Comparison of rehabilitation treatments on mechanically reconstructed soils following strip coal mining activities: effects on soil properties

D. Beukes, LD Wiese-Rozanov, M. Kidson
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引用次数: 0

Abstract

A rainfed rehabilitation trial on mechanically reconstructed soil, following strip coal mining, was laid out in the Mpumalanga Province of South Africa. It was used to evaluate seven rehabilitation treatments with four different depths of topsoil on coal spoil over three experimental seasons. A strip plot design was used to apply the treatments. The test crop was a grass mixture comprising of annual and perennial species. Trial measurements included soil physical, chemical and microbiological measurements, as well as growth and composition of the grass stand. Monthly rainfall was very variable with annual totals below the long-term values. Statistical significance was proved for most measurements. Relatively high soil bulk densities, stratified with depth, were measured, indicating undesirable soil compaction. Infiltration rates increased while soil strength decreased dramatically with increased topsoil thickness. A reciprocal interaction of profile water content and biomass yield was observed with water content decreasing as biomass yield increased. A large variation in soil chemical properties was observed as a function of the treatments. This study highlights the fact that the monitoring of soil and plant properties should be a prerequisite in any rehabilitation study. Similar trials on different soils and in different rainfall regions should be considered to expand our knowledge of the impacts of different soil treatments in a range of ecosystems.
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带状煤矿开采后机械重建土壤修复措施的比较:对土壤性质的影响
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来源期刊
South African Journal of Plant and Soil
South African Journal of Plant and Soil Agricultural and Biological Sciences-Plant Science
CiteScore
1.90
自引率
11.10%
发文量
32
期刊介绍: The Journal has a proud history of publishing quality papers in the fields of applied plant and soil sciences and has, since its inception, recorded a vast body of scientific information with particular reference to South Africa.
期刊最新文献
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