JP2645920B2 - Method for enriching oxygen in gel-coated seeds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for enriching oxygen for improving the germination rate of gel-coated seeds.

[0002]

2. Description of the Related Art Conventionally, it has been difficult to mechanically sow minute irregular shaped seeds. Therefore, the development of coated seeds for covering the seed surface with diatomaceous earth or the like has been promoted. However, after sowing, a water film was formed on the coating surface due to rainwater, irrigation, etc., and required oxygen was not supplied at the time of germination, resulting in troubles such as poor germination.

[0003] In view of the importance of oxygen supply during germination, the applicant has proposed a method and an apparatus for enclosing air bubbles in a gel coating so as to come into contact with seeds (Japanese Patent Application Laid-Open No. Sho 63).
-209502). However, some seeds such as spinach, radish, and onion have a large oxygen demand at the time of germination, and may cause poor germination. Even for seeds that germinate and grow well, the oxygen demand varies depending on the temperature conditions at the time of germination.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems, and prevents the lack of oxygen even in seeds that require a large amount of oxygen at the time of germination, thereby improving the germination rate. It is an object of the present invention to provide a method of enriching gel-coated seeds which can be performed.

[0005]

According to the present invention, there is provided a method for enriching gel-coated seeds according to the present invention.
As described above, the gel-coated seeds are immersed in a predetermined concentration of hydrogen peroxide solution for several minutes to several hours. Then, after the immersion treatment, the surface of the gel-coated seeds is washed with running water and provided for sowing.

Gel-coated seeds are prepared by coating a plant seed with an aqueous gel aqueous solution of an alkali salt (eg, sodium alginate, sodium polyacrylate) according to the method described in the literature (eg, JP-A-63-68008). After that, a divalent or trivalent metal salt aqueous solution (Ca, Mg,
Reaction with an aqueous solution of a chloride such as Ba) to insolubilize the coating layer. In addition, a known method and apparatus (for example, JP-A-63-2
No. 09502), bubbles may be enclosed in the gel coating.

[0007] If the concentration of the hydrogen peroxide solution is too low, the effect is small, and long-term immersion is required. Therefore, the coating may expand under the influence of the osmotic pressure and break or rupture. When the concentration is high, germination is more adversely affected than oxygen enrichment.

[0008] The immersion time is based on the time during which the aqueous hydrogen peroxide penetrates into the interior of the gel coating and comes into contact with the seeds to generate oxygen bubbles. Accordingly, the immersion time varies depending on conditions such as the concentration of the hydrogen peroxide solution, the thickness of the gel coating layer, and the temperature of the immersion liquid, but can be appropriately selected in the range of several minutes to several hours. The immersion temperature is preferably room temperature (15 to 25 ° C.).

[0009]

By immersing the gel-coated seeds in a hydrogen peroxide solution, hydrogen peroxide penetrates into the coating and comes into contact with the seeds.
Generates oxygen. Since the generation of oxygen occurs by contact with the seed, the generated oxygen is enclosed between the seed and the gel coating,
The surroundings of the seeds are, as it were, surrounded by oxygen together with bubbles, and supply sufficient oxygen to the seeds having a large oxygen demand to promote germination.

[0010]

EXAMPLES As a test material, radish seeds were used. Test plots: 1) control plots without coating treatment, etc.
Three treatment sections were provided: 2) gel-coated, 3) gel-coated, and oxygen-enriched with hydrogen peroxide.

[0011] The gel coating was performed by coating the periphery of the seed with sodium alginate and dropping it into calcium chloride. In the oxygen enrichment treatment, radish seeds subjected to the gel coating treatment were immersed in a 7% hydrogen peroxide solution at room temperature for 2 hours.

After each treatment, 100 seeds of radish seeds were placed on a petri dish, and each seed was provided four times. Each petri dish was left still in a 25 ° C. thermostat. Table 1 shows the obtained results.
It was shown to.

[Table 1]

As shown in Table 1, the germination rate was higher in the oxygen-enriched section immediately after sowing than in the control section and the gel-covered section, indicating that the oxygen-enriched treatment promoted germination.

[0014]

As described above, according to the present invention,
Although it is a short immersion treatment of several minutes to several hours, as a result of the treatment, the seeds included in the gel coating are surrounded by oxygen, and the oxygen is retained by the gel coating even after the treatment, Poor germination due to lack of oxygen is eliminated. Also, since the treatment uses a low concentration of hydrogen peroxide solution, it is safer than other oxygen generating agents, and can enrich oxygen in gel-coated seeds easily and inexpensively. Due to the short time, it is suitable for mass processing.

Claims (1)

(57) [Claims] 1. The method of claim 1, wherein the gel-coated seed is combined with the gel-coated seed.
A method for oxygen-enriching gel-coated seeds, characterized by immersing the gel-coated seeds in a hydrogen peroxide solution until bubbles are generated during the process.