阔叶林土壤有机碳特征及其与土壤性质的关系  

Variation characteristics of soil organic carbon and its relationship with physico-chemical properties in several broad-leaved forest soils in Beijing mountain area

作　　者：尹其悦[1] 王登芝[1] 王乐乐[2] 安晓娟[1] 李萍[3] 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]北京市农林科学院,北京100089 [3]北京市农业局土肥站,北京100080

出　　处：《河北林果研究》2013年第2期122-127,共6页Hebei Journal of Forestry and Orchard Research

基　　金：北京市教育委员会共建项目专项资助

摘　　要：对北京燕山山脉的黑桦林、刺槐林、板栗林、槲树林和山杨-白桦林5种阔叶林土壤有机碳变化特征进行了研究,并运用相关分析方法探讨了土壤有机碳与不同土壤性质的关系。结果显示,山杨-白桦林土壤剖面内有机碳的垂直变异性最高为77.01%,板栗林层间变异程度最低为36.36%;同一土层不同森林类型间的土壤有机碳含量表现出明显的变异特征,但其变异性随深度的增加而减小;在不同土层中,土壤有机碳与土壤因子的相关性不尽一致。在整个土壤剖面中土壤有机碳与土壤密度呈显著负相关,与土壤总孔隙度、毛管孔隙度、非毛管孔隙度呈显著或极显著正相关。同时土壤有机碳含量与土壤全氮、有效磷、土壤铁含量具有极显著正相关关系,与速效钾具有显著相关关系。Five broad-leaved plantations （Betula dahurica , Robinia pseudoacacia , Castanea mollissima, Quercus dentate, mixed Betula platyphylla Populus davidiana ） in Beijing mountain area were selected to study the variation characteristics of soil organic carbon （SOC）. The relationship between SOC and other soil properties was examined by correlation analysis. The results showed that the highest vertical coefficient variation （cv） of organic carbon content in the soil profile was 77.01% for Betula platyphylla-Populus davidiana mixed plantation, and the lowest cv was 36.36% for Castanea mollissima plantation, with- out similar correlations between SOC content and these soil properties in different soil lay- ers. In the whole soil profile, the SOC content was found to have very significant correla- tions with soil density, with very significant or significant positive correlations with total po- rosity, capillary porosity and non-capillary porosity. Moreover, the correlations between SOC and total nitrogen, available phosphorus, available potassium and iron content are very significant or significant positive.

关 键 词：阔叶林 土壤有机碳 土壤性质 

分 类 号：S714[农业科学—林学]