JP-2026075036-A - Agricultural compositions, seedling products, and methods for cultivating plants

Abstract

[Problem] To provide agricultural compositions, seedling products, and plant cultivation methods that facilitate plant growth. [Solution] The agricultural composition contains microorganisms of the genus Neobacillus. The seedling product comprises a growing medium and seedlings grown in the growing medium. At least one of the seedlings and the growing medium is treated with the agricultural composition. The method for cultivating plants comprises the step of treating the plants with the agricultural composition. [Selection Diagram] Figure 1

Inventors

• 梅木 大輔
• 藤原 正幸
• 平田 哲也
• 近藤 竜彦

Assignees

• ヤンマーホールディングス株式会社
• 国立大学法人東海国立大学機構

Dates

Publication Date

20260507

Application Date

20250508

Priority Date

20241021

Claims (11)

1. An agricultural composition containing microorganisms of the genus Neobacillus.
2. The agricultural composition according to claim 1, wherein the microorganism is a species of the genus Neobacillus, Cucumis.
3. The agricultural composition according to claim 1, wherein the microorganism has the property of exhibiting growth-promoting effects on multiple types of plants.
4. The agricultural composition according to claim 1, wherein the microorganism has the property of exhibiting a growth-promoting effect on at least one of Brassicaceae plants and Solanaceae plants.
5. The agricultural composition according to claim 1, wherein the microorganism exhibits a disease-suppressing effect against plant pathogenic fungi.
6. The agricultural composition according to claim 2, wherein the microorganism is strain B20 of the Neobacillus cucumis species (accession number: NITE P-04312).
7. The agricultural composition according to any one of claims 1 to 6, wherein the microorganisms have the property of proliferating in response to the exudate of plant roots.
8. The agricultural composition according to any one of claims 1 to 6, wherein the microorganism has the property of producing auxin.
9. The agricultural composition according to any one of claims 1 to 6, wherein the microorganism has the property of exhibiting a growth-promoting effect on plants when the turbidity is 0.05 or higher (OD 600 ).
10. A seedling product comprising nourishing soil and seedlings cultivated in the aforementioned nourishing soil, A seedling product in which at least one of the seedling and the growing medium is treated with the agricultural composition described in any one of claims 1 to 6.
11. A method of cultivating plants, A method for cultivating plants, comprising the step of treating the plants with the agricultural composition described in any one of claims 1 to 6.

Description

This invention relates to agricultural compositions, seedling products, and methods for cultivating plants. Patent Document 1 discloses a microbial strain of Arthrobacter oxydans, accession number FERM P-22038, which has the properties of promoting the growth of Capsicum plants, suppressing the occurrence of late blight, and preventing yield reduction due to continuous cropping of Soybean plants. Japanese Patent Publication No. 2012-135300 This figure illustrates the taxonomic position of the microorganisms contained in the agricultural composition according to this embodiment.This figure shows the results of a first test concerning the microorganisms contained in the agricultural composition according to this embodiment.This figure shows the results of a second test concerning the microorganisms contained in the agricultural composition according to this embodiment.This figure shows the results of a third test concerning the microorganisms contained in the agricultural composition according to this embodiment.This figure shows the results of the fourth test concerning the microorganisms contained in the agricultural composition according to this embodiment.This figure shows the results of the fifth test concerning the microorganisms contained in the agricultural composition according to this embodiment.This figure shows the results of the sixth test concerning the microorganisms contained in the agricultural composition according to this embodiment.This figure shows the results of the seventh test concerning the microorganisms contained in the agricultural composition according to this embodiment. <First Embodiment: Agricultural Composition> The following describes an agricultural composition according to the first embodiment of the present invention. First, the inventor will briefly explain the process by which he came to complete the agricultural composition according to this embodiment. Traditionally, compost, soil conditioners, and biopesticides utilizing microorganisms have been commercialized. For example, bacteria of the Bacillus family (formerly known as Bacillus) are common bacteria found in soil. Examples of Bacillus species used in agricultural compositions include *Bacillus pumilus*, *Bacillus amyloliquefaciens*, and *Bacillus oryzicola*. However, conventional agricultural compositions containing microorganisms still have room for further improvement. For example, while some microorganisms in agricultural compositions are known to promote the growth of specific plants, there is a problem in that the types of plants for which this growth-promoting effect is limited. Furthermore, with conventional agricultural compositions containing microorganisms, the microorganisms applied to the soil do not establish themselves in the soil, preventing them from fully exerting their growth-promoting effect on plants, or even if they do, the effect is not sufficiently sustained. Additionally, because there are so many types of microorganisms, there are undiscovered microorganisms that are useful in agricultural compositions, as well as microorganisms that are already known but whose usefulness in agricultural compositions has not yet been verified. In view of the above-mentioned problems, the inventors discovered a microorganism capable of resolving these problems and verified its usefulness as an agricultural composition, thereby completing the agricultural composition according to this embodiment. The agricultural composition according to this embodiment contains microorganisms of the genus Neobacillus. More specifically, the microorganism contained in the agricultural composition according to this embodiment is the species Neobacillus cucumis. More specifically, the microorganism contained in the agricultural composition according to this embodiment is strain B20 of Neobacillus cucumis. Hereinafter, unless otherwise specified, the microorganism contained in the agricultural composition according to this embodiment will be referred to as "strain B20". The agricultural composition according to this embodiment has the advantage of easily promoting plant growth due to the presence of the above-mentioned microorganisms. Strain B20 was deposited on March 3, 2025, at the Patent Microorganism Depositary Center (NPMD) of the National Institute of Technology and Evaluation (NITE) (Room 122, 2-5-8 Kazusa-Kamatari, Kisarazu City, Chiba Prefecture) under accession number: NITE P-04312. The B20 strain can be obtained, for example, from commercially available horticultural soil, from research institutions, or through screening from natural sources such as soil. The B20 strain can also be propagated by using PYAc medium as an agar medium or Y medium as a liquid medium, setting the pH of the medium to 6.47 before sterilization, sterilizing at 121°C for 20 minutes, and then performing aerobic culture with shaking at 30°C overnight. PYAc medium can be prepared by dissolving sodium acetate (2 g/L), yeast extract (2 g/L), and ag