Plant growth-promoting rhizobacteria Gro (rahnella aquatilis) and application thereof

Abstract

The invention relates to plant growth-promoting rhizobacteria Gro (rahnella aquatilis) and application thereof. The plant growth-promoting rhizobacteria Gro is classified and named as rahnella aquatilis, and the preservation number is CGMCC NO.15411. The bacterial strain can produce heteroauxing at high yield; the effect that insoluble potassium-containing silicate is converted into soluble potassium salt is effectively achieved; the organic phosphorus is dissolved; meanwhile, the growth promoting characteristics of fixing nitrogen and generating ACC deaminase, gibberellin, siderophore and thelike are realized; the soil nutrients can be increased; the utilization rate of fertilizers is improved; the absorption of plants on the soil nutrients sis promoted; the bacterial strain can be particularly and successfully subjected to fix planting in cucumber and lettuce rhizosphere soil; the growth of cucumbers and lettuces is promoted; the yield is improved. The bacterial strain Gro has the relatively comprehensive growth promoting function; the IAA producing capability is high; the extreme environment such as acid and alkaline is resisted; high application potential is realized.

Description

technical field [0001] The invention relates to a microbial strain and the application of the strain, in particular to Lahnella aquatica Gro and its application in rhizosphere growth promotion. Background technique [0002] In 1904, Lorenz Hiltner first proposed the concept of rhizosphere, describing the special relationship between bacteria and legume roots. In 1978, plant growth-promotingrhizobacteria (PGPR) was first proposed, mainly referring to a type of bacteria living freely in the soil or attached to plant roots that can promote plant growth and its absorption and utilization of mineral nutrients. Produce metabolic substances to promote plant growth and development, increase crop yield, and inhibit harmful microorganisms to prevent and control diseases (Hussain S. et al., 1999; Kloepper J.W. et al., 1980; Malik K.A. et al., 1997; Schippers B. et al., 1987). PGPR has a variety of growth-promoting mechanisms for plants, mainly including: antagonizing pathogenic bacte...

AI Technical Summary

Problems solved by technology

[0007] The strains disclosed in the above patent documents all have a certain growth-promoting ability, but the growth-promoting indicators are not complete, and the output of prominent growth-promoting indicators is not high.

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