Erosion and Soil Productivity Relationships for an Oxisol in the Eastern Plains of Colombia

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外文摘要：The impact of erosion on soil productivity was assessed for a Typic Hapludox on the Eastern Plains of Colombia (EPOC). An experiment was initiated in 1997 on a site with a known history of prior erosion in order to determine primarily the effect of differing degrees of soil erosion on the current soil quality status and to assess the impact on soil productivity through its effect on current yield of an upland rice crop (Oryza sativa). The results demonstrate that the influence of erosion on crop productivity is complex and simple relationships with changes in soil quality variables and with crop yields may often be confounded by other factors. Yet, EPOC's Oxisols are still shown to be extremely vulnerable to water erosion and illustrate the risk of converting savannas to croplands without appropriate soil management practices.

外文关键词：

soil erosionsoil productivity

作者：

F. Obando、M. Stocking

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作者单位：

Universidad de Caldas, Departamento de Recursos Naturales y Medio Ambiente, Calle 65 No. 26-10, A.A. 275, Manizales, Colombia

会议名称：

Sustainable Utilization of Global Soil and Water Resources vol.2: Process of Soil Erosion and Its Environment Effect

会议地点：

Beijing(CN)

会议母体文献：

International Soil Conservation Organization Conference vol.2; 20020526-31; Beijing(CN)

页码：

P.285-290

出版时间：

2002