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

孙 凡<sup>1; 2</sup>; 严思维<sup>1; 2</sup>; 林勇明<sup>1; 2*</sup>; 陈爱民<sup>1; 2</sup>; 邓浩俊<sup>1; 2</sup>; 杜 锟<sup>1; 2</sup>; 吴承祯<sup>1; 2; 3</sup>; 洪 伟<sup>1; 2</sup>

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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
孙凡^1,2, 严思维^1,2, 林勇明^1,2*, 陈爱民^1,2, 邓浩俊^1,2, 杜锟^1,2, 吴承祯^1,2,3, 洪伟^1,2
1. 福建农林大学林学院, 福州 350002;2. 福建省高校森林生态系统过程与经营重点实验室, 福州 350002;3. 武夷学院生态与资源工程学院, 福建南平 354300

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(P<0.05),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(P>0.05),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(P<0.05),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(P<0.01),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(P>0.05)。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(P<0.01),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(P<0.05)。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。

关键词: 汶川地震, 土壤有机碳密度, 不同气候区, 土壤有机碳含量

DOI：10.11931/guihaia.gxzw201701002

分类号:Q948

文章编号:1000-3142(2017)12-1498-10

Fund project:国家自然科学基金(41201564)[Supported by the National Natural Science Foundation of China(41201564)]。

Distribution characteristics of soil organic carbon storage and carbon density from damaged vegetation under different climate types in Wenchuan earthquake region

SUN Fan^1,2, YAN Si-Wei^1,2, LIN Yong-Ming^1,2*, CHEN Ai-Min^1,2, DENG Hao-Jun^1,2, DU Kun^1,2, WU Chen-Zhen^1,2,3, HONG Wei^1,2

1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;2. Key Laboratory for Forest Ecosystem Process and Management of Fujian Province, Fuzhou 350002, China;3. College of Ecology and Resource Engineering, Wuyi University, Nanping 354300, Fujian, China

Abstract:

Taking typical regions affected by Wenchuan earthquake as research area including semi-arid dry warm river valley and subtropical humid monsoon climates, we set up the undestroyed region(UR)and destroyed and treated region(DR)as sampling plots. We determined soil water content, bulk specific gravity and organic carbon(soil organic carbon, SOC)content in different levels(0-5, 5-10, 10-20 cm). We analyzed the distribution characteristics between undestroyed region and destroyed and treated region in different climatic regions. The results were as follows:(1)SOC content of each soil layer in UR was significantly higher than that of DR in two typical climatic regions(P<0.05), while SOC increased first and then decreased with the soil depth. The SOC content in different soil layers in the same climatic region had no significant difference(P>0.05)with a fluctuated trend.(2)SOCD in UR was significantly higher than that in DR(P<0.05)and increased with the soil depth. It did not show significantly different(P>0.05)in different soil layers in the same climatic region.(3)Treatments in both climatic regions significantly influenced SOC content, but the interaction between treatments and soil layers and the influence of different soil layers was not significant(P>0.05). Different treatments and soil layers as well as their correlation significantly influenced SOCD(P<0.01), the interation between treatments and climate types was significantly different(P<0.05). The results indicate that soil organic carbon content in destroyed and treated region is lower than that in undestroyed region. Our results will supply the data for evaluating the effects of ecological restoration measures.

Key words: Wenchuan earthquake, soil organic carbon density(SOCD), different climate types, soil organic carbon content