广西大青山西南桦人工林土壤养分特征及其与立地生产力的关系

探讨西南桦人工林对土壤的适应性及土壤养分特征，揭示土壤养分状况与立地生产力的关系，为其 人工林养分管理提供参考。 广西大青山林区西南桦人工林内设置４７块６００ｍ２的典型样地，调 查常规测树因子，采集土壤样品，测定１０项常规土壤化学性质指标；按照土壤养分分级标准评价土壤养分状况，基于立地指数将样分为高产和低产组，进一步比较分析两组立地间各养分指标的差异性，探讨土壤养分对立地生生产力影响。

This study aims to investigate the soil adaptability and soil nutrient characteristics of Betula alnoides plantations, clarify the relationship between soil nutrient status and site productivity, and provide scientific references for nutrient management of such plantations. A total of 47 typical sample plots each covering 600 m² were established in the Betula alnoides plantations within the Daqingshan Forest Region, Guangxi. Conventional forest mensurational factors were surveyed, soil samples were collected, and 10 routine soil chemical property indices were determined. Soil nutrient status was evaluated in accordance with the soil nutrient classification standards. The sample plots were divided into high-yield and low-yield groups based on site index. Furthermore, the differences in each nutrient index between the two site groups were compared and analyzed, and the impact of soil nutrients on site productivity was explored.