摘要
为阐明小兴安岭3种原始红松林土壤有机碳变化特征及其影响机制,以沿海拔梯度分布的云冷杉红松林、椴树红松林和蒙古栎红松林为研究对象,采样分析了土壤总有机碳、易氧化碳、微生物生物量碳含量及土壤理化性质。结果表明：3种原始红松林土壤总有机碳、易氧化碳、微生物生物量碳含量均随土层加深而递减;蒙古栎红松林土壤总有机碳与易氧化碳含量最高,椴树红松林次之（仅10-20 cm土层土壤总有机碳低于云冷杉红松林,但差异不显著）,云冷杉红松林最低,这种趋势（蒙古栎红松林〉椴树红松林〉云冷杉红松林）同海拔梯度变化一致。不同林型土壤微生物生物量碳含量的差异在不同土壤层次有所不同,但差异均不显著;2种活性碳、总有机碳与土壤全氮、CN之间为显著（P〈0.05）或极显著（P〈0.01）正相关,与土壤密度呈极显著负相关（P〈0.01）。综上,3种原始红松林土壤有机碳含量的差异是森林类型、海拔、土壤环境等因素综合作用的结果。
To understand the characteristics of soil organic carbon and its correlations with soil properties in the three original Pinus koraiensis forest types in XiaoXing＇ an Mountains of northeastern China, Picea sp. - Abies sp.-Pinus koraiensis forests, Tilia sp.-Pinus koraiensis forests and Quercus mongolica-Pinus koraiensis forests along elevation gradient were selected for this study, and soil samples were analyzed for soil total organic carbon （TOC）, easily-oxidized carbon （EOC）, microbial biomass carbon （MBC） and basic properties. Results showed that the contents of soil TOC, EOC and MBC in the three forest types decreased with increase of soil depth. Exception of the depth of 10 - 20 cm, the soil TOC and EOC concentration ranged in order as follows： Quercus mongolica-Pinus koraiertsis forests 〉 Tilia sp.-Pinus koraiensis forests 〉 Picea sp.-Abies sp.-Pinus koraiensis forests, it had the same trend as elevation gradient. Soil MBC varied in different soil depths for the three forest types. Soil EOC, MBC and TOC were all significantly related to total N and C/N, and were negatively significantly related to soil bulk density. We concluded that the combined effects of forest type, elevation, and soil environment contributed to the differences in the soil organic carbon found across the three original P. koraiensis forest types.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2014年第5期33-38,共6页
Journal of Beijing Forestry University
基金
黑龙江省省院科技合作项目(HZ201211)
国家自然科学基金项目(41275154)
黑龙江省财政厅自拟项目"小兴安岭主要森林植被类型土壤活性有机碳研究"(2011年)
"948"国家林业局引进项目(2011-4-51)
关键词
云冷杉红松林
椴树红松林
蒙古栎红松林
土壤有机碳
Picea sp.-Abies sp.-Pinus koraiensis forests
Tilia sp.-Pinus koraiensis forests
Quercusmongolica-Pinus koraiensis forests
soil organic carbon
