中文摘要：

选用从内蒙古锡林郭勒天然草原冰草（Aqropyrom cristatum）根际分离获得的固氮菌株BC2进行室内接种效果研究。结果表明，接种BC2后冰草植株干质量增加，整个体系中固氮量比未接种冰草增加42．55mg／kg；土壤灭菌后接种效果更为明显，体系总氮含量增加80．95mg／kg，是未灭菌处理的近2倍；同时增加碳源于土壤可提高BC2的固氮效率。

英文摘要：

An experiment was conducted to determine the effect of inoculation of non-symbiotic azotobacteria Be2 isolating from wheatgrass （Agropyrorn cristaturn） on the growth and fixing nitrogen. The results of this study showed that BC2 inoculation increased the dry weight of wheatgrass and nitrogen-fixing capability with 42.55 mg/kg in the entire system when compared to the control. The effectiveness of inoculation was better due to soil sterilization and the total nitrogen content of sterilized soil with 80.95 mg/kg was twice of the unsterilized soil. This study also showed that BC2 inoculation improved the N fixation efficiency via increasing the soil carbon source.