生态公益林土壤有机碳含量分布特征与环境因子的研究

基于生态公益林效益监测体系的建立,采用野外调查、取样和室内实验分析相结合的方法,研究浙西南庆元县公益林土壤有机碳含量分布特征及其影响因子,结果表明：①研究区公益林土壤有机碳平均含量为44.28 g/kg,不同森林类型土壤有机碳含量差异显著,土壤有机碳平均含量的变化趋势从大到小为：阔叶林、针阔混交林、松木林、杉木林、竹林,同一森林类型土壤有机碳含量变化很大.②不同林龄土壤有机碳含量呈极显著性差异,与林龄呈极显著相关,土壤有机碳含量随林龄增大而增加.③环境因子与土壤有机碳含量表现的相关性不同,生物量、枯枝落叶层厚度、海拔及土壤内在因子与土壤有机碳含量呈极显著或显著相关,各种环境因子交互作用,共同影响土壤有机碳含量.

Analysis on Soil Organic Carbon Content Distribution and Environmental Factors of Non-Commercial Forest

Based on the establishment of non-commercial forest monitoring system, adopting field investigation, sampling and laboratory analysis combined methods, the distribution characteristics and influencing factors of soil organic carbon content in Qingyuan County, southwest Zhejiang were analyzed. The results showed that （1） the average content of soil organic carbon is 44.28 g/kg, the differences in soil organic carbon content of different forest types is significant, the changing trend of average content of soil organic carbon： broad-leaved forest 〉 mixed forest 〉 pine forest of fir forest 〉 bamboo, changes in soil organic carbon content in the same forest types is great. （2） There is significant difference of soil organic carbon content in different age forest, and is significantly correlated with stand age, soil organic carbon content increases with forest age increased. （3） Environmental factors and soil organic carbon content indicates various correlation, biomass, litter thickness, altitude and soil inner factors show significant and extremely significant correlation with soil organic carbon content.