JP3774865B2 - Cultivation and production of sugarcane seedlings - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for cultivating and producing shoots of sweet potato seedlings.
[0002]
[Prior art]
Conventionally, as a sweet potato cultivation, (a) a stock cultivation method performed by germinating a remaining stub after cutting a mature stalk, (b) a so-called crop obtained by cutting a mature stalk every two upper and lower nodes Two-node seedling new planting cultivation methods are well known in which two node seedlings are newly planted at each season (spring-January to April, summer-August to November) and then germinated.
[0003]
In addition, (c) a side shoot growing stem of a required length obtained by continuously causing a sprouting phenomenon in which a side bud germinates by excising the top of the treetop, that is, a side bud that has grown until the number of developed leaves reaches the required number. The side shoot growth stem of the required length obtained by repeatedly excising the top of the treetop, which is above the 10th section, is used as a seedling (side branch seedling) and is also referred to as a side branch seedling transplanting cultivation method in which this is planted in this field. A cultivating method is disclosed in JP-A-8-280244.
[0004]
[Problems to be solved by the invention]
In the method of stock cultivation in (a), since the same stub is used for several years and germination, growth and cutting are repeated, the germination rate is inferior with age, the stems are aged and weakened, the yield, sugar content Is also reduced.
[0005]
The new planting method for 2-node seedlings in (b) requires a great deal of labor not only for the collection of 2-node seedlings, that is, seedling production, but also for planting itself. Under the influence of weather conditions or soil conditions, it is usually 50 to 60%, and even a seedling that has once germinated and grown may die.
Furthermore, although the sweet potato-growing farmer has to use 10% or more of the harvested amount for each season to collect the bisection seedlings for the next period, the harvest is actually reduced accordingly.
[0006]
It is recognized that the side branch seedling transplanting cultivation method (c) almost eliminates the above-described drawbacks of the cultivation methods (a) and (b).
However, in the cultivation method of (c), since the top of the top of the side buds grown from the tenth node of the side buds grown until the number of developed leaves reaches the required number is repeatedly removed, Increases the number while sequentially branching and expanding, and is radially dispersed with respect to the mother stem. Therefore, it takes time and effort to collect it.
[0007]
The method for cultivating and producing a branch of the present invention for sweet potato seedlings is a seedling branch corresponding to the side branch seedling in the side branch seedling transplanting cultivation method of (c) above, that is, a secondary, tertiary or quaternary branch shoot. A large number of bunches are concentrated on the nodes of the mother stem, so that the seedling branches can be collected efficiently without much effort.
[0008]
[Means for Solving the Problems]
The cultivating and producing method of the present invention sweet potato seedlings according to claim 1 has the following constitution.
(1) Cultivate sweet potato to be used as a mother stem, and when it reaches the required stem length, the upper stem including the apical growth point is excised and the remaining lower stem leaves are removed to remove the remaining stem a To do.
(2) When the primary buds 3 that germinate at the nodes of the mother stem a grow until the first to seventh expanded leaves 4 to 10 extend from the eighth to fourteenth buds, that is, have at least seven expanded leaves. When growing into a primary branch shoot b, the primary branch shoot b is cut at the fifth node portion and halfway between the polymerization portions of the fourth bud and the fifth bud, and is located in the polymerization portion. The primary branch stem upper stem b 'including the growth point is excised, so that only the primary branch stem base b "remains in the growing portion of the primary sprout 3 of each node of the mother stem a.
(3) Secondary buds that sprout at the node of the primary branch base b ″ are grown on the secondary branch c, and the secondary branches c are concentratedly clustered on the primary branch base b ″ to form secondary branches. Make it a stem.
(4) The primary branch stem base b ″ is cut at the growing portion of the mother stem a to cut the entire secondary branch stem mass from the mother stem a, and the secondary branch stem c is removed from the secondary stem mass. Separate each of them with a bud group and a root tissue part attached.
[0009]
The method for cultivating and producing the branch shoots for sweet potato seedlings of the present invention according to claim 2 has the following configuration.
(1) Cultivate sweet potato to be used as a mother stem, and when it reaches the required stem length, the upper stem including the apical growth point is excised and the remaining lower stem leaves are removed to remove the remaining stem a To do.
(2) When the primary buds 3 that germinate at the nodes of the mother stem a grow until the first to seventh expanded leaves 4 to 10 extend from the eighth to fourteenth buds, that is, have at least seven expanded leaves. When growing into a primary branch shoot b, the primary branch shoot b is cut at the fifth node portion and halfway between the polymerization portions of the fourth bud and the fifth bud, and is located in the polymerization portion. The primary branch stem upper stem b 'including the growth point is excised, so that only the primary branch stem base b "remains in the growing portion of the primary sprout 3 of each node of the mother stem a.
(3) When the secondary buds that germinate at the node of the primary branch base b ″ grow into the secondary branch c having 5 to 6 unfolded leaves, the secondary branch c And cut in the middle of the polymerized portion of the fourth and fifth sprouts, and excise the upper secondary stem c ′ including the apical bud growth point located in the polymerized portion. Leaving the secondary branch base c ″ at the primary branch base b ″ of each node of the stem a;
(4) The third buds that germinate in the fifth and subsequent nodes of the secondary branch base c ″ are grown into tertiary branch stems d having a maximum of five developed leaves, and the tertiary branch stems d are formed into the primary branches. Concentrate clustering on the branch stem base b ″ via the secondary branch stem base c ″ to form a tertiary branch stem mass.
(5) The primary branch stem base b ″ is cut at the growing portion of the mother stem a to cut the entire tertiary branch stem mass from the mother stem a, and the tertiary branch stem d is separated from the tertiary branch stem mass. Separate with bud base and root tissue part attached.
[0010]
The cultivating and producing method of the present invention sweet potato seedlings according to claim 3 has the following constitution.
(1) Cultivate sweet potato to be used as a mother stem, and when it reaches the required stem length, the upper stem including the apical growth point is excised and the remaining lower stem leaves are removed to remove the remaining stem a To do.
(2) When the primary buds 3 that germinate at the nodes of the mother stem a grow until the first to seventh expanded leaves 4 to 10 extend from the eighth to fourteenth buds, that is, have at least seven expanded leaves. When growing into a primary branch shoot b, the primary branch shoot b is cut at the fifth node portion and halfway between the polymerization portions of the fourth bud and the fifth bud, and is located in the polymerization portion. The primary branch stem upper stem b 'including the growth point is excised, so that only the primary branch stem base b "remains in the growing portion of the primary sprout 3 of each node of the mother stem a.
(3) When the secondary buds that germinate at the node of the primary branch base b ″ grow into the secondary branch c having 5 to 6 unfolded leaves, the secondary branch c is And cut in the middle of the polymerization part of the fourth bud and the fifth bud, and the secondary stem upper stem c ′ including the apical growth point located in the polymerization part is excised, The secondary branch base c ″ is left at the primary branch base of each node of a.
(4) The tertiary buds that germinate in the fifth and subsequent nodes of the secondary branch base c ″ are grown into tertiary branch stems d having 5 to 6 expanded leaves. Cutting at the middle of the polymer part of the fourth bud and the fifth bud, and cutting the upper third stem c 'including the apical growth point located in the polymer part, , Leaving the tertiary branch base at the secondary branch base c ″.
(5) The fourth buds that germinate in the fifth and subsequent nodes of the third branch base are grown into the fourth branch stem d having a maximum of five unfolded leaves, and the fourth branch stem d is grown into the primary branch. 4. Concentrate clustering on the stem base b ″ through the secondary branch stem base c ″ and the tertiary branch stem base to form a quaternary branch stem mass.
(6) The primary pedicle base b ″ is cut at the growing portion of the mother stem a to cut the entire quaternary branch shoot mass from the mother stem a. Separate each of them with a bud group and a root tissue part attached.
[0011]
The present invention according to claim 4 cultivates sweet potato used as mother stalk a, and when it reaches the required stem length, leaves the first to twelfth nodes, the upper part thereof, that is, the top buds 4. The method for cultivating and producing a branch of a sweet potato seedling according to claim 1, wherein the upper stem including the growth point is excised and the remaining lower stem leaves are removed to obtain a mother stem a.
[0012]
The present invention according to claim 5 cultivates a sweet potato used as a mother stem by planting a two-node seedling 1 obtained from a mature potato stem. 6. A branch for sweet potato seedling according to claim 1, 2, 3 or 4 It is a method for cultivating stems.
[0013]
In the above, as a sweet potato for use as the mother stem a, it is most preferable to plant a 2-node seedling obtained from a mature stem, and when the stem grows to about 300 cm, the upper stem is excised, Setting the side stem as mother stem a is suitable for growing and collecting higher branch shoot seedling h having a high degree of survival in this field because mother stem a is appropriately matured. In this case, cutting the stem with a stem height of 120 cm is suitable for performing various subsequent operations in view of the average height of the worker.
[0014]
When the primary branch stalk b growing from the primary bud 3 of the mother stalk a is grown until there are at least 7 unfolded leaves, the primary branch shoot upper stem b ′ including its apical bud growth point is excised, By leaving the primary branch stem base b ″ in the mother stem a, secondary buds can be efficiently germinated on the primary branch stem base b ″ and can be grown to the secondary branch stem c.
[0015]
When the secondary branch c was grown until the number of developed leaves reached 5 to 6, the secondary branch upper stem c ′ including the apical growth point thereof was excised, and the primary branch base b ″ was cut. When the secondary branch base c ″ is allowed to remain, and the tertiary branch stem d that grows from the tertiary sprouts of the secondary branch base c ″ is grown until the number of unfolded leaves is 5 at most, By excising the upper branch of the tertiary branch including its apical growth point and leaving the tertiary branch base at the secondary branch base c ″, or by growing the fourth branch in the same manner The primary branch stem base b ″ remaining on the mother stem a is a high-order branch stem which is the tertiary branch stem d or the fourth branch stem, and a concentrated clustering so as to form a higher branch stem mass e by them. It can be made to.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Below, embodiment of the cultivation production method of the branch shoot for seedlings of this invention sweet potato is demonstrated, and the transplant cultivation method of the branch shoot seedling obtained from the branch shoot for the seedling is demonstrated.
[0017]
[Cultivation of sweet potato used as mother stem]
Two-node seedlings 1 obtained by cutting mature stems every two upper and lower nodes are placed horizontally at intervals of about 50 cm in the ridges 2 formed with a width of about 140 cm and a depth of about 25 cm (FIG. 1). Along with the required covering soil, the plant is planted, germinated from the 2-node seedling 1 and cultivated for about 7 months until the stem height grows to about 300 cm (FIG. 2).
[0018]
The stem length of about 300 cm is taken into consideration, for example, the height of the worker, so that it is easy to carry out the work after cutting, for example, by cutting at a stem length of about 120 cm, leaving the first to twelfth clauses. Then, the upper part, that is, about 180 cm of the upper stem including the apical growth point of sweet potato is excised. Then, the cut portion is sterilized and a so-called de-leafing process is performed to remove the remaining leaves.
As a result, a mother stem a in which generation of pests is prevented and sunlight is sufficiently irradiated to each node is obtained (FIG. 3).
[0019]
[Growing primary and secondary branches]
Mother stem a has 2 to 6 axillary buds on average, 5 to 5 days after the upper stem excision and exfoliation treatment because the apical bud growth point is cut and the apical dominance is broken. Germinate. In this example, the case where five primary buds 3 in total, one each in sections 4, 6, 8, 10 and 12, was shown (FIG. 4).
[0020]
When the primary buds 3 of each of the above nodes grow until the first to seventh expanded leaves 4 to 10 extend from the 8th to 14th buds, that is, when they grow to the primary branch stem b having at least seven expanded leaves. (FIG. 5), the primary branch shoot b is cut at the middle part of the polymerization part of the fourth bud and the fifth bud, and the top bud growth point located in the polymerization part. The primary pedicle upper stem b 'is cut off, and only the primary pedicle base b "consisting of the first to fifth sections remains in the growing portion of the primary sprout 3 of each section of the mother stem a ( FIG. 6).
[0021]
When the primary branch b has about 7 unfolded leaves, the sixth, seventh, sixth, and so on sections are still concentric in the fifth section, in other words annual rings. It is located in a concentric circle like
By the way, the apical bud growth point of the primary branch shoot b exists in the fifth node part, but it cannot be visually judged from the outside because it is covered with buds. However, as a rule of thumb, it has been confirmed that the apical bud growth point can be excised by cutting at the midpoint between the fourth and fifth sprouts.
In addition, in general, sugarcane branches and stems have shoots and roots for the first time in the fifth and subsequent sections.
[0022]
By excising the primary stem upper stem b ′, each of the sixth, seventh, eighth,... Nodes extends between the nodes (FIG. 7), and each of the fifth to eighth nodes is four in total. Germination of secondary buds of
When the secondary axillary buds of each node are extended to 5 to 6 expanded leaves and grown into secondary branch stems c as in the case of the primary axillary 3 (FIG. 8), the secondary branches The stem c is cut at an intermediate point between the 4th and 5th sprouts, which is the fifth node portion, and includes the top sprout growth point located in the superposed portion. Thus, the secondary branch base c ″ composed of the first to fifth nodes remains in the established part of the secondary buds of each node of the primary branch base b ″ (FIG. 9).
[0023]
[Training of tertiary branches]
The secondary branch stem base c ″ is formed by removing the upper stem c ′ of the secondary branch stem including the apical bud growth point so that the sixth, seventh, eighth,... Two tertiary axillary buds are sprouting in each of the 6th and 7th nodes.
In the same manner as in the case of the primary buds 3 or the secondary buds, the third buds of each node are grown until the maximum number of developed leaves is 5 and grown on the tertiary branch stem d.
As described above, in the entire mother stalk a of this example, 5 × 4 × 2 = 40 tertiary branch stalks d grow, and they are the fifth, sixth, eighth, and tenth of the stalk a. , 12, more specifically, where eight tertiary branches d are concentrated in the primary branch base b ″ growing on each node via the secondary branch base c ″. (FIG. 10).
[0024]
[Collecting tertiary branch stems]
In this example, the above-mentioned tertiary branch d is used as a target higher branch, and this is collected. The primary branch base b ″ is used as an epiphytic portion of the above-mentioned nodes of the mother stem a. The whole higher-order branch stalk e having eight tertiary branches and stems d is cut off from the mother stem a by cutting with (FIG. 11).
This higher order branch shoot mass e can be stored for about 10 days before planting into a collective seedling raising device to be described later at a low temperature of about 8 ° C. In this example, the storage at a low temperature is possible. Eight tertiary branches and stems d were cut individually from the higher branch and stem mass e after the above.
For the separation of the tertiary branch stalk d, for example, after dividing the secondary branch stalk base c ″ on which the two tertiary branch shoots d are formed (FIG. 12), the secondary branch stalk base c ″ is divided. It is important that the shoot and root tissue portion 11 existing in the node (after section 5) is attached to the tertiary branch base d ″ side of the tertiary branch stem d to be separated (see FIG. 5). 13).
As described above, 5 × 4 × 2, that is, 40 high-order branch stems, which are target tertiary branch stems d, can be collected from one mother stem a.
[0025]
Note that there are cases where 5 × 6 × 4, that is, 120 can be collected from a single stem, and 5 × 4 × 2, that is, 40 in this example is an average. Things can be said.
Further, in order to increase the number of higher branches collected from one mother stem, the fourth branch is grown and collected in the same manner as the growth up to the third branch d in the above example. In this case, 5 × 4 × 2 × 2 or 80, or 5 × 6 × 4 × 2 or 240 can be collected.
[0026]
[Third branch stem classification and leaf cutting as pre-nursery management]
A large amount of higher-order branch stems d collected from a large number of mother stems according to the above procedure is bred into higher-order branch stem seedlings with roots necessary for survival and self-sustaining growth by transplanting to this field. However, as the seedling pretreatment, first, each of the leaves having the same number of leaves, that is, 1 leaf, 2 leaves, 3 leaves, 4 leaves, and 5 leaves is divided in advance.
This is because, in the subsequent seedling management, when trying to raise seedlings with the same single seedling raising equipment with different numbers of leaves mixed, the one with few leaves becomes shaded and photosynthesis is not enough. This is in order to avoid the death of the material after a significant delay.
[0027]
Next, each tertiary branch stalk d divided as described above is pruned at a stem height of 15 to 20 cm (FIG. 14).
This is to prevent early leaf rooting by preventing the leaves from interfering with the seedling during raising seedlings. Therefore, this pruning process is indispensable especially for those with a large number of leaves.
[0028]
[Raised seedlings]
In order to root the higher branch stems, which are tertiary branch stems d collected from the mother stem, into roots necessary for growth and growth in the field as described above, to obtain higher branch stem seedlings with elongated roots. The inventors conducted experiments using various seedling raising devices.
As a result, among the three kinds of collective seedling raising devices described above, a large number of accommodating portions are formed by a large number of paper tubes, and each of the accommodating portions can be separated (Japanese sugar beet sugar production) (Registered trademark “Paper Pot”, manufactured by Co., Ltd.), and one is a paper tube 12 having a diameter of 3 cm and a height of 10 cm, 12 in a vertical row, 22 in a horizontal row, and 264 in total. The collective seedling raising device f thus obtained was found to be optimal for the seedling raising of this example.
[0029]
Therefore, each paper tube 12 of the collective seedling raising instrument f is filled with soil without fertilizer mixed, that is, without fertilizer, and the tertiary branch d is inserted to a depth of about 3 cm and planted therein. (FIG. 15).
In this case, the third branch stem d having the same number of leaves is inserted and planted in one collective seedling raising device f so that different numbers of leaves are not mixed.
Also, for arranging the seedling raising equipment f in the seedling raising house g, grouping is made for each of the seedling raising equipment f in which the third branch stalk d having the same number of leaves is inserted and planted, and the interval between the gathering seedling raising equipments f is set. They were arranged at least about 15 cm (FIG. 16).
[0030]
The temperature in the nursery house g is maintained at 25 to 30 ° C. so as to avoid a sudden temperature change, and irrigation is performed immediately after the arrangement of the gathering and raising equipment f in the nursery house is completed. From the second day, it was performed for about 10 minutes every hour only during the daytime, and no irrigation at night.
Thereby, the third branch shoot d was rooted 4 to 7 days after planting in the spring and 3 to 5 days after planting in the summer.
From the 10th day of planting in the spring and after the 7th planting in the summer, it was sufficient to irrigate the leaves so that the leaves did not wither.
[0031]
As described above, rooting is relatively fast because no fertilizer is mixed in the cultivated soil and no fertilizer is applied after planting. After rooting, the subsequent elongation of the roots was further promoted by applying the required fertilization once a week.
[0032]
In the spring period, the seedling period is 4 weeks, and in the summer period, it is 3 weeks. The above-mentioned tertiary branch stalk d has 4 leaves for 1 leaf and 4 to 5 leaves for 2 leaves. 3 leaves have 5-6 leaves, 4 leaves have 5-6 leaves, 5 leaves have 6-7 leaves, and these are All of them grew to higher-order pedicle seedlings h that formed so-called root pots in which a root was formed by extending a large number of branched roots 14 to the main root 13 (FIG. 17).
[0033]
[Transplant]
When transplanting to the main field, about 1 week before the transplantation (therefore, 3 weeks after planting in the spring and 2 weeks in the summer), the collective seedling device f is taken out from the nursery house g, Acclimation of the next branch shoot seedling h, that is, the higher branch shoot seedling h is adapted to environmental changes. As a result, the seedlings can be easily and reliably settled on the main field.
[0034]
Furthermore, three days before transplanting to the main field, the seedlings are trimmed and arranged so that the seedling height is approximately 25 to 35 cm (FIG. 18), thereby enabling smooth automatic transplanting to the main field by a dedicated transplanter. To be prepared.
However, when the seedling height is pruned to about 25-35 cm as described above, the higher branch shoot seedling h that has grown to a height at which the first developed leaves are almost eliminated will survive even if transplanted to the main field. Therefore, the higher branch shoot seedling h is not cut and removed, and is prepared for use as a supplementary seedling as it is, except for one collective seedling raising instrument f containing it.
[0035]
The special transplanter is a tractor pulling type, and is equipped with a seedling row separation mechanism, a seedling individual separation mechanism, a seedling planting mechanism, a grooving mechanism, and the like that are automatically driven as it travels.
In the transplanting, the paper tube 12 of the collective seedling raising instrument f is batch-separated in units of rows, that is, every 22 rows by the seedling row separation mechanism, and is separated separately by the seedling individual separation mechanism and sent to the seedling planting mechanism. The above-mentioned paper cylinder 12 together with the higher-order branch shoot seedling h is provided on the bottom of the groove 15 having a groove width of 75 to 80 cm and a depth of about 25 cm. It was carried out by planting continuously with the interval between the stocks and with the upper part of the paper tube 12 exposed about 2 cm (FIG. 19).
[0036]
The survival rate of the higher branch shoots h transplanted in this way was 95% or more. This is a significant improvement compared to the conventional two-node seedling cultivation method, where the germination rate itself is usually only 50-60% due to maturity of the stems, weather conditions or soil conditions. It is clear that it can contribute to the improvement of yield.
[0037]
In addition, as described above, the shallower planted state in which about 2 cm of the upper part of the paper tube 12 is exposed without being embedded in the soil, and the planting depth is constant, so that the stem close to the root is The branching from the portion, that is, bunquet, increased by about 10% compared to the case of the conventional cultivation method, which further contributed to the improvement of the yield.
[0038]
【The invention's effect】
As is clear from the above description, according to the present invention, a large number of branches and stems are concentrated on the nodes of the stems (mothers), so that it is not necessary to collect the branches and stems much. It is also possible to perform efficiently, and for raising seedlings in the nursery house, it is necessary to have a set of seedling raising equipment that is inserted into a seedling raising instrument for each branch and stem with the same number of leaves and that contains the same number of leaves and branches. In order to prevent rooting by initially avoiding fertilization, a branch stem seedling with almost the same seedling height and a large number of branch roots necessary for survival is obtained. be able to.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram of a state in which 2-node seedlings are planted to grow sweet potatoes used as mother stems.
FIG. 2 is a front view of a sweet potato grown to such an extent that it can be used as a mother stem.
FIG. 3 is an explanatory diagram of a mother stem obtained by excising the required length of the upper stem including the top bud growth point of sweet potato and leaving leaves up to the 12th node and stripping the leaves.
FIG. 4 is an explanatory view showing a state in which five primary branches are grown on each of the fourth, sixth, eighth, tenth and twelfth stems of the mother stem.
FIG. 5 shows that the primary branch stem of the above is located at the top bud growth point in the fifth node portion and in the polymerization portion of the fourth bud and the fifth bud, and has 7 to 8 unfolded leaves. It is explanatory drawing of the state grown so far.
[Fig. 6] Cut the primary branch stem of the same as above at the midpoint of the polymerized portion of the fourth and fifth sprouts, cut the upper stem of the primary branch including the apical growth point, and the base of the primary branch It is explanatory drawing which shows the state which left only the mother stem.
[Fig. 7] Fig. 7 is an explanatory view showing a state in which the sixth to eighth nodes, which are the fifth and subsequent nodes, of the primary branch stem base portion are expanded.
FIG. 8 is a perspective view showing a state where four secondary branches are grown in each of the fifth to eighth nodes of the primary branch base of the above.
[Fig. 9] The middle branch of the fourth and fifth sprouts in the same manner as in the case of the primary branch, with the same secondary branch that has grown to 5 or 6 leaves. FIG. 3 is an explanatory view showing a state where the upper side stem of the secondary branch including the apical bud growth point is excised and only the secondary branch base is left at the primary branch base.
[Fig. 10] In the state where four tertiary branch stems in each of the four secondary branch stem bases of the same as above are grown to a maximum of 5 leaves with a total of 8 tertiary branches. FIG. 5 is a perspective view showing a state in which a higher-order branch and stem mass is formed on a mother stem on which the primary branch and stem base is growing.
FIG. 11 is a perspective view of the higher branch shoot mass in a state separated from the mother stem.
FIG. 12 is an explanatory diagram of a state in which the higher-order branch stalk is cut into individual tertiary branches (ie higher-order branches).
FIGS. 13A and 13B are front views of the separated tertiary branches, wherein (1) shows a four-leaf tertiary branch and (2) shows a five-leaf tertiary branch. FIG.
FIG. 14 is a front view of a tertiary pedicle cut to a height of 15 to 20 cm. (1) shows a four-leaf tertiary branch and (2) shows a five-leaf tertiary branch.
FIG. 15 is an explanatory diagram showing a state where a four-leaf tertiary branch stem is inserted and planted in a collective seedling raising device.
FIG. 16 is an explanatory view of an arrangement state in a nursery house of a collective seedling raising device in which a tertiary branch is inserted and planted.
FIG. 17 is an explanatory view showing a rooting state of a higher branch shoot seedling grown in a transplantable state.
FIG. 18 is an explanatory diagram of a higher-order branch shoot seedling showing a state in which a predetermined leaf cutting process is performed in a state of being planted on a collective seedling raising instrument immediately before transplanting.
FIG. 19 is an explanatory diagram showing a state of transplantation of higher branch shoot seedlings into the main field.
[Explanation of symbols]
a mother stem b primary branch b 'primary branch upper stem b "primary branch base c secondary branch c' secondary branch upper stem c" secondary branch base d tertiary branch stem d "tertiary branch base e Higher branch shoot lump f Collective seedling device in which many paper cylinders that can be separated from each other in a honeycomb arrangement (registered trademark “Paper Pot”, manufactured by Nippon Sugar Sugar Co., Ltd.)
g Nursery house h Higher branch stem seedling 1 2 node seedling 2 groin 3 primary primary bud 4 1st developed leaf 5 2nd developed leaf 6 3rd developed leaf 7 4th developed leaf 8 5th developed leaf 9 6th developed leaf 10 7th developing leaf 11 shoot base and root tissue part 12 paper tube 13 main root 14 branch root

Claims (5)

(1) Cultivate sweet potato to be used as a mother stem, and when it reaches the required stem height, the upper stem including the apical growth point is excised, and the remaining lower stem leaves are removed and the mother stem is removed. To do,
(2) When the primary buds that germinate in the nodes of the mother stem grow until the first to seventh expanded leaves extend from the eighth to fourteenth buds, that is, grow into primary branch stems having at least seven expanded leaves. When the primary branch is cut, the primary branch is cut at the fifth node portion and halfway between the fourth and fifth sprouts, and includes the top sprout growth point located in the overlap portion. Excising the upper stalk, thereby leaving only the primary branch stalk base at the root of the primary buds of each section of the mother stalk,
(3) Growing the secondary buds that sprout at the nodes of the primary branch base to grow into secondary branch stems, and concentrating the secondary branch stems on the primary branch base to form a secondary branch lump,
(4) By cutting the primary branch base at the root of the mother stem, the entire secondary branch chunk is cut off from the mother stem, and secondary branch stems are sprouted from the secondary branch chunk. A method for cultivating and producing shoots of sweet potato seedlings, characterized by separating the base and root tissue parts. (1) Cultivate sweet potato to be used as a mother stem, and when it reaches the required stem height, the upper stem including the apical growth point is excised, and the remaining lower stem leaves are removed and the mother stem is removed. To do,
(2) When the primary buds that germinate in the nodes of the mother stem grow until the first to seventh expanded leaves extend from the eighth to fourteenth buds, that is, grow into primary branch stems having at least seven expanded leaves. When the primary branch is cut, the primary branch is cut at the fifth node portion and halfway between the fourth and fifth sprouts, and includes the top sprout growth point located in the overlap portion. Excising the upper stalk, thereby leaving only the primary branch stalk base at the root of the primary buds of each section of the mother stalk,
(3) When the secondary buds that germinate at the root of the primary branch stem grow into secondary branch stems having 5 to 6 unfolded leaves, the secondary branch stem is the fifth node portion and Cut between the 4th and 5th sprout polymerization parts and cut the upper branch of the secondary branch stalk including the apical growth point located in the polymerization part. Leaving a secondary branch base at the primary branch base;
(4) A tertiary bud that germinates at a node of the secondary branch base is grown into a tertiary branch having a maximum of five leaves, and the tertiary branch is added to the primary branch base. To make a tertiary branch stalk lump by concentrating through
(5) Cutting the primary branch base at the root of the mother stem to cut the entire tertiary branch stalk from the mother stem, and removing the tertiary branch from the tertiary branch stalk. Cultivation and production method of shoots for seedlings of sweet potato, characterized by separating the tissue part. (1) Cultivate sweet potato to be used as a mother stem, and when it reaches the required stem height, the upper stem including the apical growth point is excised, and the remaining lower stem leaves are removed and the mother stem is removed. To do,
(2) When the primary buds that germinate in the nodes of the mother stem grow until the first to seventh expanded leaves extend from the eighth to fourteenth buds, that is, grow into primary branch stems having at least seven expanded leaves. When the primary branch is cut, the primary branch is cut at the fifth node portion and halfway between the fourth and fifth sprouts, and includes the top sprout growth point located in the overlap portion. Excising the upper stalk, thereby leaving only the primary branch stalk base at the root of the primary buds of each section of the mother stalk,
(3) When the secondary buds that germinate at the root of the primary branch stem grow into secondary branch stems having 5 to 6 unfolded leaves, the secondary branch stem is the fifth node portion and Cut between the 4th and 5th sprout polymerization parts and cut the upper branch of the secondary branch shoot containing the apical growth point located in the polymerization part. Leaving a secondary branch base at the branch base;
(4) A tertiary bud that germinates at a node at the base of the secondary branch stem is grown into a tertiary branch having 5 to 6 unfolded leaves. Cut in the middle of the polymerization part of the buds and the fifth buds, and the upper stem of the tertiary branch including the apical bud growth point located in the polymerization part is excised. Leaving the base,
(5) The fourth buds that germinate in the fifth and subsequent nodes of the third branch stem base are grown into fourth branch stems having a maximum of five unfolded leaves, and the fourth branch stem is the primary branch stem base. Intensively clustering through the secondary branch base and tertiary branch base to form a quaternary branch mass,
(6) The primary pedicle base is cut at the root of the mother stem to cut the entire quaternary branch stalk from the mother stalk, and the quaternary branch stalk is sprouted from the quaternary branch stalk. A method for cultivating and producing shoots of sweet potato seedlings, characterized by separating the base and root tissue parts. When cultivating sweet potato to be used as a mother stalk and when it reaches the required stem height, the first part to the twelfth part are left and the upper part thereof, that is, the upper stem including the apical bud growth point is excised. 4. A method for cultivating and producing a branch stem for sweet potato seedlings according to claim 1, 2 or 3, wherein the remaining lower stem leaves are used as mother stems. The method of cultivating and producing a branch shoot for sweet potato seedlings according to claim 1, 2, 3 or 4, wherein the sweet potato used as a mother stalk is cultivated by planting 2-node seedling obtained from a mature pod .

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