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对毛赤杨根部结瘤固氮作用的调查测定表明，混生毛赤杨林分有增加土壤和相邻树种氮素的作用，固氮量与根瘤生物量成正比，根瘤量与苗木地径是指数曲线关系。
The investigation on the nodulation and nitrogen fixation in the roots of A. prunella showed that the mixed stands of Alnus cremastogyne increased nitrogen in the soil and the adjacent species, the amount of nitrogen fixation was proportional to the nodule biomass, and the nodule diameter and seedling diameter were exponential curve relationship.