摘要
采用土壤剖面调查与室内分析相结合的方法,对河北省木兰林管局5种林分类型的土层厚度、体积质量、有机碳含量进行了测定,分析了土壤有机碳含量与碳密度的变化。结果表明:0～40 cm土层有机碳含量差异显著,可作为衡量土壤碳差异的指标;不同林分类型土壤碳密度排序为山杨林>落叶松林>白桦林>蒙古栎林>油松林;人工林土壤碳密度比天然林低11%以上;棕壤碳密度162.944 5 t/hm2、褐土碳密度103.040 7 t/hm2、草甸土碳密度298.019 8 t/hm2、风沙土碳密度98.809 6 t/hm2。
The changes in content of soil organic carbon were analysed and soil thickness,volume weight and soil organic carbon content of five forest types in the north of Yanshan Mountain were determined.The results showed that there was significant difference in soil organic carbon content from 0 cm to 40 cm soil layer,it could be used as an important index for measuring soil carbon;The soil carbon density in different types of forests could be arranged from high to low as Populus davidiana >Larix principis-rupprechtii >Betula puatyphlla >Quercus mongolica >Pinus tabulaeformis.The soil carbon density of plantations was 11% less than natural forests.The carbon density of brown soil,cinnamon soil,meadow soil and aeolian sand were 162.944 5t/hm2,103.040 7t/hm2,298.019 8t/hm2 and 98.809 6t/hm2 respectively.
出处
《林业科技开发》
2011年第6期47-50,共4页
China Forestry Science and Technology
基金
河北省林业局科技计划项目"孟滦林管局森林碳汇研究"(编号:0533301)
关键词
森林土壤碳密度
土壤有机碳含量
土壤类型
林分类型
carbon density of forest soil
soil organic carbon content: soil types
forest types
