Rhizobium and application thereof

Abstract

The invention discloses a rhizobium and application thereof. The rhizobium provided by the invention is northern Mesorhizobium septentrionale CCBAU 03524, of which the preservation number in the China General Microbiological Culture Collection Center is CGMCC No.11015. Experiments show that the northern Mesorhizobium septentrionale CCBAU 03524 CGMCC No.11015 has important application value in promoting growth of astragalus plants and / or improving quality of astragalus and / or raising seedlings of astragalus plants; the promotion of the growth of astragalus plants is reflected as increase of the number of nodules and / or increase of dry weight of underground parts; the improvement of the quality of astragalus is reflected as increase of percentage of astragalus polysaccharide in astragalus root.

Description

technical field [0001] The invention relates to the field of microorganisms, in particular to a strain of rhizobia and its application. Background technique [0002] Rhizobia are nitrogen-fixing bacteria that can nodulate and symbiose with legumes. When rhizobia live in symbiosis with suitable legumes, the rhizobia fix nitrogen in the air as ammonia, thereby providing nitrogen nutrition to the legumes, and the legumes provide carbohydrates and energy to the rhizobia through photosynthesis, both form a good symbiotic relationship. [0003] Since there is mutual recognition between rhizobia and legumes, and this effect is affected by geographical environment and soil physical and chemical factors, it is necessary to select and breed rhizobia suitable for legumes and adapt to the environment in order to achieve the difference between the two. A symbiotic effect of mutual benefit. Planting legumes in soil that has never been planted with legumes requires inoculation of suitab...

AI Technical Summary

Problems solved by technology

Astragalus membranaceus is mostly planted in deserts and barren mountain areas with poor soil, and in these areas, artificial fertilization is required to promote the growth of Astragalus membranaceus, and there are many problems such as lack of fertilizer sources and difficulty in fertilization. At the same time, most of the planting areas are newly reclaimed There is a lack of matching rhizobia in the soil, and even if they exist, they are relatively small in number. Therefore, artificially cultivated Astragalus has problems such as less nodules, poor growth status, and low content of Astragalus polysaccharides.

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