A strain of Bradyrhizobium elkanii and its application

By isolating and identifying the RY8 of the Elzeni slow rhizobacterium RY8 from Hainan soybean plants, the problem of insufficient nitrogen fixation rhizobacterium in soybean planting in Hainan was solved, and the soybean yield and soil nitrogen content were significantly improved. It is suitable for acidic soil conditions and does not pollute the environment.

CN115838655BActive Publication Date: 2025-04-01TROPICAL CORP STRAIN RESOURCE INST CHINESE ACAD OF TROPICAL AGRI SCI
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Patent Information

Application Number
CN202210910349.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-07-29
Publication Date
2025-04-01
Estimated Expiration
2042-07-29

AI Technical Summary

Technical Problem

The lack of nitrogen-fixing rhizobia suitable for soil and climatic conditions in soybean cultivation in Hainan has led to the application of urea to provide a nitrogen source, affecting soybean production and soil health.

Method used

A plant of Elzeni Ryutobiosis RY8 was isolated from Hainan soybean plants. It was determined through culture and identification and its optimal growth conditions and characteristics were used as a nodular nitrogen fixation bacteria in soybean cultivation.

Benefits of technology

The RY8 strain significantly increases the yield and plant nitrogen content of soybeans, promotes soybean growth, is suitable for acidic soil conditions, does not pollute the environment, improves the rhizobium population in the soil, and promotes the nodule and nitrogen fixation of soybeans.

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Abstract

The present invention discloses a Bradyrhizobium elkanii and its application. The RY8 strain of Bradyrhizobium elkanii has been deposited in the China Center for Type Culture Collection on April 28, 2021, with the deposit number of CCTCC NO: M 2021480. The research of the present invention shows that after the rhizobium RY8 is grafted back into soybeans, the biomass and yield of the plants can be significantly increased; at the same time, it also has the ability to secrete auxin, and the amount of IAA secreted is significantly better than other growth-promoting rhizobia, and has a significant growth-promoting effect on soybeans. The RY8 strain has a strong ability to infect nodules, and can significantly promote plant growth after soybean inoculation. It also has a strong acid resistance and is suitable for inoculation in acidic soils. It promotes the nodulation and nitrogen fixation of soybeans, and is harmless to humans, animals and plants, and will not pollute the environment.
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