寒温带落叶松林不同林型土壤有机碳含量及相关性分析

Analysis on the relationship between soil organic carbon content and soil organic carbon in different leaves of larch in Alpine Region

本文以大兴安岭呼中国家级自然保护区四种主要落叶松林型为研究对象,分析了四种不同落叶松林型土壤有机碳的分布特征及其影响因素。将样地土壤分为A层(腐殖质层)与B层(土壤层)。结果表明,影响该地区土壤有机碳含量的主要因素为低地植被的种类与密度。四种落叶松林土壤有机碳含量大小关系为:泥炭藓-落叶松林>杜香-落叶松林>杜鹃-落叶松林>草类-落叶松林。A层各植被类型土壤有机碳含量为:杜香-落叶松林>泥炭藓-落叶松林>杜鹃-落叶松林>草类-落叶松林。B层各植被类型土壤有机碳含量为:泥炭藓-落叶松林>杜鹃-落叶松林>草类-落叶松林>杜香-落叶松林。四种林型中除杜鹃-落叶松林与草类-落叶松林在B层土壤有机碳含量上无显著差异,其余林型土壤有机碳含量差异均显著。土壤容重、土壤含水量与土壤有机碳之间有良好的相关性。结果表明土壤有机碳含量与土壤含水量表现为显著正相关(P<0.05),与土壤容重变现为显著负相关(P<0.05)。

This paper study on four species of larch forest in nature reserve, analyses distribution characteristics of soil organic carbon in different larch forest. The results show that the main factors that affect the soil organic carbon content in the area are the species and density of the lowland vegetation and the contents of organic carbon in soil of different larch forests were from big to small is Sphagnum larch, Ledum larch, Cuckoo larch, Grass larch.A layer of soil organic carbon content from large to small is Ledum larch, Sphagnum larch, Grass larch, Cuckoo larch. B layer of soil organic carbon content from large to small is Sphagnum larch, Cuckoo larch（A）, Grass larch（A）, Ledum larch. there were significant differences on the soil organic carbon content except for Cuckoo larch,Sphagnum larch the l soil soil volume weight, soil water content appeared to positively linearly correlate with soil organic carbon content. The result show that soil organic carbon content has positive correlation with soil water content and negative correlation with soil bulk density（P〈 0.05）.