首页|期刊导航|中国农业科学（英文版）|Preliminary Study on Spatial Variability and Distribution of Soil Available Microelements in Pinggu County, Beijing, China
中国农业科学（英文版）2008，Vol.7Issue(10)：1235-1244,10.
Preliminary Study on Spatial Variability and Distribution of Soil Available Microelements in Pinggu County, Beijing, China
Preliminary Study on Spatial Variability and Distribution of Soil Available Microelements in Pinggu County, Beijing, China
摘要
Abstract
The objectives of this study were to explore the spatial distribution of soil available microelements and to provide a firm foundation for scientifically formulated fertilizer. 1076 soil samples were collected from Pinggu County of Beijing, China, and the contents of available Cu, Zn, Fe, and Mn in topsoil (0-20 cm) and subsoil (20-40 cm) were analyzed respectively. Descriptive statistics and geostatistics were used to analyze the data. The mean values of topsoil available Cu, Zn, Fe, and Mn were 1.96, 2.51,17.32, and 10.91 mg kg-', respectively, which were at medium or at slightly above medium level. The topsoil content of the soil available microelements was more than that of subsoil. The result of semivariance analysis showed that the topsoil available Fe and Mn were spatially correlated at a larger distance of 21.6 and 45.3 km, and the available Cu and Zn were at a shorter distance of 3.1 and 2.9 km, respectively. The subsoil spatial correlation distances were obviously different from the topsoil, which were in the order of available Mn>Cu>Zn = Fe. The Kriging method was applied to calculate the unobserved points and was used to generate the contour map. The results showed that the structural factors, such as topology, soil types, and soil properties, were the main factors influencing the spatial distribution of topsoil available Fe and Mn. Topsoil available Cu and Zn contents were mainly affected by land use, and their contents in orchard and in vegetable land were greatly higher than in field. The spatial distribution of subsoil microelements was similar to that of the topsoil, which exhibited vertical distribution patterns. Fertilizer and pesticide application resulted in the higher contents of available Cu and Zn in Pinggu County. The higher content of available Zn is potentially harmful to soil environmental quality, which should be inspected.关键词
soil available microelements/semivariance/spatial variabilityKey words
soil available microelements/semivariance/spatial variability分类
农业科技引用本文复制引用
WANG Shu-ying,YU Tong-quan,WANG Jian-li,YANG Liu,YANG Kai,LU Ping..Preliminary Study on Spatial Variability and Distribution of Soil Available Microelements in Pinggu County, Beijing, China[J].中国农业科学（英文版）,2008,7(10):1235-1244,10.基金项目
This paper is translated from its Chinese version in Scientia Agricultura Sinica. The work was supported by Beijing Educatinal Com-mittee Technological Development Program Key Item (KM-200510020006). （KM-200510020006）
