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。
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.
从不同环境中采集7份土壤样品用于芽孢杆菌的分离纯化，通过多次平板划线分离纯化得到30个菌落形态不同的菌株。
Strains of Bacillus spp. were isolated from 7 soil samples using repeated plate streaking, and 4 strains of them had rivalry ability to Fusarium oxysporum f. sp. cucumerinum.
划线后检查吃水标尺至平板龙骨之间的距离。
Inspection distance between draught marks and keel plate after marking out.
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