赤峰市黄花甸子流域土壤有机碳含量的空间变异特征研究

选择内蒙古赤峰市敖汉旗黄花甸子流域为研究对象,运用地统计学和ArcGIS空间分析工具相结合的方法研究流域内土壤有机碳含量的空间变异特征以及土地利用方式对其的影响.结果表明,研究区0~10 cm土层范围有机碳含量具有中等空间相关关系,10~100 cm土层范围有机碳含量具有强烈空间相关关系,由随机性因素所引起的空间变异随土壤深度增加而降低.土地利用方式对土壤有机碳含量的影响随土壤深度的变化而发生改变,主要受植物根系分布特征的影响,各土层土壤有机碳平均含量由高到低表现为林地天然草地农地.

Spatial variations of organic carbon of Huanghuadianzi watershed in Chifeng

This study was conducted in Huanghuadianzi watershed in Aohan, Chifeng, Inner Mongolia. The Geo-statistical and ArcGIS spatial analysis techniques were used to study the spatial variations of soil organic carbon content. The results showed that the soil organic carbon content had moderate spatial correlation in 0~10 cm soil depth and strong spatial correlation in 10~100 cm soil depth. The spatial variation caused by random factors decreased with the increasing of soil depth. The influence of land use type on soil organic carbon content changed with soil depth, mainly affected by the root distribution of vegetation on ground. The average soil organic carbon contents in different land use types ranked as woodland > grassland > farmland.