A technique for propagating and transplanting multi-seed taro by cutting seedlings into pieces.

Abstract

This invention provides a technique for propagating and transplanting taro seedlings from cuttings, aiming to reduce the amount of seed taro used and lower production costs. In this invention, the seedling stage of taro propagation using plug trays is 60 days. The germination rate of seedlings from cuttings containing only terminal buds is 90.63%, and the germination rate of seedlings from cuttings containing both terminal and lateral buds is 99.55%, with an overall germination rate exceeding 95%, and the plants exhibiting good growth. This invention effectively solves the land use requirements for taro seedling cultivation through plug trays. Taro has a long growth period; by propagating seedlings in advance using plug trays, the seedling stage does not occupy production land, while also facilitating double-cropping of taro and reasonable crop rotation with other crops. Furthermore, plug tray seedlings show more uniform growth and have a high survival rate when transplanted with roots.

Description

Technical Field

[0001] This invention belongs to the field of crop seedling and cultivation technology, specifically relating to a technique for transplanting and planting multi-seed taro seedlings cut into pieces. Background Technology

[0002] taro[ Colocasia esculenta [L.) Schott] is a plant belonging to the genus *Colocasia* in the family Araceae, mainly distributed in tropical and subtropical swampy areas such as China, India, and the Malay Peninsula. The genus *Colocasia* comprises 10 species, including *Colocasia esculenta*, *Colocasia spp.*, *Colocasia bicolor*, *Colocasia spp.*, and *Colocasia pseudocarpa*, among others. Eight species are found in China, with *Colocasia esculenta* being one of them. Zhang Zhi (1982) divided *Colocasia esculenta* into three categories: large *Colocasia esculenta*, multi-headed *Colocasia esculenta*, and multi-headed *Colocasia esculenta*, further subdividing the multi-headed variety group into green-stalked and purple-stalked varieties.

[0003] The characteristic of multi-branched taro is that it produces many small, clustered tubers, while the mother tuber is fibrous and has an unpleasant taste. Multi-branched taro has a strong tillering ability, and the small tubers are mostly spindle-shaped with slender ends, easily separating from the mother tuber. Its cultivation aims to harvest and consume the small tubers. The small tubers have high nutritional and medicinal value, rich in starch, protein, dietary fiber, vitamins, minerals, and other nutrients and functional components. They are believed to have effects such as strengthening the spleen and stomach, lowering blood pressure and lipids, slowing aging, and enhancing the body's immunity. Multi-branched taro has a powdery, fragrant, and sweet taste, but it is poisonous when eaten raw.

[0004] In traditional field cultivation, taro seed tubers are sown directly into the soil in holes around the Qingming Festival. Compared to direct seeding, plug seedlings offer advantages such as faster seedling establishment, fewer diseases, earlier fruiting, and higher yields. They also have lower production costs, require less labor, save land resources, are not limited by location, are easier to manage, improve the efficiency of mechanized production, and are suitable for long-distance transportation and mechanized transplanting. Currently, plug seedling cultivation has been applied to the propagation of taro seedlings for early spring or late autumn planting.

[0005] In production, the seed quantity used for multi-seed taro cultivation is large, reaching 1500~3750 kg / hm. 2 Furthermore, the use of whole seed tubers for planting often leads to excessively high costs in multi-seed taro cultivation, hindering the sustainable development of the taro industry. For tuber crops, cutting propagation technology can be used to increase the propagation coefficient, reduce seed usage, and lower costs. Cutting propagation techniques are relatively mature for crops like potatoes and konjac, but there are few reports on taro cutting propagation. Seed tubers exhibit apical dominance, with the budding ability and growth vigor of the terminal bud significantly exceeding that of lateral buds. However, there are relatively few terminal buds on seed tubers. Utilizing the propagation capacity of each bud point through taro cutting propagation and applying tray seedling transplanting technology can greatly reduce the seed usage in multi-seed taro cultivation, further saving costs and improving economic efficiency. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0008] Therefore, the purpose of this invention is to overcome the shortcomings of the prior art and provide a technology for the cultivation and transplanting of multi-seed taro cuttings.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solutions, including:

[0010] After the seed tubers are dried, place them with the apical bud facing upwards, cut them lengthwise into pieces, soak the resulting seed tuber pieces in a solution containing growth regulators for 4-5 hours, and then dry them before sterilizing.

[0011] Place the cuttings with the buds facing upwards into the seedling substrate. Cover the cuttings with a thin layer of substrate and water until the seedling substrate is completely moistened but not waterlogged. Keep them warm and cultivate until seedlings emerge.

[0012] Spray water in the morning and evening after emergence to keep the soil moist and apply fertilizer at the same time;

[0013] When the seedlings are more than 20 cm tall, transplant them to the field where base fertilizer has been applied, and apply top dressing once a month after transplanting.

[0014] The types of seed tubers include two types: those containing only one apical bud and those containing one apical bud and multiple lateral buds.

[0015] The growth regulator is a combination of 1.5 mg / L 6-BA and 0.2 mg / L KT.

[0016] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology of the present invention, wherein: the seed taro is uniform in size, free from pests and diseases, and weighs ≥30 g.

[0017] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology described in this invention, the cutting is performed by making 3-4 longitudinal cuts with a knife after disinfection with 75% alcohol.

[0018] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology of the present invention, wherein: the average weight of the seed taro pieces is >7 g.

[0019] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology of the present invention, wherein: the seedling substrate includes bio-organic fertilizer with organic matter ≥60%; the volume ratio of the substrate to the organic fertilizer is 20~22:1.

[0020] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology of the present invention, wherein: the heat preservation culture, wherein the daytime culture temperature is 20~25℃ and the nighttime culture temperature is 10~15℃.

[0021] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology described in this invention, wherein: the fertilization includes,

[0022] When the seedlings are 5-10 cm tall, spray the leaves with a 2000-fold dilution of "Wosheng" medium-element water-soluble fertilizer containing ≥190 g / L Ca+Mg, ≥160 g / L N, and 3-6 g / L Cu+Fe+Mn+Zn+B. When the seedlings are 10-15 cm tall, irrigate with a 1500-fold dilution of 98% potassium dihydrogen phosphate water-soluble fertilizer.

[0023] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology described in this invention, wherein: the transplanting includes,

[0024] For seedlings with both apical and lateral buds, if multiple buds sprout into mature plants, they should be graded according to plant height. Seedlings with a height >20 cm should be separated and transplanted first; the remaining plants should continue to grow until they reach 20 cm before being transplanted.

[0025] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology described in this invention, the base fertilizer is 500~510 kg / 667 m³ of rapeseed cake. 2 Transplanting should be done in the evening or on a cloudy day, and the taro seedlings should be transplanted with the substrate attached; the transplanting depth should be 10-15 cm.

[0026] As a preferred embodiment of the multi-seed taro cutting seedling transplanting planting technology described in this invention, the total amount of fertilizer applied to the multi-seed taro throughout its entire growth period is 280~290 kg / 667 m² of 45% NPK compound fertilizer. 2 Urea 18~22 kg / 667 m 2 Potassium sulfate 30~35 kg / 667 m 2 .

[0027] Beneficial effects of this invention:

[0028] (1) This invention improves the propagation rate of taro by cutting the seed tubers into pieces for seedling cultivation and using lateral buds for propagation. Traditional direct seeding of whole seed tubers requires a large number of seed tubers, resulting in a large seed consumption and a low propagation coefficient, which is difficult to meet the needs of large-scale production. However, by using the method of this invention, the propagation volume is increased many times over, which can reduce the production cost while reducing the seed consumption of taro production and meet the needs of sustainable development of the taro industry.

[0029] (2) This invention can effectively solve the land use requirements of taro seedling raising by using plug trays. Taro has a long growth period. By raising seedlings in plug trays in advance, the seedlings do not occupy production land and are conducive to the double-cropping of taro in one year and reasonable crop rotation with other crops. Moreover, the plug tray seedlings grow more uniformly and have a high survival rate when transplanted with roots.

[0030] (3) In the team’s early experiment, the multi-tuber seed tubers were soaked in water and sprouted for 7 days, and then cut into pieces for seedling cultivation in plug trays. The results showed that the germination rate of the seedlings with only pure apical buds was 76.56%, and the germination rate of the seedlings with both apical and lateral buds was 89.06%. The overall germination rate was higher than 84%. The present invention added 1.5 mg / L of 6-BA and 0.2 mg / L of KT to treat the seedlings, which significantly improved the germination rate of the multi-tuber seed tubers. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0032] Figure 1 This diagram shows the distribution of only the apical taro pieces and seed taro sprouts.

[0033] Figure 2 This is a picture of the pieces being cut and dried.

[0034] Figure 3 This is a diagram of seedling cultivation in seedling trays using cut-up seedlings.

[0035] Figure 4 This is a diagram of a small arched shed.

[0036] Figure 5 This is a diagram of seedling cultivation using pure terminal bud cuttings.

[0037] Figure 6 This is a diagram of seedling cultivation using cuttings that have both apical and lateral buds. Detailed Implementation

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the examples in the specification.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0041] Unless otherwise specified, all raw materials used in this invention are commercially available.

[0042] The specific embodiment of this invention takes the "Yangda No. 1" multi-seed taro as an example, but this breeding method is suitable for conventional multi-seed taro varieties. Example 1

[0043] This embodiment provides a technique for transplanting and planting multi-seed taro seedlings from cuttings, specifically:

[0044] (1) Selection of seed tubers: On January 25, 2024, select multi-seed tubers with a weight of more than 30 g, uniform size and free from pests and diseases;

[0045] (2) Cutting process: On January 26, the selected seed taro was placed with the apical bud facing up for cutting. The taro was cut 3-4 times with a knife disinfected with 75% alcohol to ensure that each piece was basically the same size (the average weight of each piece was more than 7 g) and each piece had a apical bud. The final result was two types of pieces: one with only one apical bud and the other with one apical bud and multiple lateral buds. Figure 1 );

[0046] (3) Hormone treatment: After the seed tubers were cut into pieces, a large wound area was created. They were soaked in a solution containing growth regulators (1.5 mg / L 6-BA + 0.2 mg / L KT) for 4 hours, air-dried, and then soaked in 800 times diluted 50% carbendazim wettable powder for 1 hour for disinfection. After being taken out, they were laid flat on white paper with the wounds facing up and air-dried. Figure 2 );

[0047] (4) Sowing in seed trays: On January 28, the dried taro pieces were placed with the sprouts facing up into 32-cell seed trays filled with 3 / 4 of the seedling substrate. The seed trays were 54 cm long, 28 cm wide, and 11 cm high, with a single cell diameter of 6 cm. The processed taro pieces were then classified into pieces containing only apical buds and pieces containing both apical and lateral buds. Figure 3 After placing the chopped seedlings into the seedling trays, cover them with a small amount of substrate, ensuring the buds are completely submerged. Add bio-organic fertilizer with ≥60% organic matter to the substrate (substrate:organic fertilizer = 20:1; v:v). Then, water thoroughly with a watering can until the substrate is completely moist. Arrange the prepared seedling trays neatly on a flat surface, cover with a small arched tunnel for insulation while maintaining light penetration. Figure 4 ).

[0048] (5) Seedling management: During the seedling raising period, maintain a suitable daytime temperature of 20-25℃ and a suitable nighttime temperature of 10-15℃. During the day, the small arched shed should be opened for ventilation and light. When the temperature inside the shed is higher than 25℃, the greenhouse film can be opened appropriately to enhance ventilation. When the nighttime temperature is lower than 10℃, a small heater should be used for heating. In terms of water management, the substrate in the seedling trays should be kept moist, but water should not be accumulated in the early stage, otherwise it will easily cause the seed tubers to rot. After the seedlings emerge, water should be applied when the substrate is dry. Spraying should be done in the morning and evening to keep the soil moist. When the seedlings are 5-10 cm tall, foliar spray with a 2000-fold dilution of "Wosheng" medium-element water-soluble fertilizer containing Ca+Mg≥190 g / L, N≥160 g / L, and Cu+Fe+Mn+Zn+B:3 g / L~6 g / L. When the seedlings are about 10-15 cm tall, irrigate with a 1500-fold dilution of 98% potassium dihydrogen phosphate water-soluble fertilizer.

[0049] (6) Transplanting seedlings: In early April, choose an evening or a cloudy day to transplant the seedlings from the plug trays with the substrate, taking care not to damage the roots to ensure a high survival rate. Select seedlings with a height of 20 cm or more for transplanting. For seedlings with both apical and lateral buds, if multiple buds have sprouted into mature plants, grade them according to plant height. First, separate and transplant seedlings with a height of 20 cm or more. The remaining seedlings continue to grow in the plug trays until they reach 20 cm, and then transplant them all at once. Apply sufficient base fertilizer (500 kg / 667 m³ of rapeseed cake) before transplanting. 2 ), rid the soil and cover it with mulch. When transplanting, the planting depth should be 10-15 cm, and water thoroughly to help the roots settle.

[0050] (7) Field management: Apply fertilizer once a month after transplanting. The total amount of fertilizer applied during the entire growth period is 280 kg / 667 m² of 45% compound fertilizer. 2 20 kg / 667 m³ of urea 2 Potassium sulfate 32 kg / 667 m 2 Maintain sufficient moisture in the field, pay close attention to the occurrence and control of aphids in the early stage of growth, and focus on the control of spider mites and beet armyworms in the later stage.

[0051] After cutting the taro into seedlings, the sprouting of the taro seedlings was observed every two days and photographed and recorded. The sprouting rate after 30 days, 40 days, 50 days and 60 days of seedling cultivation (Table 1) and the number of sprouts in each seedling after 60 days of seedling cultivation (Table 2) were calculated to demonstrate the improved propagation coefficient of the present invention compared with traditional direct seeding of taro seed.

[0052] Table 1 Germination Rate Statistics

[0053]

[0054] Table 2. Statistics on the number of buds

[0055]

[0056] The multi-headed taro cutting tray seedling transplanting technology in this embodiment can effectively improve the propagation coefficient, reduce the amount of seed used in production, reduce breeding costs, and the cutting seedlings grow well. The multi-headed taro cutting seedling process is as follows: Figure 5 , Figure 6 As shown, the germination rate and growth of tuber cuttings containing only apical buds are better than those containing both apical and lateral buds. This is mainly because apical buds have apical dominance, and tuber cuttings with both apical and lateral buds may be subject to certain growth restrictions when placed in the seedling tray with the lateral buds facing upwards and the apical buds facing the edge of the seedling tray holes.

[0057] As shown in Table 1, in this embodiment, the taro seeds were cut into pieces and treated with a solution of 1.5 mg / L 6-BA + 0.2 mg / L KT. After soaking in a carbendazim solution for sterilization, they were dried and placed in seedling trays for germination rate statistics. A seedling was considered sprouted if it had both a terminal bud and a lateral bud. During subsequent transplanting, if the number of seedlings per hole was greater than one, seedlings were separated to ensure one seedling per hole. After 30 days of seedling cultivation, the germination rate of pure terminal bud pieces was 43.75%, indicating rapid germination. Pieces with both terminal and lateral buds had a lower germination rate of 3.13%. After 50 days of seedling cultivation, the germination rate of pure terminal bud pieces was 90.63%, and the germination rate of pieces with both terminal and lateral buds reached 99.55%, with an overall germination rate exceeding 95%. As shown in Table 2, after 60 days of seedling cultivation, the number of sprouts from the 64 seed tuber cuttings was counted. The 58 tuber cuttings with only one apical bud had a sprout count of 1. The majority of cuttings with both apical and lateral buds had a sprout count of 1. These cuttings were transplanted when they grew to more than 20 cm. Cuttings with two or three sprouts and both apical and lateral buds grew slower due to nutrient competition, and their heights were smaller and varied. They needed to be transplanted according to their height. First, the cuttings with a height of more than 20 cm were separated and transplanted. The remaining short cuttings continued to be cultivated in the substrate until they reached the required height, and were then used for the next batch of transplanting. They could also be used as a safety margin for replanting. Example 2

[0058] The difference between this embodiment and Embodiment 1 is that the mass of the cut pieces is adjusted to 3 g, while the rest of the preparation process is the same as in Embodiment 1.

[0059] The germination rate of the above embodiments and comparative examples was statistically analyzed, and the comparison results with Example 1 are shown in Table 3.

[0060] Table 3 Germination Rate Statistics

[0061]

[0062] As shown in Table 3, adjusting the cutting method significantly affects the germination rate of Taro. This is because an appropriate cutting weight ensures that the seeds receive sufficient nutrients during germination and seedling growth. Cuttings that are too small may not provide enough nutrients, leading to malnutrition and affecting seed germination and seedling growth. According to the results in Table 3, the optimal technical effect is achieved when the cutting weight in this invention is 7g. Example 3

[0063] The difference between this embodiment and Embodiment 1 is that the nighttime temperature for seedling cultivation is adjusted to 5-10℃, while the rest of the preparation process is the same as in Embodiment 1. Example 4

[0064] The difference between this embodiment and Embodiment 1 is that the nighttime temperature for seedling cultivation is adjusted to 25~30℃, while the rest of the preparation process is the same as in Embodiment 1.

[0065] The germination rate of the materials prepared in the above embodiments was statistically analyzed, and the results compared with those of Example 1 are shown in Table 4.

[0066] Table 4 Germination Rate Statistics

[0067]

[0068] As can be seen from Table 4, adjusting the nighttime temperature during seedling raising has a significant impact on the germination rate of Taro. This is because excessively low temperatures during the seedling raising period will delay the physiological function of the seeds, while excessively high temperatures will also hinder seed germination. According to the results in Table 5, the optimal technical effect can be obtained when the nighttime temperature during seedling raising in this invention is 10~15℃.

[0069] Comparative Example 2

[0070] This comparative example provides a traditional method for raising seed taro seedlings, specifically:

[0071] (1) Seedling stage

[0072] The seedling raising cycle for taro in plug trays is about 90 days. Seedling raising can begin from mid-January to late February, depending on the crop rotation schedule. Transplanting can be carried out from mid-April to mid-May, depending on the preparation of the field and the growth of the taro seedlings.

[0073] (2) Selection of seed taro

[0074] Select "Yangda No. 1" multi-seed taro seed tubers weighing around 30-40 g, uniform in size, and free from pests and diseases. Seed tubers that are too small will result in weak seedlings, affecting later yields; seed tubers that are too large will require too much seed and larger-diameter seed trays, increasing costs.

[0075] (3) Site selection and land preparation

[0076] Choose a greenhouse with strong water retention, deep soil, convenient irrigation and drainage, and sufficient sunlight for seedling cultivation. Prepare seedbeds with plug trays inside the greenhouse. Depending on the size of the seed tubers, select 21-32 plug trays with a depth of 9 cm and place them on the seedbeds. Cover the outside of the seedbeds with soil to fix the plug trays and to help retain moisture at the bottom of the seedbed.

[0077] (4) Substrate use

[0078] Commercial substrate specifically designed for seedling cultivation can be purchased directly. Considering the large growth rate of taro seedlings and their relatively high demand for fertilizer, bio-organic fertilizer with ≥60% organic matter can be added to the commercial substrate at a volume ratio of substrate to organic fertilizer of 20:1~22:1, and then mixed well before use.

[0079] (5) Germination

[0080] Soak the selected seed tubers in 25℃ warm water for about 14 days. Keep the germination tray in shallow water, ensuring the main bud of the seed tuber is always above the water surface. When the bud emerges about 1 cm, remove the tubers and prepare them for planting.

[0081] (6) Sowing

[0082] Before sowing, pour 1 / 3 of the substrate into the holes, then sow the seed tubers. Before sowing, cut off any buds except the top of the seed tubers. Sow one seed tuber per hole, and then cover with substrate until the holes are full. Smooth the surface of the seedling tray covered with substrate, then spray water evenly, thoroughly watering the seedbed. After watering, cover with a small arched greenhouse to retain warmth and light while waiting for germination.

[0083] (7) Seedling management

[0084] The ideal daytime temperature for taro seedlings is 20-25℃, and the ideal nighttime temperature is above 10℃. For early spring seedling cultivation, double-layer covering should be used. If the temperature is too low and frost is still present, a straw mat can be added on top of the double-layer agricultural film for insulation at night. During the day, the straw mat and small arched greenhouse should be opened for ventilation and light. When the temperature inside the greenhouse exceeds 25℃, the greenhouse film can be partially opened to enhance ventilation. During the seedling stage, frequent watering is necessary to keep the soil moist, but waterlogging should be avoided in the early stages, as it can easily cause the seed tubers to rot. After emergence, water should be applied when the substrate is dry, preferably in the morning or evening to keep the soil moist. Comparative Example 3

[0085] The difference between this comparative example and Comparative Example 1 is that the seed tubers before sprouting were cut into pieces, while the rest of the preparation process is the same as that of Comparative Example 1. Comparative Example 4

[0086] The difference between this comparative example and Comparative Example 1 is that the seed tubers after sprouting were cut into pieces, while the rest of the preparation process is the same as that of Comparative Example 1.

[0087] The germination rate of the materials prepared in the above comparative example was statistically analyzed, and the results compared with those of Example 1 are shown in Table 5.

[0088] Table 5 Germination Rate Statistics

[0089]

[0090] Table 5 shows that after soaking the cut tubers in growth regulators, the overall germination rate of seedlings in plug trays reached 95.31%. While traditional direct seeding of tubers achieved a germination rate of 99.98%, it required a large quantity of seeds. Further investigation revealed that soaking the tubers in ultrapure water for 14 days after disinfection resulted in a germination rate of only 23.81%, possibly due to excessive water absorption and rotting caused by prolonged soaking. After 14 days of sprouting, cutting and disinfecting the tubers resulted in an overall germination rate of 84%. This may be because mechanical damage to the tubers during cutting could create entry points for pathogens, leading to infection and reduced germination. Alternatively, disinfection may have caused some damage to the tubers while killing or removing pathogens, further decreasing the germination rate. Comparative Example 5

[0091] Select healthy, disease-free seed tubers weighing over 30 g each, uniform in size. Following potato cutting techniques, cut the tubers from top to bottom into segments with terminal buds, middle buds, and basal buds. Generally, 3-4 segments are cut from terminal buds, 2-4 from middle buds, and 2-4 from basal buds. Each segment is roughly the same size and includes one bud. Dry the tuber segments at 17-18℃. After drying, soak them in a growth regulator for 4 hours. After soaking, dry them again and finally place them in an 800-fold dilution of carbendazim solution to form a protective layer before planting them in 32-cell seed trays. Growth regulator treatments were set up using 50 mg / L 6-BA and 50 mg / L paclobutrazol. Untreated tuber segments were used as a control. The germination rates are shown in the table below.

[0092] Table 6 Germination Rate Statistics

[0093]

[0094] The table above shows that after hormone treatment, the apical budding rate was good, but the middle and basal buds did not respond well.

[0095] In summary, the multi-truncate taro seedling cultivation technology described in this invention solves the problems of high seed quantity and high cost in multi-truncate taro cultivation, and the overall seedling survival rate of the cut pieces is higher than 95%. The ratio of crop seed yield to sowing amount per unit area is the propagation coefficient. Statistics show that in multi-plot repeated trials, the average yield of multi-truncate taro cultivation is 2245.8 kg per mu (approximately 0.067 hectares). The seed quantity required for direct seedling cultivation using seed tubers weighing approximately 30 g without cutting is 74.94 kg, while the seed quantity required using the method of this invention is approximately 20.85 kg. Therefore, applying the multi-truncate taro seedling cultivation technology of this invention to multi-truncate taro tray seedling cultivation is expected to increase the propagation coefficient to 3.6 times the original amount and reduce seed quantity by 72.17%. This invention provides important guarantees for the seedling propagation and technology promotion and application of multi-truncate taro, and is of great significance to promoting the industrialization of multi-truncate taro.

[0096] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for transplanting and planting taro seedlings from cut tubers, characterized in that: include, After the seed tubers are dried, place them with the apical bud facing upwards, cut them lengthwise into pieces, soak the resulting seed tuber pieces in a solution containing growth regulators for 4-5 hours, and then dry them before sterilizing. The average weight of the seed tuber is >7 g; Place the buds upwards into the seedling substrate, cover the cut pieces with a thin layer of substrate, and water until the seedling substrate is completely moistened but not waterlogged. Keep warm and cultivate until seedlings grow. The incubation process involves a daytime incubation temperature of 20-25°C and a nighttime incubation temperature of 10-15°C. Spray water in the morning and evening after emergence to keep the soil moist and apply fertilizer at the same time; The fertilization includes, when the seedlings are 5-10 cm tall, foliar spraying with a 2000-fold dilution of "Wosheng" medium-element water-soluble fertilizer containing ≥190 g / L Ca+Mg, ≥160 g / L N, and 3 g / L~6 g / L Cu+Fe+Mn+Zn+B; and when the seedlings are 10-15 cm tall, watering with a 1500-fold dilution of 98% potassium dihydrogen phosphate water-soluble fertilizer. When the seedlings are more than 20 cm tall, transplant them to the field where base fertilizer has been applied, and apply top dressing once a month after transplanting. The type of seed tuber is a cut piece containing one apical bud and multiple lateral buds; The growth regulator is a combination of 1.5 mg / L 6-BA and 0.2 mg / L KT.

2. The method for raising and transplanting multi-seed taro seedlings by cutting them into pieces as described in claim 1, characterized in that: The seed taro is uniform in size, free from pests and diseases, and weighs ≥30 g.

3. The method for raising and transplanting multi-seed taro seedlings by cutting them into pieces as described in claim 1, characterized in that: The pieces are cut by making 3-4 longitudinal cuts with a knife after sterilizing with 75% alcohol.

4. The method for raising and transplanting multi-seed taro seedlings by cutting them into pieces as described in claim 1, characterized in that: The seedling substrate includes bio-organic fertilizer with ≥60% organic matter; the volume ratio of the substrate to the organic fertilizer is 20~22:

1.

5. The method for raising and transplanting multi-seed taro seedlings by cutting them into pieces as described in claim 1, characterized in that: The transplant includes, For seedlings with both apical and lateral buds, if multiple buds sprout into mature plants, they should be graded according to plant height. Seedlings with a height >20 cm should be separated and transplanted first; the remaining plants should continue to grow until they reach 20 cm before being transplanted.

6. The method for raising and transplanting multi-seed taro seedlings by cutting them into pieces as described in claim 1, characterized in that: The base fertilizer is 500-510 kg / 667 m³ of rapeseed cake. 2 Transplanting should be done in the evening or on a cloudy day, and the taro seedlings should be transplanted with the substrate attached; the transplanting depth should be 10-15 cm.

7. The method for raising and transplanting multi-seed taro seedlings by cutting them into pieces as described in claim 1, characterized in that: The total fertilizer application for the entire growth period of the multi-seed taro is 280-290 kg / 667 m² of 45% NPK compound fertilizer. 2 Urea 18~22 kg / 667 m 2 Potassium sulfate 30~35 kg / 667 m 2 .

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