气候变化领域集成服务门户(CCPortal): Effects of cover on soil particle and associated soil nutrient redistribution on slopes under rainfall simulation

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DOI	10.1007/s11368-018-2088-y
	Effects of cover on soil particle and associated soil nutrient redistribution on slopes under rainfall simulation
	Sun, Jiamei; Huang, Chi-hua; Han, Guannan; Wang, Yafeng
通讯作者	Wang, YF (通讯作者)
发表日期	2019
ISSN	1439-0108
EISSN	1614-7480
起始页码	729
结束页码	740
卷号	19 期号:2
英文摘要	PurposeSediment detachment, transportation, and deposition occurred alternately along slope during erosion process. Nutrients were mobilized with sediment movement. In this research, nutrients and fractal characteristics were analyzed on both bare and covered slopes. Then, combined with photogrammetry technique, soil elevation and associated soil nutrient redistribution on slope positions during rainfall event were explored.Materials and methodsCombined with simulated rainfall method, bare and covered slopes experienced erosion process. Fractal theory was used to analyze sediment particle size distribution. Photogrammetry technique was applied to locate sediment redistribution. Soil and runoff were sampled and analyzed to obtain nutrient variations.Results and discussionCovered slope yielded less runoff and sediment in comparison to bare slope. Compared to bare slope, covered slope had lower total nitrogen (TN) (p=4.8x10(-24)) and total phosphorus (TP) (p=2.9x10(-23)) concentration but higher total organic carbon (TOC) concentration (p=9.6x10(-10)). There was no significant difference between inorganic carbon (IC) concentrations on bare slope and covered slope (p=0.051). Fractal dimensions ranged from 2.16 to 2.37 on bare slope, and they were greater than those from covered slope (ranged from 1.63 to 2.26). Linear and exponential relationships were established between fractal dimension and TOC, IC, TN, and TP concentrations. TOC concentration and IC concentration were in negative correlations with fractal dimension, while TN concentration and TP concentration were in positive correlations with fractal dimension. Mean elevation change analyzed from photogrammetry was -4.9 and -1.2mm on bare slope and covered slope, respectively. Upslope sections were main elevation and nutrient loss areas. 9.8mm soil lost on bare slope and 2.8mm on covered slope. TOC, IC, and TP concentrations decreased on upper position, while TN increased. Three sections in middle area had dramatic erosion variations and decreased TOC. Elevation increased on covered slope in F3 section. On downslopes, IC content increased whereas TOC concentration increased. TN and TP content decreased in most sections on the bare slope, while the situation was changed on the filter covered slope, and TN and TP accumulated on the middle slope.ConclusionsCover reduced runoff and sediment yield rates, and it also reduced elevation decrease degree. There was significant sediment deposition in the middle slope. Cover had functions in reducing TOC loss degree and preventing TN and TP loss out from the slope, but there was no significant difference between IC concentrations on bare slope and covered slope.
关键词	SIZE DISTRIBUTION FRACTAL FEATURES RAINDROP IMPACT ORGANIC-MATTER SURFACE RUNOFF EROSION CARBON NITROGEN TRANSPORT MICROTOPOGRAPHY
英文关键词	Cover; Erosion process; Nutrition redistribution; Photogrammetry; Rainfall simulation; Soil fractal dimension
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Environmental Sciences ; Soil Science
WOS记录号	WOS:000457745700019
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259490
推荐引用方式 GB/T 7714	Sun, Jiamei,Huang, Chi-hua,Han, Guannan,et al. Effects of cover on soil particle and associated soil nutrient redistribution on slopes under rainfall simulation[J]. 中国科学院青藏高原研究所,2019,19(2).
APA	Sun, Jiamei,Huang, Chi-hua,Han, Guannan,&Wang, Yafeng.(2019).Effects of cover on soil particle and associated soil nutrient redistribution on slopes under rainfall simulation.JOURNAL OF SOILS AND SEDIMENTS,19(2).
MLA	Sun, Jiamei,et al."Effects of cover on soil particle and associated soil nutrient redistribution on slopes under rainfall simulation".JOURNAL OF SOILS AND SEDIMENTS 19.2(2019).