A method and application of propagating seedlings of konjac bulbil

Abstract

The present invention provides a method and application for propagating seedlings of Amorphophallus konjac, belonging to the technical field of plant vegetative propagation. The present invention provides a method for propagating seedlings of Amorphophallus konjac, comprising: picking out propagules from the middle and upper part of the underground corm of Amorphophallus konjac, and planting the picked out propagules and / or the underground corm after picking out the propagules; the diameter of the propagules is ≥1.5 cm, and the propagules do not include the main buds when picking out the propagules. The method for propagating seedlings of Amorphophallus konjac provided by the present invention is based on the characteristics of strong germination ability of the epidermis in the middle and upper part of the underground corm of Amorphophallus konjac, and can arbitrarily pick out propagules with skin and flesh in the middle and upper part of the underground corm. Not only can a single corm be used to pick out a large number of propagules with a high survival rate, but the original underground corm can also continue to be planted as seed taro in the same year.

Description

Technical Field

[0001] The invention belongs to the technical field of plant vegetative propagation, and particularly relates to a method for propagating seedlings of bulbil konjac and its application. Background Art

[0002] Konjac is a perennial herbaceous plant of the genus Amorphophallus in the family Araceae, primarily distributed in tropical and subtropical regions of Asia and Africa. Approximately 170 species are recorded worldwide, including 21 in my country, at least 13 of which are endemic to the country. Konjac is the only plant group discovered to date that can produce large quantities of glucomannan, a sugar found to be water-soluble, thickening, suspending, gelling, and film-forming, making it widely used in industry and medicine. Through the tireless efforts of researchers, the bulbilated konjac has been successfully introduced, domesticated, and cultivated. This is the general term for a type of konjac with bulbils growing on its leaves.

[0003] The pearly konjac is completely different from the traditional konjac. It is native to my country's southwestern border and neighboring South Asia and Southeast Asian countries. It is suitable for tropical and subtropical environmental conditions with high temperature and high humidity. It has the advantages of strong disease resistance and high yield. The successful domestication of this type of konjac has expanded the planting area of ​​konjac.

[0004] At present, the pearl bud konjac mainly adopts bulbil, underground corm and seedling to breed.Traditional propagation material adopts traditional method to carry out seedling (taro) expansion and has certain limitation, under conventional way, can only be 1 (grain) be cultivated into 1 / strain seedling or plant taro, and reproduction rate is relatively low.Adopt the mode of corm or bulbil cutting to expand and multiply, because tangent surface is large, improperly handled, very easily infect rot; Adopt the method for artificial induction flowering and seeding to expand and multiply, although the coefficient of expansion is high, technical difficulty is large, and planter is difficult to grasp; By improving field cultivation management technology measure, also can realize the high yield of propagation material (bulb), but this method is subject to natural environment condition constraint larger, uncertain factors are more, and input cost is high.Therefore, how to provide a method for expanding seedling of the pearl bud konjac that a reproduction coefficient is high is of great significance to the plantation expanding the pearl bud konjac. Summary of the Invention

[0005] The purpose of the invention is to provide more ways to expand and multiply seedlings (seed taro) of pearl bud konjac, increase the supply of seedlings (seed taro), reduce the cost of input, and accelerate the formation of the industry.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The present invention provides a method for propagating seedlings of konjac bulbil, comprising the following steps:

[0008] Pick out propagules from the middle and upper part of the propagation material of the pearly konjac, and plant the picked propagules and / or the propagation material after the picked propagules are picked out;

[0009] The diameter of the propagule is ≥1.5 cm, and the propagule does not include the main bud when the propagule is picked out.

[0010] Preferably, when removing the propagules, each removal position is at least 0.3 cm apart; the bud nest area is not removed.

[0011] Preferably, the propagation material of Amorphophallus konjac includes the underground corm of Amorphophallus konjac.

[0012] Preferably, after the propagules are picked out, the propagules and / or the propagation materials after the propagules are picked out are shade-dried, and the shade-drying time is 12 to 24 hours.

[0013] Preferably, the shade drying includes one or more of natural shade drying, shade drying with carbendazim powder coating and shade drying with quicklime coating.

[0014] Preferably, the removed propagules are stored in sand before planting.

[0015] Preferably, when sand storage is performed, the thickness of the sand covering is 10 to 15 cm.

[0016] Preferably, the sand for sand storage is sterilized, disinfected and dried before use.

[0017] Preferably, the sand storage time is from January to April every year.

[0018] The present invention provides a method for propagating seedlings of amorphophallus konjac, comprising the following steps: picking out propagules from the middle and upper part of a propagation material of amorphophallus konjac, and planting the picked propagules and / or the propagation material after the propagules are picked out; the diameter of the propagules is ≥1.5 cm, and the propagules do not include a main bud when the propagules are picked out. The method for propagating seedlings of amorphophallus konjac provided by the present invention, based on the characteristic of strong sprouting ability of the epidermis in the middle and upper part of the underground corm of amorphophallus konjac, retains the bud nest area and the main bud, and randomly picks out propagules with skin and flesh from the middle and upper part of the underground corm, taking certain measures, and allowing them to germinate and grow into plants under relatively extensive environmental conditions. Not only can a single corm be picked out in large numbers of propagules with a high survival rate, but the original underground corm can also be continued to be planted as seed taro in the same year. By using the method for propagating seedlings of the bulbil konjac provided by the present invention, an average of 14 propagules can be picked out from an underground corm weighing about 300 g, the survival rate of the propagules after sand storage is nearly 80%, the germination rate can reach 100%, and the germination rate of the original underground corm when repeatedly used as a seed taro can reach 100%, which greatly accelerates the propagation speed of the seedlings (seed taro) and can significantly reduce the cost of the seed taro.

[0019] Furthermore, in 2022, the average selling price of underground corm seed taro of pearly konjac on the market was 6 yuan, and the average selling price of commercial taro was 3.3 yuan / kg. If the method for expanding the seedlings of pearly konjac provided by the present invention is used to produce 14,000 seedlings, the required underground corms are about 300 kg, and the cost of purchasing the underground corms is only 1,800 yuan (purchasing seed taro) or 990 yuan (purchasing commercial taro). Even if calculated with an 80% survival rate, the cost of purchasing the underground corms is only 2,160 yuan or 1,188 yuan. The same number of boxed seedlings (unhardened) produced by tissue culture technology have an average selling price of 0.6 yuan / plant, and the average selling price of hardened seedlings is 0.85 yuan / plant. The cost of purchasing seedlings (or seed taro) alone is as high as 8,400 yuan or 11,900 yuan, and the tissue culture environment requirements are strict and the technology is difficult, making it impossible to promote and apply to growers. From this, it can be seen that the method of extracting propagules to expand seedlings (taro) not only has a high multiplication multiple and low cost, but also requires very extensive environmental conditions for implementation of this technology, is simple to operate, easy for growers to master, and extremely easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 These are the front and back views of the propagules extracted from Example 1;

[0022] Figure 2 This is a diagram of the underground bulb after the propagules are removed in Example 1;

[0023] Figure 3 This is a diagram of the germination of the main bud of the original underground bulb after the propagule was removed in Example 1;

[0024] Figure 4 This is a diagram showing the germination of propagules after sand storage in Example 1;

[0025] Figure 5 This is a diagram showing the rooting and growth of the propagules after cultivation in Example 1;

[0026] Figure 6 Schematic diagram of the underground bulb parts. DETAILED DESCRIPTION

[0027] The present invention provides a method for propagating seedlings of konjac bulbil, comprising the following steps:

[0028] Pick out propagules from the middle and upper part of the propagation material of the pearly konjac, and plant the picked propagules and / or the propagation material after the picked propagules are picked out;

[0029] The diameter of the propagule is ≥1.5 cm, and the propagule does not include the main bud when the propagule is picked out.

[0030] In the present invention, the propagation material of the Amorphophallus konjac preferably includes the underground corms of Amorphophallus konjac. In the present invention, the underground corms are preferably mature underground corms, more preferably mature underground corms harvested from the end of November to the beginning of December. In the present invention, the underground corms are preferably plump, free of diseases, pests and mechanical damage; more preferably, the underground corms have a single weight of ≥200g, and most preferably, the single weight is 200-500g. After selecting the underground corms, the present invention preferably air-dries the underground corms. In the present invention, the air-drying time is preferably 3-5d, more preferably 4d. On the one hand, the present invention air-dries the underground corms for the purpose of sterilization and disinfection; on the other hand, it reduces the water content of the underground corms as much as possible. The lower water content makes the extracted propagules less likely to rot. After the air-drying is completed, the present invention preferably cleans the soil attached to the surface of the underground corms and performs subsequent operations or stores them for future use.

[0031] After the drying is completed, the present invention preferably picks out the propagules from the middle and upper part of the underground bulb. The propagules obtained by picking out the middle and upper part of the underground bulb have strong germination ability and high survival rate. In the present invention, the middle and upper part of the underground bulb refers to the area close to the bud nest and the area where the string-like roots are densely grown. In the present invention, the middle and upper part, lower part and bud nest of the underground bulb are described in detail. Figure 6 . The diameter of the propagules obtained by the present invention is preferably ≥1.5cm, more preferably 1.5-3cm, and more preferably 3cm. The propagules will gradually lose water during the subsequent sand storage process. If the propagules are too small, the propagules will lose too much water during the subsequent sand storage process, causing the propagules to shrivel and lose activity. The size of the propagules described in the present invention can provide sufficient water for the subsequent sand storage of the propagules or the budding of the propagules. The present invention has no special restrictions on the instruments for picking out the propagules, and any shape that can meet the relevant picking conditions is acceptable. The present invention has no special restrictions on the shape of the propagules, and any shape that can meet the above conditions is acceptable. In the present invention, the shape of the propagules is preferably hemispherical. The present invention preferably uses a fruit bulber to pick out the propagules. When picking out the propagules, the present invention preferably uses a fruit bulber to aim at the skin of the bulb and forcefully cut into it. A hemispherical propagule can be obtained by rotating it one circle. In the present invention, the propagules preferably have skin.

[0032] The main bud of underground bulb is preferably not included in the propagule that the present invention is extracted. The present invention retains the main bud of underground bulb and can make after obtaining propagule, the remaining underground bulb still has good reproductive ability, can be planted as the propagation material of bulbil konjac, and if the main bud of underground bulb is deducted, bud can sprout from other positions of underground bulb, in this way, the consuming time of sprouting will be very long, bud also can be relatively thin, and multiple buds can be sprouted simultaneously, bud is many and will grow multiple plants simultaneously in field, the nutrient consumption of original corm also can be more, the output of underground bulb and bulbil will be affected. The present invention preferably can extract multiple propagules as propagation material by an underground bulb, and the remaining underground bulb can also be used as propagation material simultaneously. The time of extracting propagule of the present invention is preferably January.

[0033] When the present invention is used to remove the propagules, the distance between the two adjacent propagules is preferably ≥0.3cm, more preferably 0.3-0.5cm. When the present invention is used to remove the propagules, it is preferred not to remove the bud nest area. The purpose of retaining a certain interval when the present invention is used to remove the propagules is: first, it does not affect the activity of the original underground corms. If it is retained below 0.3cm, the original epidermis of the underground corms will dry up during storage, and only the terminal buds will be left active in the original underground corms, which will greatly reduce the growth of the remaining propagation materials (i.e., the remaining underground corms) in the later stage; second, retaining a certain interval is to obtain more propagules. If the interval is greater than 0.5cm, the number of propagules removed will be greatly reduced, and the reproduction multiple will be significantly reduced. If the bud nest area is removed, it will affect the growth of the main bud, and even the main bud will be deformed, which will have an adverse effect on the later growth. If the main bud is also removed when removing the propagules, the original underground corms will sprout many buds. If multiple buds grow at the same time, the nutrient consumption will also be relatively large, which will also have an adverse effect on the later growth. In the process of removing the propagules of the underground bulbs according to the present invention, it is preferred to retain the original epidermis of the underground bulbs connected to each other.

[0034] After the propagules of the konjac are removed, the propagules and / or the remaining propagation material from the removed propagules are preferably shade-dried. When shade-drying is performed in the present invention, the propagules are preferably placed upside down for shade drying. In the present invention, the propagules are preferably placed upside down for shade drying with the epidermis facing downward. The purpose of placing the epidermis of the propagules downward is to prevent underground moisture from directly contacting the wound, thereby reducing decay of the propagules.

[0035] In the present invention, the shade drying preferably includes one or more of natural shade drying, shade drying by applying carbendazim powder and shade drying by applying quicklime.

[0036] In the present invention, if the shade drying is natural shade drying, the present invention preferably shade-dries the propagules or the remaining propagation materials obtained by scraping out in a ventilated, rain-proof and cool place. In the present invention, if the shade drying is shade drying with carbendazim powder applied, the present invention preferably scrapes out the propagules or scrapes out the remaining propagation materials of the propagules, immediately applies carbendazim powder to the wound and then shade-dries. The conditions for the shade drying are the same as those for natural shade drying, and are specifically preferably ventilated, rain-proof and cool. In the present invention, if the shade drying is shade drying with quicklime applied, the present invention preferably scrapes out the propagules or scrapes out the remaining propagation materials of the propagules, immediately applies quicklime to the wound and then shade-dries. The conditions for the shade drying are the same as those for natural shade drying, and are specifically preferably ventilated, rain-proof and cool. In the present invention, the shade-drying time is preferably 12 to 24 hours, more preferably 24 hours. The present invention shade-dries the propagules and the remaining propagation materials obtained by scraping out mainly to reduce the moisture content in the propagules and prevent excessive moisture content, which may cause the propagules to rot when stored in sand. In the present invention, if the propagules obtained by picking out are directly stored in sand without being shade-dried, the survival rate of the propagules obtained by picking out is only about 20%.

[0037] After shade drying is completed, the present invention preferably stores the propagules obtained by digging out in sand. The original underground corms after digging out are preferably stored in a ventilated and cool place; the original underground corms after digging out of the present invention are preferably stored in a ventilated and cool place until the season suitable for planting and can be planted. The present invention has no special restrictions on the sand storage method, and any conventional sand storage method in the field can be adopted. In the present invention, the sand storage is preferably carried out in a ventilated, light-permeable, and rainproof environment. When the present invention performs sand storage, the sand used for the sand storage is preferably sterilized, insecticidal, and dried. The present invention has no special restrictions on the sterilization and insecticide method, and any conventional sandworm sterilization method in the field can be adopted. In the present invention, the sterilization and insecticide method preferably includes spraying a sterilization and insecticide mixed solution in the sand. The present invention has no special restrictions on the type of the sterilization and insecticide mixed solution, and any solution obtained by mixing conventional fungicides or insecticides in the field can be adopted. In the present invention, the fungicide and insecticide mixed solution is preferably a mixed aqueous solution of carbendazim and thiamethoxam; the volume ratio of water, carbendazim, and thiamethoxam in the mixed aqueous solution of carbendazim and thiamethoxam is preferably 2000:20:1. The fungicide and insecticide mixed solution is preferably sprayed on the sand until the sand is thoroughly soaked. After the sand is thoroughly soaked, it is preferably dried before sand storage. During sand storage, the propagules are preferably placed upside down on the sand and then covered with sand. The thickness of the sand and the covering are not particularly limited; conventional sand storage methods in the art can be used. In the present invention, the propagules are preferably placed upside down on 5 cm thick sand. The thickness of the sand covering the propagules is preferably 10 to 20 cm, more preferably 15 cm. The propagules are preferably harvested in January. The harvested propagules are preferably stored in sand between January and April. In the sand storage process of the present invention, the propagules preferably germinate after mid-March. The sand is preferably kept dry during the sand storage process of the present invention; no watering is required during the sand storage process; and the sand storage is preferably carried out in a ventilated, light-permeable, and rainproof shed.

[0038] After the sand storage is completed, the present invention plants the propagules stored in the sand.

[0039] After sand storage is completed, the present invention preferably observes and counts the propagules after sand storage, calculates the survival rate, and so on, to determine the survival rate of the propagules after sand storage. The present invention preferably plants the propagules that are viable. The planting time of the present invention is preferably the end of April or the beginning of May. The present invention does not specifically limit the planting method of the propagules, and conventional underground corm planting methods in the art can be used.

[0040] The method for propagating seedlings of the konjac bulbil is based on the characteristic that the epidermis of the middle and upper parts of the underground corms of the konjac bulbil has strong sprouting ability, retains the bud nest area and the main bud, and randomly picks out propagules with skin and flesh from the middle and upper parts of the underground corm. By taking certain measures, the propagules can sprout and grow into plants under relatively extensive environmental conditions. Not only can a large number of propagules be picked out from a single corm with a high survival rate, but the original underground corm can also continue to be planted as seed taro in the same year.

[0041] In order to further illustrate the present invention, the technical solution provided by the present invention is described in detail below with reference to the accompanying drawings and embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0042] Example 1

[0043] A method for propagating seedlings of pearly konjac, comprising the following steps:

[0044] 1. Select 40 bulbils of Amorphophallus konjac with a single weight of 200-500g. The bulbs should be mature and plump, free of pests and diseases, and free of mechanical damage. Choose a sunny day to dry them for about 3 days, and store them in baskets for later use.

[0045] 2. Prepare a sand bed in a rainproof, ventilated shade shed with a thickness of 20 cm;

[0046] 3. Prepare a bactericidal and insecticidal mixed solution with a volume ratio of water, carbendazim and thiamethoxam of 2000:20:1;

[0047] 4. Half a month before using the sand bed, thoroughly soak the sand bed with the sterilization and insecticide mixed solution in step 3. After soaking the sand bed, dry the sand bed and use the dry sand bed for subsequent treatments.

[0048] 5. After the sand in the sand bed is completely dry, shovel out all the sand in the sand bed and place it aside for later use;

[0049] 6. Prepare a 32-hole seedling tray with a hole depth of 10 cm, and place the seedling tray on the sand bed in step 5. Fill the holes in the seedling tray with the sand shoveled out in step 5 to a thickness of 5 cm.

[0050] 7. Prepare quicklime and carbendazim powder;

[0051] 8. Prepare a fruit baller with a spoon diameter of 3cm;

[0052] 9. Use the spoon of the fruit bulber to cut into the surface of the underground corm, rotate it a circle and pick out the hemispherical propagule with skin and flesh. The propagules picked out from the underground corm are as follows: Figure 1 As shown, Figure 1The three propagules on the left are the reverse side of the propagules; the three propagules on the right are the front side of the propagules. After the propagules are removed, they are weighed on site for subsequent statistical processing. At the same time, in order to ensure that the original underground corms still have the ability to germinate and the survival rate of the propagules after the propagules are removed, the main buds should be retained, and the bud nest area and the area below the middle of the underground corm should not be removed. The positions of the two adjacent propagules removed should be 0.5 cm apart, so that the corms retain the original epidermis connected to each other;

[0053] 10. The propagules were divided into three treatments: natural shade drying, shade drying with carbendazim powder, and shade drying with quicklime. Each treatment had three replicates, 32 seeds per replicate, and a total of 96 seeds per treatment. Three seedling trays constituted one treatment. Natural shade drying was done by directly shade drying the propagules after they were obtained without any treatment; shade drying with carbendazim powder was done by immediately applying carbendazim powder to the wounded surface of the propagules after they were obtained, and then shade drying was carried out; shade drying with quicklime was done by immediately applying quicklime to the wounded surface of the propagules after they were obtained, and then shade drying was carried out.

[0054] 11. After completing step 10, place the propagules upside down (upside down means the epidermis faces downward) in the holes of the seedling tray, one seed per hole, and dry them in the shade for 24 hours. Then cover them directly with the sand from step 5, with a thickness of 15 cm.

[0055] 12. After the propagules are removed, apply quicklime to the original underground corms. Figure 2 As shown in the figure, the germination of the main buds of the underground corms remaining after the propagules are removed is as follows: Figure 3 As shown, store it in a ventilated and cool place and plant it directly in the appropriate planting season;

[0056] 13. In April of the second year, the propagules were taken out and those that were shriveled or rotted were deemed to have lost their activity. The active ones were weighed and the water loss rate was calculated. The survival rate was also counted and calculated.

[0057] The calculation formula for water loss rate is:

[0058] Water loss rate = [(average fresh weight before sand storage - average fresh weight after sand storage) / average fresh weight before sand storage] × 100%;

[0059] The survival rate is the survival rate of the propagules after sand storage. The calculation formula of the survival rate is:

[0060] Survival rate = [number of surviving propagules / total number] × 100%;

[0061] The observation method of surviving propagules is as follows: First, if buds have sprouted, Figure 4, which is a living reproductive body; the second is without buds, and you can pick out a small area of ​​the epidermis to see if it is fresh. Freshness means it has vitality, and it is a living reproductive body; the third is that it is shriveled and rotten, which is a non-living reproductive body.

[0062] The fresh weight statistics of the propagules just picked out in each treatment group in Example 1 are shown in Table 1; the fresh weight statistics of the propagules after sand storage in each treatment group are shown in Table 2; the survival rate statistics of the propagules after sand storage in each treatment group are shown in Table 3. Figure 5 .

[0063] Table 1 Statistical results of fresh weight of freshly picked propagules in each treatment group

[0064]

[0065] Table 2 Statistical results of fresh weight of propagules after sand storage in each treatment group

[0066]

[0067] Table 3 Statistical results of survival rate of propagules after sand storage in each treatment group

[0068]

[0069] As shown in Tables 1-3, the average fresh weight of the propagules from the three treatments was 11.1 g, the average weight of the propagules after sand storage was 6.1 g, and the average water loss rate was 45%. The survival rate of the propagules after sand storage was nearly 80%, with 78.13% for natural shade drying, 81.25% for shade drying with carbendazim powder, and 78.13% for shade drying with quicklime. All surviving propagules sprouted, and when transplanted to seedling medium and managed according to conventional field practices, the survival rate was 100%. Furthermore, the original underground corms of the propagules can be directly planted in the field as seed taro that year, with a similar survival rate of 100%.

[0070] Example 2

[0071] A method for propagating seedlings of bulbil konjac comprises the same steps as those in Example 1, except that the diameter of the spoon of a fruit baller used for removing propagules is 1.5 cm.

[0072] The statistical results of the fresh weight of the propagules just picked out in each treatment group in Example 2 are shown in Table 4; the statistical results of the fresh weight of the propagules after sand storage in each treatment group are shown in Table 5; the statistical results of the survival rate of the propagules after sand storage in each treatment group are shown in Table 6.

[0073] Table 4 Statistical results of fresh weight of freshly picked propagules in each treatment group

[0074]

[0075]

[0076] Table 5 Statistical results of fresh weight of propagules after sand storage in each treatment group

[0077]

[0078] Table 6 Statistical results of survival rate of propagules after sand storage in each treatment group

[0079]

[0080] Tables 4-6 show that the average fresh weight of propagules from the three treatments was 3.7 g, and the average weight of propagules after sand storage was 1.0 g. The average survival rate of propagules after sand storage was less than 40%, with a rate of 31.25% for natural shade drying, 40.63% for shade drying with carbendazim powder, and 43.75% for shade drying with quicklime. Although the survival rate was low, each surviving propagule germinated and, when transplanted to seedling medium and managed according to conventional field practices, achieved a 100% survival rate. Furthermore, the underground corms removed from the propagules can be directly planted in the field as seed taro that year, also achieving a 100% survival rate.

[0081] Comparative Example 1

[0082] A method for propagating seedlings of konjac bulbil has the same steps as those in Example 1, except that the propagules are picked out from the lower part of the underground corm.

[0083] The statistical results of the survival rates of the propagules after sand storage in each treatment group in Comparative Example 1 are shown in Table 7.

[0084] Table 7 Statistical results of survival rate of propagules after sand storage in each treatment group

[0085]

[0086] As shown in Table 7, the survival rate of propagules obtained by picking out the lower part of the underground corm was significantly lower than that of propagules picked out from the middle and upper parts of the underground corm. Compared with the lower part of the underground corm, the middle and upper parts of the underground corm are more suitable for the propagation of bulbil konjac seedlings.

[0087] Comparative Example 2

[0088] A method for propagating seedlings of Amorphophallus konjac comprises the same steps as those in Example 1, except that the propagules obtained are not shade-dried but directly stored in sand.

[0089] The statistical results of the survival rate of the propagules after sand storage in Comparative Example 2 are shown in Table 8.

[0090] Table 8 Statistical results of survival rate of propagules after sand storage in comparative example 2

[0091]

[0092] In the process of picking out the propagules, the present invention does not perform shade drying on the propagules, so most of the propagules picked out rot during the sand storage process, and the average survival rate is only about 20%.

[0093] In summary, the method for picking out propagules of konjac (Amorphophallus truncatus) and expanding seedlings provided by the present invention, based on the characteristic that the epidermis in the middle and upper parts of the underground corms of the Amorphophallus truncatus has strong germination ability, can randomly pick out propagules with skin and flesh in the middle and upper parts of the underground corms, can obtain multiple propagules with reproductive ability by picking out a single corm, and the obtained propagules have a high survival rate and good growth condition, thereby providing a highly feasible, simple and convenient method for the rapid propagation of the Amorphophallus truncatus.

[0094] Although the above embodiment provides a detailed description of the present invention, it is only a part of the embodiments of the present invention, not all of the embodiments. People can also obtain other embodiments based on this embodiment without creativity, and these embodiments all fall within the scope of protection of the present invention.

Claims

1. A method for propagating seedlings of konjac, characterized in that: The following steps are involved: Pick out propagules from the middle and upper part of the propagation material of the pearly konjac, and plant the picked propagules and / or the propagation material after the picked propagules are picked out; The diameter of the propagule is 3.0 cm; the propagule is hemispherical; when the propagule is removed, the propagule does not include the main bud; When removing propagules, the interval between each removal position should be 0.3~0.5cm; the bud nest area should not be removed; The propagation material of the konjac bud comprises the underground corm of the konjac bud; the weight of a single underground corm of the konjac bud is 200-500 g; The underground corms are air-dried before the propagules are removed; the air-dried time is 3 to 5 days; After the propagules are picked out, the propagules and / or the propagation materials after the propagules are picked out are shade-dried, and the shade-drying time is 12 to 24 hours; After the shade drying is completed, the propagules obtained are stored in sand; the sand storage time is from January to April every year.

2. The method according to claim 1, characterized in that The shade drying includes one or more of natural shade drying, shade drying with carbendazim powder coating and shade drying with quicklime coating.

3. The method according to claim 1, characterized in that When sand storage is carried out, the thickness of the sand covering is 10 to 15 cm.

4. The method according to claim 3, characterized in that The sand used for sand storage must be sterilized, insect-free and dried before use.

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