原创《基于地统计学耕层土壤有效态微量元素空间变异特征》：本论文可用于统计学论文范文参考下载，统计学相关论文写作参考研究。
摘 要：运用地统计学和ArcGIS技术相结合的方法,研究了威海市文登区农田土壤有效态微量元素的空间变异分布特征.统计分析结果表明,有效B、Fe、Mn、Cu 和 Zn 符合对数正态分布,土壤中有效态微量元素含量均在正常范围之内,总体偏低.土壤微量元素的变异系数差异较大,分配不均衡,有效Fe、Mn、Zn、Cu均属中等变异程度（10%～100%） ,而有效B属低等变异程度（<10%）.结构分析表明,文登区土壤微量元素含量空间变异具有各向异性, 块金值与基台值的比值均小于25%,具有强烈的空间相关性,说明在该研究区内,受人为因素的影响较小.空间局部差值结果表明,中部低山丘陵区有效Fe 含量较高,中南部边界地带含量最低,且有区域性特征,有效Mn的分布特征与有效Fe有一定的相似性,有效Cu在北部山区、中北部圣经山以及中南部低山丘陵一带较为集中,有效Zn和有效B地域差异不明显,分布较为细碎化.利用地统计学方法分析本区土壤有效态微量元素的空间变异结构,对农业生产合理布局、土壤资源综合治理具有重要意义.
关键词：耕层土壤；微量元素；空间变异；Kriging插值
中图分类号：S158 文献标识号：A 文章编号：1001-4942（2017）07-0081-05
Abstract In this paper, the spatial variability characteristics of available microelements in farmland soils in Wendeng District of Weihai City were studied by means of geostatistics and ArcGIS. The results of statistical analysis showed that the available B, Fe, Mn, Cu and Zn accorded with the logarithmic normal distribution, and the contents of trace elements were all within the normal range, but the total level was lower. The variation coefficients of soil microelements had greater differences and the distribution was not balanced. The available Fe, Mn, Zn and Cu belonged to moderate degree of variation （10%～100%）, while the available B belonged to low degree of variation （<10%）. Structural analysis showed that the spatial variation of trace elements in Wendeng had anisotropy. The ratio of gold value to base value was less than 25%, so there was strong spatial correlation. It indicated that the influence of human factors was smaller in this region. The results of spatial local difference showed that the available Fe content was higher in the middle hilly area of central China, while the lowest in the central and southern regions, which presented regional characteristics. The distribution of available Mn had some similarity to the available Fe. The available Cu mainly concentrated in the northern mountains, the back of the Bible and the middle and south of hilly area. The difference between the available Zn and B was not obvious, and their distribution appeared fragmentation. Using the method of geostatistics to understand the spatial variation structure of soil microelements in this area would be of great significance to rational distribution of agricultural production and comprehensive management of soil resources.
Keywords Plow layer soil； Trace elements； Spatial variability； Kriging interpolation
微量元素是土壤的重要組成成分,是表征土壤质量的重要因子[1],虽然在土壤中含量比较低,但对作物正常生长影响广泛,有重要探究意义.近年来,许多国内外学者对土壤微量元素进行了多方面探究,基于地统计学的内插方法能够更好地反映微量元素的空间分布特征,推动对微量元素空间异质性研究探讨,比如徐尚平等[2]用克里格法分析了内蒙地区土壤微量元素的空间结构,发现母质和以土类为代表的表生地球化学作用是影响分布模式的主要因素.张庆利等[3]对城郊蔬菜基地、赵彦峰等[4]对城乡交错区分析耕层土壤有效微量元素空间分布的影响因素认为,有效锌和有效铜的含量主要受人类活动影响.农业生产中施用的氮、磷肥等将导致土壤-植物系统中微量营养元素的失衡,从而引起微量元素的缺乏[5].
统计学论文参考资料：
结论：基于地统计学耕层土壤有效态微量元素空间变异特征为关于本文可作为相关专业统计学论文写作研究的大学硕士与本科毕业论文统计学就业论文开题报告范文和职称论文参考文献资料。
