地学前缘 ›› 2011, Vol. 18 ›› Issue (6): 1-10.

• 论文 •    下一篇

内蒙古中北部土壤碳库构成及其影响因素

 杨忠芳, 夏学齐, 余涛, 侯青叶, 冯海艳   

  1. 中国地质大学(北京) 地球科学与资源学院， 北京 100083
  • 收稿日期:2011-11-01 修回日期:2011-11-05 出版日期:2011-11-25 发布日期:2011-12-05
  • 作者简介:杨忠芳（1961—)，女，博士，教授，博士生导师，地球化学专业，主要从事土壤碳循环方向的研究。E-mail: zfyang01@126.com 内蒙古中北部土壤碳库构成及其影响因素
  • 基金资助:

    中国地质调查局地质调查项目“中国典型地区土壤碳汇源转化机理研究”(1212011087125);国土资源部公益性行业科研专项“中国主要农耕区土壤碳库与固碳潜力研究”(200911020)

Soil carbon pool in the northeast Inner Mongolia and its influencing factors.

  1. Yang Zhongfang,Xia Xueqi,Yu Tao,Hou Qingye,Feng Haiyan
  • Received:2011-11-01 Revised:2011-11-05 Online:2011-11-25 Published:2011-12-05

PDF (PC)

881

摘要：

采用网格采样法获取内蒙古中北部半干旱区土壤样品共527件，分析其碳库构成特征及其影响因素，并初步评估了未来气候变化背景下的碳库变化趋势。结果表明，研究区土壤碳库仍以有机碳为主，不同土壤类型中有机碳占总碳61%~97%，其中沼泽土有机碳密度最高，风沙土最低，盐土无机碳密度最高，暗棕壤最低；在空间分布上，土壤碳受气温和降水影响明显，其中有机碳随年平均气温升高而降低，随年降水增加而增加。而无机碳则相反，随年平均气温升高而升高，随年降水量的增加而降低。根据《IPCC2007报告》对21世纪末预测的气温和降水变化幅度估算，结果表明该区土壤碳库受气候变化的影响综合表现为碳密度的降低，平均幅度约为1.22 kg/m2。

关键词: 半干旱区；内蒙古, 土壤碳库, 全球变化

Abstract:

527 surface soil samples were collected and analyzed in the semiarid area in the northeast Inner Mongolia to investigate the distribution of the organic and inorganic carbon pool, its influence factors and to access the change of the carbon pool under the climate change. The results showed that the carbon pool in the study area is still dominated by the total organic carbon (TOC) with the variation of 61%-97% under different soil types. The spatial distribution of soil organic and inorganic carbon was controlled significantly by the climate conditions such as temperature and precipitation. Soil organic carbon has a trend of decreasing with mean annual temperature (MAT), but increasing with mean annual precipitation (MAP). However, soil inorganic carbon has an opposite trend of increasing with MAT and decreasing with MAP. Based on the extent of temperature and precipitation change predicted by IPCC 2007, the overall carbon density in 2090-2099 caused by the climate change will decrease by about 1.22 kg/m2.

Key words:  semiarid area, Inner Mongolia, soil carbon pool, global change

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