自然因子对中国森林土壤碳储量的影响分析  

Analysis on Effect of Nature Factors on Forest Soil Carbon Storage in China

作　　者：宋娅丽[1] 康峰峰[1] 韩海荣[1] 程小琴[1] 

机构地区：[1]北京林业大学林学院,北京100083

出　　处：《世界林业研究》2015年第3期6-12,共7页World Forestry Research

基　　金：国家林业局948项目(2010-4-15);国家林业公益性行业科研专项(201104008)

摘　　要：文中分析了森林植被、土壤属性、立地条件、气候条件以及凋落物和根系输入等自然因素对中国森林土壤碳储量的影响。森林植物种类组成决定了进入土壤的植物残体量和分解速率,导致土壤有机碳的含量及分布有很大差异。随着林龄的增加,土壤碳储量会呈现增加或产生波动2种情况。土壤理化性质影响土壤有机碳的含量,而土壤碳储量又影响着土壤结构、根系深度、土层特性、有效水分保持能力、土壤生物多样性等;海拔、坡度、坡向、坡位等立地条件对森林土壤有机碳储量的影响各不相同;温度、水分、CO2浓度等气候因子在森林土壤有机碳的蓄积过程中起着至关重要的作用;凋落物和根系对土壤的输入也可以改变土壤碳库。Forest soil carbon storage in China is greatly influenced by natural factors such as forest vegetation, soil properties, site conditions, climate conditions, and litter and root input. The composition of forest vegetation types determines vegetation residual volume in soil and its decomposition rate, which leads to significant variations in the content and distribution of soil organic carbon. With the increase of forest age- chronosequence, forest soil carbon storage increases or fluctuates. Soil physical and chemical properties affect the content of soil organic carbon, while soil carbon storage similarly affects soil structure, root depth, soil effective water capacity and soil biodiversity. Site conditions including altitude, slope gradient, slope direction and slope position also have different effects on forest soil organic carbon storage; climate factors including temperature, moisture and CO2 concentration play an important role in the accumulation process of forest soil carbon organic storage; soil input from litter and root system may change soil carbon pools.

关 键 词：森林土壤 碳储量 碳密度 影响因子 中国 

分 类 号：S714[农业科学—林学] S718.5