Effects of Vegetation Cover and Rainfall Intensity on Sediment-Bound Nutrient Loss, Size Composition and Volume Fractal Dimension of Sediment Particles

ISWC OpenIR > 水保所知识产出(1956---)

	Effects of Vegetation Cover and Rainfall Intensity on Sediment-Bound Nutrient Loss, Size Composition and Volume Fractal Dimension of Sediment Particles
	Zhang Guan-Hua; Liu Guo-Bin; Wang Guo-Liang; Liu, GB
	2011
发表期刊	PEDOSPHERE
卷号	21 期号:5 页码:676-684
摘要	Vegetation and rainfall are two important factors affecting soil erosion and thus resulting in nutrient loss in the Chinese Loess Plateau. A field experiment was conducted to investigate the effects of rainfall intensities (60, 100 and 140 mm h(-1) and vegetation (Caragana korshinskii) coverages (0%, 30% and 80%) on soil loss, nutrient loss, and the composition and volume fractal dimension of eroded sediment particles under simulated rainfall conditions. The results showed that vegetation cover, rainfall intensity and their interaction all had significant effects on sediment transport and the sediment-bound nutrient loss. Higher rainfall intensity and lower coverage led to higher sediment and nutrient losses. Positive linear relationships were observed between soil loss and nutrient loss. The treatments showed more significant effects on the enrichment ratio (ER) of nitrogen (ER(N)) than organic matter (ER(OM)) and phosphorus (ER(P)). Compared with the original surface soil, the eroded sediment contained more fine particles. Under the same coverage, the clay content significantly decreased with increasing rainfall intensity. The ER of sediment-bound nutrients was positively correlated with that of clay, suggesting that the clay fraction was preferentially eroded and soil nutrients were mainly adsorbed onto or contained within this fraction. There were increments in the fractal dimension of the sediment particles compared to that of the original surface soil. Moreover, the fractal dimension was positively correlated with clay, silt, and sediment-bound OM, N, and P contents, whereas it was negatively correlated with sand content. This study demonstrated that fractal dimension analysis can be used to characterize differences in particle-size distribution and nutrient loss associated with soil erosion.
关键词	Fractal Features Loess Plateau Particle-size Distribution Runoff Nutrients Simulated Rainfall
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/4679
专题	水保所知识产出(1956---)
通讯作者	Liu, GB
推荐引用方式 GB/T 7714	Zhang Guan-Hua,Liu Guo-Bin,Wang Guo-Liang,et al. Effects of Vegetation Cover and Rainfall Intensity on Sediment-Bound Nutrient Loss, Size Composition and Volume Fractal Dimension of Sediment Particles[J]. PEDOSPHERE,2011,21(5):676-684.
APA	Zhang Guan-Hua,Liu Guo-Bin,Wang Guo-Liang,&Liu, GB.(2011).Effects of Vegetation Cover and Rainfall Intensity on Sediment-Bound Nutrient Loss, Size Composition and Volume Fractal Dimension of Sediment Particles.PEDOSPHERE,21(5),676-684.
MLA	Zhang Guan-Hua,et al."Effects of Vegetation Cover and Rainfall Intensity on Sediment-Bound Nutrient Loss, Size Composition and Volume Fractal Dimension of Sediment Particles".PEDOSPHERE 21.5(2011):676-684.

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