JPS6124501A - Promotor for root germination and taking root of rice plant - Google Patents

Abstract

PURPOSE:A promotor for root germination and root taking of rice plant, after transplanting to paddy fields, showing improved separation, capable of exhibiting improved effect especially at low temperature, treating seedling of rice plant before transplanting with a promotor containing one or more choline salts. CONSTITUTION:A promotor containing one or more choline salts, and an inorganic salts such as hydrochloride, phosphate, polyphoshate, sulfate, nitrate, silicate, carbonate, etc. and organic salts such as acetate, citrate, lactate, L(+) tartrate, etc, may be cited as the choline salts. These salts are made into a preparation form such as powder, aqueous solution, emulsion, aqueous or oily suspension, etc. and used. The amount used is 10-1,000ppm, preferably 25- 200ppm aqueous solution before transplanting, preferably up to 10 days before transplanting, by flooding in root parts of seedling of rice plant. The promotor is used as an aqueous solution, it can be blended with a liquid fertilizer, an insecticide, a fungicide, etc. and used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a novel rice rooting and rooting promoter. More specifically, the invention relates to a rice rooting and rooting promoter characterized by containing one or more choline salts.

[Prior art]

It has been known that rooting can be promoted by immersing sweet potato seedlings in a choline solution.

However, there is no report that treatment of rice seedlings with choline salts promotes rooting and rooting.

[Problem that the invention seeks to solve]

Improvements in rice varieties and cultivation techniques have made it possible to cultivate rice in cold regions. However, one of the problems with rice cultivation in cold regions is that when rice seedlings are transplanted into rice fields. , Seedlings do not take root due to the low temperature. For example, if low temperatures persist, there may be cases where there is little growth for one month after transplantation. ``And if the transplanting period is delayed to avoid this, there is a risk that the harvest will be covered in snow.The present invention aims to improve these problems. Treatment with a choline salt solution promotes rooting and rooting of rice plants after transplanting with Honda, and makes them easier to divide.

[Means to solve the problem]

In the present invention, examples of choline salts include the following compounds.

Inorganic salts such as hydrochlorides, phosphates, polyphosphates, sulfates, nitrates, silicates, carbonates, acetates, citrates,
Indicates organic acid salts such as lactate and L(+)tartrate.

The agent of the present invention containing these choline salts can be formulated into any conventionally known dosage forms such as powder, aqueous solution, emulsion, aqueous or oily suspension.

The amount of the inventive agent used depends on the variety of rice, growth stage of rice,
Although it varies depending on the method of use or the time of use, the root edge of rice seedlings is generally irrigated with an aqueous solution before transplanting, preferably at least 10 days before transplanting. The concentration of choline salt in this case is 10 ppm to 11000 ppm, preferably 25 to 2
00 ppm.

The agent of the present invention is generally used in the form of an aqueous solution, but it can also be used in combination with liquid fertilizer, insecticide, fungicide, etc.

Next, a manufacturing example of a compound related to the agent of the present invention will be shown.

Production example 1゜Choline phosphate production method 50% choline (manufactured by Nippon Hydrazine) 208g, pure water 8g
4ml was cooled to below 5℃ under nitrogen atmosphere while stirring.
110 g of 9% phosphoric acid was added dropwise.

As a result, 402 g of a 50% aqueous solution of choline phosphate was obtained. The pH of this product was 4.9. This aqueous solution was concentrated to obtain a phosphate.

In a similar manner, aqueous solutions of various choline salts were prepared by changing the acid, and winter crystals were obtained by concentrating the solutions. In addition, salts for which it was difficult to obtain crystals were subjected to the test as an aqueous solution.

The physical property values of an example of the compound are as follows.

Compound properties Physical properties Choline chloride 70wt% aqueous solution Specific gravity 1.095 pH
7,0 Choline phosphate m, ρ200-205°C Choline bitartrate (tartrate) m, p149-153°C Choline dihydrogen citrate (citrate) m, p105-107. '5℃ [Operation and Effects of the Invention] By treating rice seedlings before transplanting with an aqueous solution of the agent of the present invention, rooting or rooting of rice seedlings after transplanting to Honda is promoted, and division is also improved. In particular, it is possible to exhibit excellent effects at low temperatures.

〔Example〕

Next, the present invention will be explained in more detail with reference to Examples.

Example] Paddy rice seeds (Yukihikari) sterilized with Berere (200 times solution) were sown in seedling boxes mixed with 6 g/box of 4% Tajigaren granules for soil sterilization. 24 days after seeding, each box was irrigated with 500+ el of choline chloride solution at each concentration. Twenty-five days after sowing, five plants were planted on 1/5000 a Wagner Posoto, three plants per pot, and growth was investigated 10 days later. The average temperature during this period was 14.
The temperature was 8°C, which was a low temperature. The survey results are shown below.

Fresh weight (ratio to untreated area) Stems, leaves, roots “Untreated area” 100 (0.4 g/plant) 100 (
0.28g/piece) Choline chloride 20ppe 96
130” 50ppm 98 160
” 1100pp 98 165 Example 2゜Paddy rice seeds sterilized with Benlate T (200 times solution)
Ishihikari) was germinated in a thermostat at 32°C.

Two days later, 100g/box of dry rice was sown in a seedling box filled with artificial bed soil and kept in a seedling box at 32°C for 2 days.

After germination, 500ml of Daconil (1000x solution) was administered and kept in a plastic greenhouse.

5 days before transplantation choline phosphate 12.5mg, 25mg,
50 mg each was diluted with 500 ml of water and irrigated into one box each. Thirty-five days after sowing, the plants were transplanted by hand into Honda, and a growth study was conducted one month after transplanting. The results are shown below.

111g 7 boxes Plant height (c+n) Number of stems (no treatment) 22.3 4.9 Choline phosphate
12.5 21.1 5.3〃25 21
．． 2 5.8 〃50 19.0 5.0 The average temperature for each number of days after transplantation was as follows.

Number of days 0-45-910-1415-1920-2425
~29'CI2.0 1B, 5 15.8 19.1
17.1 17.1 Remove the roots of the transplanted seedlings treated with choline phosphate and add water to 100 cc':-
], and grown at 15°C for 14 days to investigate rooting. The results are shown below.

Claims (1)

[Claims] A rice rooting and rooting promoter characterized by containing one or more compounds of choline salts