【摘要】 为探究钙添加对林地土壤的改良效应，在杉木新造林地中分别按两种氮、磷肥量（N₁:50 kg/hm²,N₂:100 kg/hm²;P₁:50 kg/hm²,P₂:100 kg/hm²）与3种钙肥添加量（Ca₀:0 kg/hm²,Ca₁:100 kg/hm²,Ca₂:200 kg/hm²）开展组合施肥试验，测定土壤理化性质与有效养分元素含量，分析钙添加对林地土壤环境的影响。结果表明：钙添加可以显著降低土壤容重，提高土壤pH、含水率，以及有机质、碱解氮、速效钾、交换性钙和交换性镁含量，对土壤有效磷含量的影响因氮、磷施肥处理不同而异；方差分析表明，土壤容重、pH,以及有机质、碱解氮、有效磷、交换性钙和交换性镁含量等7个指标受到不同施肥因子的影响极显著并存在极显著交互作用，土壤含水率则受不同钙添加量的极显著影响。土壤理化性质与有效养分元素含量之间具有较强的正相关性。在传统氮、磷肥施肥基础上添加钙肥有利于改善杉木人工新造林地土壤环境，缓解土壤酸化及提高土壤有效养分供给，提高杉木人工林质量。更多还原

【Abstract】 Aimed to explore amelioration effects of calcium addition on forestry soil.Fertilization experiments were conducted in Cunninghamia lanceolata afforestation with two levels of nitrogen-phosphorus addition（N₁:50 kg/hm²,N₂:100 kg/hm²;P₁:50 kg/hm²,P₂:100 kg/hm²）and three levels of calcium addition（Ca₀:0 kg/hm²,Ca₁:100 kg/hm²,Ca₂:200 kg/hm²）.Soil physicochemical properties and contents of available nutrient elements were measured to analyze the impact of calcium addition on forest soil.The result showed soil bulk density decreased, while soil pH,soil moisture, alkaline hydrolyzable nitrogen, available potassium, exchangeable calcium, and exchangeable magnesium increased when being treated with calcium fertilization.But the impact of calcium addition on soil available phosphorus content varied with nitrogen and phosphorus fertilization treatments.Variance analysis demonstrated that 7 indicators including soil bulk density, pH, organic matter, alkaline hydrol-yzable nitrogen, available phosphorus, exchangeable calcium, and exchangeable magnesium were significantly influenced by different fertilization factors and exhibited significant interactions.Soil available potassium was significantly influenced by different calcium addition.There was a strong positive correlation between soil physi-cochemical properties and the content of available nutrient elements.Exogenous calcium addition based on traditional nitrogen-phosphorus fertilization is beneficial for improving the soil of Cunninghamia lanceolata artificial afforestation, which can mitigate soil acidification, enhance the supply of available soil nutrients, and promote the quality of Cunninghamia lanceolata plantations.更多还原