关中西部黄土塬典型农耕地的粒度与磁性研究——以陕西长武地区为例

Study on Granularity and Magnetism of Representative Agricultural Cultivated Land in Western Guanzhong——Taking the Case of Changwu Area of Shaanxi Province

对陕西长武XCMD剖面进行了粒度和磁化率测量、分析,发现:(1)在整个剖面中,土壤质地都属于粉土。(2)磁化率与粒级<1μm的颗粒含量相关性不明显;与1～10μm粒级颗粒含量呈明显的正相关,与10～50μm及>50μm粒级颗粒含量呈负相关关系。(3)1～10μm粒级颗粒含量在一定程度上可以反映夏季风的强弱,而10～50μm及>50μm粒级颗粒含量可以在一定程度上可以反映冬季风的强弱。

By measuring and analyzing the granularity and magnetic susceptibility of the soil in XCMD profile of agricultural cultivated land in Changwu area of Shaanxi province,we found that：（1） the soil texture belonged to silt;（2） magnetic susceptibility was not obviously correlated with the content of particle whose granularity is less than 1 μm,was significantly positively correlated with the content of particle with 1～10 μm grain size,and was negatively correlated with the content of particle whose grain size is 10～50 μm or larger than 50 μm;（3） the content of particle with 1～10 μm grain size could reflect the strength of summer monsoon to a certain extent,while the content of 10～50 μm or 50 μm particle could reflect the strength of winter monsoon to a certain extent.