农田土壤有机质和全氮三维空间分布特征研究  

3D Spatial Distribution Characteristics of Soil Organic Matter and Total Nitrogen in Farmland

作　　者：徐丹[1] 刘昌华[1] 蔡太义[1,2] 张世恩[3] 

机构地区：[1]河南理工大学测绘与国土信息工程学院,焦作454000 [2]中国科学院南京土壤研究所,南京210008 [3]郑煤集团芦沟煤矿,郑州452300

出　　处：《农业机械学报》2015年第12期157-163,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(41371133)

摘　　要：以河南省新郑市为研究区,分别采用三维克里格（Kriging）插值法和三维反距离加权（IDW）插值法模拟不同深度土壤有机质和全氮含量的三维空间分布特征,并采用交叉验证法,比较2种三维空间插值方法的预测精度。研究表明,有机质和全氮沿不同土层深度（0~20 cm、20~40 cm、40~60 cm）均表现出明显的空间分布差异,3种深度土壤有机质含量的平均值变化范围为11.31~15.48 g/kg,全氮的变化范围为0.48~0.79 g/kg,均随土层加深而降低;土壤有机质和全氮的三维空间分布表达的信息量更加丰富,可直观展示任意土体切面的养分含量分布信息;通过三维克里格方法得到的有机质插值结果的预测精度高于反距离加权法,全氮亦然,三维克里格插值法更能真实反映土壤养分的三维空间分布特征。The three-dimensional（ 3D） spatial distribution characteristics of farmlands＇ soil organic matter and total nitrogen were revealed in Xinzheng City,and the related technical methods and train of thought were provided. The methods of 3D Kriging interpolation and 3D inverse distance weighted interpolation were comprehensively used to simulate the 3D spatial distribution characteristics of soil organic matter and total nitrogen content in different depths,and their prediction accuracies were compared by using the cross validation method. The results showed that soil organic matter and total nitrogen had significantly different spatial distribution difference along the different soil depths（ 0 ~ 20 cm,20 ~ 40 cm,40 ~ 60 cm）,the mean range of soil organic matter content in three depths varied from 11. 31 g / kg to 15. 48 g / kg,and the mean range of soil total nitrogen content was 0. 48 ~ 0. 79 g / kg,and both of them were decreased with the increase of soil depth. The amount of information that 3D spatial distribution of soil organic matter and total nitrogen expressed was more abundant,which was able to directly show the distribution information of the nutrient content in soil arbitrary section. The prediction accuracy of interpolation results of organic matter obtained through 3D Kriging method was higher than that obtained through inverse distance weighting method,and the result of total nitrogen was the same. 3D Kriging interpolation method could more veritably reflect the 3D spatial distribution characteristics of soil nutrients.

关 键 词：土壤有机质 全氮 三维模拟 空间分布 插值方法 

分 类 号：S153[农业科学—土壤学] S151.9[农业科学—农业基础科学]