燕山北部华北落叶松人工林与杨桦天然次生林土壤碳密度的比较  

Soil carbon content comparison between larch plantation and secondary poplar-birch forest in Northern Region of Yanshan Mountains

作　　者：王艳军[1] 徐国巧[1] 李亚男[2] 贾彦龙[3] 许中旗[2] 

机构地区：[1]河北省木兰围场国有林场管理局,河北围场068400 [2]河北农业大学林学院,河北保定071000 [3]中国科学院地理科学与自然资源研究所,北京100101

出　　处：《河北林果研究》2014年第3期237-240,共4页Hebei Journal of Forestry and Orchard Research

基　　金：河北省林业厅项目"木兰林区中幼龄林抚育经营技术及其效果研究(1217441)";河北省科技厅科技支撑项目"燕山北部山地典型森林生态系统碳汇功能及其对森林经营措施的响应(10236728)"

摘　　要：为了了解人工造林过程对土壤碳储量的影响,对燕山西部山地常见的华北落叶松人工林和杨桦天然次生林土壤有机碳含量进行了研究。结果表明,华北落叶松人工林和杨桦天然次生林的土壤剖面平均有机碳含量分别为30.45g/kg和28.45g/kg,二者没有明显差异;2种林分的土壤有机碳含量均随着土层深度的增加而降低,下降幅度则随深度的增加逐渐减缓,表层土壤对土壤的碳存储贡献更大。总的来看,土壤有机碳含量在深层(30cm以下)相邻土层之间差异不显著,说明深层土壤中,有机碳含量变化较小。由以上结果可以得出结论,在造林措施适当、人为干扰较少的条件下,人工林同样可以维持与天然林相近的较高的土壤碳储量。Soil organic carbon content （SOCC） of larch plantation and natural secondary pop-lar-birch forest in west region of Yanshan Mountains was studied in this paper for under-standing the effects of afforestation over soil organic carbon stock .The results showed that SOCC of larch plantation （ 30 .45 g/kg ） was higher than that of secondary poplar-birch forest （ 28 .45 g/kg ） .The SOCC of the both forests decreased with the soil depth .At the same time ,there was significant difference of SOCC between adjacent layers in upper soil but not in lower soil by variance analysis .It was concluded that under proper afforestation meas-ures and less human disturbance ,the plantation could maintain high soil organic carbon stock as natural forests .

关 键 词：人工林 天然次生林 土壤有机碳含量 土壤碳密度 

分 类 号：S714[农业科学—林学]