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	Influence of soil structure on the shrinkage behaviour of a soil irrigated with saline-sodic water
	Peng, X; Horn, R; Deery, D; Kirkham, MB; Blackwell, J
刊名	AUSTRALIAN JOURNAL OF SOIL RESEARCH
	2005
卷号	43期号:4页码:555-563
关键词	soil shrinkage curve aggregate strength saline-sodic soil
ISSN号	0004-9573
DOI	10.1071/SR04116
通讯作者	Horn, R()
英文摘要	Soil structural properties of swelling/shrinking soils play an important role in assessing hydraulic properties. However, the effect of shrinkage/swelling processes on structure formation and strength especially in saline-sodic soils, such as a Typic Chromexert, has not yet been clarified. In this study, we investigate the changes in the shrinkage pattern after applying saline sewage water and use a 3-parameter sigmoidal curve model to fit its shrinkage data. Our aims were to determine the overall effect of sewage water application on soil structure and shrinkage processes after applying saline-sodic water and to evaluate soil shrinkage behaviour through parameters in relation to soil properties. Three plots within the FILTER Project, which were irrigated for summer and winter irrigated cropping with around 1000 m(3)/ha every 2 weeks with different saline sewage effluent concentrations for >5 years, were sampled from the top horizon to 1.00 m depth. The exchangeable sodium percentage is greatly decreased due to the application of low salt concentration except in the deep horizon. Soil structural properties such as aggregate strength and hydraulic properties are improved, especially in topsoil horizon. The stabilised soil structure reduces the volume change of structural shrinkage. Three parameters of the shrinkage model, defined as alpha, m, and n, present different physical meanings in relation to soil structure. Parameters a and m have similar functions, both a significantly exponential relationship with aggregate strength and a linear relationship with structural and residual shrinkages, whereas parameter n has a significantly linear relationship with aggregate strength and with the slope of the proportional shrinkage. The relation between parameters of the model and shrinkage behaviour facilitates the prediction of changes in porewater and soil structure and will be a useful tool for modelling water flow in non-rigid soils.
收录类别	SCI
WOS关键词	SWELLING SOILS ; VOLUME CHANGE ; CLAY SOILS ; CURVE
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	C S I R O PUBLISHING
WOS记录号	WOS:000230143300011
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558487
专题	南京土壤研究所
通讯作者	Horn, R
作者单位	1.CAU Kiel, Inst Plant Nutr & Soil Sci, D-24118 Kiel, Germany 2.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 3.CSIRO Land & Water, Griffith, NSW 2680, Australia 4.Kansas State Univ, Dept Agron, Manhattan, KS 66506 USA
推荐引用方式 GB/T 7714	Peng, X,Horn, R,Deery, D,et al. Influence of soil structure on the shrinkage behaviour of a soil irrigated with saline-sodic water[J]. AUSTRALIAN JOURNAL OF SOIL RESEARCH,2005,43(4):555-563.
APA	Peng, X,Horn, R,Deery, D,Kirkham, MB,&Blackwell, J.(2005).Influence of soil structure on the shrinkage behaviour of a soil irrigated with saline-sodic water.AUSTRALIAN JOURNAL OF SOIL RESEARCH,43(4),555-563.
MLA	Peng, X,et al."Influence of soil structure on the shrinkage behaviour of a soil irrigated with saline-sodic water".AUSTRALIAN JOURNAL OF SOIL RESEARCH 43.4(2005):555-563.

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