坡面侵蚀土壤化学性质对磁化率影响机理的研究

研究了不同侵蚀强度下土壤磁化率及其与土壤化学性质的关系,结果表明:土壤pH、有机质含量和各形态氧化铁含量均与磁化率呈正相关,且氧化铁含量与磁化率呈极显著正相关,表明土壤不同形态氧化铁含量的多少是影响坡面土壤磁化率变化的关键因素。土壤侵蚀导致坡面物质的再分布,从而使土壤pH、有机质、氧化铁含量等土壤化学性质随之发生变化,这些因素随着侵蚀的强弱而发生变化,是影响坡面侵蚀土壤磁性变化的根源。

Affecting Mechanism of Slope Soil Eroded Chemical Characters to Susceptibility

The relationship between soil susceptibility and the soil chemical characters were studied,and find out the mechanism of soil susceptibility variation with soil erosion intensity.The soil susceptibility increases with the soil erosion decreasing,and at the same time,the content of organic materials and magnetism mineral content are adding.In this study,we find the content of free ferric oxide is main reason of causing the soil susceptibility variation.The mechanism of soil susceptibility variation is that soil erosion make the soil redistribution in the slope,and the soil chemical characters changed too,at the same time and then the soil susceptibility changed too.