汶川震区不同气候区受损植被土壤有机碳储量和碳密度分布特征

发布时间：2018-10-20 06:57

【摘要】：以汶川地震灾区半干旱干暖河谷气候区、亚热带湿润季风气候区未受损区(Undestroyed region,UR)与受损治理区(Destroyed and treated region,DR)为研究区,测定不同层次(0~5、5~10、10~20 cm)土壤的含水量、容重及有机碳含量,分析不同气候区UR与DR有机碳储量和有机碳密度(Soil organic carbon density,SOCD)的分布特征。结果表明:(1)UR各土层的SOC含量均显著高于DR(P0.05),并随土层深度递增呈先增后减趋势;同一处理不同土层间SOC含量差异均不显著(P0.05),但随土层加深有不同变化趋势。(2)UR各土层SOCD均显著高于DR(P0.05),并随土层深度递增呈增加趋势;同一处理不同土层间SOCD差异不显著,均随土层深度递增而增加。(3)方差分析显示,两个气候区不同处理对SOC含量的影响差异达到极显著水平(P0.01),但处理和土层的交互作用及不同土层对SOC含量的影响不显著(P0.05)。不同处理和不同土层以及二者的交互作用对SOCD的影响差异极显著(P0.01),其中处理与气候类型的交互作用对SOCD的影响差异达显著水平(P0.05)。这表明研究区内受损治理区土壤有机碳含量低于未受损区,定量化受损区与未受损区土壤有机碳差异,可为评价灾区生态恢复措施效益提供数据支撑。
[Abstract]:The soil moisture content, bulk density and organic carbon content of different layers (0 ~ 5 ~ 5 ~ 5 ~ 10 ~ 10 ~ 10 ~ (10 ~ 20 cm) were measured in the semiarid, dry and warm valley climatic area, subtropical humid monsoon climate (Undestroyed region,UR) and damaged governing area (Destroyed and treated region,DR) in Wenchuan earthquake disaster area. The distribution characteristics of UR and DR organic carbon storage and organic carbon density (Soil organic carbon density,SOCD) in different climatic regions were analyzed. The results showed that: (1) the content of SOC in each soil layer of UR was significantly higher than that of DR (P0.05), and with the increase of soil depth, the content of SOC increased first and then decreased; The content of SOC in different soil layers of the same treatment was not significant (P0.05), but there were different trends with the deepening of soil layer. (2) the SOCD of each soil layer of UR was significantly higher than that of DR (P0.05), and increased with the depth of soil layer, but the difference of SOCD between different soil layers of the same treatment was not significant. (3) Analysis of variance showed that the effect of different treatments on SOC content reached a significant level (P0.01), but the interaction between treatment and soil layer and the effect of different soil layers on SOC content was not significant (P0.05). The effects of different treatments, different soil layers and their interactions on SOCD were significant (P0.01), in which the interaction between treatment and climate type had significant effect on SOCD (P0.05). This indicates that the content of soil organic carbon in the damaged management area is lower than that in the undamaged area, and the quantitative analysis of the difference between the damaged and undamaged areas can provide data support for evaluating the benefit of ecological restoration measures in the disaster area.
【作者单位】：福建农林大学林学院;福建省高校森林生态系统过程与经营重点实验室;武夷学院生态与资源工程学院;
【基金】：国家自然科学基金(41201564)~~
【分类号】：S153.6

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