JPH11275954A - Production of transplanted seedling of eucalyptus globulus plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a general system capable of mass production of seedlings of a plant belonging to the genus Eucalyptus globulus, therefore suitable for the production of transplanted seedlings of the plant. SOLUTION: This proliferative production method for cuttings of a plant belonging to the genus Eucalyptus of Myrtaceae is characteristic in that the following operations (1) to (4) are respectively repeated at least once more to form many lateral branches which are then separated to be served as cuttings: (1) treetops of the main trunks and/or subtrunks of a eucalyptus plant; (2) lateral branches produced are grown; (3) the treetops of the grown lateral branches are excised; and (4) fresh lateral branches are grown from the lower parts of the excised lateral branches.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for producing transplanted seedlings of Eucalyptus plants. The present invention relates to a system for producing seedlings by transplanting seedlings by temporarily planting them in a seedling raising container.

[0002]

2. Description of the Related Art Eucalyptus plants are woody plants of the family Myrtaceae native to Australia, and are mainly used as pulpwood, firewood and building materials. In particular, it is highly evaluated as a pulp material, and tree planting projects are currently underway in Latin America, Oceania, and Southeast Asia.

The seeds of Eucalyptus plants vary depending on the cultivar, but generally have a low germination rate and a slow germination period, so that seedlings are not uniform in size. In addition, since it is extremely fine (100 to 1500 grains / g), it is sowed in a bottomed container filled with culture soil, and after germination, a young seedling is taken out and temporarily planted in a seedling raising container, and after seedling for a predetermined period (3 to 6 months), Most seedlings are planted in the field. Temporary planting of seedlings is a labor-intensive and mentally painful task that depends on human labor. Also, the survival rate in the seedling raising container is poor, and the seedling yield is only 60 to 70%.

Conventionally, as a method for producing seedlings of plants, a tissue culture seedling method and a cutting seedling method have been known in addition to a seedling seedling method.
Of these, the tissue culture seedling method requires facilities and skilled advanced techniques, and inevitably increases costs. The cutting method is
A method of obtaining a new individual by inserting a part of the plant into seedling soil and obtaining roots.It has the advantage of being able to obtain individuals in a shorter time than the seedling seedling method with the same trait, but an effective propagation method There is no.

[0005] On the other hand, plastic containers are often used as seedling containers for planting trees. However, at the time of regular planting, the operation of removing the containers is troublesome, and disposal of the residue is an environmental problem.

[0006]

As described above, all of the known seedling production methods have drawbacks and still need to be improved. Particularly, the germination rate of Eucalyptus plants is low. There are many problems that are peculiar to Eucalyptus plants, such as low ones, and such trees are often planted in mountainous areas and sloping lands. There is a strong demand for prevention of pollution and environmental pollution.

The present invention has been made in view of such a state of the art in the art to develop a new integrated system suitable for the production of trees, especially transplanted seedlings of Eucalyptus plants.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made to achieve the above object, and as a result of studies from various fields, has focused on a plastic nursery container in terms of labor saving and workability. In order to overcome the shortcomings, we focused on paper-growing seedling containers (paper cylinders).

However, if a paper cylinder is used, it can be planted in a field without any pollution.
Although the roots are protected and the roots are good, the Eucalyptus plants are southern trees, so they have to raise seedlings under hot and humid conditions, and there is a problem that the paper quality of paper cylinders is likely to collapse. It could not be used for long-term seedling raising. However, the merits of the paper cylinder cannot be ignored, and the present inventor has studied a method of cultivating seedlings with short-term seedlings of such a degree that the paper cylinder does not collapse,
Focusing on the phenomenon that a large number of side branches are generated when the main trunk and sub-trunk of a eucalyptus plant are cut off, we find that it can be used as a cutting by cutting off the side branches sequentially and continuously generating side branches. Thus, the present invention has been completed.

[0010] That is, the present invention provides: (1) cutting off the top of the main trunk and / or sub-trunk of Eucalyptus plants; (2) growing the generated side branch; (3) removing the top of the grown side branch. (4) Growing a new side branch from below the excised side branch. The above-mentioned operations (1) to (4) are repeated at least once or more to form a large number of side branches, and then the side branches are separated into cuttings. This is a multiplication production method. Hereinafter, the present invention will be described in detail.

FIG. 1 schematically shows the basic technical concept of the present invention.
Shown in In the figure, (I): the head of the eucalyptus mother tree 1 is cut off. Then, the primary side branch 3 grows (four in the figure). An enlarged view of one of the primary side branches 3 is (I
Shown in I). (II): The primary side branch 3 is cut. C indicates a cutting position. Then, (III): the secondary side branch 4 grows (in the figure, six primary side branches 3 grow from one primary side branch 3). These secondary side branches 4 are cut into cuttings. C indicates a cutting position. These cut positions are not limited to positions as long as the side branches grow.

In the present invention, the mother tree of eucalyptus is used from one year to several years old, but it is allowed to grow as it is after the first cutting of the secondary side branch, and the head is cut off when necessary. Secondary branches can be grown and the secondary branches cut. This mother tree can be used for a considerably long time until no secondary side branches emerge.

The cuttings thus obtained are temporarily planted in a paper cylinder filled with soil suitable for growing eucalyptus seedlings, and then the temperature, moisture, etc. are appropriately controlled to allow rooting of the seedlings to proceed smoothly. Thus, it is possible to obtain high quality and uniform size of transplanted seedlings.
The transplanted seedlings thus obtained can be directly planted in a field, a mountain forest, or the like, without removing the paper cylinder. At that time, seedlings from the side branches grow fast (1-2
Therefore, the paper container still retains the strength of the paper quality, and the transplanting operation can be performed smoothly. If necessary, the cuttings may be directly planted in a field, a mountain forest, or the like without temporarily planting in a paper cylinder and raising seedlings.

More specifically, seedling production of the Eucalyptus plant of the present invention can be performed as follows. First, the top of the tree is cut off at the age of one to two years. The cutting site varies depending on the cultivar and growth conditions, but is 30 to 70
It is preferable to diagonally cut the height of cm. About 1 from cutting
Primary side branches occur in 4 days. 70 to 10
After growing to about 0 cm, the head is cut off. The cutting site is preferably 30 to 70 cm from the side branch base. A secondary side branch occurs about 20 days after the cutting. This 2
Although the secondary side branch can be used as a seedling, the number of the primary side branch and the secondary side branch is usually about 4 to 5 each, so that only about 20 seedlings can be obtained at this time. Therefore, it is preferable to cut off the top of the secondary side branch as in the case of the primary side branch to generate a side branch. A tertiary side branch obtained from the secondary side branch;
By performing the same processing on the quaternary side branch obtained from the tertiary side branch, the number of seedlings obtained can be further increased.

If necessary, the above operation is repeated to generate a sufficient number of side branches, and when they have grown to a certain size, the side branches are separated and used as cuttings. The obtained cuttings are temporarily planted in a seedling raising container filled with seedling raising soil, grown and then planted in a field. Hereinafter, examples of the present invention will be described.

[0016]

Example 1 Eucalyptus plant seeds (cultivar: Eucalyptus)
camaldulensis) in a container (inner method 40 × 60 × 15 cm) filled with a seedling cultivation medium with a mesh bottom,
After germination, the seedlings were carefully planted carefully in a conical seedling raising container (plastic, 8 cm in diameter, 15 cm in height). After 90 days of growing, the seedlings were removed from the seedling raising container and planted in a seedling field. At the time when the tree height reached about 2 m 24 months after planting,
A portion 50 cm above the ground was cut diagonally.
About 14 days after the cutting, four primary side branches occurred. After growing the side branches to about 80-90 cm in length,
Each head was cut off. About 20 days after cutting
A total of 20 secondary side branches occurred.

As for the secondary side branch, the head was cut off in the same manner as in the case of the primary side branch to generate a side branch. The number of seedlings obtained by performing the same process on the tertiary side branch obtained from the secondary side branch and the quaternary side branch obtained from the tertiary side branch was 180 per plant.

[0018]

Example 2 The cuttings obtained in Example 1 were sterilized and disinfected with a 500-fold solution of benlate wettable powder (trade name: fungicide manufactured by DuPont, USA). Paper Pot (registered trademark) (manufactured by Nippon Sugar Beet: Standard FS615 No. 6.4 cm square, 15.0)
cm height 80 spells) nursery box (inner method 40 × 60 × 1)
5 cm), filled with seedling cultivation soil (trade name: Nitten super cultivation made by Nippon Sugar Beet Sugar), sterilized and sterilized cuttings were inserted 2-3 cm from the surface of the cultivation soil, and temporarily planted.
Then, place the nursery box under the condition of a temperature of 20 to 30 ° C., sufficiently water the day of provisional planting, watering the leaves so that the leaves are damp on the second to tenth days, and every other day after the eleventh day And the rooting state was examined on the 20th day. As a result, all of the seedlings were successfully rooted.
On day 0, good quality transplanted seedlings were obtained. The paper quality of the used paper pot was also sufficiently strong, and did not hinder the planting operation at all.

[0019]

Industrial Applicability The present invention is a practical breeding technique capable of producing seedlings in a short time for Eucalyptus plants. The seedlings for raising seedlings of the present invention have no variation between hybrids due to interspecific crossing found in seedlings and are genetically homogeneous, so that the growth rate after planting is the same, and the harvest time and yield of trees are almost the same. Predict accurately. Also,
Since the cut seedlings using the side branches are made of wood and have high strength, they are easy and labor-saving when temporarily planted in a seedling raising container. Further, in the method for raising seedlings of the present invention, since the growing period is short, deterioration of the paper quality of the paper-made seedling growing container is prevented, and the seedling raising and planting using the paper-made seedling growing container are enabled. For this reason, it succeeded in drawing out the advantages such as labor saving of the original container.

[Brief description of the drawings]

FIG. 1 schematically shows the outline of the method of the present invention.

Claims (4)

[Claims] 1. A plant of the family Eucalyptus belonging to the family Myrtaceae, wherein the following operations (1) to (4) are repeated at least once or more to form a large number of side branches, and then the side branches are separated into cuttings. Cutting cutting multiplication and production method: (1) cutting off the top of the main trunk and / or sub-trunk of Eucalyptus plant; (2) growing the generated side branch; (3) cutting off the top of the grown side branch (4) growing a new side branch from below the resected side branch; 2. A method for producing transplanted seedlings of Eucalyptus plants, comprising producing cuttings according to the method described in claim 1, and temporarily planting the obtained cuttings in a nursery container. . 3. The method according to claim 2, wherein a paper-made seedling raising container is used as the seedling raising container. 4. A nursery container containing a Eucalyptus plant seedling produced by the method according to claim 2.