生态环境学报2012，Vol.21Issue(1)：44-48,5.
土壤有机碳初始积累过程及深度分异研究
A study on initial SOC accumulation and depth distribution
摘要
Abstract
Rules of soil organic carbon (SOC) cycles is a basic theory for the study on soil carbon pool. However, the initial accumulation process and depth distribution of SOC are still not clearly known, hi this study, we have observed the dynamics of SOC and its relative factors in incubation holes of three depths (20, 40, 60 cm), which were backfilled by mixture of soils and litter rags sampled from Robinia pseudoacacia forest in Ansai County, China, and took samples respectively in March, July and November, 2010. For samples with the depths of 20 cm and 40 cm, the values of SOC, POC, TN are highest in July but decrease in November, with a inverse states for DOC. Different from that of the 20 cm sample, the SOC value of the 60 cm sample decreases gradually in the process of incubation and the values of TN and POC have increase trends, DOC appears a high value in July. The correlations between SOC and DOC, DOC and TN increase with the increase of the depth of samples. During C accumulation, the SOC value increases at the beginning but decreases later, showing a self-modulation function. The DOC values show different sources in various soil layers, the SOC value suggests complex sources at 60 cm depth, where the production of litters decomposition has a limited effect.关键词
SOC/DOC/UV吸收值/POCKey words
SOC/ DOC/ UV-absorbance/ POC分类
农业科技引用本文复制引用
吕海波,梁宗锁..土壤有机碳初始积累过程及深度分异研究[J].生态环境学报,2012,21(1):44-48,5.基金项目
中国科学院知识创新项目(KZCX2-XB2-05-01) （KZCX2-XB2-05-01）
渭南师范学院科研计划项目(07YKZ056) （07YKZ056）
