盐基离子在缓和土壤酸化调节土壤肥力方面发挥关键作用,森林土壤盐基离子的多寡往往受到树种的影响。对比了同质园中5个亚热带常见树种(火力楠、马尾松、米槠、木荷和杉木)对土壤盐基离子的影响。结果表明:树种对土壤钠离子含量影响不大,但是对土壤钾离子、钙离子、镁离子含量有显著影响,表现为杉木林普遍较低、火力楠和马尾松则较高,而且土壤钙离子、钠离子和镁离子与土壤pH值之间呈显著的正相关。因而在土壤酸性较强且贫瘠的亚热带区域造林可推荐营造火力楠和马尾松人工林。

Base cations are the key to mitigating soil acidification and regulating soil fertility,whose amounts in forest soils were usually affected by tree species.Effects of five common subtropical tree species (including Cunninghamia lanceolata (Lamb.) Hook.,Pinus massoniana Lamb.,Schima superba Gardn.et Champ.,Michelia macclurei Dandy,Castanopsis carlesii) in a common garden on soil base cation concentration were investigated in this study.We found tree species had no effects on soil Na⁺ concentration but significant effects on soil K⁺,Ca²⁺,Mg²⁺ concentration,with a lower soil K⁺,Ca²⁺,Mg²⁺ concentration in Cunninghamia lanceolata (Lamb.) Hook.plantation and a higher value in Michelia macclurei Dandy and Pinus massoniana Lamb.plantation.The soil Ca²⁺,Na⁺,Mg²⁺ concentration increased significantly with soil pH.Our study suggested that Michelia macclurei Dandy and Pinus massoniana Lamb.should be highly recommended to be planted in acid and nutrient-poor soil in subtropical China.