【摘要】 [目的]探究晋西黄土区人工刺槐林群落结构与土壤理化性质的特征关系，分析刺槐纯林与刺槐混交林群落空间结构特征和土壤理化性质的关系，为晋西黄土区人工林营造及植被恢复与重建提供理论参考。[方法]以山西黄土区典型人工刺槐纯林和混交林为研究对象，通过野外实地调查，采用标准样地调查法，对刺槐纯林、油松+刺槐混交林、侧柏+刺槐混交林群落结构特征、土壤理化特征与二者相关性及影响因素进行了分析。[结果]（1）刺槐混交林的Margalef指数和Shannon-Wiener指数显著高于刺槐纯林（p<0.05）,Simpson指数和Pielou指数并未表现出显著差异（p>0.05）；刺槐混交林各植被层生物量显著高于刺槐纯林（p<0.05）。各人工刺槐林分均处于不稳定状态，刺槐混交林群落稳定性优于刺槐纯林。（2）刺槐混交林土壤有机碳、全氮、全磷、含水量均显著高于刺槐纯林（p<0.05），刺槐纯林各土层容重均高于刺槐混交林。（3）研究区人工刺槐林林下植物多样性指数、生物量与土壤养分、土壤水分显著相关，刺槐纯林各因子间的相关性均弱于刺槐混交林。[结论]刺槐混交林具有较高的林下植物多样性、灌草生物量和群落稳定性，可有效改善土壤理化性质。因此，在晋西黄土区未来的生态恢复过程中，营建方式建议采用刺槐混交林。更多还原

【Abstract】 [Objective] The study investigates the characteristic relationship between the community structure and soil physicochemical properties of Robinia pseudoacacia forest plantations in the loess region of western Shanxi Province and analyzes the relationship between the spatial structure characteristics and soil physicochemical properties of Robinia pseudoacacia pure and mixed forests, aiming to provide theoretical basis for forest plantation establishment and vegetation restoration and reconstruction in the loess region of western Shanxi Province.[Methods] Typical Robinia pseudoacacia pure forest plantations and mixed forests in the loess region of Shanxi Province were taken as the research objects. Field investigations were conducted using the standard plot survey method to analyze the community structure characteristics, soil physicochemical properties, and their correlations and influencing factors of Robinia pseudoacacia pure forests, Pinus tabuliformis+Robinia pseudoacacia mixed forests, and Platycladus orientalis+Robinia pseudoacacia mixed forests. [Results](1) The Margalef index and Shannon-Wiener index of the Robinia pseudoacacia mixed forests were significantly higher than those of pure forests(p<0.05), while the Simpson index and Pielou index showed no significant differences(p>0.05). The biomass of each vegetation layer in the mixed forests was significantly higher than that in pure forests(p<0.05).All Robinia pseudoacacia plantation stands were in an unstable state, and the stability of mixed forest communities was better compared to pure forests.(2) Soil organic carbon, total nitrogen, total phosphorus, and water content in the Robinia pseudoacacia mixed forests were significantly higher than those in pure forests(p<0.05), while the bulk density of each soil layer in pure forests was higher than in mixed forests.(3) In the study area, the understory plant diversity indices and biomass in the Robinia pseudoacacia forest plantations were significantly correlated with soil nutrients and water content, but the correlations among these factors in pure forests were weaker compared to mixed forests. [Conclusion] Robinia pseudoacacia mixed forests have higher understory plant diversity, shrub and herbaceous biomass, and community stability, and can effectively improve soil physicochemical properties. Therefore, Robinia pseudoacacia mixed forests are recommended for future ecological restoration projects in the loess region of western Shanxi Province.更多还原