JP2002305964A - Method for forcing culture of tulip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for the forcing culture of tulip to enable the appreciation of the growth and flowering of the tulip for as long as about 50 days during the growth of the tulip. SOLUTION: This method for the forced culture of tulip comprises the dormancy breaking treatment of a tulip bulb of floral differentiated state by refrigerating the bulb in a dark place at 4±3 deg.C for a prescribed period of from 6 weeks to 9 weeks, the plantation of the dormancy broken tulip bulb in a pot, the rooting and sprouting treatment of the bulb in a dark place at 7-11 deg.C for >=1 week and the growth of the tulip by keeping the pot holding the planted tulip bulb in a warm atmosphere under natural light and/or artificial natural light until the sprout emerged from the bulb is grown to >=2 cm. The dormancy breaking period A1 (week) and the rooting and sprouting period B1 (week) satisfy the relationship of 11>A1 +(1/2B1 )>=7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forcing cultivation of tulips in which growth and flowering can be enjoyed for a long period of time from late autumn to winter and the incidence of poor growth is reduced.

[0002]

2. Description of the Related Art Tulips known as horticultural plants of the lily family include single bloom, early double bloom, Triumph, Darwin hybrid, single bloom late, lily bloom, fringe bloom, viridilla flora, Rembrandt,
More than a dozen groups are known, including parrot bloom, double bloom late birth, Kauffmaniana, Fosteriana, Greggie and others. There are dozens of varieties of tulips having different flowering periods, plant heights, flower colors and shapes, and generally bloom from early April to early May. In the bulb production of these tulips, flowering was carried out around the second day after flowering, and around June when the two-thirds of the leaves turned yellow, they were dug up to remove the stems, leaves, and roots, and were wrapped in a coat. It is known as a general bulb production method to keep it in a state until the planting time.

At present, 300 million bulbs of tulips are distributed in Japan, of which about 60% are sold as bulbs for "dry sale" such as bagging and tape winding, and the remaining about 40% are produced. It is distributed to people. 100 million balls (approximately 20%
Are not shipped due to production failure) but are used for potting and cut flowers. Potted tulips, which are marketed today for general consumers at home centers and the like, are basically refrigerated bulbs forcibly grown in a greenhouse, and are budded for indoor viewing. Usually, these products have a short viewing period of about one week for ordinary consumers, and are not attractive.
As a result, demand for tulips has been sluggish.

It has been almost impossible for horticultural enthusiasts to enjoy growing and flowering from late autumn to winter due to the general nature of tulips. In the case of pots and cut flowers, ordinary consumers are available on the market from December to April, but these are available around September after the completion of flower bud differentiation of the bulbs dug up in June. In general, after a refrigeration treatment for breaking dormancy of about 5 ° C for more than 3 months, it is planted and cultivated in an atmosphere of about 15 ° C or more in a greenhouse until bud formation or flowering just before flowering. is there. And the poor growth rate of tulip by these forcing cultivation is 10 ~
It is as high as 20%, and the flowering period is very short, about one week.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a tulip in the middle of growing which can be enjoyed for a long period of about 50 days by a general consumer from late autumn to winter by simply watering. Another object of the present invention is to provide a new tulip forcing cultivation method. Another object of the present invention is to reduce the rate of poor growth from about 10 to 20% with conventional forcing techniques to 5% or less.

[0006]

A first aspect of the present invention is a method for breaking dormancy by subjecting a flower-bud differentiated tulip bulb to a refrigeration treatment in a cool dark place at 4 ° C. ± 3 ° C. for a specific period in a range of 6 weeks to less than 9 weeks. Then, the tulip bulbs subjected to the dormancy breaking treatment are planted in a pot. When a predetermined amount of bulb planting work is completed, it is normal to enter a root and germination process in a batch (batch) operation. Is rooted and germinated for at least one week in a cool and dark place at 7 to 11 ° C., and then the pot with the tulip bulbs planted is kept in a warm atmosphere under natural light and / or artificial natural light to outside the bulb. This is a forcing cultivation method for tulips to be shipped at a stage when the number of shoots has grown to 2 cm or more, wherein the relationship between the dormancy breaking period and the rooting and germination periods is represented by the formula (1).

Equation 3] _{11> A 1 + (1 /} 2B 1) ≧ 7 (1) A 1: dormancy period (, weekly) _{B 1:} rooting, represented by the germination period (, weekly) relationship And a method for forcing cultivation of tulips, characterized by satisfying the following. Second embodiment of the present invention
Performs a dormancy breaking treatment by refrigeration treatment of flower bud differentiated tulip bulbs in a cool dark place at 4 ° C. ± 3 ° C. for a specific period of time ranging from 9 to 12 weeks, and planting the tulip bulbs subjected to the dormancy breaking treatment in a pot. After completing a predetermined amount of bulb planting work, it is usual to start rooting and germinating in a batch operation.
After the rooting and germination treatment for a predetermined period of one week or more in a cool dark place, the pots on which the tulip bulbs are planted are kept in a warm atmosphere under natural light and / or artificial natural light, and buds emerging outside the bulb are 2 cm. A forcing cultivation method for tulips to be shipped at a stage where the tulips have grown up to the above, wherein the relationship between the dormancy breaking period and the rooting and germination periods is represented by formula (2).

13.5 ≧ A ₂ + (1 / 2B ₂ ) ≧ 9.5 (2) A ₂ : Breaking period of dormancy (unit, week) B ₂ : Rooting, germination period (unit, week) The present invention relates to a method for forcing cultivation of tulips, characterized by satisfying the relationship represented by the formula Third of the present invention
The present invention relates to the method for forcing cultivation of tulips according to claim 1 or 2, wherein the warm atmosphere in which the budding is grown is 14 ° C ± 3 ° C.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As the bulbs used in the present invention, any of the above-mentioned various varieties of domestically produced bulbs and imported bulbs can be used.

[0008] The growth process of the bulb in the present invention can be roughly divided and arranged in the order of the treatment steps.
(2) Preliminary refrigeration treatment before breaking dormancy / (3) Breaking dormancy treatment /
(4) Planting treatment / (5) Rooting and germination treatment / (6) Sprout growth treatment. The feature of the present invention lies in the treatments (3) and (5). Table 1 summarizes the suitable atmosphere and temperature for the treatment, the equipment used, the treatment period, and the like.

In the present invention, the cultivated product according to the present invention is watered from the late autumn to the winter period by adjusting the atmosphere temperature and the treatment period of both treatment steps before and after planting, which are the most important in the tulip growth process, within a specific range. By cultivating so that it grows well and blooms with only the buds, the buds emerging outside the bulb are 2 cm to 15 cm, preferably 3 cm to 10 c.
It grows and cultivates to the form grown to m length, that is, the form of a sprouting pot, and is shipped.

[0010]

[Table 1]

After the tulip bulbs have been dug up, flower bud differentiation after drying progresses inside the bulbs and ends in late September even in an atmosphere under natural weather conditions, as shown in Table 1. If flower bud differentiation treatment and preliminary refrigeration treatment are performed on the flower buds, flower bud differentiation can be completed within about three weeks. Imported bulbs, especially Dutch bulbs, are mild due to the climate of the producing area affected by the Gulf Stream, and the temperature around June to August is around 17 ° C, which is suitable for flower bud differentiation. Therefore, in Japan, as it is or at 5 ° C
Bulbs refrigerated before and after are imported.

According to the present invention, the above-mentioned imported refrigerated bulbs as well as domestically produced and imported refrigerated bulbs as a refrigerated bulb by forcibly promoting flower bud differentiation are used as a starting material, and the sprouting pot tulips of the final cultivated product grow smoothly thereafter. It is based on the knowledge obtained by exploring the temperature and duration of root breaking and germination processing after breaking dormancy of bulbs, planting and planting for trial.

Since the present invention is shipped from late autumn to winter as a germinated pot tulip, the present invention is preferably carried out in the period from late July to mid-December. This is because the earliest time when imported refrigerated bulbs can be obtained is from the beginning of mid-September, and in the case of domestic bulbs, the earliest available time is in late June. Since late July. In addition, in the practice related to the sprouting growth treatment at a later time than mid-December, the cultivation and flowering time of the sprouting pot tulip according to the present invention will soon reach the market for forcing cultivation products in pots (pots) in a conventional greenhouse. This is because one of the important objects of the present invention is lost because it is not only close to or overlapping with the time but also close to the time when the tulips with the bulbs planted in the flowerbed or planter produce buds.

The dormant breaking refrigerated bulb of the present invention has a flower bud length of 8 to 10 mm inside the bulb.
It is important that the cells grow to the extent that the temperature of the cold atmosphere is lower than 1 ° C. (4 ° C.-3 ° C.), and the growth is suppressed, and the temperature exceeds 7 ° C. (4 ° C. + 3 ° C.). At temperature, the break of dormancy is insufficient and subsequent growth is impaired.
It is best to use bulbs in the range of 3 ° C ± 3 ° C, more certainly at 5 ° C ± 1 ° C to break dormancy. For example, when the bulb after flower bud differentiation is broken dormant in a cold atmosphere below 1 ° C. (even if it does not fall below 0 ° C.), the growth of the flower bud is suppressed and the bulb does not bloom due to freezing failure. Not only does the number of bulbs increase, the flowering rate decreases, and poor growth occurs frequently. In addition, when flowering occurs, poorly flowering tulips with no volume are obtained. However, failure to break dormancy is insufficient, so that the plant height does not increase during the growing period, or the growth may be stagnant even if the leaves are expanded, or the growth may be slowed down even if the plants grow.

[0015] In addition, as a period of the dormancy breaking process for growing smoothly without causing the above-mentioned obstacle, a minimum of 6 weeks is required in the first aspect of the invention, and a minimum of 9 weeks is required in the second aspect of the invention. If bulbs shorter than this period are used, failure due to insufficient dormancy may be hindered. Therefore, in the present invention, the length of the flower buds inside the bulb is surely reduced by at least 8 to 10 mm by the above-mentioned period treatment. It is important to grow back and forth. In addition, when the period of breaking dormancy by refrigeration is longer than 12 weeks, failure due to excessive refrigeration occurs, the buds that have emerged outside the bulbs after planting are poor, lack volume, and hinder growth thereafter. Therefore, it is important to keep refrigeration within the above-mentioned period at the longest.

In the planting treatment according to the present invention, an appropriate pot (small pot made of synthetic resin) is filled with culture soil, and the dormantly broken bulb is implanted in a state where the upper part of the bulb protrudes from the surface of the culture soil layer as described above. However, it is particularly preferable to plant the bulb in a state where the upper part of the bulb protrudes from the surface of the culture soil layer by about 1/3 to 1/4. And, as the culture soil, the same soil as that used by bulb-producing farmers or the culture soil for bulb plants is also produced and sold, so any of these can be used, but humus with good water retention as fertilizer It is preferable to use a mixture of these and the like as appropriate. The manual planting of the refrigerated bulbs in the pot is sufficient, but automatic mechanical planting (potting machine) or the like may be used.

In the present invention, since the final cultivated product is a sprouting pot tulip which is in the process of growing, it is difficult to grow up to flowering only with watering at the hands of a general consumer. In addition to reducing the incidence, it is necessary to reduce the incidence of poor growth even during the period in which the general consumer is watching. In the production of cut flowers and pots, they are shipped to the market just before flowering or when buds occur.They are sorted out during production and cultivation by the trader and defective products are excluded.Only good products are sold in the market. It was only a problem inside, not a table problem.

In the present invention, in order to reduce the incidence of poor growth as much as possible, the treatment period for breaking dormancy of refrigerated bulbs is from 6 weeks to 1 week.
The two-week bulbs are further divided into two groups, a group of less than 9 weeks and a group of 9 weeks or more, and the rooting and germination treatment after planting of these two groups is strictly managed and cultivated, so that the temperature difference is severe. It was possible to forcibly cultivate a sprout pot tulip that hardly causes poor growth in the hands of ordinary consumers even in an atmosphere. In addition, by performing the rooting and germination treatment of the two groups having different refrigeration periods separately by changing the temperature and the period individually, the defective growth rate at the time of forcing cultivation according to the present invention can be reduced. Compared to the case of forcing by refrigerated bulb planting in a greenhouse above 15 ° C, such as during cut flower production, there is a significant decrease of 5%.
In addition to being reduced below, by selecting and excluding defective products at the time of shipment of the product of the present invention, even if a general consumer grows and grows with normal watering, the growth is reduced so that almost no poor growth occurs.

In the case of the refrigerated bulb in the range of 6 weeks or more and less than 9 weeks according to the first aspect of the present invention, 7 days after the planting treatment,
Rooting and germination are performed in a temperature range of from 11 ° C. to 11 ° C. (9 ° C. ± 2 ° C.) while supplementing a slightly insufficient dormancy break. Then, this processing period is within a period adjusted in close relation to the dormancy breaking processing period, that is, a root that is satisfied by the following equation:
It must be within the germination period.

11> A ₁ + (1 / 2B ₁ ) ≧ 7 (unit: week) where A ₁ is a refrigeration treatment period and 6 ≦ A ₁ <9. B ₁ represents rooting, a germination period is 1 ≦ _{B 1.} The rooting and germination treatment after the planting treatment is performed at 7 ° C.
When the treatment is carried out at a low temperature of 6 ° C. or less, the dormancy is sufficiently broken, but the rooting rate is extremely slow, and it becomes difficult to grow a strong root within 4 weeks. In addition, when the rooting and germination treatment temperature is set to a temperature higher than 11 ° C., the dormancy break is not sufficiently supplemented and is exposed to a relatively high temperature.
It is thought that the growth will be stopped, but the roots that have rooted are poor and hinder the subsequent growth, which contributes to increase the incidence of poor growth.

[0020] Claim 1 rooting in the invention, germination period B ₁ represents, since kept to lower the required dormancy processing marginal required period 6 weeks period by refrigeration, overlaps at 7 ° C. to refrigeration temperature close At a slightly higher temperature, the dormancy is supplemented and the period required for growing strong roots is added.
Therefore, when using a required refrigeration period A ₁ of lower 6 weeks bulbs as a raw material, as it is clear from Equation 1 described above, since B ₁ is not obtained desired rooting in a week,
At least two weeks is the required period. That is, rooting against B ₁ represents bulbs less than 9 weeks refrigeration period A1 from 6 weeks in claim 1 invention, germination and grown to ensure that the desired form, also in the subsequent growth not final cultivation products only It is necessary to have a period during which the pot tulip is a strong sprouting pot that does not cause poor growth. Then, B ₁ is substantially satisfied at 3 weeks, and carried out over 5 weeks in excess of 4 weeks was not observed any difference on even growth effects, since only thereby unnecessarily prolong the duration of the forcing, or 4 weeks There is no point in becoming. For these reasons, rooting of claim 1 invention, germination period B ₁ represents, in view of the forcing, moreover in the form also satisfactory rooting state while supplementing the dormancy somewhat scant is Optimally, it takes 2-3 weeks.

In the second invention, rooting and germination are carried out separately from the first invention. Breaking of dormancy is almost completed in a refrigeration period of 9 weeks.
10 if grown in a greenhouse under the sunshine around ℃
% To about 15%, which is to be avoided. Therefore, the invention of claim 2 does not need to supplement the break of dormancy, but the optimal rooting temperature of refrigerated bulbs in a cool dark place is 9 ° C to 13 ° C (11 ° C ± 2 ° C).
The processing period of 1 week to 3 weeks is set slightly shorter than that of the first invention. The upper limit is 3
Although it is not limited to weeks, it does not make much sense to make it longer. That is, the rooting and germination of the second invention is closely related to the dormancy breaking period as in the first invention,
It must be within the rooting and germination period that is satisfied by the following formula.

13.5 ≧ A ₂ + (１ ／ B ₂ ) ≧ 9.5 (unit: week) However, A ₂ is a refrigeration treatment period and 9 ≦ A ₂ ≦ 12. B ₂ is rooting, a germination period is 1 ≦ _{B 2.}

According to the second aspect of the present invention, the fear of shortage of the dormancy breaking process of the first aspect of the invention is excluded by extending the refrigeration period by 1 to 3 weeks, but the rooting and germination periods are compared with the first aspect of the invention. The goal is to reduce it by about half. According to the present inventor's knowledge on tulip forcing cultivation for many years, 9 ° C is generally insufficient for breaking dormancy, but this temperature is the rooting temperature for bulbs refrigerated at 4 ° C ± 3 ° C for 9 weeks or more. In order to grow strong roots in rooting and germination treatments, the temperature is 0.5 weeks at this temperature (3 days to 3 days).
In the case of 4 days), at least one week is necessary due to the shortage, and in the period of more than 3 weeks, the effect on growth cannot be obtained in spite of extending the period. In addition, if the rooting and germination temperature is set to 14 ° C. or higher, which is higher than 13 ° C., since this temperature is also a temperature at which sprouted shoots grow rapidly when placed in sunlight, poor rooting and poor germination frequently occur. Therefore, it is important to keep the temperature at 13 ° C. or less. Claim 2 invention has been found based on the above-mentioned findings, but considering that it is forcing cultivation, rooting and germination are 9 to 13 ° C, preferably 10 ° C ± 1 ° C, Optimally, the processing period is about 10 days ± 2 days, which is around 1.5 weeks.

The sprouting growth treatment, which is the final step of the first and second aspects of the present invention, is carried out in a greenhouse by exposing the pot after rooting and germination to sunlight (under natural light). It may be performed under the same artificial light as the light. In the budding growth treatment, it is desirable that the pot is placed on a tray or the like, and that watering is carried out in the form of a shower from the top of the bulb planting pot in the initial stage, and then water is injected into the tray. The temperature in the greenhouse is preferably maintained at 14 ° C. ± 3 ° C. by the heat of a boiler or the like, and buds are 2 cm or more, preferably 2 cm to 15 cm long depending on the tulip variety and the processing conditions of the previous process. Since the growth speed is different, the processing period cannot be fixed, but the processing is terminated while observing the growth of budding. However, in any case, the processing can be completed within a period from one week to two weeks.

The temperature control of the refrigerator used before and after planting in the present invention can be controlled to approximately ± 1 ° C. with respect to the set temperature, although it depends on the sensitivity of the thermostat. The range of 4 ° C. ± 3 ° C. can be refrigerated at 1 ° C. to 3 ° C. if the set temperature is 2 ° C., and 5 ° C. to 7 ° C. if the set temperature is 6 ° C.

The potted tulip of the final cultivation product suitable for shipment according to the present invention is a pot-planted tulip in which the bud that has emerged on the pot is grown to at least 2 cm, preferably 3 cm or more, and the tulip grows to this extent. If so, the quality of the subsequent growth can be predicted sufficiently. It is provided to the general horticultural lovers at the early stage of growth as much as possible, and it is intended to prevent poor growth even with watering alone. Within, preferably, about 10 cm. By shipping in such a state, it is possible to view the flowers for a long time by planting them in flower beds or planters or planting them in pots. Also, since the sprout pot according to the present invention can withstand some snow cover and can grow, it is suitable for outdoor growth watching,
It is preferable to use it in the west of Kanto, but also in the north of Tohoku, planters and potted plants can be used indoors when a large amount of snow falls, and even when there is some snowfall in the sunshine, it is possible to enjoy satisfactory breeding. . In the Christmas season, a large amount of cut flowers are available on the market. However, it is very easy to use a tulip of the present invention to allow a planter or a potted plant to view a tulip in full bloom.

[0026]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited thereby.

Example 1 (corresponding to claim 1) Three varieties of different flower colors (Christmas Dream, Linfanda Mark,
Tulip bulbs of 300 domestic balls (Ile-de-France) were placed in a refrigerator and subjected to the treatments of the first step and the second step shown in Table 1 over three weeks, thereby completing flower bud differentiation. In late July, the temperature of the refrigerator was set to 3 ° C. ± 1 ° C., and the dormancy was broken down for 6 weeks. Then, it was taken out of the refrigerator in early September (September 9), and planted in a small plastic pot (pot having an internal volume of about 150 ml) filled with the culture soil in advance, with the bulb upper part protruding about 1/4.

Of these, 150 bulbs were immediately returned to the refrigerator with the pot immediately after planting, and subjected to rooting and germination at 9 ° C. ± 1 ° C. for 3 weeks. As a result, equation (1) for calculating the period is

A ₁ + (1 / 2B ₁ ) = 7.5, which is within the period satisfying the present invention. Each pot after rooting and germination is placed on a tray for each flower color, transferred to a steel house reinforced vinyl greenhouse, and showered at the top under sunlight in a warm atmosphere of 16 ° C to 18 ° C. Thereafter, water was injected into the tray to perform a germination growth treatment. The pot of 150 balls according to the present invention was observed to be in a good growing state except that the buds of all the pots grew to about 8 cm in about 8 days and 4 to 5 pots of poor growing products were generated. 150 pots of the forcing cultivation product according to the present invention were transferred to Yokohama City on October 8, leaving 45 pots, excluding 5 pots of poorly grown products, planted in outdoor flower beds and only watered appropriately. And observed the growth and flowering status. as a result,
Almost all of them bloomed around November 25 in late autumn, and during the flowering period, it was possible to view around 60 days around the end of December after a severe cold season. And it was recognized that the cultivation viewing period reached 113 days when counted from the time of planting on the flowerbed.
In addition, the remaining 45 pots of the cultivated product of the present invention are planted in a slightly large pot or planter, and a relatively sunny bay window or the like indoors in the Niigata prefecture's Shimoetsu district where the average temperature during the day and night is about 15 ° C. In the vicinity, the state of growth and flowering was observed only by appropriate watering. As a result, almost all flowered around November 15, and the flowering period was 14 days.

Comparative Example 1 The remaining 150 spheres, which were the same as in Example 1 from flower bud differentiation to breaking dormancy and planting, were returned to the refrigerator after planting for comparison and 13 ° C. ± 1 ° C. different from the conditions of the present invention. For 3 weeks. Each pot after rooting and germination
Germination growth treatment was performed in the same manner as in Example 1. But,
Rooting and germination treatment at 13 ° C. ± 1 ° C.
In the case of 0 pot, the phenomenon of breaking dormancy is insufficient, and the growth of the shoots is irregular, so that the lengths of the shoots are irregular, and
It was observed that 18 pots of poor growing products such as poor growing sprouts and no volume were generated.

Example 2 (corresponding to claim 2) Dutch imported bulbs (variety Lean Fanda Mark) which had been refrigerated at 5 ° C. ± 1 ° C. for 7 weeks were obtained in early October.
After obtaining 100 bulbs again in refrigerator at 5 ℃ ± 1 ℃ for another 2
The refrigerated bulbs were refrigerated for a total of 9 weeks (A ₂ ) and planted in pots on October 21, 1999 in the same manner as in Example 1. Then transfer to refrigerator at 12 ℃ ± 1 ℃ 7
Rooting and germination treatment were applied for a day. Rooting this case, germination period _{B 2} is the formula (2)

The adjustment was made so as to satisfy 13.5 ≧ A ₂ + (１ ／ B ₂ ) ≧ 9.5. The pots after the rooting and germination treatment were placed on a tray and subjected to the germination growth treatment as in Example 1. However, this treatment was carried out in a greenhouse greenhouse atmosphere of 15 ° C. ± 1 ° C., and all the pots grew to about 10 cm in bud length in about 14 days. It was not too much. In the same manner as in Example 1, the flowers were planted on the flowerbed in Yokohama City, and the status of vegetation and flowering was observed only by watering. As a result, all flowers bloomed on or before January 25, 2000, and the number of flowering days was about 50 days. The number of days was found to be about 131 days. In addition, there was snowfall on February 8 of the same year, and although the stems and leaves did not break, the snowfall was thin but the volume of flowering was firm after natural snow melting.
It was presented until the beginning of the month, and it was confirmed that it can be grown firmly not only in the severe winter season but also in the severe cold season.

Comparative Example 2 For the purpose of comparison, when rooting and germination were performed at 15 ° C. to 17 ° C. in the same manner as in Example 2 except that the temperature was 15 ° C. to 17 ° C., poor rooting and poor growth due to poor germination occurred. The rate became very high, and about 15% or more of defective products were generated.

[0032] Examples 3 to 8 types of bulbs, domestic processing start timing, temperature and the period of _{A 1} and _{A 2} of the refrigeration process, planting date, rooting after planting treatment, the temperature of _{B 1} and _{B 2} of germinated -Tables collectively showing Examples 3 to 8 in which the combination of the period, the relation of the formula (1) or the formula (2), the temperature of the germination process, the number of days, the shipping date, the flowering date, the flowering date, the number of ornamental days, etc. were changed. 2 is shown.

Comparative Examples 3 to 10 The growth conditions of Comparative Examples 3 to 10 in which the treatment conditions in Examples 3 to 8 were carried out under the conditions deviating from the present invention as shown in Table 3 are shown in Table 3. .

In each of the above Examples and Comparative Examples, the warm atmosphere temperature in the greenhouse was heated by flowing hot water into an iron pipe installed in the greenhouse. If the temperature was too high, the warm water flow was reduced. Stop and shade the house, and / or
Alternatively, hot air was released outside the house by opening windows of the house, etc., and the set temperature was maintained. Also, in the present invention, a house heating machine or a medium-temperature (15 ° C. to 18 ° C.) package cooling machine commercially available from Mitsubishi Electric Corporation, Nepon Corporation, or the like is provided to automatically perform cooling and heating. It is more preferable to carry out the budding growth treatment in a greenhouse house.

[0035]

[Table 2]

[0036]

[Table 3]

[0037]

(1) According to the cultivation method of the present invention, dormancy breaking, rooting, germination and sprouting growth treatment suitable for the growth of tulips are artificially performed almost as designed and forcing cultivation. Therefore, the cultivated product can be grown only by watering, even in the late fall to winter season, even when the season is out of season. The growing failure rate is remarkably reduced not only at the time of cultivation but also at the time of raising the general consumer's hand, and it is possible to provide a growing sprouting pot tulip suitable for planting flower beds, planters, and pot plants. (2) The shipping date of the cultivated product of the present invention is set to 12
When the setting was made up to the beginning of the month, since the total cultivation period can be calculated backward by the formulas (1) and (2), the product could be shipped almost exactly on schedule.

Claims (3)

[Claims] 1. The method of claim 1 wherein the tulip bulbs that have undergone flower bud differentiation are treated at 4 ° C. ±
A dormancy breaking process is performed by refrigeration treatment for a specific period in the range of 6 weeks or more and less than 9 weeks in a cool dark place at 3 ° C., and the tulip bulbs that have undergone the dormancy breaking process are planted in pots, and then the pots are cooled to 7-11 ° C. 1 in a cool dark place
After the rooting and germination treatment for a predetermined period of at least a week, the pot in which the tulip bulbs are planted is kept in a warm atmosphere under natural light and / or artificial natural light until the buds emerging outside the bulbs become 2 cm or more. A forcing cultivation method for tulips to be shipped at the stage of growth, wherein the relationship between the dormancy breaking period and the rooting and germination periods is expressed by the following equation (1): 11> A ₁ + (1 / 2B ₁ ) ≧ 7 (1) A ₁ : Dormancy breaking treatment period (unit, week) B ₁ : Rooting and germination treatment period (unit, week) . 2. Tulip bulbs that have undergone flower bud differentiation at 4 ° C. ±
Performing a dormancy breaking process by performing a refrigeration process in a cool dark place at 3 ° C. for a specific period of 9 to 12 weeks, and planting the tulip bulbs that have undergone the dormancy breaking process in a pot;
Then, after this is subjected to rooting and germination treatment for a predetermined period of one week or more in a cool and dark place at 9 to 13 ° C., the pot in which the tulip bulbs are planted is kept in a warm atmosphere under natural light and / or artificial natural light. 2 buds outside the bulb
cm, which is a forcing cultivation method of tulips to be shipped at a stage of growing to at least cm, wherein the dormancy breaking period and rooting,
The relationship with the germination period is expressed by the following equation (2): 13.5 ≧ A ₂ + (１ ／ B ₂ ) ≧ 9.5 (2) A ₂ : Dormancy breaking period (unit, week) B ₂ : A forcing cultivation method for tulips, characterized by satisfying a relationship represented by a rooting and a germination treatment period (unit, week). 3. The warm atmosphere in which the budding is grown is 14 ° C.
The method of forcing cultivation of tulips according to claim 1 or 2, wherein the temperature is ± 3 ° C.