【摘要】 为了解桂东地区不同林龄肉桂（Cinnamomum cassia）人工林土壤养分状况，为肉桂主产区土壤养分管理和科学施肥提供科学依据，以9个不同林龄肉桂人工林为试验对象，采用全国第二次土壤普查养分分级标准和灰色关联分析法对土壤养分状况和土壤肥力进行评价。结果表明，不同林龄肉桂人工林的土壤均呈酸性或强酸性，全磷、有效磷、交换性钙、交换性镁和有效硼含量均处于极贫乏水平，速效钾、交换性锰含量均处于贫乏水平；有机质和全氮含量均处于中等水平；全钾和有效铜含量均处于中等偏下水平；有效锌含量处于中等偏上水平；碱解氮和有效铁含量均处于富或极富水平。土壤肥力关联度为0.395～0.671，平均值为0.527，土壤肥力总体属于Ⅳ级（差）水平。3个样点土壤肥力属于Ⅲ级（一般）水平，5个样点土壤肥力属于Ⅳ级（差）水平，1个样点土壤肥力属于Ⅴ级（极差）水平。土壤有机质、全氮、有效磷、有效硼和速效钾是影响肉桂人工林土壤肥力的主要因素。更多还原

【Abstract】 In other to understand soil nutrient status of Cinnamomum cassia plantations at different stand ages in eastern Guangxi and provide scientific basis for soil nutrient management and scientific fertilization in main C. cassia producing areas, taking nine C. cassia plantations as experimental objects, second national soil survey nutrient grading standard and grey correlation analysis method were used for soil nutrient status analysis and comprehensive evaluation of soil fertility. Results showed that soils of C. cassia plantations at different stand ages were acidic or strongly acidic. Contents of total P, available P, exchangeable Ca, exchangeable Mg and available B were at extremely poor levels. Contents of available K, exchangeable Mn were at poor levels. Contents of organic matter and total N were at middle levels. Contents of total K and available Cu were at below middle levels. Content of available Zn was at above middle level. Contents of alkali-hydrolyzed N and available Fe were at rich or extremely rich levels. Correlation degrees of soil fertility were 0.395 ～ 0.671 with average value of0.527. Soil fertility generally belonged to Grade Ⅳ(poor). Soil fertilities of 3 sample points belonged to GradeⅢ(general), 5 sample points belonged to Grade Ⅳ(poor), and 1 sample plot belonged to GradeⅤ(extremely poor). Organic matter, total N, available P, available B and available K were main factors affecting soil fertility.更多还原