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	Eluviation of dissolved organic carbon under wetting and drying and its influence on water infiltration in degraded soils restored with vegetation
	Zhang, B; Peng, XH; Zhao, QG; Hallett, PD
刊名	EUROPEAN JOURNAL OF SOIL SCIENCE
	2004-12-01
卷号	55期号:4页码:725-737
ISSN号	1351-0754
DOI	10.1111/j.1365-2389.2004.00641.x
通讯作者	Zhang, B(bzhang@issas.ac.cn)
英文摘要	One mechanism in the restoration of severely degraded soil by vegetation might be the movement of dissolved organic carbon (DOC) to macropore and aggregate surfaces. We propose that this lowers the soil wetting rate and subsequently its slaking resistance by creating a partially hydrophobic surface. In this study, we determined how wetting and drying (w/d) cycles redistribute DOC to soil surfaces, and how DOC affects hydrophobicity where it accumulates, in relation to the soil surface area to volume ratio and to different types of vegetation planted to restore a severely degraded soil. Repacked soil cores that simulate different soil aggregate sizes were tested. The results showed that w/d cycles increase surface DOC concentration through a depletion of DOC in the interior of the soil. Correspondingly, w/d cycles enhanced hydrophobicity, measured as a water repellency index, R, from 1.5-2.3 to 3.6-7.6, the values affected significantly by the type of vegetation. This index (R) did not change for a control soil with no vegetation. The link between the amount of DOC and water repellency was weak (coefficient of determination r(2) = 0.06-0.26), indicating that DOC quality was probably more important than its quantity. Although increasing the core size resulted in a greater accumulation of DOC on the drying surface of the core, the impact of this on water repellency was minimal. Incubation caused a decrease in the amount of DOC, but had minimal influence on water repellency. This work improves the understanding of changes in soil wetting and soil stabilization under processes of natural weathering and vegetation restoration.
收录类别	SCI
WOS关键词	AGGREGATE STABILITY ; PARTICLE-SIZE ; ARABLE SOILS ; SANDY SOILS ; MATTER ; REPELLENCY ; HYDROPHOBICITY ; TEMPERATURE ; MANAGEMENT ; FRACTIONS
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	BLACKWELL PUBLISHING LTD
WOS记录号	WOS:000224921400009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558417
专题	南京土壤研究所
通讯作者	Zhang, B
作者单位	1.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 2.Scottish Crop Res Inst, Plant Soil Interface Programme, Dundee DD2 5DA, Scotland
推荐引用方式 GB/T 7714	Zhang, B,Peng, XH,Zhao, QG,et al. Eluviation of dissolved organic carbon under wetting and drying and its influence on water infiltration in degraded soils restored with vegetation[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2004,55(4):725-737.
APA	Zhang, B,Peng, XH,Zhao, QG,&Hallett, PD.(2004).Eluviation of dissolved organic carbon under wetting and drying and its influence on water infiltration in degraded soils restored with vegetation.EUROPEAN JOURNAL OF SOIL SCIENCE,55(4),725-737.
MLA	Zhang, B,et al."Eluviation of dissolved organic carbon under wetting and drying and its influence on water infiltration in degraded soils restored with vegetation".EUROPEAN JOURNAL OF SOIL SCIENCE 55.4(2004):725-737.

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