不同生长时期丝栗栲林下土壤有机碳含量及矿化特征

巩晟萱; 王丹; 戴伟; 安晓娟; 刘浩宇

doi:10.13961/j.cnki.stbctb.2015.05.077

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不同生长时期丝栗栲林下土壤有机碳含量及矿化特征

试验研究

- 不同生长时期丝栗栲林下土壤有机碳含量及矿化特征
- Content and Mineralization Characteristics of Soil Organic Carbon Under Castanopsis Fargesii Forests in Different Growth Periods
- 水土保持通报 2015年35卷第5期页码：59-63
- 作者机构：
  
  1. 北京林业大学林学院,北京,100083
  2. 北京松山国家级自然保护区管理处,北京,102115
  3. 内蒙古乌海市农业产业化指导服务中心,内蒙古,乌海,016012
- 作者简介：
- 基金信息：
  
  科技部林业公益性行为科研专项项目"江西大岗山森林生态系统健康维护与经营技术研究"(200804022E);"十一五"国家科技支撑计划项目(2006BAD03A0702);国家自然科学资助项目(30590381);江西大岗山国家级森林生态站项目
- DOI：10.13961/j.cnki.stbctb.2015.05.077
  中图分类号：
- 纸质出版：2015
- 稿件说明：
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巩晟萱, 王丹, 戴伟, 等. 不同生长时期丝栗栲林下土壤有机碳含量及矿化特征[J]. 水土保持通报, 2015,35(5):59-63.

GONG Shengxuan, WANG Dan, DAI Wei, et al. Content and Mineralization Characteristics of Soil Organic Carbon Under Castanopsis Fargesii Forests in Different Growth Periods[J]. Bulletin of Soiland Water Conservation, 2015, 35(5): 59-63.
巩晟萱, 王丹, 戴伟, 等. 不同生长时期丝栗栲林下土壤有机碳含量及矿化特征[J]. 水土保持通报, 2015,35(5):59-63. DOI： 10.13961/j.cnki.stbctb.2015.05.077.

GONG Shengxuan, WANG Dan, DAI Wei, et al. Content and Mineralization Characteristics of Soil Organic Carbon Under Castanopsis Fargesii Forests in Different Growth Periods[J]. Bulletin of Soiland Water Conservation, 2015, 35(5): 59-63. DOI： 10.13961/j.cnki.stbctb.2015.05.077.

摘要

[目的] 分析土壤活性碳含量变化以及土壤有机碳的矿化特征

为今后深入了解掌握丝栗栲林下土壤有机碳的分解转化过程及其固碳潜力提供理论依据。[方法] 基于野外取样调查以及室内分析得出的有机碳数据

利用双指数模型法

在Origin 8.6软件支持下拟合出活性碳含量以及有机碳矿化过程及强度的时空变化特征。[结果] 土壤有机碳含量和活性碳含量均呈现明显的表层富集现象以及4月较低

8月最高

之后逐月降低的时间变化特点。土壤有机碳矿化强度虽然表现出与土壤有机碳和活性碳含量相同的垂直剖面特征和时间变化趋势

但其时间变化特征与土壤活性碳含量变化更为一致

只有0-20 cm表层土壤表现出显著性变化。[结论] 土壤有机碳矿化强度与微生物、温度和活性碳含量均达到极显著相关水平

但其时间变化特征与土壤活性碳含量变化更为一致

二者的关系更密切。

Abstract

[Objective] To analyze mineralization features and content of soil organic carbon in order to provide theoretical basis for future research on decomposition process and carbon sequestration capacity of soil under Castanopsis fargesii forests.[Methods] We obtained soil organic carbon data based on field investigation and laboratory analysis. The Origin 8.6 software was employed in the study. A double exponential model was used to investigate the spatial and temporal variation in activated carbon content and organic carbon mineralization intensity.[Results] Both of the soil organic carbon and activated carbon showed obvious surface enrichment

and this surface enrichment increased from the relative low in April to the highest in August

and then decreased gradually. The characteristics of vertical section and temporal variation in soil organic carbon mineralization intensity were similar to that in soil organic carbon and active carbon

and significant changes only occurred on topsoil at 0-20 cm.[Conclusion] Soil organic carbon mineralization intensity is significantly influenced by microbe

temperature and carbon content

and this influence is more significant in soil carbon content.

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