作者：汪璇,王成秋,唐将,魏朝富,谢德体
作者单位：西南大学资源环境学院,中国农业科学院柑桔研究所,重庆市地勘局川东南地质大队
摘要：三峡库区优势农产品种植规划需要建立在查清区域土壤营养元素背景值及分布特征的基础之上,本文在地理信息系统(GIS)支持下,运用地统计学方法对三峡库区表层土壤中B、Cu、Cl、TFe2O3、Mn、Mo、Zn等微量营养元素背景值的空间变异特征进行了研究和分析。结果表明:研究区域土壤微量营养元素中,TFe2O3为正态分布,其它均为偏态分布;在经过不同趋势阶数元素插值误差的综合比较基础上,确定B、Cu、TFe2O3、Mn、Zn的趋势效应参数宜选取二阶,Cl及Mo的趋势效应参数宜选取无阶;B、Cu、TFe2O3、Mn、Mo、Zn元素在0°、45°、90°、135°四个方向上的变异程度接近,但具有不同的变程,Cl在4个方向上变异程度保持一致,具有明显的各向同性特征;研究区7种土壤微量营养元素中B、Cu、TFe2O3、Mn和Mo空间自相关性中等,而Cl和Zn的空间相关性较弱;总体上,B、Cu、Tfe2O3、Mn、Mo和Zn变化从东到西、从东北到西南呈逐渐递减的趋势,高值主要集中分布在东北部巫山、奉节和西南涪陵区域,Cl的空间分布则没有明显的规律性。研究结果可为三峡移民工程中农业结构调整、优势农产品规划提供决策和数据支持。
关键词：地统计学,GIS,微量营养元素,空间变异,三峡库区
Title: Geostatistics and GIS-based Spatial Distribution of Microelements in the Three Gorges Reservoir Area
Authors: WANG Xuan, WANG Chen-qiu , TANG Jiang , WEI Cao-fu, XIE De-ti
Abstract: In this paper, spatial patterns of soil micrelements were studied in Three Gorege Reservior Area.Results showed that TFe2O3 took on normal distribution while the others were subjected to Asymmetric distribution.The integrative comparisons of semivariogram parameters with different trends of the kriging prediction errors of elements indicated that the 2-order trend effect was preferable for B, Cu, TFe2O3, Mn and Zn ,while none trend effect was preferable for Cl and Mo.Spatial variation of B, Cu, TFe2O3, Mn, Mo and Zn was similar in four directions but with different ranges, and Cl was homorogeneous in all directions.B, Cu, Tfe2O3, Mn and Zn were characterized by medium spatial correlation, while the others by weak one.These microelements showed that the trend decreased from east to west, from northeast to southwest, and the higher contents were found in northeast Wushan county, Fengjie county and southwest Fuling country.And no any trend could be found for Cl spatial distribution
Key words: Geostastics； GIS； Micrelement； Spatial distribution； Three Gorege Reservior Area；
文献注录：汪璇,王成秋,唐将,魏朝富,谢德体. 基于地统计学和GIS的三峡库区土壤微量营养元素空间变异性研究 [J]. 土壤通报. 2009, 02: 359-365.
基金: 重庆市科委项目(8021)资助
报/刊名：《土壤通报》，发表于2009 / 第 02 期。
文献类型： [J]
页码：第 359-365 页 / 共7 页