【摘要】 为给油茶（Camellia）林土壤质量提升和改善提供理论支撑，测定土壤pH值及有机质、全氮、全磷、全钾、水解氮、有效磷、速效钾、代换性钙、代换性镁、有效铜、有效锌、有效硼、有效铁和有效锰含量，采用主成分分析法和聚类分析法建立最小数据集，基于土壤质量指数（SQI）对油茶林土壤质量进行评价。结果表明，油茶林养分属于中等水平，土壤pH值为4.77，酸化现象明显。基于主成分分析法建立最小数据集的评价指标包括全氮、有效磷、代换性镁、有效铜和有效锰含量。基于主成分分析法建立最小数据集计算的油茶林SQI为0.249～0.684，均值为0.459，土壤质量等级以Ⅱ～Ⅴ级为主，无Ⅰ级土壤。与聚类分析法相比，基于主成分分析法建立最小数据集能提取大部分数据信息，可有效评价油茶林土壤质量。更多还原

【Abstract】 In order to provide theoretical support for enhancement and improvement of soil qualities of Youcha(Camellia) forests, soil pH and contents of organic matter, total nitrogen, total phosphorus, total potassium, hydrolyzable nitrogen, available phosphorus, available potassium, substitutional calcium, substitutional magnesium, available copper, available zinc, available boron, available iron and available manganese were determined. Principal component analysis(PCA) and cluster analysis(CA) were used to establish minimum data sets. Soil quality of Youcha forests was evaluated based on soil quality index(SQI). Results showed that nutrients in Youcha forests belonged to medium levels. Soil pH value was 4.77, with obvious acidification. Evaluation indexes in minimum data set established by PCA included contents of total nitrogen, available phosphorus,substitutional magnesium, available copper and available manganese. SQI of Youcha forests calculated by minimum data set established by PCA ranged from 0.249 to 0.684, with mean of 0.459. Soil quality level mainly distributed from Ⅱ to Ⅴ, without level Ⅰ. Minimum data set established by PCA could extract most of data information compared with CA and could effectively evaluate soil quality of Youcha forests.更多还原