JPS62215501A - Promotion of growth of rice plant seed - Google Patents

Abstract

PURPOSE:To make it possible to obtain seedlings of rice plants having improved growth of roots and suppressed plant height and to grow healthy rice plants having resistance to cold by dipping seeds of rice plants in a solution containing choline or a salt thereof and treating the seeds with ultrasonic waves. CONSTITUTION:Seeds of rice plants are dipped in a solution containing choline or a salt thereof and treated with ultrasonic waves to promote the growth of the rice plant seeds. Examples of the choline salt used include hydrochloride, phosphate, acetate, lactate, etc. A formulation containing such choline or salt thereof is used in the form of powder, emulsion, aqueous or oily suspension, etc. The concentration of the solution containing the choline, etc., is normally 300-3,000ppm, preferably 500-2,000ppm. When the seeds are dipped in the solution containing the choline, etc., the dipping time is preferably 6-24hr. The treatment with the ultrasonic waves for about 2hr is normally carried out 1-5 times.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for promoting the growth of rice seeds.

[Problems to be solved by conventional technology and invention]

BACKGROUND ART Conventionally, as a crop growth promoter using seed treatment, promotion of growth of various crops by calcium peroxide treatment is known. The applicant has also filed a patent application for a method of treating seeds with choline salts to promote growth. However, the effect of promoting crop growth by these seed treatments was not necessarily fully exhibited depending on the type of crop seed. The present inventors conducted extensive research on methods for exerting the effect of promoting seed growth, and as a result, discovered an excellent method for treating rice seeds with a seed treatment agent containing choline or choline salts, and developed the present invention. completed.

[Means for solving problems]

That is, the present invention is a method for promoting the growth of rice seeds by immersing them in a solution containing choline or choline salts and subjecting them to ultrasonication.

In the present invention, rice seeds refer to rice seeds such as paddy rice or upland rice. Moreover, the variety of rice is not particularly limited.

In addition, in the present invention, choline salts include inorganic salts such as hydrochloride, phosphate, polyIJ salt, sulfate, nitrate, silicate, carbonate, acetate, citrate, and lactic acid. Salt, L(-
It means an organic acid salt such as H-tartrate.

These medicaments containing choline or choline salts may be formulated into any conventionally known form such as powder, aqueous solution, emulsion, aqueous or oily suspension.

In the method of the present invention, the concentration of the solution containing choline or choline salt is generally 300 to 3°
m, preferably 500 to 2,000 ppm. The time for immersion in a solution containing choline or choline salts depends on the temperature of the solution, but is generally 1 to 48 hours.
time, preferably 6 to 24 hours. The temperature of the solution is usually room temperature, but is not particularly limited as long as it does not shade the rice.

In the method of the present invention, the ultrasonic treatment is usually carried out for about 2 hours one to five times, but for example, in the case of immersion for 24 hours, the ultrasonic treatment is carried out once for two hours. is taken. The time and number of ultrasonic treatments are appropriately selected depending on the immersion temperature and other conditions.

The rice seeds subjected to the method of the present invention as described above are washed with water and then dried, or the seeds are sown after being subjected to germination treatment.

〔Effect of the invention〕

The rice seedlings obtained by germinating the rice seeds using the method of the present invention have excellent root growth, and the plant height of the seedlings is suppressed, making them cold resistant and capable of healthy rice growth. It is possible.

〔Example〕

The present invention will be explained in more detail with reference to Examples.

Example 1 Rice seeds (variety Nipponbare) 4? 0.04f at 16℃
It was immersed in a 1000 ppm aqueous solution of choline chloride 8d containing Benlate T for 2 days, and sonicated only on the first day.
There were two groups: one treated once, and another treated once for 2 hours on the first and second day, twice in total.

After removing the choline aqueous solution, add 8R of water and heat at 30℃ for 1 day.
18 seeds were sown on top of the wound.

After sprouting at 32°C for 4 days, the seeds were grown in a greenhouse at 20-25°C for 32 days. In addition, Comparative Example 1 is an example in which the specimen was immersed only in water containing benlate and no ultrasonic treatment was performed, Comparative Example 2 is an example in which the specimen was immersed only in water containing benlate and subjected to ultrasonic treatment, and Comparative Example 3 is an example in which the specimen was immersed in water containing benlate and not subjected to ultrasonic treatment. An example is shown in which the sample was immersed in an aqueous solution containing choline chloride but not subjected to ultrasonic treatment. The test results are shown in Table 1.

Claims (1)

[Claims] A method for promoting the growth of rice seeds, which comprises immersing rice seeds in a solution containing choline or choline salts and subjecting them to ultrasonication.