Symbiotic nitrogen fixation of legumes with azotobacteria was a hot topic of scientific research, but less focus on alpine meadow community.
豆科植物的共生固氮作用一直是科学研究的热点问题，但在高寒草甸上研究的比较少。
The azotobacteria in the rhizosphere of Leymus chinensis and Agropyron mongolica were separateda, nd their activities were measured by the methods of dilution-plate method and etylene reduction assay.
利用平板划线法和乙炔还原法对羊草和冰草根际固氮菌进行分离和固氮活性的测定。
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