JP2016111949A - Tomato's two-branched seedling and creation method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tomato's two-branched seedling in which growth and equality of two lateral branches can be improved.SOLUTION: A tomato's two-branched seedling is provided in which decapitation is performed between the major leaf second leaf and the major leaf third leaf, and leaf picking of the major leaf second leaf is performed so that the major leaf first leaf is left without leaf picking. A lateral branch grows from the leaf-stalk base part of the remaining major leaf first leaf and a lateral branch grows from the leaf-stalk base part of the major leaf second leaf decapitated to be a two-branched seedling.SELECTED DRAWING: Figure 1

Description

  The present invention relates to two tomato seedlings and a method for producing the seedlings.

  In recent years, in the production of tomatoes, the scale of management has been expanded as farmers grow older and the number of successors is growing. Farmers, for example, purchase seedlings that have been bred and concentrate on cultivation as much as possible to improve production efficiency.

  On the other hand, as it is called a seedling half-cropping, the subsequent growth and production are greatly influenced by the quality of the seedling.

  Among them, from the viewpoint of saving seedling costs, saving labor, securing production, etc., various tomato seedling seedlings using various tomato seedling shoots (side branches) have been proposed. However, in the conventional methods, the growth and alignment of the two side branches are both poor, and there is a problem in applying the method to large-scale production such as cell-molded seedlings.

  As a conventional technique, for example, a side branch that grows from the stalk base of the three leaves of the main leaf that is pinched between the third leaf and the fourth leaf of the main leaf and has good growth (for example, the main leaf first A method is known in which two leaf and third leaf petiole bases or two main leaf first and second leaf petiole bases are stretched to make two tailors (Non-patent Document 1). However, in this technique, there is a problem that the generation of the side branch is delayed or the growth is likely to be delayed, and it is necessary to pick out a side branch that does not grow well among the three side branches that are generated later, which is troublesome.

  In addition, a technique has been devised in which all of these true leaves are picked after the three true leaves are left behind (Non-patent Document 1). However, in this case, since there is no leaf blade part that mainly generates plant hormones or promotes photosynthesis that promotes the entire growth of seedlings, the growth of seedlings is delayed and the growth of roots tends to be poor.

  Also known is a technique of pinching directly above the cotyledons and growing two side branches each generated from the two cotyledon bases to make two tails, and by applying this technique, side branches generated from the cotyledon bases are also known. It is also known that by grafting after growing, the number of days for raising seedlings is shortened as compared with the case of pinching after grafting (Patent Document 1). However, in general, in the method of pinching just above the cotyledons, the two side branches may not come out in the same way (Non-Patent Document 1).

JP, 2014-030368, A

“Now, it ’s interesting to make two pinch of tomatoes” Monthly Contemporary Agriculture September 2012 issue, published by Rural and Mountain Fishing Village Cultural Association, p159-170

  An object of the present invention is to provide a two-tomato tomato seedling capable of improving the growth and alignment of two side branches.

  The two tomato seedlings according to the embodiment of the present invention are pinched between the second leaf of the main leaf and the third leaf of the main leaf, the second leaf of the main leaf is plucked, and the first leaf of the main leaf is not plucked. It is left behind.

  The method for creating a two-tomato tomato seedling according to an embodiment of the present invention includes culling between the second leaf of the main leaf and the third leaf of the main leaf, defoliating the second leaf of the main leaf, It is left without pruning.

  According to the embodiment of the present invention, it is possible to provide two tomato seedlings with good growth and alignment of two side branches.

Schematic diagram of tomato seedlings showing pinching and foliage positions according to one embodiment Schematic diagram of two tomato pinching seedlings showing the state after pinching and leafing as above Schematic diagram of the seedlings with two tomatoes showing the state where the buds are generated Schematic diagram of two tomato seedlings showing the state of growing side branches The schematic diagram which showed the creation step of the two tomato tailoring graft seedling concerning one embodiment Photograph of cell-shaped seedlings with two tomatoes in Example 1-1 Photographs of grafted seedlings of Example 4 and Comparative Example 4

  Hereinafter, matters related to the implementation of the present invention will be described in detail.

[Two tomato seedlings]
The two tomato seedlings according to this embodiment are pinched between the second leaf and the third leaf of the main leaf, the second leaf of the main leaf is plucked, and the first leaf of the main leaf is left without being plucked. It has been done. FIG. 1 is a schematic diagram of a tomato seedling according to an embodiment, and FIG. 2 is a schematic diagram after the pinching and leaf cutting.

  In this specification, the “main leaf” means a leaf that is not a cotyledon and that develops from the stem after the development of the cotyledon, and when counting, the first leaf and the main leaf in order from the lower leaf. Count as 2nd leaf, 3rd leaf of true leaf. As shown in FIG. 1, since a tomato is a compound leaf, each true leaf consists of a some leaflet. The term “cotyledon” refers to the first leaf that emerges after germination, and two dicotyledonous tomato plants.

  “Tiping” refers to a treatment for growing side branches from the base of leaves below the cutting position by intentionally cutting off the growth point (main stem or main branch) of the seedling. “Lefting” refers to a process of cutting the true leaf from the stem. The “side branch” refers to a branch that grows from the base of the main leaf (or cotyledon), and is a concept that includes axillary buds (side buds) that are buds generated from the base. "Two tailored seedlings" refers to seedlings that have been tailored so that two side branches grow to become the main stem (main branch) by pinching, and only seedlings with two side branches already growing Instead, it is a concept including a pinching seedling before at least one side branch (an axillary bud) is generated. The “node” refers to the location where side branches (buds) occur. When counting, the first node (the root of the first leaf of the main leaf), the second node (the root of the second leaf of the main leaf), etc. count. “Flower (flower)” refers to a flower that originates from the main stem (in the case of two tailored seedlings, the side branch tailored as the main stem). When counting, the first (stage) and second (Stage) Count as Hanafusa. When this becomes a fruit, it is called a fruit bunch.

  In the present embodiment, the variety of tomato is not particularly limited, and various varieties can be used. Preferably, for example, tomato varieties with excellent sugar content, harvestability, and disease resistance, specifically, Momotaro Peace, CF Momotaro Haruka, Momotaro Natsumi, Momotaro 8, Momotaro Sunny, Momotaro Gift, Momotaro Select, Momotaro Grande, Flutica However, it is not limited to these. Tomato is an annual plant of the solanaceous family, and its scientific name is Solanum lycopersicum L.

  In the present embodiment, the above-mentioned pinching and leaf removal are performed on tomato seedlings. Such seedlings can be obtained by sowing seeds of the above-mentioned tomato varieties on a soil and growing them according to a conventional method. The cultivation soil is not particularly limited, and for example, seedling cultivation soil such as tanemaki cultivation soil (Takii Seed Seed Co., Ltd. product), TM-1 (Takii Seed Seed Co., Ltd. product) can be used. The fertilizer may be mixed with brackish water and applied as appropriate according to the seedling raising time and seedling growth.

  As shown in FIGS. 1 and 2, pinching is performed between the second leaf and the third leaf. That is, the main stem between the stalk base of the second leaf of the main leaf and the stalk base of the third leaf of the main leaf is cut. In addition, the defoliation is performed on the second leaf of the main leaf. On the other hand, the first leaf of the main leaf is left without leafing. Therefore, in the seedling after pinching and leaf removal, the main leaf is only the first leaf. The cotyledon is not particularly limited, but it is usually sufficient to leave it without removing it.

  In the present specification, the “petiole” refers to a handle that attaches the leaf blade to the main stem with a part of the leaf. The “petiole base” refers to a portion where the main leaf (or cotyledon) is formed on the main stem, and is also referred to as a root portion or leaflet of the main leaf (or cotyledon).

  The time of pinching and defoliation may be after the time when the length that can be pinched is formed in the main stem between the second leaf and the third leaf of the main leaf (hereinafter referred to as the earliest pinching time). However, in consideration of shortening of the seedling raising period, it is preferable to carry out by the time when the fourth leaf of the main leaf develops (the fourth leaf stage of the main leaf). That is, it is preferable to perform pinching and leaf removal on young seedlings from the earliest pinch time to the fourth leaf stage of the main leaf. More preferably, the pinching and defoliation are performed from the earliest pinching period to the third leaf stage of the main leaf (the period when the third leaf of the main leaf has developed), and more preferably, the pinch and defoliation are performed. It is to be. By performing pinching at an early stage in this way, side branches can be generated early, and the seedling raising period can be shortened. Here, the earliest pinching time is when the main stem length between the petiole base of the second leaf of the main leaf and the petiole base of the third leaf of the main leaf preferably reaches 2 to 8 mm, more preferably When it reaches 3 to 5 mm, if there is an interval of this level, pinching is possible.

  It is preferable to carry out pinching and defoliation at the same growth stage of the seedling. In that case, it may be carried out simultaneously, or either one may be carried out first. Good. Preferably, the pinching and defoliation are performed simultaneously. Here, simultaneous implementation is not limited to a mode in which pinching and leaf removal are performed by a single cutting processing operation. For example, a mode in which pinching is performed on one seedling and leafing is performed on the seedling as it is is performed simultaneously. It can be said. In this embodiment, as shown in FIG. 1, the pinching position and the leaf picking position are close to each other. Therefore, it is preferable to perform pinching and leaf removal by a single cutting process, and labor saving can be achieved.

  The pinching position is not limited as long as the growth point of the main stem can be removed. For example, the main stem is preferably 1 to 6 mm above the stem of the second leaf of the main leaf, more preferably 2 to 4 mm above the main stem. Part.

  In the defoliation of the second leaf of the main leaf, it is preferable to cut the second leaf of the main leaf from the main stem, leaving at least a part of the petiole. More preferably, it is cut by leaving 1 to 6 mm of the petiole, and more preferably, it is cut by leaving 2 to 4 mm of the petiole. Thereby, leaf cutting can be performed without damaging the petiole base where buds are generated.

  According to the present embodiment, since the centripetation is performed between the second leaf and the third leaf of the main leaf, the centripetation between the third leaf and the fourth leaf of the conventional main leaf is performed earlier. It can be pinched and productivity can be improved. Moreover, since the second leaf of the main leaf is removed as well as the pinching, light is sufficiently applied not only to the petiole base of the second leaf of the main leaf that has been plucked but also to the base of the first leaf of the main leaf that has not been plucked. be able to. By performing pinching and leaf removal in this manner, the amount of light received (light) such as sunshine for the young seedlings is appropriately adjusted, so that the remaining stalk base of the first leaf of the main leaf and the stalk base of the second leaf of the main leaf that has been defoliated. It is possible to increase the probability that side branches will grow. In addition, the lengths of the two side branches are adjusted so that they are aligned.

  According to this embodiment, since the growth of the side branch from the cotyledon base is suppressed, the generation of an extra side branch is suppressed, and the trouble of picking up the extra side branch can be saved.

  In general, in the production of tomatoes, it is desirable that the first flower floret does not rise much (node position). However, according to this embodiment, as shown in Example 3 below, It is possible to reduce the node position of the dandelion.

  FIG. 3 is a schematic diagram showing a stage in which axillary buds are generated from the stems of the first leaf and the second leaf of the main leaf in the two tomato seedlings according to one embodiment, and FIG. It is a schematic diagram which shows the state which grew. According to the present embodiment, two tomato seedlings with good growth and alignment of the two side branches are thus obtained.

  Therefore, the tomato two-tailored seedling according to one embodiment has side branches grown from the petiole base of the first leaf of the main leaf and side branches grown from the petiole base of the second leaf of the main leaf that has been defoliated. Such two tailored seedlings grow side branches from the petiole base of the first leaf of the main leaf and grow side branches from the petiole base of the second leaf of the main leaf that has been plucked by continuing the seedling and leaf raising after the above-mentioned pinching and leafing. Can be created.

  In the present embodiment, after the above-mentioned pinching and leaf-cutting, it may be shipped before the side branch is generated. That is, the tomato two-tailored seedling according to another embodiment is a pinching seedling before a side branch (an axillary bud) is generated from at least one of the stalk base of the first leaf and the stalk base of the second leaf of the main leaf. Preferably, it is a pinching seedling before side branches are generated from both the petiole base of the first leaf and the petiole base of the second leaf of the main leaf. Thus, by shipping at the stage before the side branch is generated, the seedling raising period until shipment can be shortened.

[Two tomato tailored cell molding seedlings]
This embodiment is preferably applied to cell-molded seedlings that are grown on a cell tray. That is, the tomato two-tailored seedling according to an embodiment is a cell-molded seedling grown in a cell tray.

  Conventional tomato seedlings are mainly produced in a seedling pot. However, since the seedling pot is large, the distribution cost is large, the seedling period is long, and the productivity is inferior. Therefore, two tomato seedlings grown in cell trays are desired, but it has been difficult to meet this demand with the prior art. This is considered to be due to the fact that in the above-described conventional technique in which only pinching is performed, when the number of seedlings per area is large, the petiole base is not sufficiently exposed to light, so that the occurrence and growth of side branches are likely to be delayed. On the other hand, in this embodiment, by performing pinching and leaf removal as described above, even when there are a large number of seedlings per area as in a cell tray, light can be sufficiently applied to the petiole base, and it is grown and aligned. Good side branches can be generated. Therefore, it is possible to supply two tomato seedlings in the cell tray, thereby reducing distribution costs and improving productivity.

  In this specification, “cell-molded seedling” means, for example, that one side (or diameter) of the container is 1.6 to 5.0 cm (preferably 1.9 to 4.5 cm) and the height is 1.6 to 9. The shape of 0.0 cm (preferably 3.0 to 5.0 cm) is a seedling grown using a container similar to a pot, and is also referred to as a plug seedling. This container is called a “cell”, and is formed by connecting for handling. This connected cell is called a “cell tray”. Since the cell-molded seedlings grown in the cell tray are generally shipped as they are, the cell-molded seedlings grown in the cell tray according to this embodiment are prepared in the cell tray and the two tomatoes arranged in each cell. A seedling may be provided.

  When creating cell seedlings with two tomatoes, the seeds of tomato varieties are first sown in a cell tray filled with culture medium, preferably growing between the earliest pinching period and the fourth leaf stage of the main leaf. Grow until stage. Next, for the young seedlings grown in the cell tray, culling between the second leaf and the third leaf of the main leaf, the second leaf of the main leaf is defoliated, and the first leaf of the main leaf is left without defoliation, The above-mentioned pinching and leaf removal are performed.

  As a cell tray as a seedling container to be used, for example, the long side is about 590 mm, the short side is about 300 mm, and the cell (hole) is 50 holes or more per container (tray), preferably 72 holes or more, more preferably There are 128 holes or more, more preferably 200 holes or more. The upper limit of the number of cells is not particularly limited, and may be, for example, 288 holes or less.

In order to improve the production efficiency of the two tailored seedlings, it is preferable that the two tailored seedlings can be produced in a tray having as small a cell as possible. If the number of cells is small and the seedlings are not dense, it is possible to grow two side branches by simply pinching between the second leaf and the third leaf of the main leaf. When many seedlings are densely packed, it is difficult to grow two side branches satisfactorily only with the pinching. On the other hand, according to the present embodiment, two side branches can be grown well even in a cell tray in which seedlings are densely formed by pinching and leafing as described above. From this point of view, the number of seedlings growing in the cell tray is 400 or more per 1 m ² (72 holes or more in the cell tray of the above size), which enhances the effect of leafing the second leaf of the main leaf and produces It is preferable for improving the efficiency. More preferably, it is 700 or more, more preferably 1000 or more per 1 m ² . Although the upper limit of the number of seedlings is not particularly limited, it is preferably 1700 or less per 1 m ² , more preferably 1500 or less.

  As with the above-described embodiment, the tomato two-tailed cell molded seedlings created in this way continue to grow seedlings after pinching and leaf removal, so that the leaf base of the first leaf and the leaf base of the second leaf of the main leaf. Each side branch can be grown to form a cell-molded seedling having two side branches, and may be shipped at that stage. Moreover, after pinching and leaf removal, it may be shipped before the side branch is generated, that is, side branches (buds) are generated from at least one of the petiole base of the first leaf and the second leaf of the main leaf. It may be shipped as a cell-shaped pinching seedling made with two tomatoes before being processed.

[Two tomato tailored graft seedlings]
The present embodiment may be applied to a graft that uses the above-mentioned two tailored seedlings as a spike. That is, the two tomato tailored seedlings according to an embodiment are grafted seedlings using the above-mentioned pinching and leafing seedlings as spikelets. Here, “grafting” refers to joining and cultivating hogi, which is the above-ground part, and rootstock, which is the underground part, and “grafting seedling” is the seedling that has been joined and erected in this way. Say.

  Examples of rootstock varieties include various plants that can be grafted with the tomato varieties, for example, solanaceous plants such as eggplant and bell pepper, and are not particularly limited. Preferably, the rootstock cultivar is preferably a tomato cultivar and a close plant, more preferably a tomato. Preferred examples of rootstock tomatoes include varieties such as B-barrier, boranci, green guard, and green save. These rootstock varieties have strong disease resistance against soil-borne diseases, and have the fertilization capacity necessary for two-tailored cultivation, and can maintain the plant vigor.

  In the following description, a case where the above-described pinching and leaf-cutting are performed after grafting will be described, but it is easily understood by those skilled in the art that pinching and leaf-cutting may be performed before grafting.

  The time for grafting and the appropriate time vary depending on the management conditions and seasons at the time of seedling, the cell tray size to be used, the type of soil, etc., but it is about 17 to 28 days after sowing of the tomato panicle variety. It is preferable that the internode length between the cotyledons of the rootstock cultivar sowed and the first leaf of the main leaf reaches 10 mm or more. In addition, the hogi variety is preferably when the plant height is 4 to 5 cm, the number of leaves is 2 to 3 true leaves, and the stem diameter immediately below the cotyledons is about 1.8 to 2.0 mm.

  A conventional method can be used as the grafting method, and examples thereof include joint joining and split joining. Preferably, the stems and rootstock stems are combined after being cut diagonally or horizontally, and held together with a graft support (“New Gardening Nursery System”, Japan Facility Horticultural Association, 1994, p144-161). “New vegetable gardening handbook”, supervised by Sadao Nishi, Yokendo Co., Ltd., 2001, p161-172).

  The grafting work differs depending on the grafting method to be used. For example, in the case of mating, (1) cutting of the rootstock, (2) insertion of the grafting support into the rootstock, (3) cutting of the headstock, (4 ) It can be advanced in the work process of inserting and joining to the support tool of hogi. The cutting positions of rootstock and hogi are not particularly limited, but are usually under the cotyledon or between the cotyledon and the first leaf of the cotyledon, and can be applied in combination. For example, both rootstock and hogi may be cut under the cotyledon, both rootstock and hogi may be cut between the cotyledon and the first leaf, and either rootstock or hogi The other side of the cotyledon may be cut between the cotyledon and the first leaf.

  After grafting, Hogi cannot absorb moisture temporarily until it settles on the rootstock, so it is necessary to suppress transpiration from the leaf stems and perform appropriate temperature and humidity management. Since devices capable of accurately controlling illuminance and the like are widely used, it is preferable to use such devices in terms of efficiency of work management. The approximate number of days for dressing is 3-7 days.

  After grafting in this manner, the seedlings and leaf cutting are carried out on the hogi after raising the seedlings and raising seedlings as necessary. After that, by continuing the seedling as necessary, two tomato tailored grafted seedlings can be obtained.

  FIG. 5 is a schematic diagram showing the creation stage of a two-tomato tailored grafted seedling according to one embodiment. After cutting the rootstock under the cotyledon as shown in FIG. 5 (a), cutting the hogi under the cotyledon as shown in FIG. 5 (b), and then grafting as shown in FIG. 5 (c). Join rootstock and hogi using a support. Then, as shown in FIG.5 (d), with respect to the safflower part in the grafted seedling, the second leaf of the main leaf and the third leaf of the main leaf are plucked, the second leaf of the main leaf is plucked, and the main leaf The above pinching and defoliation of leaving the first leaf without defoliation is performed.

  In the case of the grafted seedlings with two tomatoes according to the present embodiment, the effects such as the growth and alignment of the two side branches are obtained in the same manner as in the above embodiment, and the characteristics of the hogi and rootstock, for example, It is a seedling that takes advantage of cultivation characteristics such as high sugar content, quality such as disease resistance, and yield.

  Such two tailored grafted seedlings can also be applied to cell-molded seedlings grown in cell trays, and production efficiency can be increased, which is preferable. That is, the tomato two-tailed grafted seedling according to one embodiment may be a tomato two-tailored cell-shaped grafted seedling grown in a cell tray. Also in this case, as in the above embodiment, by continuing seedling after pinching and leaf removal, side branches are grown from the petiole base of the first leaf and the second leaf of the main leaf, It can be a cell-molded grafted seedling having side branches, and may be shipped at that stage. Alternatively, it may be shipped after the pinching and leaf removal and before the side branch is generated, that is, the side branch (bud) from at least one of the petiole base of the first leaf and the second leaf of the main leaf. You may ship as a tomato two tailoring cell molding grafting pinching seedling before generating.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

[Example 1]
After filling seedling culture soil (“TM-1” manufactured by Takii Seed Co., Ltd.) into a 200-hole seedling cell tray, seeding with tomato seeds (variety: CF Momotaro Haruka), covering the soil, and germinating according to conventional methods After germination, seedlings were raised in a glass greenhouse. As the cell tray, a cell tray having a side of 2.5 cm and a height of 4.4 cm and having 1111 seedlings per 1 m ² (seeding date: August 28) was used. 27 days after seeding (September 24), the interval between the petiole base of the second leaf of the main leaf and the petiole base of the third leaf of the main leaf was about 3 to 5 mm.・ Leafing was carried out.

  In Example 1-1, a pinch that cuts the main stem between the second leaf of the main leaf and the third leaf of the main leaf (third lobe pinching), and leaves the second leaf of the main leaf about 2 to 4 mm. The defoliation (second defoliation) was performed at the same time. Tipping and leaf removal were performed at once using a razor blade. The first leaf of the main leaf was left unleaved. In Comparative Example 1-1, only the third lower leaf pinching was performed. In Comparative Example 1-2, in addition to the above third leaf picking, leaf cutting (first leaf picking) is performed to cut the main leaf first leaf leaving about 2 to 4 mm of its petiole, and the second leaf of the main leaf is cut. Left behind. In Comparative Example 1-3, both the first and second leaf picking were performed along with the third leaf picking.

  16 days after pinching and leaf removal (October 10), the length of side branches (side branch length) grown from the first and second nodes was measured, and the incidence of side branches from the cotyledon base was measured. Moreover, the diameter of the main stem between the first leaf and the cotyledon was measured. The measurement result is an average value for 15 strains of seedlings in which two side branches were generated.

  The results are as shown in Table 1, and in Example 1-1, side branch growth from the 1st node (the leaf stalk base of the first leaf of the main leaf) and the 2nd node (the stalk base of the second leaf of the leaf). But both of them were growing. In addition, the incidence of side branches from the cotyledon base was suppressed. On the other hand, in Comparative Example 1-1 in which only the third lobe pinectomy was performed, the growth of the side branch from the first node was remarkably weak, and the growth of the side branch from the second node was also inferior to that of Example 1-1. It was. In Comparative Example 1-2 in which the third lobe pinectomy and the first lobe pinectomy were performed, no side branch was observed from the cotyledon base, but the growth of the side branch was observed in Example 1-1. It was lower than that of Example 1-1. In Comparative Example 1-3 in which the third lobe pinching and the first and second lobe pinching were combined, the growth of the side branches was lower than in Example 1-1 in both the first and second nodes. In addition, the side branch occurrence rate from the cotyledon base is high, and it cannot be said to be a preferable double stand specification. In addition, Comparative Example 1-3 is thinner than the other Examples and Comparative Examples, and the overall growth of the stem is slow, so that the growth of the root is insufficient. It was also a problem as a cell-molded seedling in that it was difficult to come off. Regardless of the example and comparative example, side branches were generated from the first and second nodes over time, that is, the side branch generation rate was 100%.

  FIG. 6 is a photograph showing an enlarged main part of one of the two tomato tailored cell molding seedlings obtained in Example 1-1. From the petiole base of the first leaf of the main leaf and the petiole base of the second leaf of the main leaf that has been defoliated, it can be seen that the side branches are growing, and the growth is well aligned.

[Example 2]
The difference in the side branch occurrence rate due to the difference in the size of the cell tray (that is, the difference in the number of seedlings per 1 m ² ) was investigated. As the cell tray, those shown in Table 2 below were used. After filling each cell tray with seedling culture soil (“Tanemaki Culture soil” manufactured by Takii Seed Co., Ltd.), seeding and covering with tomato seeds (variety: CF Momotaro Haruka, Momotaro Natsumi), followed by a glass greenhouse in accordance with a conventional method. Raised seedlings within. Twenty-one days after sowing, the interval between the stalk base of the second leaf of the main leaf and the stalk base of the third leaf of the main leaf was about 3 to 5 mm.

  In Examples 2-1 and 2-2, a pinching (third pinching) that cuts the main stem between the main leaf second leaf and the main leaf third leaf, and the main leaf second leaf with its petiole 2 The defoliation (second leaf defoliation) to be cut while leaving about ˜4 mm was simultaneously performed, and the first leaf of the main leaf was left without defoliation. In Comparative Examples 2-1 and 2-2, only the third lower leaf plucking was performed.

  Eight days after pinching / foliage, for seedlings grown in each cell tray of Examples and Comparative Examples, the presence or absence of side branches from the first and second nodes was confirmed, and the ratio of seedlings with two side branches ( The ratio of seedlings having two side branches) and one or fewer side branches (one side branch or less) was determined. Since the period from pinching / foliage to side branch confirmation is relatively short, a high incidence of two side branches means that two side branches are generated quickly and are growing. In other words, if you continue to grow seedlings, there is a possibility that even if there are less than one side branch, there is a possibility that it will become two side branches, but here, from the viewpoint of examining the early occurrence of side branches and the good growth alignment, the side branch confirmation time was set early .

  The results are as shown in Table 3, and in Examples 2-1 and 2-2 in which defoliation was performed together with pinching, compared with Comparative Examples 2-1 and 2-2 in which only pinching was performed, The incidence of side branches was significantly improved. In addition, the smaller the number of seedlings per fixed area (ie, 128 holes than 72 holes, and 72 holes), the incidence of two side branches was higher. In contrast to the comparative example, the greater the number of seedlings per fixed area, the more significantly the effect of improving the occurrence rate of the two side branches, and the higher the production efficiency, the smaller the cell tray with cells (ie, from 72 holes) 128 holes and 200 holes), the superiority of leaf removal together with pinching was confirmed.

[Example 3]
A comparison was made between two tailored seedlings subjected to pinching and leaf removal according to the present embodiment and seedlings not subjected to pinching and leaf removal. “Momotaro 8” is used as a tomato variety, and a 200-hole seedling cell tray is filled with seedling culture soil (“TM-1” manufactured by Takii Seed Co., Ltd.) and then seeded with tomato seeds (March 26) Raised seedlings. Thereafter, in Example 3, after 24 days (April 19th) after sowing, the centrifugation was performed between the second leaf and the third leaf of the main leaf, and the main leaf without removing the first leaf of the main leaf. The second leaf was plucked. Then, after transplanting to a nursery pot on April 28, it was planted on the field on May 14. In Comparative Example 3, the above-mentioned pinching and leaf removal were not performed, and the others were planted in the same manner. Regarding Example 3 and Comparative Example 3, the growth state after planting was investigated as follows.

(1) Nodal position of the first stage inflorescence When the nodal position of the first stage inflorescence was examined for Example 3 and Comparative Example 3 (average of 6 strains), as shown in Table 4 below, a single tailored comparative example In Example 3 with two tails, the node position of the first stage inflorescence was lowered by about one node. In Example 3, the growth of seedlings is delayed by pinching, but the delay of the first inflorescence can be recovered, and the delay can be recovered, and the period until harvesting can be shortened.

(2) Plant height (main branch length) of Example 3
For the 6 strains of Example 3 that were tailored to two, in the flowering period (June 13) of the second stage inflorescence, the length of each of the two branches (side branches tailored as the main branch) was measured, The average was obtained. As a result, as shown in Table 5 below, the variation in the length of the two branches was small, and the variation in the branch length was small among the six strains.

(3) Leaf color The chlorophyll value (SPAD) was measured on July 31. As a result, as shown in Table 6 below, there was no difference depending on the way of tailoring, which was good. The chlorophyll value (SPAD) was measured using a chlorophyll meter SPAD-502 (manufactured by Konica Minolta Co., Ltd.) with the leaf to be measured sandwiched between measurement heads.

(4) Fruit investigation About the fruit obtained in Example 3 and the comparative example 3, the fruit size and fruit component of each 2 stocks were investigated. In order to compare on the same harvest date, Example 3 was examined with the first stage fruit (July 22 harvest), and Comparative Example 3 was examined with the second stage fruit (July 22 harvest). In Example 3, the fruit size and the fruit component were the average of 10 fruits of the fruit obtained from two branches, and in Comparative Example 3, the average of the fruit of seven fruits was obtained from one branch. The methods for measuring Brix sugar content, potassium ion concentration (K ⁺ ), pH, and electrical conductivity for the fruit components are as follows.

  -Brix sugar content: A digital sugar meter manufactured by Atago Co., Ltd. was used. The tomato fruit was cut in half with a knife, the fruit was squeezed by hand, and the fruit juice was put into a sugar content measuring sensor and measured.

K ⁺ : A compact potassium ion meter manufactured by HORIBA, Ltd. was used. The tomato fruit was cut in half with a knife, the fruit was squeezed by hand, and the fruit juice was put into a sugar content measuring sensor and measured.

  -PH: A pH meter manufactured by HORIBA, Ltd. was used. The tomato fruit was cut in half with a knife, the fruit was squeezed by hand, and the fruit juice was placed in a pH measurement sensor and measured.

  Electrical conductivity: A compact electrical conductivity manufactured by HORIBA, Ltd. was used. The tomato fruit was cut in half with a knife, the fruit was squeezed by hand, and the fruit juice was placed in an electrical conductivity measuring sensor and measured.

  The results are as shown in Table 7 below. In Example 3 with two tailors, the fruit size was small compared to Comparative Example 3 with one tailored, but the sugar content was high.

[Example 4]
As rootstock varieties, tomato seeds (variety: Green Save) are sown in a 128-hole seedling cell tray filled with seedling culture soil ("TM-1" manufactured by Takii Seed Co., Ltd.) (Seeding date: August 26). In addition, as a variety for hogi, tomato seeds (variety: CF House Momotaro) were sown in a 200-hole seedling cell tray filled with seedling culture soil ("TM-1" manufactured by Takii Seed Co., Ltd.), and similarly glass Raised seedlings in a greenhouse (seeding date: August 27).

  Using these rootstock and hogi, grafting was carried out on September 16th. Specifically, the rootstock is cut under the cotyledon, a plastic graft support (joint holder, manufactured by Takii Tanae Co., Ltd.) is inserted into the rootstock, and the hogi is cut under the cotyledon. Was inserted into the graft support and joined. After grafting, curing and acclimatization were carried out, and hogi and rootstock were entrapped, and then, on September 23, plucking and plucking were performed. That is, for the safflower part in the grafted seedling, pinching was performed between the second leaf of the main leaf and the third leaf of the main leaf, the second leaf of the main leaf was plucked, and the first leaf of the main leaf was left without being plucked. . After that, by raising the seedlings until October 7, cell-shaped grafted seedlings with two tomatoes were obtained. As Comparative Example 4, the second leaf of the main leaf was not plucked, but only pinching was performed between the second leaf of the main leaf and the third leaf of the main leaf. A grafted seedling was created.

  As shown in FIG. 7, the grafted seedlings of Example 4 thus obtained have side branches growing from the stalk base of the first leaf of the main leaf and the stalk base of the second leaf of the main leaf that has been defoliated. It was good. On the other hand, in the grafted seedling of Comparative Example 4 in which only pinching was performed, the side branch was sufficiently grown from the stalk base of the second leaf of the main leaf, but the side branch was almost from the stalk base of the first leaf of the main leaf. It was not growing.

Claims (9)

  Two tomato seedlings that are pinched between the second leaf of the main leaf and the third leaf of the main leaf, the second leaf of the main leaf is trimmed, and the first leaf of the main leaf is left without being trimmed.   The tomato two-tailored seedling of Claim 1 which has the side branch which grew from the petiole base of the main leaf 1st leaf, and the side branch which grew from the petiole base of the leaf 2   The tomato two-tailored seedling according to claim 1, which is a pinching seedling before a side branch is generated from at least one of a petiole base of the first leaf and a petiole base of the second leaf of the main leaf.   The tomato two-tailored seedling according to any one of claims 1 to 3, which is a cell-molded seedling grown in a cell tray.   The tomato two-tailored seedling according to any one of claims 1 to 4, wherein the seedling is a grafted seedling having the pinching and leafed seedling as a spike.   A method for producing a tomato two-tailored seedling, which is pinched between the second leaf and the third leaf, leaves the second leaf, and leaves the first leaf without leafing.   The method according to claim 6, wherein the side branch is grown from the stalk base of the first leaf of the main leaf, and the side branch is grown from the stalk base of the second leaf of the main leaf that has been defoliated.   The method according to claim 6 or 7, wherein seedlings are produced in a cell tray to produce cell-shaped seedlings with two tomatoes. The method according to claim 8, wherein the number of seedlings grown in the cell tray is 400 or more per 1 m ² .