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| 重庆三峡库区耕地土壤重金属含量的空间变异性研究 | |
| 引用本文： | 杨 梅,刘洪斌,武 伟.重庆三峡库区耕地土壤重金属含量的空间变异性研究[J].中国生态农业学报,2006,14(1):100-103. |
| 作者姓名： | 杨 梅 刘洪斌 武 伟 |
| 作者单位： | 1. 四川农业大学都江堰分校信息工程系,都江堰,611830 2. 中国科学院地球化学研究所,贵阳,550005 3. 西南农业大学信息学院,重庆,400716 |
| 摘 要： | 对重庆三峡库区耕地土壤重金属含量的空间变异性研究结果表明,Hg和Cr服从对数正态分布,拟合得到Hg与Cr的半方差函数模型分别为幂函数和球状模型,且在一定范围内存在空间相关性;采用Kriging内插法对未测点重金属进行最优估计,所绘制的Kriging插值图反映了该区耕地土壤重金属Hg和Cr的空间变异特征。 |
| 关 键 词： | 重金属 空间变异 半方差函数模型 克里格插值 |
| 收稿时间： | 2004-08-31 |
| 修稿时间： | 2004-10-12 |
Spatial variability of heavy metals in soil of Three-Gorges Reservior in Chongqing |
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| YANG Mei,LIU Hong-Bin and WU Wei.Spatial variability of heavy metals in soil of Three-Gorges Reservior in Chongqing[J].Chinese Journal of Eco-Agriculture,2006,14(1):100-103. | |
| Authors: | YANG Mei LIU Hong-Bin and WU Wei |
| Institution: | 1.Department of Information Technology, Siehuan Agricultural University Dujiangyan Campus, Dujiangyan 611830,China;2.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550005, China;3.College of Information, Southwest Agricultural University, Chongqing 400716, China |
| Abstract: | The spatial variability of heavy metals in soil of Three-Gorges Reservior in Chongqing was studied.The results show that the Hg and Cr of soil heavy(metal) are distributed lognormally.The semivariogram models of Hg and Cr are(power) and spherical.These observed(items) are correlated in a given (spatial)(range.) The kriging method is applied to(estimate) the unobserved points and their(group) maps are obtained.The spatial variabilities of the heavy metals in(Chongqing) can be reflected clearly in the maps. |
| Keywords: | Heavy metal Spatial variability Semivariance model Kriging |
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