【摘要】 为了解基材质量的变化,选择修复0、3、6、9、12和15年的基材作为研究对象,分析其微生物量碳（MBC）、总有机碳（TOC）及其氧化有机碳组分（F₁:极易氧化有机碳;F₂:容易氧化有机碳;F₃:较易氧化有机碳;F₄:难氧化有机碳）含量随修复年限的动态变化特征.结果显示:（1）基材TOC含量在修复早期下降显著,随年限增加略有升高,其后呈下降趋势,最后趋于稳定.（2）修复9年的基材氧化有机碳组分F₁、F₂和MBC显著大于12年和15年;并且从修复9年至15年,F₁、F₂和F₃组分占TOC的比例分别从32.14%、38.43%和20.07%下降至24.34%、22.59%和18.71%,F₄组分由9.99%增加至32.36%.（3）相关性分析结果表明TOC与F₁、F₂、F₃和F₄之间没有显著的相关性,而易氧化碳（ROC）与F₁、F₂和F₃之间具有显著的正相关性（P <0.05）;MBC与ROC、F₁和F₂都具有显著的正相关性（P <0.05）.本研究表明随着修复年限增加,基材有机碳的内部循环会受到阻碍,基材氧化有机碳组分可有效反映基材质量变化.（图4表2参44）更多还原

【Abstract】 Studying the characteristics of soil oxidizable stable organic carbon in the substrate of eco-restoration of vegetation concrete from different restoration years is of great significance to understand the substrate quality over time. This study was designed to investigate the pH, moisture content, microbial biomass carbon（MBC）, total organic carbon（TOC）, and characteristics of oxidizable organic carbon fraction variations in different restoration years（0, 3, 6, 9, 12 and 15 years） for substrate of eco-restoration of vegetation concrete. The characteristics of oxidizable organic carbon fraction were categorized as F₁: very labile fraction of oxidizable organic; F₂: labile organic carbon; F₃: less liable fraction of oxidizable organic carbon;and F₄: non-labile fraction of oxidizable organic carbon. The results showed that: 1) The TOC of the substrate decreased in the early restoration stage, followed by a reduction, a subsequent increase and an equilibrium state with increasing restoration age. 2) The TOC showed no significant difference between restorations of 9 and 15 years, while the F₁, F₂, and soil MBC were significantly higher for restorations of 9 years than those for restorations of 12 and 15 years. Compared to the restorations of 15 years, the proportion of F₁, F₂, and F₃ in TOC for restorations of 9 years decreased from 32.14%, 38.43%, and 20.07% to 24.34%,22.59%, and 18.71%, respectively, while that of F₄ increased from 9.99% to 32.36%. 3) The correlation analysis indicated that TOC was not related to F₁, F₂, F₃, and F₄, while the readily oxidizable carbon（ROC） had a significant positive relation to F₁, F₂,and F₃（P < 0.05）. The MBC had a significant positive correlation with ROC, F₁, and F₂（P < 0.05）. The study showed that the internal circulation of the substrate organic carbon was increasingly hindered by repair aging. The oxidized organic carbon fractions of the substrate can adequately reflect the change of substrate quality.更多还原