invention;

[0025] Figure 4 The graph shows the change of 2AP content with leaf growth time in the examples of the present invention. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0027] This embodiment proposes a facility cultivation method for improving the yield and aroma of Pandanus odoratus. Figure 1 Shown, including:

[0028] Step 1: Select the planting area. The area with an annual average temperature above 20℃, a minimum temperature above 0℃ and a continuous temperature below 10℃ for less than 10 days should be selected as the planting area.

[0029] Step 2: Site selection and land preparation: A plot with deep soil, loose structure, rich organic matter and good water retention should be selected as the planting site. The planting site should have good irrigation and drainage conditions. Before planting, apply 500-1000kg / mu of organic fertilizer, 15-30kg / mu of compound fertilizer, and 10kg / mu of potassium fertilizer to the land. Plow the land at a depth of 30-40cm, make ridges at 40-60cm, and lay irrigation facilities according to the ridge spacing.

[0030] Step 3: Shade Facilities: Use steel frame structures or concrete columns to build shade facilities. The facility height should be 2.0m to 2.5m. The shade netting should have a light transmittance of 30% to 50%. DN50 hot-dip galvanized steel pipes are recommended for columns and DN25 hot-dip galvanized steel pipes for beams.

[0031] Step 4: Seedling selection and transplanting: Select 10-20cm strong, uniform and neat pandan seedlings as seedlings, and transplant them on ridges at a spacing of 40-60cm. The average temperature should be above 20 degrees during transplanting.

[0032] Step 5: Field management: including water and fertilizer management, plant management, pest and disease management, wintering management, and leaf quality management.

[0033] For water and fertilizer management, keep the humidity of the land at 50% to 60%, add water and drain water in time according to climatic conditions, apply fertilizer 2 to 3 times a year after the harvest period, use 200 to 300 kg of organic fertilizer and 15 to 20 kg of urea each time, apply it next to the roots of each plant, spread it after rain or irrigate after spreading it. Pay attention to the loss of fertilizer and green color of the plants after entering the rainy season.

[0034] For pest and disease management, avoid planting crops or plants that easily attract moth larvae such as armyworms, fall armyworms, and cabbage loopers in areas near Pandanus odoratus planting areas, and promptly prevent and control diseases such as stem rot and leaf spot.

[0035] Plant management: retain 3-4 parallel tiller buds when the seedlings begin to tiller, and remove the excess tiller buds regularly; when the harvested plant height is higher than 1m, retain 3-4 parallel tiller buds at the bottom of the plant; when the tiller bud height exceeds 1.5m, cut off the tiller buds, disinfect the wounds, and replace them with the tiller buds retained at the bottom for harvesting.

[0036] For winter management, when the temperature is below 10 degrees, water the land in time to keep it moist. When the temperature rises next year, clean up the frozen plants and replant them in time.

[0037] Leaf quality management: In seasons with high temperature or heavy rainfall, regularly spray 0.1-0.5g / L proline solution on the leaves to increase the aroma of the leaves.

[0038] Step 6: Harvest Management: When the seedlings reach harvest time, remove the outer leaves, leaving only the inner 5-7 leaves. Harvest every 40-60 days from April to November, with regular harvesting every 40 days recommended. From December to March, harvest appropriately based on weather conditions. When the temperature rises at the end of February, remove the old outer leaves of the plant, leaving only the inner 5-7 leaves. Harvest 4-7 times per year.

[0039] As a preferred embodiment, in step 1, the lowest temperature screening for Pandanus odoratus planting is performed by setting different temperature treatment groups, specifically including:

[0040] Using 20°C as a control, three temperature treatments (10°C, 4°C, and 0°C) were set up for a temperature simulation experiment on Pandanus odoratus potted plants. Three days after the start of the temperature simulation experiment, plants in the 0°C treatment showed significant wilting. After 10 days, plants in the 4°C treatment showed partial wilting, and after 15 days, plants in the 10°C treatment showed complete wilting. After 15 days in the 10°C treatment, the leaves of plants in the pots turned yellow, with occasional leaf edges drying up. After returning to 20°C, plants in the 4°C and 0°C treatments did not recover after 15 days. Plants in the 4°C and 0°C treatments recovered 90% after 10 days, recovered completely after 10°C, and did not recover at all after 0°C. The results indicate that continuous low temperatures below 10°C for more than 10 days can irreversibly affect the growth of Pandanus odoratus.

[0041] Further field planting trials were conducted in Yangjiang, Zhanjiang, and Maoming in Guangdong Province, and Zhangzhou in Fujian Province, where the average annual temperature is above 20°C and the minimum winter temperature is above 0°C but below 10°C. As shown in Table 1 (Winter Minimum Temperature and Survival Rate Statistics for Different Planting Areas), the survival rate of Pandanus odoratus in these four areas exceeded 99% for three consecutive winters from 2022 to 2025. The results of the Zhangzhou survey indicate that intermittent low temperature stress does not cause irreversible damage to Pandanus odoratus. Based on these experiments, it is clear that areas for Pandanus odoratus cultivation should be selected with an average annual temperature of 20°C, a minimum temperature above 0°C, and a duration of less than 10 consecutive days below 10°C to ensure normal wintering.

[0042] Table 1

[0043]

[0044] As a preferred embodiment, during the construction of the shade facility in step 3, the optimal light transmittance of the shade shed is selected by setting control groups with different light transmittances:

[0045] A potted experiment with Pandanus odoratus was conducted with four light transmittance treatments: 10%, 30%, 50%, 70%, and 90%. Shade nets were placed at a height of 2 meters for each transmittance, and the plants were protected from sunlight using the corresponding shade nets. Water and fertilizer management was maintained identically. After three months of growth, the outer leaves were removed, leaving only the five inner leaves. After two months of growth, the chlorophyll content, leaf weight per plant, and aroma content of the leaves were measured. The results are shown in Table 2 (Leaf Yield and Weight Under Different Shade Treatments). Statistical results indicate that plants with a transmittance between 30% and 50% exhibited higher yields, better leaf color, and higher aroma concentrations.

[0046] Table 2

[0047]

[0048]

[0049] As a preferred embodiment, during the planting management process of step 5, a control group is set up for plants with different numbers of tiller buds retained, and the optimal number of tiller buds retained on the plants is screened, specifically including:

[0050] In the field, treatments of 1, 2, 3, 4, 5, 6 and 7 tillering bud Pandanus plants were set up respectively, with a light transmittance of 30%. After the plants had grown for one year and entered the peak period of leaf harvesting, six indicators including average single plant leaf weight, average single bud leaf weight, average leaf weight, average number of leaves, average leaf length and average leaf width were measured at 30 days, 40 days and 60 days respectively. The results are shown in Table 3 (Statistics and comparison of various indicators of different tiller buds harvested at 30 days), Table 4 (Statistics and comparison of various indicators of different tiller buds harvested at 40 days), and Table 5 (Statistics and comparison of various indicators of different tiller buds harvested at 60 days). The results show that when harvested at 30 days, 3 buds performed well in 5 of the 6 indicators, and 4 buds performed well in 4 indicators. Among them, 4 buds performed better than 3 buds in average leaf weight per plant. When harvested at 40 days, 3 buds performed well in all 6 indicators, followed by 4 buds and 2 buds, which performed well in 5 indicators. However, 2 buds performed weaker than 4 buds in average leaf weight per plant. When harvested at 40 days, 3 buds and 4 buds performed well in all 5 of the 6 indicators. According to statistical results, under the conditions of ensuring yield (average leaf weight per plant) and taking into account leaf quality (leaf weight, number of leaves, etc.), retaining 3 to 4 tiller buds on the plant will help to obtain high-yield and high-quality Pandanus leaves.

[0051] Table 3

[0052]

[0053]

[0054] Table 4

[0055]

[0056] Table 5

[0057]

[0058] As a preferred embodiment, in step six, different harvesting periods are set for different tiller buds and the leaf mass is counted to determine the optimal harvesting time, which specifically includes:

[0059] By analyzing the average leaf weight per plant at different harvesting times of different tillering buds, it was found that as the harvesting time increased, the weight of the harvested leaves also increased, e.g. Figure 2-3 As shown, when the number of tiller buds exceeded 5, the weight of leaves per plant at 40 days and 60 days was not significantly different, while the average weight of leaves per plant increased most significantly when the number of tiller buds was 3 and 4, increasing by 64.07%, 38.52% and 66.99%, 26.92% respectively. Further harvesting was carried out in the field according to plots, and the weight of leaves per plant at 30 days, 40 days and 60 days was significantly different. The average weight of leaves per plant harvested at 40 days and 60 days increased by 66.73% and 101.25% compared with that at 30 days, and the average weight of leaves per plant harvested at 60 days increased by 20.71% compared with that at 40 days. Figure 4 Further analysis of the changes in 2-AP, a characteristic aroma substance in the leaves, revealed that 2-AP concentrations decreased with increasing harvest time. Using a threshold of 10 μg / g, the leaf growth period should not exceed 64 days. Further measurements of leaf chlorophyll revealed a significant decrease in chlorophyll content after 60 days (the 24th leaf). Based on these analyses, the leaf harvest period should be between 40 and 60 days after the previous harvest.

[0060] As a preferred embodiment, in step 5, different concentrations of proline solutions are set and the 2AP content of leaves is statistically analyzed to determine the optimal proline solution concentration, which specifically includes:

[0061] Using water as the control, proline concentrations of 0.1 g / L, 0.3 g / L, 0.5 g / L, and 0.7 g / L were set. Potted plants with consistent growth were selected, the outer leaves of the plants were cut off, and only the inner 5 leaves were retained. After spraying with water and proline solution, the 2AP content of the leaves was measured after 60 days of growth. The results are shown in Table 6. The 2AP content of the leaves of Pandanus odoratus sprayed with proline solution was significantly higher than that of the control sprayed with water. Proline solutions of 0.1 g / L to 0.5 g / L can effectively improve the aroma of the leaves, among which 0.3 g / L has the best effect.

[0062] Table 6

[0063]

[0064] As a preferred embodiment, three cultivation methods, namely open air cultivation, rubber forest intercropping cultivation and facility cultivation, were set up for production comparison tests.

[0065] Open-air cultivation involves the following steps: 1) selecting a planting area; 2) selecting and preparing the land; 3) selecting and planting seedlings; 4) field management; and 5) harvest management. Specifically, for 1) selecting a planting area, choose an area with an average annual temperature above 20°C, a minimum temperature above 0°C, and a minimum temperature below 10°C for fewer than 10 consecutive days. 2) A plot with deep soil, loose structure, rich organic matter and good water retention should be selected as the planting site, and the planting site should have good irrigation and drainage conditions; before planting, apply 1000kg / mu of organic fertilizer, 30kg / mu of compound fertilizer, and 10kg / mu of potassium fertilizer to the land, plow according to a depth of 40cm, make ridges according to 50cm, and lay irrigation facilities according to the ridge spacing; 3) Seedling selection and transplanting: Select 20cm strong and uniform pandan seedlings as seedlings, transplant them on the ridges with a spacing of 50cm, and plant 2600 plants per mu. The average temperature should be above 20 degrees when transplanting; 4) Field management: Keep the humidity of the plot at 50% to 60%, replenish water and drain water in time according to climatic conditions, and apply fertilizer three times a year after entering the harvest period, using 200kg of organic fertilizer and 15kg of urea each time, and apply it next to the root system of each plant. Sprinkle fertilizer after rain or irrigate after spreading fertilizer. Pay attention to plant defertilization and loss of green after entering the rainy season. Regarding pest and disease management, avoid planting crops or plants that attract moth larvae such as armyworms, fall armyworms, and cabbage worms near Pandanus odoratus planting areas. Control diseases such as stem rot and leaf spot promptly. Regarding winter management, when the temperature drops below 10°C, water the fields promptly to keep them moist. When temperatures rise the following year, remove any frozen plants and replant them promptly. 5) Harvesting Management: When seedlings reach harvest time, remove the outer leaves, retaining only the inner 5-7 leaves. Harvest every 45 days from April to November, for a total of five harvests.

[0066] Intercropping in rubber forests includes the following steps: 1) Planting area selection; 2) Site selection and preparation; 3) Seedling selection and planting; 4) Field management; and 5) Harvest management. Specifically, 1) Planting area selection is the same as for open-pit cultivation; 2) Rubber forests with a light transmittance of 50% should be selected, with a deep, loose soil layer rich in organic matter and good water retention. The plantation should have a row spacing of 2 meters, narrow rows of 4 meters, and wide rows of 18 meters. The plantation should have good drainage and irrigation conditions. Before planting, apply 1,000 kg / mu of organic fertilizer, 30 kg / mu of compound fertilizer, and 10 kg / mu of potash fertilizer. The land should be plowed to a depth of 40 cm, ridges should be formed at 50 cm, and irrigation facilities should be installed according to the ridge spacing. Seedling selection and planting, field management, and harvest management are the same as for open-pit cultivation. Up to 1,200 rubber plants can be planted per mu of rubber forest.

[0067] Facility cultivation includes the following steps: 1) selecting the planting area; 2) selecting and preparing the land; 3) constructing shade facilities; 4) selecting and planting seedlings; 5) field management; and 6) harvesting management. 1) Selecting the planting area and 2) selecting and preparing the land are the same as for open-air cultivation. 3) Constructing shade facilities uses DN50 hot-dip galvanized steel pipes as uprights, each 2.0m high, and DN25 hot-dip galvanized steel pipes as crossbeams. A shade net with a 50% light transmittance is used. Field management requires careful plant management. When seedlings begin to tiller, retain 3-4 parallel tiller buds, and remove excess tiller buds regularly. When the plant height at harvest exceeds 1m, retain 3-4 parallel tiller buds at the base of the plant. When the tiller buds exceed 1.5m in height, cut off the tiller buds, disinfect the wounds, and then replace them with the remaining tiller buds at the base for harvesting. Seedling selection and planting, other aspects of field management, and harvest management are the same as for open-air cultivation.

[0068] In the second year of pandan leaf cultivation, during the peak production period from April to November, pandan leaves were collected for yield measurement. Leaf length, width, weight, chlorophyll content, 2AP content, and yield per plant were measured. The results are shown in Table 7. Using facility cultivation methods, the harvested leaves have better quality, yield, and efficiency.

[0069] Table 7

[0070]

[0071] (Note: Based on the leaf quality, open-air cultivation is calculated at 3 yuan / kg, intercropping in rubber forests is calculated at 6 yuan / kg, and facility cultivation is calculated at 8 yuan / kg)

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A facility cultivation method for improving the yield and aroma of Pandanus odoratus, characterized in that: The following steps are involved: Step 1: Select an area with an annual average temperature above 20℃, a minimum temperature above 0℃, and a continuous temperature below 10℃ for less than 10 days as the planting area; Step 2: Select a plot of land in the planting area that has a deep soil layer, loose structure, rich organic matter, good water retention and good drainage and irrigation conditions as the planting site; Step 3: Use steel frame structures or concrete columns to build shade facilities; Step 4: Select 10-20cm pandan seedlings as seedlings and plant them; Step 5: Carry out water and fertilizer management, plant management, pest and disease management, wintering management, and leaf quality management during the planting period; Step 6: When the seedlings grow to the harvest period, cut off the outer leaves and only keep the inner 5-7 leaves, and harvest and manage them in different months of each year.

2. The facility cultivation method for improving Pandanus officinalis yield and aroma according to claim 1, wherein: In step 2, before planting, apply 500-1000 kg / mu of organic fertilizer, 15-30 kg / mu of compound fertilizer, and 10 kg / mu of potassium fertilizer to the planting land, plow the land at a depth of 30-40 cm, form ridges at a depth of 40-60 cm, and lay irrigation facilities according to the ridge spacing.

3. The facility cultivation method for improving Pandanus officinalis yield and aroma according to claim 1, characterized in that, In step three, the height of the shading facility is 2.0m to 2.5m, and the light transmittance of the laid shading net is 30% to 50%, preferably 30%.

4. The facility cultivation method for improving the yield and aroma of Pandanus odoratus according to claim 1, wherein: In step 4, choose a time when the average temperature is above 20°C for planting, and plant the seedlings on the ridges with a spacing of 40 to 60 cm.

5. The facility cultivation method for improving the yield and aroma of Pandanus odoratus according to claim 1, characterized in that: In step five, the water and fertilizer management includes: maintaining the humidity of the plot at 50% to 60%, timely watering and drainage according to climatic conditions, and applying fertilizer 2 to 3 times a year after entering the harvest period.

6. The facility cultivation method for improving the yield and aroma of Pandanus odoratus according to claim 1, characterized in that: In step five, the plant management includes: retaining 3 to 4 parallel tiller buds when the seedlings begin to tiller, and regularly removing excess tiller buds; when the harvested plant height is higher than 1 meter, leaving 3 to 4 parallel tiller buds at the bottom of the plant; when the tiller bud height exceeds 1.5 meters, cutting off the tiller buds, disinfecting the wounds, and replacing them with the tiller buds retained at the bottom for harvesting.

7. The facility cultivation method for improving the yield and aroma of Pandanus odoratus according to claim 1, characterized in that: In step five, the wintering management includes: when the temperature is below 10°C, timely replenishing water to the planting site to keep the field moist; when the temperature rises next year, timely clearing frozen plants and replanting in time.

8. The facility cultivation method for improving the yield and aroma of Pandanus odoratus according to claim 1, characterized in that: In step five, the leaf quality management includes: regularly spraying 0.1-0.5 g / L proline solution on the leaf surface during hot or rainy seasons.

9. The facility cultivation method for improving the yield and aroma of Pandanus odoratus according to claim 1, characterized in that: In step six, the harvesting management includes: harvesting once every 40 to 60 days from April to November, harvesting appropriately according to the climate conditions from December to March, and cleaning the old leaves on the outside of the plant when the temperature rises at the end of February, leaving only 5 to 7 leaves on the inside, and harvesting 4 to 7 times a year.

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