东北阔叶红松林腐殖质层土壤阳离子交换性能及其主要影响因素

Soil cation exchange capacity and its main impact factors in the humic layer of broadleaved Korean pine forest in northeast China

阔叶红松林是中国东北地区的典型地带性植被,生物多样性丰富,是我国重要的生态资源。本文分析了9个纬度阔叶红松林腐殖质层土壤交换性Ca、Mg、K、Na、有效阳离子交换量(ECEC)、交换性酸等的分布及其主要影响因素。结果表明,腐殖质层土壤具有较强的盐基元素生物富集功能;土壤交换性盐基离子和ECEC纬度分异不明显;年均温或年均降水量影响土壤交换性Mg和K含量。土壤有机质和p H是交换性盐基离子和ECEC分布的主导影响因素,且均为正向影响。土壤交换性酸含量与ECEC、p H呈极显著负相关关系。

Broad-leaved Korean pine（ Pinus koraiensis） forest,a typical zonal vegetation in northeast China,harbors high biodiversity and is an important ecological resource. This study focused on the distribution of soil exchangeable cations Ca,Mg,K and Na,effective cation exchange capacity（ ECEC）,and exchangeable acidity as well as its main driving factors in the humic layer of the broad-leaved Korean pine distribution zone across nine degree of latitudes in northeast China. Results showed that the humic layer soils were biologically enriched with basal elements. The concentrations of soil exchangeable cations and ECEC had no obvious latitudinal variation. The concentration of exchangeable Mg and K were related with mean annual temperature or mean annual precipitation. Soil organic matter and p H were the two driving factors with positive effects on the distributions of base cations and ECEC. Soil exchangeable acidity was negatively correlated with ECEC and p H.