河北省吴桥县土壤微量元素空间分布特征  

Spatial distribution characteristics of soil microelements in Wuqiao County of Hebei Province

作　　者：范文杰[1,2] 张洪江[1] 程金花[1] 姚晶晶[1] 

机构地区：[1]北京林业大学水土保持与荒漠化防治教育部重点实验室,北京100083 [2]河北省林业厅,石家庄050001

出　　处：《中国水土保持科学》2015年第1期91-95,共5页Science of Soil and Water Conservation

摘　　要：为揭示土壤微量元素在空间上的分布,更好地指导农田培肥管理,以河北省吴桥县4 965份土壤样品为研究对象,利用地统计学与GIS相结合的方法,分析土壤有效铁、有效铜、有效锰、有效锌等土壤养分质量分数的空间分布特征。结果表明：1）吴桥县土壤有效铁、有效锰、有效铜及有效锌平均质量分数分别为11.54、11.84、1.30和0.97 mg/kg。2）通过半方差函数相关参数分析,土壤耕层中有效铁和有效铜的空间自相关范围较大,变程分别为879和660 m;耕层有效锌和有效锰的变程较小,分别为33和36 m。3）4种有效微量元素的变程大小顺序为有效铁〉有效铜〉有效锰〉有效锌。4）4种微量元素变异函数的理论模型符合指数模型,有效铁和有效铜的块基比在25%-75%之间,具有中等的空间相关性;有效锰和有效锌的块基比〉75%,系统空间相关性很弱。通过普通克里格插值所得的空间分布图能很好地反映土壤微量元素的空间分布特征,经检验插值精度较高。In order to reveal the spatial distribution of soil available microelements,and to better guide fertilizer management,4965 soil samples were collected from Wuqiao County of Hebei Province as the research object. By using the geostatistics method combined with GIS,spatial distribution characteristics of the mass fraction of effective Cu,Fe,Mn and Zn were studied. The results showed that the mass fractions of effective Cu,Fe,Mn and Zn were 11. 54,11. 84,1. 30 and 0. 97 mg / kg,respectively. The result of relevant parameters of semivariance analysis showed that the spatial autocorrelation ranges of effective Fe and Cu were larger in topsoil,while those of effective Zn and Mn were smaller in topsoil. The heterogeneity ranges of effective Fe and Cu were 879 and 660 m,respectively,while those of effective Zn and Mn were 33 and 36 m,respectively. The range of available microelements followed the order of effective Fe 〉effective Cu 〉effective Mn〉 effective Zn. Theoretical semivariogram models of four kinds of microelements conformed to exponential model. The ratios of nugget and sill of effective Cu and Fe ranged between 25% and 75%,which showed a moderate spatial correlation. The ratios of nugget and sill of effective Mn and Zn were higher than 75%,showing a weak spatial correlation. The spatial distribution maps by ordinary kriging interpolation can well reflect the spatial variability of soil microelements,and the accuracy of interpolation was relatively higher by testing.

关 键 词：土壤 地统计 微量元素 空间分布 克里格插值 

分 类 号：S158[农业科学—土壤学]