论文部分内容阅读
对鼎湖山亚热带森林土壤有机质（SOM）放射性碳进行了核爆效应校正。各层位年龄值与土壤深度呈线性递减，成壤过程是连续的，也是全新世时期的产物。五棵松剖面和坑口剖面成壤速率分别为0．0233cm／a和00488cm／a。成壤速率的差异可以用微地形和植被等主要因素的不同来解释。红壤有机物由活跃和稳定两种组分组成，其分解速率分别为0.25—0．57a-1和1．51×10－3—18×10-3a-1，平均滞留时间分别为1．8—4.0a和556-667a。
Nuclear detonation correction of soil organic matter (SOM) radioactive carbon in subtropical forest of Dinghushan was carried out. The age values of various layers decrease linearly with soil depth, and the pedogenesis process is continuous and also a product of the Holocene period. The soil forming rates of Wukesong section and pit section are 0.0233cm / a and 00488cm / a respectively. Differences in soil formation rates can be explained by differences in major factors such as microtopography and vegetation. The organic matter in red soil is composed of active and stable components with the decomposition rates of 0.25-0.57a-1 and 1.51 × 10-3-18 × 10-3a-1, respectively. The average retention times are 1.8- 4.0a and 556-667a.