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	Impacts of forest types on soil C, N and DOC loss in runoff in the laterite hilly region of southern China
	Sun L. Y.; Yang, F. T.; Wang, J. Y.; Fang, H. Y.; Qi, J. Y.
	2015
关键词	Reforestation Tree species Throughfall Soil organic carbon Runoff dissolved organic-carbon mid-subtropical china litter decomposition land-use cunninghamia-lanceolata nutrient return nitrogen pools loess plateau overland-flow stream water
英文摘要	Forest plantations significantly impact soil properties and hydrological processes. Field investigation was carried out to provide insight into the impacts of three forest types (Cunninghamia lanceolata, Pinus elliottii, and mixed forest of Schima superba and Cyclobalanopsis jenseniana) on soil organic carbon (SOC), total nitrogen (TN) and the removal of dissolved organic carbon (DOC) by runoff. SOC and TN contents were measured in soils (0-50 cm) under three forest types on both uphill and downhill. Runoff samples were collected and DOC concentrations were analyzed after 27 erosive rainfalls during the period of April 2011 to April 2012. Results showed that the lowest contents of SOC and TN in top soil layer (0-10 cm) were observed in pure C. lanceolata stands. Vertical distributions of SOC and TN in pure C. lanceolata and pure P. elliottii followed negative power functions on downhill (P < 0.005), while those in mixed S. superba and C. jenseniana followed negative exponential functions on downhill (P < 0.005). DOC concentrations showed no significant correlation with runoff, and the average values were following the order of mixed S. superba and C. jenseniana > C. lanceolata > P. elliottii in 27 erosion rainfall events. The runoff and DOC loss density (DOCld) showed significantly positive correlations with throughfall (P < 0.001) and their average values followed the same order as C. lanceolata > mixed S. superba and C. jenseniana > P. elliottii. The lowest SOC content and the highest DOCld value were observed in pure C. lanceolata stands, which should be well considered when the large-scale reforestation was conducted in the laterite hilly region of southern China.
出处	Environmental Earth Sciences
卷	74
期	2
页	1391-1402
收录类别	SCI
语种	英语
ISSN号	1866-6280
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38858]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Sun L. Y.,Yang, F. T.,Wang, J. Y.,et al. Impacts of forest types on soil C, N and DOC loss in runoff in the laterite hilly region of southern China. 2015.

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