红松人工林土壤阳离子交换量空间分布及其组成演变

Spatial distribution and compositional evolution of soil cation exchange capacity in Pinus koraiensis plantation

摘要: 以长白山红松人工林为研究对象,运用对比分析方法,对不同林龄红松人工林土壤阳离子交换量空间分布及其组成进行研究。结果表明:红松人工林土壤阳离子交换量和盐基饱和度均随着林龄增加而减小;土壤交换性氢和交换性铝离子含量则相反,随林龄增大而增加;土壤阳离子交换量、交换性钙、镁离子含量表层大于底层,土壤阳离子交换量及其组成根际土壤大于非根际土壤;土壤阳离子交换量、交换性钙、交换性镁、交换性钠红松阔叶混交林大于红松人工林。

Abstract: Pinus koraiensis plantation in Changbai Mountain was regarded as research object in this paper.Spatial distribution and compositional evolution of soil cation exchange capacity(CEC) in Pinus koraiensis plantation were studied by the methods of comparison and analysis.The result showed that soil CEC and base saturation pencentage in Pinus koraiensis plantation decreased with the age going on,but the contents of exchangeable H+ and Al3+ were opposite.The contents of CEC,exchangeable Ca²⁺+ and Mg²⁺+ in the surface layer were higher than those in the bottom.The contents and composition of CEC in rhizosphere soil were more than those in non-rhizosphere soil.The contents of CEC,exchangeable Ca²⁺+,Mg²⁺+ and Na+ in Pinus koraiensis broad-leaf mixed forest were higher than those in the Pinus koraiensis plantation.