High-yield and high-efficiency cultivation method of asparagus spear tea

Abstract

The application provides a high-yield and high-efficiency cultivation method of asparagus spear tea. The application adopts wide-distance double-row Z-shaped planting, and the number of plants for harvesting the spear is increased by about 56.25% and the dry weight yield is increased by 34.48% compared with the conventional green asparagus cultivation method. In addition, the tender stems are left at the same time, and the harvesting is carried out at the same time, one batch is harvested, and after the garden is cleaned, the tender stems are left again, at least 5 batches of asparagus tea can be harvested in one year, and the yield is high. The asparagus spear harvested by the application has excellent quality, has beautiful sensory quality and higher nutritional quality, and the beneficial ingredients such as nutritional ingredients such as fructofuranose, timosaponin, chonglou saponin and glycyl-leucine are increased by more than 2 times compared with ordinary spear tea without flower buds. Therefore, the method of the application has wide application prospects in the fields of improving the yield and quality of asparagus spear tea.

Description

Technical Field

[0001] This invention belongs to the field of biological breeding technology research, specifically involving a high-yield and high-efficiency cultivation method for asparagus tender shoot tea. Background Technology

[0002] asparagus( Asparagus officinalis Asparagus (L.) is a herbaceous plant belonging to the genus Asparagus in the family Asparagaceae. It is a health-promoting vegetable containing bioactive components such as steroidal saponins and flavonoids, and is rich in free amino acids, vitamins, trace elements (selenium, zinc, iron), as well as protein, sugar, and other nutrients. Asparagus has physiological effects such as anti-fatigue, anti-tumor, anti-aging, and immune-enhancing properties. High-quality asparagus tea is a tea substitute beverage made from the tender tips of fresh asparagus using green tea processing techniques. Asparagus tea is a new type of health-promoting tea substitute beverage developed in China in recent years, combining the medicinal value of asparagus with its nutritional value. With the increasing awareness of health, asparagus tea has developed rapidly, and its market development prospects are broad. However, current research on asparagus tea mainly focuses on the preparation process; there are no reports on high-yield and high-efficiency cultivation techniques for asparagus tender tip tea. The existing cultivation techniques for asparagus tea have the following problems:

[0003] (1) There are currently no reports on asparagus tea cultivation techniques.

[0004] (2) The tender stems harvested by the common green asparagus cultivation method are generally about 30 cm long, with few stem tips and low yield.

[0005] (3) The tender stems harvested using the common green asparagus cultivation method are generally more than 10 mm thick and require slicing and other processing, which is not only labor-intensive but also results in a less attractive appearance than the tender tips.

[0006] (4) In the common green asparagus cultivation method, the planting is usually done in a narrow row with low density, resulting in low asparagus tea yield. Summary of the Invention

[0007] To address the main problems currently existing, this invention provides a high-yield and high-efficiency cultivation method for asparagus shoot tea. Specifically, this invention includes the following:

[0008] In a first aspect, the present invention provides a high-yield and high-efficiency cultivation method for asparagus shoot tea, wherein the method includes:

[0009] (I) Asparagus seedlings are planted in a wide-spaced double-row Z-shaped pattern, and asparagus is not harvested in the year of planting;

[0010] (II) In the year following the planting, after the tender shoots of asparagus sprout, leave 5-6 shoots per cluster. After all the lateral branches have spread out, harvest the first batch of tender shoots at once. After harvesting the tender shoots, cut them off 50-60 cm above the ground and remove the above-ground parts of the stems and all lateral branches.

[0011] (III) After harvesting the second batch of tender asparagus tips according to the steps of (II), remove the above-ground stems. After the asparagus sprouts, leave tender stems in each clump as mother stems. Keep the mother stems until the middle of the year, leave stubble and remove the above-ground stems.

[0012] (IV) After the new tender stems sprout and the lateral branches have fully expanded, the third batch of asparagus tender tips is harvested at once. At the same time, the tender tips that sprout from the stubble are also harvested. After harvesting, the above-ground parts of the stems are removed. After the new tender stems sprout, each cluster of tender stems is left as the mother stem. The mother stems are left to grow until the end of the year, and the above-ground parts of the stems are removed.

[0013] (V) In the third year after planting, after harvesting the fourth batch of asparagus tips according to the steps in (II), remove the above-ground stems. In mid-May, after the new tender stems sprout, leave them as mother stems. Leave the mother stems until autumn, leave the stubble and remove the above-ground stems. After the new tender stems sprout and the lateral branches have fully unfolded, harvest the fifth batch of asparagus tips at once. At the same time, harvest the tender tips that sprout from the stubble. After harvesting, remove all the above-ground parts.

[0014] In some embodiments, the high-yield and high-efficiency cultivation method for asparagus shoot tea according to the present invention further includes:

[0015] (VI) After the new tender stems sprout, each cluster of tender stems is used as the mother stem. The mother stems are kept until the end of the year. After the above-ground stems wither and turn yellow, the above-ground parts are removed, and organic fertilizer, urea and compound fertilizer are applied.

[0016] In some embodiments, according to the high-yield and high-efficiency cultivation method of asparagus tender tea according to the present invention, in step (I), the planting row spacing is 20-200 cm and the plant spacing is 10-30 cm, preferably the planting row spacing is 180-250 cm and the plant spacing is 20-30 cm.

[0017] In some embodiments, according to the high-yield and high-efficiency cultivation method for asparagus shoot tea according to the present invention, steps (II)-(V) further include the steps of applying organic fertilizer, urea and compound fertilizer.

[0018] In some embodiments, according to the high-yield and high-efficiency cultivation method of asparagus tender shoot tea according to the present invention, in step (II), in the year following planting, after the asparagus tender shoots sprout, leave 5-6 shoots per clump. After all the lateral branches have unfolded, harvest the tender shoots all at once. After the tender shoots are harvested, cut off the above-ground part of the stem and all lateral branches 50-60 cm above the ground.

[0019] In some embodiments, according to the high-yield and high-efficiency cultivation method of asparagus tender tips tea according to the present invention, in step (III), after harvesting the second batch of asparagus tender tips, the above-ground stems are removed. After the asparagus sprouts, 3-4 tender stems are left in each clump as mother stems. The mother stems are left to grow until mid-August, and the above-ground stems are removed after leaving a stubble of 20-30 cm.

[0020] In some embodiments, according to the high-yield and high-efficiency cultivation method of asparagus tender shoot tea according to the present invention, in step (IV), after the new tender shoots sprout, and after 6-8 days when all the lateral branches have unfolded, the third batch of asparagus tender shoots is harvested at once, and the tender shoots that sprout from the stubble are also harvested at the same time. After harvesting, the above-ground parts of the stems are removed. After the new tender shoots sprout, 5-6 tender shoots are left in each clump as mother stems. The mother stems are kept until December, and the above-ground parts of the stems are removed.

[0021] In some embodiments, according to the high-yield and high-efficiency cultivation method of asparagus tender tips tea according to the present invention, in step (V), after harvesting the fourth batch of asparagus tender tips in the third year and thereafter according to method (II), the above-ground stems are removed. In early May, after the new tender stems sprout, 3-4 tender stems are left as mother stems in each clump. The mother stems are left to grow until late August. The above-ground stems are removed after leaving a stubble of 20-30 cm. Organic fertilizer, urea and compound fertilizer are applied. When the new tender stems sprout and the lateral branches have fully expanded, the fifth batch of asparagus tender tips is harvested at one time. At the same time, the tender tips that sprout from the stubble are harvested. After harvesting, all the above-ground parts are removed.

[0022] In some embodiments, according to the high-yield and high-efficiency cultivation method of asparagus tender shoot tea according to the present invention, in step (VI), in early September, after the new tender shoots sprout, 5-6 tender shoots are left in each clump as mother stems. The mother stems are left to grow until December. After the above-ground stems wither and turn yellow, the above-ground parts are removed, and organic fertilizer, urea and compound fertilizer are applied.

[0023] A second aspect of the present invention provides the application of the method described in the first aspect in improving the yield, appearance value and nutritional content of asparagus tea.

[0024] The technical effects of this invention include, but are not limited to:

[0025] (1) This invention adopts a method of simultaneously retaining tender stems and harvesting them at the same time. After harvesting one batch, the garden is cleaned up, and then tender stems are retained again. At least 5 batches of asparagus tea can be harvested in one year, resulting in high yield. This invention fills the gap in high-efficiency cultivation technology for asparagus tea and is completely different from conventional green asparagus cultivation methods.

[0026] (2) The asparagus tips harvested by this invention have a diameter of about 1-3 mm, are of excellent quality, and have a beautiful appearance. They do not need to be sliced ​​when making asparagus tea. The asparagus tips harvested by conventional green asparagus cultivation methods have a diameter of 10 mm or more, which requires slicing, resulting in an unattractive appearance and wasting labor.

[0027] (3) The present invention harvests tender asparagus tips with flower buds, which have higher nutritional content, including more than 2 times the amount of beneficial components such as sucrose pentose, anemarrhena saponin, Paris saponin, glycine-leucine.

[0028] (4) The present invention adopts a wide-row double-row Z-shaped planting method, which increases the number of plants harvested for tender tips by about 56.25% compared with conventional green asparagus cultivation methods, and increases the dry weight yield by 34.48%. Attached Figure Description

[0029] Figure 1 The images show the morphology of asparagus stems and tips. A represents asparagus stems, and B represents asparagus tips with buds.

[0030] Figure 2 To illustrate the difference in plant morphology between asparagus tender stems and asparagus lateral branches, A represents asparagus tender stems, and B represents asparagus plants after lateral branches have developed.

[0031] Figure 3 The image shows the lateral shoot sprouting of asparagus at different stubble heights in spring. A represents asparagus with a stubble height of 20 cm, B represents asparagus with a stubble height of 50 cm, and C represents asparagus with a stubble height of 90 cm.

[0032] Figure 4 The image shows the lateral shoot sprouting of asparagus at different stubble heights in autumn. A represents asparagus with a stubble height of 20 cm, B represents asparagus with a stubble height of 50 cm, and C represents asparagus with a stubble height of 90 cm.

[0033] Figure 5 To illustrate the growth of asparagus at different planting densities, A represents 4 boxes of asparagus planted in a 6-meter-wide greenhouse, with a total of 4 rows; B represents 3 boxes of asparagus planted in a 6-meter-wide greenhouse, with a total of 6 rows.

[0034] Figure 6 Analysis of the differences in nutritional components between asparagus stem tips and tender tips. Detailed Implementation

[0035] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0036] It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the invention. Furthermore, with respect to numerical ranges in this invention, it should be understood that the upper and lower limits of the range and each intermediate value between them are specifically disclosed. Any stated value or intermediate value within a stated range, as well as each smaller range between any other stated value or intermediate value within said range, are also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0037] Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. While only preferred methods and materials have been described herein, any methods and materials similar or equivalent to those described herein may be used in the implementation or testing of this invention. All references to this specification are incorporated by way of citation to disclose and describe methods and / or materials associated with those references. In the event of any conflict with any incorporated reference, the content of this specification shall prevail.

[0038] High-yield and high-efficiency cultivation methods for asparagus tender tips tea

[0039] In the method of this invention, the asparagus variety is not particularly limited; any asparagus variety with abundant branching can be used as the material. First, a wide-spacing double-row Z-shaped planting method is adopted, and the tender asparagus tips are not harvested in the first year of planting. In the second year, after the asparagus shoots sprout, 5-6 shoots are left per cluster. Once all lateral branches have expanded and flower buds appear, the tender tips are harvested all at once. After harvesting the tender tips, the above-ground stems and all lateral branches are cut off 50-60 cm above the ground, and fertilizer is applied. After harvesting two batches of spring tender shoots, 3-4 mother stems are left per cluster. The mother stems are allowed to grow until mid-August. The above-ground stems are removed, leaving a 20-30 cm stubble for garden cleanup, and fertilizer is applied. One batch of autumn tender shoots is harvested, along with the tender tips sprouting from the stubble. The garden is cleaned, the autumn mother stems are retained, and the above-ground stems are removed in December, followed by fertilizer. In the third year and thereafter after planting, after harvesting the fourth batch of spring asparagus tips, clean the garden, apply fertilizer, and retain the mother stems. The mother stems are left to grow until late August, leaving a 20-30 cm stubble. Clean the garden again and apply fertilizer. Once new shoots sprout, and after 6-8 days when all lateral branches have expanded, harvest the fifth batch of asparagus tips in one go, simultaneously harvesting the tips sprouting from the stubble. After harvesting, clean the garden. In early September, retain the autumn mother stems. In December, remove the above-ground stems and apply fertilizer. Using the method of this invention, in the second year after planting, three batches of asparagus tips and two batches of tips sprouting from the stubble can be harvested; in the third year and thereafter, five batches of asparagus tips and two batches of tips sprouting from the stubble can be harvested. This high-yield and high-efficiency cultivation method for asparagus tips can increase dry weight yield by 34.48%, improve appearance value, and increase nutrient content.

[0040] In a preferred embodiment, the high-yield and high-efficiency cultivation method for asparagus tender shoot tea of ​​the present invention includes:

[0041] 1) Use asparagus varieties with more branches and more concentrated stem development time as materials.

[0042] 2) When cultivating in a 6-meter-wide greenhouse, asparagus seedlings should be planted in double rows in a Z-shape, with a row spacing of 200 cm and a plant spacing of 20 cm, resulting in 3000-3300 seedlings per acre. When cultivating in an 8-meter-wide greenhouse or in open field, asparagus seedlings should be planted in double rows in a triangular shape, with two seedlings per acre, a row spacing of 200 cm and a plant spacing of 20 cm, resulting in 3200-3400 seedlings per acre. Tender asparagus tips should not be harvested in the year of planting.

[0043] 3) In the second year, after the tender asparagus shoots sprout, leave 5-7 shoots per cluster. After 10-15 days, when all the lateral branches have spread out and flower buds appear, harvest the tender tips of 5-6 cm at a time.

[0044] 4) After harvesting the tender shoots, cut off the above-ground stems and all lateral branches 50-60 cm above the ground and remove them from the asparagus field. Apply 10-20 kg / mu of urea and 10-15 kg / mu of NPK compound fertilizer. The fertilization method is to dig a trench 10-15 cm deep along the planting row, 20-30 cm away from the plant, and apply the fertilizer. After fertilization, cover with soil and water thoroughly.

[0045] 5) Do not water asparagus shoots from the time they sprout until the asparagus tea is harvested, in order to control the number of underground buds that sprout.

[0046] 6) After harvesting the second batch of asparagus tips using the methods described in 3-4 above, remove the above-ground stems. After the asparagus sprouts, leave 3-4 tender stems with a diameter of 1.2-1.5 cm per cluster as mother stems. Let the mother stems grow until mid-August, then remove the above-ground stems after leaving a 20-30 cm stubble. Apply 300-400 kg / mu of organic fertilizer, 10-20 kg / mu of urea, and 10-15 kg / mu of NPK compound fertilizer. After the new tender stems sprout, and after 6-8 days when all the lateral branches have expanded, harvest the third batch of asparagus tips in one go, while also harvesting the tender tips that sprout from the stubble. After harvesting, remove the above-ground stems. After the new shoots sprout, leave 5-6 shoots with a diameter of 1.2-1.5 cm in each clump as mother stems. Keep the mother stems until December, remove the above-ground parts of the stems, and apply 500-600 kg / mu of organic fertilizer and 40-60 kg / mu of NPK compound fertilizer.

[0047] 7) In the third year and beyond after planting, after harvesting the fourth batch of asparagus shoots using methods (3)-(4), remove the above-ground stems. In mid-May, after the new shoots sprout, leave 3-4 shoots with a diameter of 1.2-1.5 cm per cluster as mother stems. Keep the mother stems until late August, then remove the above-ground stems after leaving a 20-30 cm stubble. Apply 300-400 kg / mu of organic fertilizer, 10-20 kg / mu of urea, and 10-15 kg / mu of NPK compound fertilizer. After the new shoots sprout, and after 6-8 days when all the lateral branches have spread out, harvest the fourth batch of asparagus shoots grown in open fields and the fifth batch of asparagus shoots grown in greenhouses at once. At the same time, harvest the shoots that sprout from the stubble. After harvesting, remove all the above-ground parts.

[0048] In early September, after the new tender stems sprout, leave 5-6 tender stems with a diameter of 1.2-1.5 cm in each clump as mother stems. Keep the mother stems until December. After the above-ground stems wither and turn yellow, remove the above-ground parts and apply 500-600 kg / mu of organic fertilizer and 40-60 kg / mu of NPK compound fertilizer.

[0049] application

[0050] This invention also provides the application of the above method in improving the yield, appearance value, and nutritional content of asparagus tea. Improving the nutritional content refers to increasing the content of, but is not limited to, sucrose hexasaccharide, sucrose pentasaccharide, anemarrhena saponins, Paris saponins, glycyl-leucine, etc.

[0051] Example 1

[0052] Three-year-old asparagus varieties 'Chuanlu No. 1' and 'Apollo' were used as materials for greenhouse cultivation. Plants were planted in a double-row zigzag pattern with a row spacing of 2 m and a plant spacing of 0.2 m, resulting in 3000 clumps per mu (approximately 0.067 hectares). After the fourth batch of spring tea was harvested on April 24th, the garden was cleaned up. Three stubble heights were set during cleanup: 30 cm, 60 cm, and 90 cm. Spring mother stems were retained until August 26th, when the garden was cleaned up again, again with three stubble heights set. After new shoots sprouted, six shoots were retained per clump. When all lateral branches had expanded and flower buds appeared, the tender tips (5-6 cm long) were harvested in one go, along with the tender tips sprouting from the stubble. The fresh and dry weight of tender tips from 20 plants were investigated for each treatment, with three replicates.

[0053] The results showed that different varieties of asparagus tea yielded significantly different yields even with the same planting method. With 3000 asparagus clumps per mu (approximately 0.067 hectares), and 6 stems per clump, the fourth batch of spring tea from Chuanlu No. 1 yielded a fresh weight of 154440 g (approximately 308.88 jin) and a dry weight of 21240 g (approximately 42.48 jin) per mu for the first batch. Apollo yielded a fresh weight of 134280 g (approximately 268.56 jin) and a dry weight of 18090 g (approximately 36.36 jin) per mu for the fourth batch. The fresh weight of Chuanlu No. 1 tea was 15.01% higher than that of Apollo tea, and the dry weight was 16.83% higher. When harvesting autumn tea, the fresh weight yield of Chuanlu No. 1 tea per mu (approximately 0.067 hectares) is 80,280g (about 160.56 catties), and the dry weight yield is 11,520g (about 23.04 catties). The fresh weight yield of Apollo tea per mu is 76,500g (about 153.00 catties), and the dry weight yield is 10,800g (about 21.60 catties). The fresh weight of Chuanlu No. 1 tea per mu is 4.94% higher than that of Apollo, and the dry weight is 6.67% higher. Therefore, for asparagus-based tender tea shoots, varieties with many branches and relatively low moisture content should be selected.

[0054] The weight of asparagus tips harvested varies depending on the season and stubble height. In spring, a stubble height of 60 cm yields the highest weight of asparagus tips. For example, the yield of Chuanlu No. 1 is 153.6 ÷ 60 × 3000 × 6 = 46080 g (approximately 92.16 jin) per mu, while Apollo yields approximately 83.16 jin per mu. In autumn, a stubble height of 30 cm yields the most tender stems. The yield of Chuanlu No. 1 is approximately 42.84 jin per mu, and Apollo yields approximately 39.96 jin per mu. Because the spring stubble height is around 15 days after the stems have grown, the stems are rich in nutrients after harvesting the asparagus tips. Figure 3 This promotes the sprouting and growth of lateral branches below 60 cm, while autumn stubble retention occurs after about 120 days of stem growth, during which time nutrients flow back to the roots, leaving the stem with less nutrients. Figure 4 Only a few lateral branches can sprout and grow below 30 cm. Furthermore, the height of the stubble left in spring is not necessarily better the higher it is; the first branch of the asparagus stem is generally below 60 cm, and the lateral branches above it have already sprouted into shoots. Only by removing the top and breaking apical dominance will the lateral branches that have not sprouted below 60 cm sprout. Figure 3 Therefore, the yield is slightly lower with a stubble height of 90 cm than with a stubble height of 60 cm. In summary, the suitable stubble height is 50-60 cm in spring and 20-30 cm in autumn.

[0055] Table 1. Effects of variety and stubble height on the yield of asparagus shoot tea.

[0056]

[0057] Example 2

[0058] Asparagus variety "Chuanlu No. 1" was used as the material and cultivated in a 6-meter greenhouse. In the treatment group, plants were planted in a double-row zigzag pattern with a row spacing of 2 m and a plant spacing of 0.2 m. Each greenhouse had 3 boxes, totaling 6 rows, resulting in 3000 nests per acre. After the asparagus shoots sprouted, 5 shoots were left per nest. In the control group, conventional green asparagus cultivation methods were used, with a row spacing of 1.5 m and a plant spacing of 0.25 m, planted in a single row. Each greenhouse had 4 boxes, totaling 4 rows, resulting in 1600 nests per acre. After the asparagus shoots sprouted, 6 shoots were left per nest. Each group comprised 1 acre. No asparagus tips were harvested in the first year after planting. Yield testing began in the third year after planting. In spring, 10-15 days after the asparagus shoots sprouted and the lateral branches had fully expanded, when flower buds appeared, the tender tips (5-6 cm long) were harvested in a single harvest. After harvesting the tender tips, they were removed from the asparagus field. Apply 10-20 kg / mu of urea and 10-15 kg / mu of NPK compound fertilizer as top dressing. The fertilization method is to dig a trench 10-15 cm deep along the planting row, 20-30 cm away from the plant, and apply the fertilizer. After fertilization, cover with soil and water thoroughly. Do not water from the time the asparagus shoots sprout until the asparagus tea is harvested to control the number of underground buds sprouting. After harvesting the fourth batch of asparagus shoots using this method, cut the above-ground part of the stem 50-60 cm below the ground. After the shoots are harvested, remove them from the asparagus field. After the asparagus sprouts, leave 3-4 shoots with a diameter of 1.2-1.5 cm per cluster as mother stems. Leave the mother stems until mid-August, leaving a 30 cm stubble. Remove the above-ground part of the stems and apply 300-400 kg / mu of organic fertilizer, 10-20 kg / mu of urea, and 10-15 kg / mu of NPK compound fertilizer as top dressing. In autumn, after the new shoots sprout and the lateral branches have fully expanded in 6-8 days, harvest the fifth batch of asparagus tips at once. At the same time, harvest the shoots that sprout from the stubble. After harvesting, remove the above-ground stems. After the new shoots sprout, leave 6 shoots with a diameter of 1.2-1.5 cm per cluster as mother stems. Keep the mother stems until December, then remove the above-ground stems and apply 500-600 kg / mu of organic fertilizer and 40-60 kg / mu of NPK compound fertilizer.

[0059] The results showed that different planting densities for the same variety ( Figure 5 The yield of asparagus tea varied significantly. The treatment group had 3000 asparagus buds per acre, with 5 stems left per bud. The control group had 1600 asparagus buds per acre, with 6 stems left per bud. At each harvest, the treatment group harvested 5400 more tender shoots than the control group, resulting in a 50.06% increase in total fresh weight and a 34.48% increase in dry weight per acre.

[0060] Table 2. Yield of asparagus tea at different planting densities

[0061]

[0062] Example 3

[0063] Asparagus variety "Chuanlu No. 1" was used as the material and cultivated in a greenhouse. On March 20th, 30 cm long tender stems were harvested using conventional methods, and the nutritional components of the top 5 cm of the stem tip were analyzed. Using the method of this invention, 5 cm long tender tips with flower buds were harvested after the lateral branches of the tender stems were expanded, and their nutritional components were analyzed. Liquid chromatography-mass spectrometry (LC-MS / MS) was used to analyze the differences in nutrients between the stem tips and tender tips at the metabolomics level.

[0064] like Figure 6 As shown, the results indicate that the tender shoots with flower buds have higher nutritional content than the tender stem tips, with the levels of nutrients such as sucrose hexasaccharide, sucrose pentasaccharide, anemarrhena saponins, Paris saponins, and glycine-leucine increasing by more than two times.

[0065] Therefore, this method can improve the yield and quality of asparagus tender tips tea, resulting in higher economic benefits.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The foregoing embodiments have provided a detailed description of the present invention. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A high-yield and high-efficiency cultivation method for asparagus shoot tea, characterized in that, The method includes: (I) Asparagus seedlings are planted in a wide-spaced double-row Z-shaped pattern. The tender tips of asparagus are not harvested in the year of planting. (II) In the year following the planting, after the tender shoots of asparagus sprout, leave 5-6 shoots per cluster. After all the lateral branches have spread out, harvest the first batch of tender shoots at once. After harvesting the tender shoots, cut the stems 50-60cm above the ground and remove the broken branches. (III) After harvesting the second batch of tender asparagus tips according to the steps in (II), do not leave any stubble. Remove the above-ground stems. After the asparagus sprouts, leave tender stems in each cluster as mother stems. Keep the mother stems until the middle of the year, leave stubble and remove the above-ground stems. (IV) After the new tender stems sprout and the lateral branches have fully expanded, the third batch of asparagus tender tips is harvested at once. At the same time, the tender tips that sprout from the stubble are also harvested. After harvesting, the above-ground parts of the stems are removed. After the new tender stems sprout, each cluster of tender stems is left as the mother stem. The mother stems are left to grow until the end of the year, and the above-ground parts of the stems are removed. (V) In the third year after planting, after harvesting the fourth batch of asparagus tips according to the steps in (II), remove the above-ground stems. After the new tender stems sprout, leave the tender stems in each clump as the mother stem. Keep the mother stems until autumn, leaving a stubble of 20-30cm. Remove all broken branches. After the new tender stems sprout and the lateral branches have fully unfolded, harvest the asparagus tips all at once. At the same time, harvest the tender tips that sprout from the stubble. After harvesting, remove all above-ground parts.

2. The high-yield and high-efficiency cultivation method for asparagus shoot tea according to claim 1, characterized in that, The method further includes: (VI) After the new tender stems sprout, each cluster of tender stems is used as the mother stem. The mother stems are kept until the end of the year. After the above-ground stems wither and turn yellow, the above-ground parts are removed, and organic fertilizer, urea and compound fertilizer are applied.

3. The high-yield and high-efficiency cultivation method for asparagus shoot tea according to claim 1, characterized in that, In step (I), the row spacing is 20-200 cm and the plant spacing is 10-30 cm.

4. The high-yield and high-efficiency cultivation method for asparagus shoot tea according to claim 1, characterized in that, Steps (II)-(V) further include the application of organic fertilizer, urea and compound fertilizer.

5. The high-yield and high-efficiency cultivation method for asparagus shoot tea according to claim 1, characterized in that, In step (II), the year after planting, after the tender shoots of asparagus sprout, leave 5-6 shoots per cluster. After all the lateral branches have spread out, harvest the tender tips all at once. After harvesting the tender tips, cut off the above-ground part of the stem and all lateral branches 50-60 cm above the ground.

6. The high-yield and high-efficiency cultivation method for asparagus shoot tea according to claim 1, characterized in that, In step (III), after harvesting the second batch of tender asparagus tips, remove the above-ground stems. After the asparagus sprouts, leave 3-4 tender stems per cluster as mother stems. Keep the mother stems until mid-August, and remove the above-ground stems after leaving a stubble of 20-30 cm.

7. The high-yield and high-efficiency cultivation method for asparagus shoot tea according to claim 1, characterized in that, In step (IV), after the new tender stems sprout, and after 6-8 days when all the lateral branches have unfolded, harvest the third batch of asparagus tender tips at once. At the same time, harvest the tender tips that sprout from the stubble. After harvesting, remove the above-ground stems. After the new tender stems sprout, leave 5-6 tender stems per clump as mother stems. Keep the mother stems until December, and then remove the above-ground stems.

8. The high-yield and high-efficiency cultivation method for asparagus shoot tea according to claim 1, characterized in that, In step (V), in the third year and beyond after planting, after harvesting the fourth batch of asparagus shoots according to method (II), remove the above-ground stems. In early May, after the new shoots sprout, leave 3-4 shoots per clump as mother stems. Keep the mother stems until late August. Leave a stubble of 20-30 cm and remove the above-ground stems. Apply organic fertilizer, urea and compound fertilizer. When the new shoots sprout and all the lateral branches have spread out, harvest the asparagus shoots planted in the open field and the fifth batch of asparagus shoots planted in the greenhouse at one time. At the same time, harvest the shoots that sprout from the stubble. After harvesting, remove all the above-ground parts.

9. The high-yield and high-efficiency cultivation method for asparagus shoot tea according to claim 2, characterized in that, In step (VI), in early September, after the new tender stems sprout, leave 5-6 tender stems in each nest as mother stems. Keep the mother stems until December. After the above-ground stems wither and turn yellow, remove the above-ground parts and apply organic fertilizer, urea and compound fertilizer.

10. The application of the method according to any one of claims 1-9 in improving the yield, appearance value and nutritional content of asparagus tea.

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