JPH04267822A - Medium for raising beet seedling - Google Patents

Abstract

PURPOSE:To provide the subject medium giving a high germination rate in the preparation of beet seedlings by specifying the depth and sowing hole diameter of a seedling medium shaped into a pillar shape. CONSTITUTION:A sowing hole 2 having a diameter of 0.75-1.75 times, preferably approximately 1 times, the long diameter of a beet seed and a depth of 2-5 times, preferably approximately 2-3 times, the long diameter of the beet seed is formed on the upper surface of a seedling-raising porous medium shaped into a pillar shape, thereby permitting to prevent the failure of the germination and accelerate and uniform the germination of the seeds.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a culture medium for raising beet seedlings, and in particular, the present invention relates to a culture medium for raising beet seedlings, and in particular, when raising beet seedlings using a porous body formed into a columnar shape, the present invention has suitable seeding holes for obtaining excellent germination. This invention relates to a medium for growing beet seedlings.

0002

[Prior Art] Conventionally used culture media for beet seedlings are usually made by drying natural soil or culture soil to an appropriate moisture retention state, sterilizing or disinfecting it as the case may be, and then sieving the soil. After adjusting the particle size and adjusting the acidity, it is mixed with seedling fertilizer, packed into paper tubes commonly known as paper pots, seeds are sown, and then pesticides are mixed and adjusted on top. Seedlings are raised by covering the soil with soil.

However, in recent years, it has become extremely difficult to secure soil for use in the conventional method of filling soil using paper tubes due to pesticides, pathogen contamination, continuous cropping problems, and the like. In particular, when raising beet seedlings, the amount of soil used in the seedling growing medium is larger than that of other crops that are raised and transplanted. Mix it with fertilizer, pack it into paper tubes, sow the seeds,
A large amount of labor is required to carry out the series of work of covering the soil with soil.

[0004] Therefore, there is a particular demand from farmers for a medium for growing beet seedlings that is lightweight and easy to handle in place of soil. Therefore, the present inventors developed a medium for raising beet seedlings that reduces labor when raising beet seedlings, eliminates the need for securing soil, and enables the growth of healthy seedlings with a high germination rate. A seedling growing medium made of a porous material made of
The bulk density of the columnar molded body is 0.03 to 0.2 g/cm3
A medium for growing beet seedlings has been proposed in Japanese Patent Application No. 1-73962.

[0005] This medium is expected to have great effects, as it will not only significantly reduce labor for beet cultivation farmers, but also enable the same or higher germination rate than conventional methods and the easy growth of healthy seedlings. .

According to the cultivation experience to date, on average, the desired effect is fully demonstrated, but for some reason there may be variations in germination, and the germination rate is always stable and high. Further investigation is desired regarding the composition of the medium that can maintain the germination rate.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a medium for growing beet seedlings that can consistently achieve a high germination rate when growing beet seedlings.

[0008]

[Means for Solving the Problems] The present invention has been made to solve the above problems, and its gist is as follows: (1) In a seedling growing medium made of a columnar porous body. , the diameter of the seeding hole provided on the top surface is 0.75 to 1.75 times the long axis of the beet seed, and the depth is 2
A beet seedling growing medium characterized by ~5 times the

(2) The seeding hole according to (1) above, wherein the diameter of the upper surface of the seeding hole is equal to or larger than the diameter of the lower surface of the seeding hole. This is a medium for raising beet seedlings.

The present invention will be explained in detail below. First, the columnar porous seedling growing medium according to the present invention may be of any type as long as it is hydrophilic and does not elute substances harmful to plants during germination and seedling raising. Examples include rock wool fibers, glass fibers, ceramic fibers, carbon fibers, polyester fibers, cellulose fibers such as rayon, inorganic or organic fibers such as PVA fibers and wood fibers, or foamed ceramics.
There are inorganic or organic porous molded products such as perlite, vermiculite, foamed sintered viscosity, foamed phenol resin, foamed urea resin, and foamed polyurethane.

FIG. 1 shows one embodiment of a prismatic seedling growing medium according to the present invention, in which the porous body 1 is arranged vertically, horizontally,
It is shown as having a prismatic shape with a height of W1×W2×h, and a seeding hole 2 is provided on the top surface. In the present invention, the diameter and depth of the seeding holes 2 provided on the upper surface of the beet seedling growing medium made of the columnar shaped porous body 1 are the diameters d1, d2 (
However, the upper surface diameter d1 and the lower surface diameter d2) are 0.75 to 1.75 times the major axis S of the beet seeds 3 shown in FIG.
The depth l needs to be 2 to 5 times, and in particular, the diameter is preferably about 1 time the long axis S of the beet seed, and the depth is about 2 to 3 times.

[0012] The beet seeds 3 in Fig. 3 show an example of naked seeds, but when coated seeds are used, they are formed into an almost spherical shape, so the major axis S can be considered to be the diameter of the sphere. Bye. FIGS. 2(a) and 2(b) are schematic diagrams showing some aspects of the seeding hole 2 in the present invention, and d1
is the upper surface diameter, d2 is the lower surface diameter, and l is the depth. If the diameters d1 and d2 are smaller than 0.75 times the long axis S of the beet seeds, even if the beet seeds germinate in the seeding hole, the young shoots will not be able to come out to the surface of the medium due to medium pressure and will die. There will be more. When the size is larger than 1.75 times, the beet seeds become easily dry and difficult to germinate.

[0013] If the depth l is smaller than twice the long axis S of the beet seeds, the seeds will be affected by the external environment too much, making it difficult to germinate. On the other hand, if the depth is greater than 5 times the long axis S of the beet seeds, even if the beet seeds germinate in the seeding hole, it will take time for the buds to reach the surface of the medium, and the young buds will wither and die on the way. In many cases, the buds cannot find an exit and become "coiled" and die, and germination is uneven.

Furthermore, the shape of the seeding hole 2 is either cylindrical with the upper surface diameter d1 and lower surface diameter d2 shown in FIG. It is particularly effective that it is an inverted truncated cone in which d1 is larger than the lower diameter d2. Of course, the diameter of the upper surface at this time must be at most 1.75 times or less the long axis of the beet seed, and the diameter of the lower surface must be at least 0.75 times or more the longer diameter of the beet seed. If the shape of the seeding hole is a conical one where the diameter of the bottom surface is larger than the diameter of the top surface, beet seeds will not sprout from the seeding hole even if they germinate in the seeding hole, and will become "coiled" in the seeding hole and die. I end up doing more things.

[0015] As described above, by using the seeding hole of the present invention, various factors that cause poor germination can be avoided and good germination can be obtained.

[0016] Furthermore, although the seeding holes of the present invention can obtain a sufficiently high germination rate and vigor, organic or inorganic organic or It is also possible to cover the soil with a porous material or a mixture of the porous material and an agricultural chemical or fertilizer and inject it into the seeding hole after or at the same time.

The present invention will now be explained in more detail with reference to Examples. (Example 1 and Comparative Examples 1 and 2) Using rock wool as the porous body, the bulk density of the columnar molded body was 0.065 g/cm3
, its shape is a rectangular prism with a seeding hole as shown in Fig. 1, the dimensions are W1 = W2 = 17.5 mm, h = 130 mm, and the seeding hole has a diameter d1 = d2 = 4 mm and a depth l = 10.
A cylindrical piece with a diameter of mm as shown in FIG. 2(a) was provided. 25 of these were tied together and made into an aggregate in the medium, and the beet variety “
Example 1: Using commercially available bare seeds (lengthwise axis S is about 4 mm) of "Sun Hill", seeds were sown into the seeding holes of the present invention in each of 25 culture media.

[0018] In a similar porous body, an inverted triangular cut (not shown) was made for the seeding hole, and the width of the cut was 10 mm.
Comparative Example 1, the culture medium was seeded at a depth of 10 mm.

[
Comparative Example 2 was a culture medium in which seeds were seeded with seeding holes provided with a diameter of d1 = d2 = 8 mm and a depth of 1 = 10 mm.

Seedling raising was carried out for 40 days using liquid fertilizer (1 unit of garden trial formulation) during irrigation. A summary of these seedling raising tests is shown in Table 1.

[0021]

[Table 1]

As shown in Table 1, when beet seedlings are raised using a seeding hole having a size and shape within the scope of the present invention, the germination rate and vigor are clearly improved compared to conventional seeding holes. It is clear that the growth rate is improved, thereby improving the seedling growth rate, and the growth is also improved by extending the growing period due to early and uniform germination.

[0023]

[Effects of the Invention] According to the present invention, it is possible to easily obtain a higher germination rate and vigor than with conventional culture media, and the germination is early and consistent, which extends the growing period of the seedlings, thereby improving the growth of the seedlings. This also improves the ability to grow healthy seedlings efficiently. There are some areas that contribute greatly to the development of agriculture.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing an example of a mode of a seedling growing medium;

FIGS. 2(a) and 2(b) are schematic diagrams showing some aspects of the seeding hole in the present invention,

FIG. 3 is a schematic diagram showing an embodiment of beet seeds.

[Explanation of symbols]

1 Porous body 2 Seed hole 3. Beet seeds

Claims (2)

[Claims] Claim 1: In a seedling raising medium made of a columnar porous body, the diameter of the seeding hole provided on the upper surface is 0.75 to 1.75 times the long axis of the beet seed, and the depth is as large as the beet seed. A medium for growing beet seedlings, characterized in that the length is 2 to 5 times the long axis of seeds. 2. The beet seedlings according to claim 1, characterized in that the seeding hole has the shape of a cylinder, a prism, an inverted cone, or an inverted pyramid, in which the diameter of the upper surface of the seeding hole is equal to or larger than the diameter of the lower surface. Medium for use.