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应用地统计学方法研究了山西省西南部襄汾县农田土壤的环境磁学和养分特征。结果表明:土壤低频磁化率、高频磁化率、频率磁化率、pH值、有机质、全氮和全钾平均含量分别为92.54×10-8 m3.kg-1、86.93×10-8m3.kg-1、6.03%、8.26、1.94%、1.02g.kg-1和2.39%;变异函数分析显示,土壤低频磁化率的空间相关距离最大为14.33km,说明在一个较大的距离范围内存在空间相关性;块金系数比为23.41%,说明土壤磁化率主要取决于土壤母质、土壤性质、地形等结构因素。耕作和施肥等人为活动虽对土壤磁化率有一定的影响,但未改变其原有空间结构。本结果揭示土壤磁化率和养分的空间分布规律,为农田土壤环境质量评价和管理提供重要依据。
The geomagnetic and nutrient characteristics of farmland soil in Xiangfen County, southwestern Shanxi Province were studied using geostatistics. The results showed that the soil low frequency magnetic susceptibility, high frequency magnetic susceptibility, frequency magnetic susceptibility, pH, organic matter, total nitrogen and total potassium were 92.54 × 10-8 m3.kg-1,86.93 × 10-8m3.kg- 1,6.03%, 8.26,1.94%, 1.02g.kg-1 and 2.39%, respectively. The analysis of variance showed that the spatial correlation of soil low frequency susceptibility was 14.33km, indicating that there was spatial correlation within a large range The ratio of gold to gold is 23.41%, indicating that the magnetic susceptibility of soil mainly depends on the structural factors such as soil parent material, soil properties and topography. Although human activities such as farming and fertilization have a certain impact on soil magnetic susceptibility, they have not changed their original spatial structure. The results revealed the spatial distribution law of soil magnetic susceptibility and nutrient, which provided an important basis for farmland soil environmental quality evaluation and management.