干旱区生态环境知识资源中心(Arid): Sustainability: A view from the wind-eroded field

Arid

DOI	10.1016/S1001-0742(07)60079-5
	Sustainability: A view from the wind-eroded field
	Andrew Warren
来源期刊	Journal of Environmental Sciences
ISSN	1001-0742
出版年	2007
卷号	19 期号:4 页码:470-474
英文摘要	This article explores the assessment of sustainability in fields subject to wind erosion. In the first part, simple sustainability audits are examined, as of soil depth and nutrients. Direct measurement of these characteristics has many problems, largely because of huge variability in space and time at all scales. Modelling still has its problems, but it may be possible to overcome many of them soon. It is true that wind erosion preferentially removes soil nutrients, but there are imponderables even here. The nutrient balance in many of these soils includes considerable input from dust. In West Africa, it has been shown that the amounts of calcium and potassium that are added in dust are sufficient to fertilize dispersed crops. In mildly acidic sandy soils, such as those found on the widespread palaeo-aeolian deposits, much of the phosphorus is fixed and unavailable to plants by the time it is removed by wind erosion, so that erosion has no added downside. Most of the nutrients carried by dust have been shown to travel close to the ground (even when they are attached to dust-sized particles), and so are trapped in nearby fallow strips, and are thus not lost to the farming system. Second, the sustainability of a whole semi-arid farming system is explored. Wind erosion in semi-arid areas (like China, the Sahel and Northwestern Europe) generally takes place on aeolian deposits of the recent geological past. Most of these soils are deep enough to withstand centuries of wind erosion before they are totally lost to production, and some of these soils have greater fertility at greater depth (so that wind erosion may even improve the soil). Finally some remarks are made about environmental change in relation to sustainability.
英文关键词	sustaninability wind erosion hutrient budget environmental change
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:2838969
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334939
作者单位	Andrew Warren, Department of Geography, University College London, England.
推荐引用方式 GB/T 7714	Andrew Warren. Sustainability: A view from the wind-eroded field[J],2007,19(4):470-474.
APA	Andrew Warren.(2007).Sustainability: A view from the wind-eroded field.Journal of Environmental Sciences,19(4),470-474.
MLA	Andrew Warren."Sustainability: A view from the wind-eroded field".Journal of Environmental Sciences 19.4(2007):470-474.

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