JP4848234B2 - Planting seedlings for plant cuttings - Google Patents

Description

  The present invention relates to a method for raising a plant cutting seedling, and particularly to a seedling raising technique for growing a cutting seedling firmly by a simple method.

In the production of plants such as vegetables, flower buds and trees, the required nursery area and labor force vary greatly due to seasonal fluctuations in demand for seedlings. Therefore, in order to equalize seasonal changes in the nursery area and labor force and to stably supply seedlings efficiently, a technique for storing seedlings in a low light and low temperature environment for a certain period is used.
As seedlings stored in such a low-light and low-temperature environment, cutting seedlings (cutting seedlings) or grafting seedlings (grafting seedlings) are used in addition to seedlings cultivated from seeds.
When producing cuttings, seedlings and shoots of plants are generally collected as cuttings, planted in a medium, cured until rooted in a low-temperature environment, and then stored in a low-light and low-temperature storage as described above. The In this case, cuttings immediately after being embedded in the culture medium have low water absorption capacity because they do not have roots at the open end (lower end), and are susceptible to water stress, so mainly suppress the loss of water due to transpiration from the leaves. Therefore, the curing environment is generally kept at high humidity.

Recently, various methods for promoting rooting of cuttings have been proposed.
In Patent Document 1, cuttings are stored in air at 1 to 5 ° C. in a refrigerator for 6 to 21 days, subjected to low-temperature treatment, then cuttings are landed, and then the lower ends of the cuttings are immersed in an aqueous rooting agent solution. Then, rooting promotion treatment is performed, and then cuttings are planted in the culture soil in the pot, the pot is placed on a saucer in which water of 15 to 30 ° C. is stored, and the air atmosphere is adjusted to a relative humidity of 80 to 90%. A method for rooting cuttings by curing for 4 to 6 days is disclosed.
Further, in Patent Document 2, cuttings are planted in an insertion floor soil in a seedling box, and the seedling box is placed on a seedbed open ground laid with a heating wire, covered with a vinyl tunnel and sealed, 70 to 90% A method for rooting cuttings by heating at a temperature of about 20 to 25 ° C. in the daytime and about 15 ° C. in the nighttime while maintaining a high humidity of 5 is disclosed.
In addition, Non-Patent Document 1 discloses a method of efficiently promoting rooting while suppressing consumption of plants by locally immersing the open ends of cuttings in a warm and low temperature environment in a low light environment. It is disclosed.
JP 2003-304760 A JP-A-5-328840 Terakura, Shibuya, and two others, “Effects of heating treatment of short-term supply culture during low-temperature storage of cucumber cuttings on quality during storage and rooting after storage”, Biological environment regulation, 42 (2) , P. 331-337, 2004

As described above, cuttings immediately after being planted in the medium are difficult to absorb moisture, are susceptible to water stress, and are susceptible to wilt, so the environmental atmosphere is kept at a low temperature and high humidity to suppress water loss due to transpiration. However, the following problems have arisen.
(1) Special environmental control equipment is required to increase the humidity at a low temperature, resulting in high equipment costs.
(2) Since the cuttings are in a high humidity environment, they are susceptible to mold and other diseases.
(3) By storing the cuttings in a high-humidity environment, the cuttings seedlings tend to be soft in the subsequent curing / acclimation process.
(4) When curing under natural light such as in a greenhouse, it is necessary to increase the humidity in the curing facility by sealing with a film, but it is difficult to control the curing temperature environment.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for raising a cutting plant seedling of a plant capable of curing and growing a cutting plant seedling by a simple method without controlling the environment for curing the cutting plant at high humidity. And

Thus, according to the present invention, a step (a) of planting cuttings collected from a plant into a molding medium, and a step (b) of maintaining a plurality of cuttings with the molding medium vertically using a holding member and curing them. With
Wherein wherein in the step (b), in which Ru Nutrient raw water which is maintained at 15 to 35 ° C. in curing tank, said plurality of cuttings was immersed to the water absorbing possible positions, and the temperature of the atmosphere leaves the cuttings are exposed There is provided a method for raising seedlings of plant cuttings that are maintained at a lower temperature than the curing water.

Cuttings immediately after being collected from a plant and planted in a medium are susceptible to a great deal of stress due to their weak water absorption. According to the present invention, in the process of curing such a cutting with many stresses, by immersing the cutting in the curing water up to a position where water can be absorbed, the cutting tree can be deflated without increasing the humidity in the storage in the curing process. Can be reduced. In addition, special and expensive equipment for maintaining the curing environment at low temperature and high humidity is not required, and cuttings can be cured with a simple device that does not require equipment costs.
In addition, according to the present invention, it is easy to reduce the water vapor saturation under low temperature control, and therefore, it has an advantage of easily suppressing moisture transpiration of cuttings.
Moreover, when curing cuttings at room temperature, light irradiation with a certain level of light intensity is required, but in the present invention, light irradiation can be omitted because of the low temperature atmosphere management, and the curing equipment can be simplified. it can.
In addition, if a plurality of curing tanks are installed on multiple shelves and the curing water in each curing tank is heated, purified and circulated in one curing water supply source, a large amount of cuttings can be obtained even in a small facility. Curing water can be controlled to a uniform temperature at a uniform temperature with simpler equipment than the method of installing a planar heater in each curing tank, and the curing process is efficient and low cost In addition, the moisture supply to the cuttings can be performed continuously and naturally.
In addition, rooting from the open end is promoted by locally heating the open end of the cutting in the molding medium with curing water, and rooting in a short period of time (for example, about 1 to 5 days). It can be a seedling. As a result, the cuttings seedlings after the curing process have an active water absorption capability, so that they can quickly acclimatize to the outdoor environment and shorten the seedling raising period. Further, since the roots of the cuttings are in the molding medium, the roots are not damaged when the cuttings are planted in the medium, and there is no problem that the roots are damaged and the disease is caused.
In addition, even when cutting seedlings that have undergone a curing process are stored for a long time under low light and low temperature environmental conditions, cuttings seedlings are sufficiently rooted, so as long as water is supplied to the roots, the atmosphere can be maintained. There is no need to maintain high humidity, and no special and expensive equipment is required to maintain the low temperature storage in high humidity in the low light / low temperature storage process, and the equipment cost can be greatly reduced.

The plant cutting method for plant cuttings according to the present invention includes a step (a) of planting cuttings collected from a plant into a molding medium, and a step of maintaining and curing a plurality of cuttings with the molding medium vertically using a holding member. (b) and equipped with, in the step (b), in which Ru Nutrient raw water which is maintained at 15 to 35 ° C. in curing tank, said plurality of cuttings was immersed to the water absorbing possible positions, and the leaves of the cuttings Curing is performed while maintaining the temperature of the exposed atmosphere at a temperature lower than the curing water.

  In the present invention, as the curing water, water such as natural water (ground water, spring water, etc.) and tap water that does not contain harmful substances is used. Moreover, the curing water may contain a culture component from the viewpoint of promoting rooting of cuttings. Examples of the culture component include components such as nitrogen, phosphorus and potassium which are generally effective for raising seedlings. For example, commercial products such as Otsuka House No. 1 and No. 2 manufactured by Otsuka Chemical Co., Ltd. are cured. It can be used by adding an appropriate amount to water. In addition to the culture components, plant growth regulators such as benzyladenine may be added.

The present invention, after the step (b), a step (c) of planting a cutting medium seedling with a molded medium pulled up from the curing water into a medium as a nursery and cultivating, and a new plant from the plant cultivated in the step (c) A step (d) of collecting cuttings and planting them in a molding medium, and after the step (d), using the cuttings with molding medium formed in the step (d), the steps (b), (c) and (D) may be repeated in this order. In this way, it is possible to efficiently mass-produce cutting seedlings with a small nursery area.

Moreover, this invention may further comprise the process (e) of planting the cutting seedling with a shaping | molding culture medium pulled up from the curing water in the culture medium as a nursery bed after the said process (b), and acclimatizing to an outdoor environment. In this way, it is possible to acclimatize the types of cuttings that are vulnerable to rapid environmental changes to the outdoor environment.
Furthermore, the present invention further includes a low light / low temperature storage step (f) of storing the cuttings and seedlings pulled up from the curing water at a low temperature for a predetermined period in a storage where the light amount and water supply are adjusted after the curing step (b). In addition, after the low light / cold storage step (f), it may be transferred to the outdoor acclimatization step (e) or cutting cutting multiplication step (c). If it does in this way, the quantity of cuttings seedlings moved to an outdoor acclimatization process (e) can be adjusted, and cuttings seedlings can be mass-produced efficiently.
Or in the case of the kind of cutting seedling of the kind which is easy to acclimatize to an outdoor environment, after the said process (b), you may plant the cutting seedling with a shaping | molding medium pulled up from the curing water to the culture medium as a seedbed, and cultivate outdoors.

Hereinafter, the present invention will be specifically described with reference to FIG.
(Cutting planting process)
In the cutting planting step, first, the top buds, buds, shoots, and the like that are the cuttings 1 are collected from the desired plant P1. At this time, excision of the top buds, buds, shoots and the like with a sharp blade is preferable in order to avoid damaging the plant tissue as much as possible.
Thereafter, the open end of the collected cutting 1 is planted in the molding medium 2. The molding medium 2 is preferably one that is difficult to dissolve in water or a culture solution, and a commercially available one can be used. Examples of commercially available molding media include Jifie's product name: Preformer Box Plug, Grodan's product name: Glow Cube, and Nisso Green Co., Ltd. product name: Oasis cutting medium.

(Curing process)
In the curing process, the plurality of cutting medium-attached cuttings 1 formed in the previous cutting planting process are immersed vertically in the curing water W in the curing tank 12 using the holding member 11. The temperature of the curing water W in which the cutting 1 is immersed is preferably 15 to 35 ° C., which is the temperature at which rooting is promoted from the open end in the molding medium 2 of the cutting 1, and the ambient temperature is from the leaves of the cutting 1 From the viewpoint of suppressing carbohydrate consumption due to moisture transpiration and respiration, the temperature is preferably at least lower than the temperature of the curing water, more preferably 0 to 20 ° C, and particularly preferably 0 to 15 ° C.
The temperature of the curing water W is uniform in the curing tank 12 and may be maintained in a temperature range of 15 to 35 ° C., but it is preferable to control the temperature of the curing water W to a more optimal temperature according to the type of cuttings 1. For example, in the case of vegetables, it is preferably 25-30 ° C., more preferably 27 ° C. for eggplants, preferably 25-30 ° C., more preferably 27 ° C. for tomatoes, preferably 23-36 ° C., more preferably 28 ° C. for cucumbers. is there. In the case of trees, it is around 28 ° C. for oleander.
In addition, when the temperature of curing water becomes lower than 15 degreeC, the rooting of cuttings will become slow or will not root depending on the kind of plant. Therefore, the cuttings that have been planted in the medium afterwards have a slow root growth even after rooting, and tend to take days to acclimatize to the outdoor environment. On the other hand, if the water temperature is higher than 35 ° C., the cuttings will rise and die. In addition, if the ambient temperature is lower than 0 ° C, a low-temperature injury that damages the tissue of the cuttings occurs. If the ambient temperature is higher than 20 ° C, the cuttings grow and cannot be adjusted for production, and tend to grow into fragile cuttings. It is in.

In the curing process, the cuttings 1 may be irradiated with weak light continuously or intermittently, but light irradiation may not be performed. As a light source in the case of light irradiation, for example, a three-wavelength type white fluorescent lamp (FHF32EX-WH, Matsushita Electric Industrial Co., Ltd.) can be used, and a light amount (photosynthesis effective photon flux density) is 0 to 30 μmol ⁻² s ^-1 is appropriate.

  Equipment and facilities for curing the cuttings 1 are not particularly limited as long as the curing water W and the atmospheric temperature can be controlled within the above-described temperature range, and a special device is not necessarily required. For example, the curing tank 12 for storing the curing water W and the holding member 11 for dipping the curing water W to a position where water can be absorbed while holding the cuttings 1 vertically are necessary, but if the outside air temperature is 20 ° C. or less. It can be set as a simple apparatus structure which installs a curing tank outdoors and installs a heater with a temperature sensor in a curing tank. However, in order to maintain the atmospheric temperature and the water temperature within a certain range throughout the year, it is preferable to cure the cuttings 1 by installing a curing tank 12 (for example, a thermostatic tank) in an air conditioned room.

In this embodiment, one or more seedling holding units U composed of a plurality of cuttings 1 and plate-like holding members 11 holding these are installed in a curing device in a curing facility as shown in FIG. to go into. At this time, a plurality of cuttings 1 can be transported by one holding member 11, and transportability is excellent.
As this holding member 11, for example, a plate made of light polystyrene or sponge floating in water can be used, and the stem of the cutting 1 can be inserted by forming cuts at equal intervals on one end edge extending in the longitudinal direction of the plate. What should I do? Or as shown in FIG. 2, you may comprise a holding member by two types of members. That is, a plurality of small plates 11a having a single notch are prepared, and one cutting tree 1 with a molding medium is inserted into each small plate 11a, while a plurality of holes are formed on the curing water W in the curing tank 12. The substrate plate 11b is opened and a plurality of cuttings 1 are dropped into the respective holes of the substrate plate 11b from the molding medium 2 so that the small plate 11a is hooked on the substrate plate 11b, and the cuttings 1 are perpendicular to each other so that they can absorb water. Held in shape.
In addition, the holding member that insulates the water surface and directly above is not necessarily required. If the water temperature is set to be somewhat high and the air temperature is set to be low, the temperature around the cuttings can be made the same as when the holding member is present. . In that case, the molding medium may be fixed in water using a holding tray or the like.

  This curing device is a curing water control unit that circulates and supplies the curing water 12 in which the curing water W is stored and the purified curing water W in the curing tank 12 and controls the temperature of the curing water W in the curing tank 12. 13 is provided. The curing water control means 13 includes a circulation pipe for supplying and discharging the curing water W in the curing tank 12, a pump and a filter connected to the circulation pipe, and a heater for controlling the curing water W at 15 to 35 ° C. To do. Further, in the curing facility where the curing device is installed, a low light lamp 14 for irradiating the cutting 1 with weak light and an air conditioning facility capable of controlling the indoor temperature are provided.

In the curing process, the seedling holding unit U floats on the curing water W, the open end of the cutting medium 1 in the molding medium 2 is immersed in the curing water W at 15 to 35 ° C., and the leaves of the cutting 1 are lower than the curing water 0 It is exposed to air at -20 ° C. In addition, light of 0 to 30 μmolm ⁻² s ⁻¹ is emitted from the weak light lamp 14.
In the present invention, the cutting is soaked in the curing water up to a position where water can be absorbed, and moisture supply to the cutting is reliably performed. Therefore, the environmental humidity is not particularly limited, and it is not necessary to control the humidity. Therefore, special and expensive equipment for maintaining the low-temperature air at high humidity can be omitted, and the curing device can be simplified and reduced in cost.

In the present invention, the curing process ends when the cutting 1 is rooted to some extent (about 5 to 10). By rooting cuttings 1 during the curing process, even if the cuttings 1 are subsequently pulled up from the curing water W and planted in the culture medium, the water absorption is increased and it becomes difficult to wither, leading to the outdoor (atmospheric) environment. It becomes easy to change.
The number of days to root after immersing the cutting 1 in the curing water W is slightly different depending on the type of plant. For example, in the case of vegetables, it has been confirmed by experiments that it is 3-7 days for eggplants, 3-7 days for tomatoes, and 1-3 days for cucumbers. In the case of bridegroom, it has been confirmed by experiments that chrysanthemums are about 7 days. In the case of trees, it is confirmed by experiments that oleander is 10 to 14 days and poplar is 9 to 13 days.

  After this curing process, among the plurality of cutting seedlings 4 (cutting trees with roots) cured in the same curing tank 12, all may be transferred to the cutting propagation process, or all may be transferred to a low light / low temperature storage process. Alternatively, a predetermined number of them may be inserted and distributed to the tree growth process and the low light / low temperature storage process. For example, it is preferable to observe the state (rooting amount, leaf and stem color, leaf size, stem thickness, etc.) of a plurality of cutting seedlings 4 and transfer the best group to the cutting propagation step.

(Cutting propagation process)
In the cutting growth process, the seedling holding unit U is taken out from the curing tank 12, and the cutting seedling 4 that is the cutting 1 with the root 3 growing in the molding medium 2 is planted in the medium (seed bed) 5. This cutting growth process is carried out in a seedling environment where the cuttings 4 grow robustly, for example, in an indoor facility equipped with a culture medium in an outdoor facility such as a greenhouse having an air conditioner installed outdoors, or an air conditioner and lighting. It can be performed by planting the cuttings 4 in the culture medium, supplying appropriate light and moisture necessary for the growth of the cuttings 4 and adjusting the temperature and humidity in the facility, so that new cuttings 1 can be collected one after another. The purpose is to cultivate the cuttings 4. In addition, in FIG. 1, the code | symbol P2 represents the plant grown in the cutting growth process.

(Cutting cycle planting process)
In the cutting cutting circulation planting step, new cuttings 1 (top buds, buds, shoots) are collected from the plant P2 grown in the cutting growth step, and the open ends of the cuttings 1 are planted in the molding medium 2. The size of the cutting 1 to be collected, the sampling method, the method of implantation into the molding medium 2, the type of the molding medium 2, etc. can be in accordance with the first cutting planting process.
The cutting medium 1 with the molding medium formed in this cutting circulation circulation planting process is transferred to the curing process again and cured until rooting, and the cutting propagation process, cutting cutting circulation implantation process, and curing process are repeated once or more once, and the weakness described later Moved to light / cold storage process or immediately moved to low light / cold storage process, outdoor acclimatization process or outdoor cultivation (including shipping).

(Low light / low temperature storage process)
The low light / low temperature storage process is mainly intended for adjustment of seedling production, and the cutting seedling 4 rooted in the curing process is stored for a predetermined period under low light and low temperature environmental conditions. At this time, it is necessary to replenish the cuttings 4 with water, but there is no need for an apparatus or facility that maintains unreasonable environmental conditions such as maintaining high temperature in low-temperature air. For example, the roots of the seedlings were immersed in water in a water tank (water temperature equivalent to room temperature) installed in a storage controlled at a low temperature (15 ° C. or lower), or were continuously moistened through a molding medium. The roots of the tree seedlings may be brought into contact with each other through a molding medium by being inserted into a cloth, a nonwoven fabric, a water absorbent resin, or a combination thereof. In addition, water may be replenished by the method described above, but if water is sprayed regularly, water is stored in the molding medium, so that the cuttings can absorb moisture and nutrients in the molding medium by the roots. it can. The cutting seedling holding member used in the curing process can be used as it is in the storage.

  In this embodiment, as shown in FIG. 1, the seedling holding unit U taken out from the curing tank 12 is installed in a shelf shape in the storage as it is, and a sprinkling pipe is placed on the floor below each of the suspended shaped culture media 2. 15 exemplifies the case of a facility that supplies water to each cutting seedling 4 by supplying water from the water supply source 16 to the sprinkling pipe 15. Further, a weak light lamp 17 is provided in the storage, and an air conditioning facility for controlling the temperature and ventilation in the storage is provided.

In the low light / low temperature storage step, the temperature (room temperature) is preferably 15 ° C. or lower in order to preserve for a certain period (several weeks to several months) in a state where the growth of the cuttings 4 is stopped or blunted. Moreover, as the weak light lamp 17 which irradiates the cutting seedling 4 with light, the thing similar to a curing process can be used, and 0-30 micromol ^<-2 > s ^{< -1} > is suitable as a light quantity (photosynthesis effective photon flux density), and it is continuous. The light can be irradiated regularly or intermittently.
This low-light / low-temperature storage process has the role of curing cuttings and seedlings, but is mainly intended for production adjustment. Therefore, when it is desired to ship cutting seedlings early, the low light / low temperature storage step may be omitted, and immediately after the curing step, it may be transferred to an outdoor acclimation step, or an outdoor cultivation step. In the outdoor cultivation process, it is sufficient to plant the seedlings in the medium in the pot so that they can be shipped at any time.

(Outdoor acclimatization process)
In the outdoor acclimatization process, the cutting seedling 4 after the training process or after the low light / low temperature storage process is implanted in the culture medium (nursery bed) 6 to acclimatize to the outdoor environment in the atmosphere, and finally the cutting seedling 4 can be shipped. However, this step may be performed only for the types of cutting seedlings (plants) or arbitrary plants. In other words, it is most preferable to perform this outdoor acclimatization process on all types of cuttings and seedlings from the viewpoint of not giving stress to the plant due to rapid environmental changes. There is no problem even if this step is omitted depending on the kind of the plant because the cost due to the period, management, etc. is required. This is because in the present invention, the cutting seedlings after the curing process are rooted in the molding medium, so that the water absorption capacity is activated, and depending on the type of the plant, it quickly adjusts to the outdoor environment. Therefore, such a plant can be immediately transferred to an outdoor cultivation process including shipment without going through an outdoor acclimatization process. For example, the outdoor acclimatization process can be omitted for all vegetable seedlings.

Preferred examples of the outdoor acclimation step include delicate plants that are difficult to immediately acclimate (tolerate) to the outdoor environment, or relatively expensive plants.
When performing the outdoor acclimatization process, the planted seedlings 4 are planted in the culture medium 6 in a greenhouse or other facility having air conditioning equipment, and water is sprayed regularly, and the temperature and humidity in the facility are changed to the outdoor temperature every day. Move closer. In addition, if the cutting seedling 6 is planted in the culture medium 6 accommodated in the shipping pot, the subsequent cutting seedling 4 can be easily shipped.

  In the outdoor acclimatization process, the cuttings are cured and acclimatized until they can withstand the outdoor environment. The required number of days differs slightly depending on the type of cutting seedling (plant).

A demonstration experiment was conducted in which tomato cuttings were cured by three methods shown in FIG.
Example 1
A cutting medium with a molding medium formed based on the method described in FIG. 1 is cured for 4 days in a room controlled at an air temperature of 11 ° C., a water temperature of 28 ° C., a relative humidity of 95%, and a photosynthetic effective photon flux density of 10 μmol ⁻² s ^−1. After 4 days, a cutting medium with a molded medium is planted in the medium, the room temperature is 30 ° C./26° C. (light period / dark period), the relative humidity is 60% / 70% (light period / dark period), and the photosynthetic effective photon flux density is 500 μmol. ^It was controlled to ^-2 s ^-1 and sprinkled with water to such an extent that the medium did not dry.
(Comparative Example 1)
The cuttings with molded medium were cured for 4 days under the same environmental conditions as in Example 1 except that the air temperature was controlled at 10 ° C. and the water temperature at 13 ° C., and then the medium was grown for 3 days under the same environmental conditions as in Example 1. Cultivated.
(Comparative Example 2)
A cutting medium with a molded medium formed based on the method described in FIG. 1 is cured for 4 days in a greenhouse controlled at an air temperature of 26 ° C., a relative humidity of 93%, and a photosynthetic effective photon flux density of 100 μmol ⁻² s ^−1. Was cultivated in a medium for 3 days under the same environmental conditions as in Example 1.

Example 1 and Comparative Examples 1 and 2 each cultivate 5 cuttings, and after 3 days of cultivation, the cuttings with the shaping medium of Example 1 and Comparative Examples 1 and 2 were pulled out from the medium, and the rooting from each cutting Was taken and the photograph is shown in FIG. In addition, withering was not seen about all cuttings of Example 1 and Comparative Examples 1 and 2.
In addition, Table 1 shows the rooting amount of the cuttings of Example 1 and Comparative Examples 1 and 2 (average value of 5 individuals each: g / 1). At this time, the molding medium was removed from the cuttings, the roots of the cuttings were cut, and the weight was taken as the rooting amount.

  Example 1 in which the molding medium is heated in the curing process at a low temperature was rooted in the same degree as Comparative Example 2 in which the molding medium was cured at a high humidity. In 1, no rooting was observed.

An empirical experiment was conducted in which oleander cuttings were cured by the three methods shown in FIG. 5 and the rooting condition of the cuttings after the start of curing was examined.
(Example 2)
A cutting medium with a molding medium formed based on the method described in FIG. 1 is cured for 10 days in a room controlled at an air temperature of 11 ° C., a water temperature of 28 ° C., a relative humidity of 95%, and a photosynthetic effective photon flux density of 10 μmol ⁻² s ^−1. 10 days later, a cutting medium with a molding medium is implanted in the medium, the room temperature is 30 ° C./26° C. (light period / dark period), the relative humidity is 60% / 70% (light period / dark period), and the photosynthetic effective photon flux density is 500 μmol. ^The plant was cultivated for 7 days while sprinkling water so that the medium was controlled to ^-2 s ^-1 and the medium was not dried.
(Comparative Example 3)
The cuttings with molded medium were cured for 10 days under the same environmental conditions as in Example 2 except that the air temperature was controlled at 10 ° C. and the water temperature at 13 ° C., and then 7 days in the medium under the same environmental conditions as in Example 2. Cultivated.
(Comparative Example 4)
A cutting medium with a molded medium formed based on the method described in FIG. 1 is cured for 10 days in a greenhouse controlled at an air temperature of 27 ° C., a relative humidity of 95%, and a photosynthetic effective photon flux density of 100 μmol ⁻² s ^−1. Was cultivated in a medium for 7 days under the same environmental conditions as in Example 2.

Example 2 and Comparative Examples 3 and 4 each cultivate 5 cuttings, and after 7 days of cultivation, the cuttings with the molding medium of Example 2 and Comparative Examples 3 and 4 were pulled out from the culture medium, and the state of rooting from each cutting tree Was taken, and the photograph is shown in FIG. In addition, withering was not seen about all cuttings of Example 2 and Comparative Examples 3 and 4.
In addition, Table 2 shows the rooting amount of the cuttings of Example 2 and Comparative Examples 3 and 4 (average value of 5 individuals each: g / 1). At this time, the molding medium was removed from the cuttings, the roots of the cuttings were cut, and the weight was taken as the rooting amount.

  Example 2 in which the molding medium was warmed in the curing process under the low temperature control was rooted at the same level as the comparative example 4 that was cured in the high humidity, but the comparative example in which the molding medium was not warmed in the low temperature management In 3, no rooting was observed.

It is process explanatory drawing which shows the seedling raising method of the cuttings seedling of the plant of this invention. It is a figure explaining the other holding form of cuttings in the curing process in the present invention. It is a figure explaining the method which investigated the rooting condition of the tomato cutting of Example 1, the comparative examples 1 and 2. FIG. It is a photograph which shows the rooting condition of the tomato cutting of Example 1 and Comparative Examples 1 and 2. It is a figure explaining the method which investigated the rooting condition of the oleander cutting of Example 2, the comparative examples 3 and 4. FIG. It is a photograph which shows the rooting condition of the oleander cutting of Example 1 and Comparative Examples 1 and 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting tree 2 Molding medium 3 Root 4 Cutting tree seedling 5 and 6 Medium 11 Holding member 12 Curing tank 13 Curing water control means 14, 17 Low light lamp 15 Sprinkling pipe 16 Water supply source P1, P2 Plant U Seedling holding unit W Curing water

Claims (7)

A step (a) of planting cuttings collected from a plant into a molding medium; and a step (b) of holding and curing a plurality of cuttings with the molding medium vertically using a holding member,
Wherein wherein in the step (b), in which Ru Nutrient raw water which is maintained at 15 to 35 ° C. in curing tank, said plurality of cuttings was immersed to the water absorbing possible positions, and the temperature of the atmosphere leaves the cuttings are exposed A method for raising a plant cutting seedling, characterized by maintaining the temperature at a lower temperature than the curing water.   The said process (b) is the seedling raising method of the cutting seedling of the plant of Claim 1 which complete | finishes when the cutting has rooted.   In the said process (b), the temperature of atmosphere is 0-20 degreeC, The seedling raising method of the cuttings seedling of the plant of Claim 1 or 2 characterized by the above-mentioned. After the step (b), a step (c) of planting and cutting the seedlings with a molded medium raised from the curing water into a medium as a nursery, and collecting a new cutting from the plant cultivated in the step (c) A step (d) of implanting into a molding medium, and after the step (d), the steps (b), (c) and (d) are performed using the cutting medium with a molding medium formed in the step (d). The method for raising seedlings of plant cuttings according to any one of claims 1 to 3, which is repeated in this order. In any one of Claims 1-4 further equipped with the process (e) of planting the cutting seedling with a shaping | molding culture medium pulled up from the curing water after the said process (b) in the culture medium as a seedbed, and acclimatizing to an outdoor environment. A method for raising seedlings of the described plants.   After the step (b), the method further comprises a step (f) of storing the cuttings and seedlings pulled up from the curing water at a low temperature for a predetermined period in a storage where the amount of light and hydration are adjusted, and after the step (f), The method for raising seedlings of plant cuttings according to claim 5, which moves to step (e) or step (c). The planting seedling raising method of the plant cutting seedling of the plant according to any one of claims 1 to 4, wherein after the step (b), the cutting seedling with a molded medium pulled up from the curing water is planted in a culture medium as a seedbed and cultivated outdoors.