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滇东地区土壤剖面氮同位素垂直分异及空间分异特征

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郭松, 王立发, 马海欧, 李双双, 蔡晓娟, 季宏兵. 滇东地区土壤剖面氮同位素垂直分异及空间分异特征[J]. 环境化学, 2018, 37(2): 279-286. doi: 10.7524/j.issn.0254-6108.2017061301
引用本文: 郭松, 王立发, 马海欧, 李双双, 蔡晓娟, 季宏兵. 滇东地区土壤剖面氮同位素垂直分异及空间分异特征[J]. 环境化学, 2018, 37(2): 279-286. doi: 10.7524/j.issn.0254-6108.2017061301
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GUO Song, WANG Lifa, MA Haiou, LI Shuangshuang, CAI Xiaojuan, JI Hongbing. Vertical distribution and spatial differentiation characteristics of nitrogen isotope in soil profile of Eastern Region of Yunnan Province[J]. Environmental Chemistry, 2018, 37(2): 279-286. doi: 10.7524/j.issn.0254-6108.2017061301
Citation: GUO Song, WANG Lifa, MA Haiou, LI Shuangshuang, CAI Xiaojuan, JI Hongbing. Vertical distribution and spatial differentiation characteristics of nitrogen isotope in soil profile of Eastern Region of Yunnan Province[J]. Environmental Chemistry, 2018, 37(2): 279-286. doi: 10.7524/j.issn.0254-6108.2017061301
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滇东地区土壤剖面氮同位素垂直分异及空间分异特征

  • 1.

    北京科技大学能源与环境工程学院, 北京, 100083;

  • 2.

    北京市地质工程设计研究院, 北京, 100120

  • 基金项目:

    国家自然科学基金（41473122）和科技部973项目（2013CB956700）资助.

Vertical distribution and spatial differentiation characteristics of nitrogen isotope in soil profile of Eastern Region of Yunnan Province

  • 1.

    Energy & Environment Engineering School, University of Science & Technology Beijing, Beijing, 100083, China;

  • 2.

    Beijing Institute of Geological Engineering Design, Beijing, 100120, China

  • Fund Project: Supported by the National Natural Science Foundation of China (41473122)and National Basic Research Program of China(2013CB56700).

  • 摘要: 选取云南石林县不同土壤类型、不同石漠化等级以及不同人为干扰方式影响下的7处典型的土壤剖面为研究对象，研究了剖面中氮同位素垂直分异及空间分异特征.结果表明，土壤中pH值为3.68—6.07，全部土壤剖面呈酸性，总有机碳（TOC）为0.58—29.25 g·kg-1，碳氮比（C/N）为1.33—14.70，δ15N介于1.44‰—14.86‰，在随深度的垂直分异中，受剖面中腐殖质层和硝化反硝化反应的影响，土壤中稳定氮同位素呈现一定的规律性变化.在各个剖面之间的空间分异中，两种不同土壤类型下δ15N值的分散程度均存在轻度石漠化剖面 > 中度石漠化剖面 > 强度石漠化剖面的规律.同时在受人为影响较小的红壤剖面δ15N值大致呈现强度石漠化剖面 > 中度石漠化剖面 > 轻度石漠化剖面的规律.采样区内无论是石灰岩土壤剖面还是红壤剖面δ15N值与土壤理化性质均无显著相关关系.
    Abstract: Seven typical soil profiles under the influence of different soil types,different rocky desertification levels and different human disturbance modes in Shilin County of Yunnan Province were selected as the object of study to investigate the vertical distribution and spatial differentiation of nitrogen isotopes. The results showed that the soil pH was 3.68 to 6.07,the total soil profile was acidic,the total organic carbon (TOC) was 0.58 g·kg-1 to 29.25 g·kg-1,the C/N ratio was 1.33 to 14.70, and δ15N was 1.44‰ to 14.86‰. In the vertical differentiation with depth,the stable nitrogen isotopein the soil showed some regular changes because of the humus layers and nitrification-denitrification. In the spatial differentiation between the profiles,the degree of δ15N dispersion in the two different soil types was mild rocky desertification profile > moderate rocky desertification profile > intensity rocky desertification profile. At the same time,the δ15N values of the red soil profile,which were less affected by man-made,showed the intensity of rocky desertification profile > moderate rocky desertification profile > mild rocky desertification profile. There was no significant correlation between δ15N and soil physical and chemical properties in both the limestone soil profile and the red soil profile.
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  • 收稿日期:  2017-06-13
  • 刊出日期:  2018-02-15

滇东地区土壤剖面氮同位素垂直分异及空间分异特征

  • 1.  北京科技大学能源与环境工程学院, 北京, 100083;
  • 2.  北京市地质工程设计研究院, 北京, 100120
  • 收稿日期:  2017-06-13
基金项目:

国家自然科学基金（41473122）和科技部973项目（2013CB956700）资助.

摘要: 选取云南石林县不同土壤类型、不同石漠化等级以及不同人为干扰方式影响下的7处典型的土壤剖面为研究对象，研究了剖面中氮同位素垂直分异及空间分异特征.结果表明，土壤中pH值为3.68—6.07，全部土壤剖面呈酸性，总有机碳（TOC）为0.58—29.25 g·kg-1，碳氮比（C/N）为1.33—14.70，δ15N介于1.44‰—14.86‰，在随深度的垂直分异中，受剖面中腐殖质层和硝化反硝化反应的影响，土壤中稳定氮同位素呈现一定的规律性变化.在各个剖面之间的空间分异中，两种不同土壤类型下δ15N值的分散程度均存在轻度石漠化剖面 > 中度石漠化剖面 > 强度石漠化剖面的规律.同时在受人为影响较小的红壤剖面δ15N值大致呈现强度石漠化剖面 > 中度石漠化剖面 > 轻度石漠化剖面的规律.采样区内无论是石灰岩土壤剖面还是红壤剖面δ15N值与土壤理化性质均无显著相关关系.

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