News Release

美国玉米带的土壤流失

Peer-Reviewed Publication

Proceedings of the National Academy of Sciences

A hilltop completely denuded of A-horizon soil in a field near Guthrie Center, IA.

image: A hilltop completely denuded of A-horizon soil in a field near Guthrie Center, IA. view more 

Credit: Image credit: Evan Thaler

使用对美国玉米带农业区卫星成像和激光雷达勘察的一项研究发现，尽管此前的估计提示了玉米带没有哪个部分失去了全部的富含有机物的表土，这组作者说，该地区大约35%自从欧洲人定居和农业启动以来很可能通过农业侵蚀失去了表土，导致了农作物产量相对于未退化土壤的产量降低了6%，以及年度经济损失大约28亿美元。

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Journal

Proceedings of the National Academy of Sciences

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