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题名: Characteristics of Soil and Organic Carbon Loss Induced by Water Erosion on the Loess Plateau in China
作者: Zhongwu Li1, 2, 3; Xiaodong Nie1, 2, 3; Xiaofeng Chang1; Lin Liu1; Liying Sun4
刊名: PLOS ONE
出版日期: 2016
卷号: 4, 期号:11, 页码:1-13
DOI: 10.1371/journal.pone.0154591
文章类型: Article
英文摘要: ; "> Soil erosion has been a common environmental problem in the Loess Plateau in China.
This study aims to better understand the losses of soil organic carbon (SOC) induced by
water erosion. Laboratory-simulated rainfall experiments were conducted to investigate the
characteristics of SOC loss induced by water erosion. The applied treatments included two
rainfall intensities (90 and 120 mm h-1), four slope gradients (10°, 15°, 20°, and 25°), and
two typical soil types- silty clay loam and silty loam. Results showed that the sediment OC
enrichment ratios (ERoc) in all the events were relative stable with values ranged from 0.85
to1.21 and 0.64 to 1.52 and mean values of 0.98 and 1.01 for silty clay loam and silty loam,
respectively. Similar to the ERoc, the proportions of different sized particles in sediment
showed tiny variations during erosion processes. No significant correlation was observed
between ERoc values and the proportions of sediment particles. Slope, rainfall intensity and
soil type almost had no impact on ERoc. These results indicate that the transportation of
SOC during erosion processes was nonselective. While the mean SOC loss rates for the
events of silty clay loam and silty loam were 0.30 and 0.08 g m-2 min-1, respectively. Greater
differences in SOC loss rates were found in events among different soil types. Meanwhile,
significant correlations between SOC loss and soil loss for all the events were observed.
These results indicated that the amount of SOC loss was influenced primarily by soil loss
and the SOC content of the original soil. Erosion pattern and original SOC content are two
main factors by which different soils can influence SOC loss. It seems that soil type has a
greater impact on SOC loss than rainfall characteristics on the Loess Plateau of China.
However, more kinds of soils should be further studied due to the special formation processes in the Loess Plateau.
收录类别: SCI
WOS记录号: WOS:000375211700109
通讯作者邮箱: lizw@hnu.edu.cn
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.iswc.ac.cn/handle/361005/7810
Appears in Collections:水保所科研产出--SCI_2016--SCI

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作者单位: 1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS and MWR, Yangling, Shaanxi Province, 712100, PR China
2.College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China
3.Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
4.ey Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, PR China

Recommended Citation:
Zhongwu Li,Xiaodong Nie,Xiaofeng Chang,et al. Characteristics of Soil and Organic Carbon Loss Induced by Water Erosion on the Loess Plateau in China[J]. PLOS ONE,2016,4(11):1-13.
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