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吉林西部草原以羊草为主,土壤碱性大,气候干燥,土质瘠贫。在这样的草原上,欲提高牧草产量和质量,必须从多方面进行探讨。本研究的目的在于通过调查,搞清根际固氮微生物的种类、分布、数量、固氮活性
The western part of Jilin grassland is dominated by Leymus chinensis, with large alkaline soil, dry climate and poor soil quality. In such grasslands, in order to improve the yield and quality of pasture, we must study from many aspects. The purpose of this study is to investigate the species, distribution, quantity, nitrogen fixation activity of nitrogen-fixing microorganisms in rhizosphere