Erosion and Deposition Effects of Soil Labile Organic Carbon in Loessal Soil

Jia Songwei; He Xiubin; Wei Fangqiang

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Erosion and Deposition Effects of Soil Labile Organic Carbon in Loessal Soil

- Erosion and Deposition Effects of Soil Labile Organic Carbon in Loessal Soil
- Bulletin of Soiland Water Conservation Vol. 26, Issue 2, Pages: 10-13(2007)
- 作者机构：
  
  1. 中国科学院山地灾害与地表过程重点实验室,四川,成都,610041
  2. 中国科学院水利部成都山地灾害与环境研究所,四川,成都,610041
  3. 中国科学院研究生院,北京,100039
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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Jia Songwei, He Xiubin, Wei Fangqiang. Erosion and Deposition Effects of Soil Labile Organic Carbon in Loessal Soil[J]. Bulletin of Soiland Water Conservation, 2007, 26(2): 10-13.
DOI：

Jia Songwei, He Xiubin, Wei Fangqiang. Erosion and Deposition Effects of Soil Labile Organic Carbon in Loessal Soil[J]. Bulletin of Soiland Water Conservation, 2007, 26(2): 10-13. DOI：

摘要

活性有机碳作为土壤有机碳中活性最强的部分

它比土壤有机碳更敏感于环境的变化。通过野外径流小区观测和室内分析

研究了侵蚀对土壤活性有机碳的影响。结果表明

土壤和泥沙中活性有机碳含量分别在0.15～0.34g/kg和0.28～2.92g/kg之间;坡度≤20°时

活性有机碳的流失量随着坡度的增加而增加;其富集比介于3.25～8.47

且随着侵蚀强度和坡度的增大均减小。泥沙中活性有机碳含量随着侵蚀强度的增加呈对数递减趋势

而活性有机碳流失程度则相反。

Abstract

Labile organic carbon( LOC) is the most active part of soil organic carbon

and it is more sensitive to environment change. This paper studied the effect of soil erosion on LOC with field run off??plot observation and laboratory analysis.Results show that the LOC content in soil ranged between 0.15 g/ kg and 0.34 g/ kg

and was between 0.28 g/ kg and 2.92 g/ kg in sediment.For a slope gradient less than 20

the amount of LOC loss in creased with increased slope gradient.The enrichment ratio of LOC ranged between 3.25 and 8.47

and was negatively related to erosion rate and slope gradient.The LOC content in sediment decreased prog ressively as a log arithm function with increased soil erosion rate

and the LOC loss degree linearly increased with increased soil erosion rate.

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