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江汉平原典型县域土壤养分空间分布研究

发表时间:2011-10-15  浏览量:1435  下载量:661
全部作者: 杨勇,贺立源,张楚天
作者单位: 华中农业大学资源与环境学院
摘 要: 以位于江汉平原西北腹地的沙洋县区域为研究对象,利用GPS定位,2007年秋在该县主要农业用地采集土样657个,分析有机质、全氮、有效磷和速效钾的含量,应用传统统计学和地统计方法对数据进行分析。结果表明:研究区域土壤肥力中等偏上,通过半方差函数分析,土壤有机质、全氮、有效磷存在中等空间相关性,速效钾空间相关性较弱。通过克里格(Kriging)插值,制作该县土壤主要养分空间分布图,结果表明:区域内有机质和全氮有一定的相关性,呈大斑块分布;而有效磷和速效钾趋向于中小斑块变异,空间分布较破碎。
关 键 词: 土壤地理学;土壤养分;空间分布;江汉平原;克里格
Title: Study on spatial distribution of soil nutrients characteristics of typical county in Jianghan plain
Author: YANG Yong, HE Liyuan, ZHANG Chutian
Organization: College of Resources and Environment, Huazhong Agricultural University
Abstract: 657 soil samples (GPS used for recording sample location) were collected in Shayang county located in the hinterland of northwest Jianghan plain in 2007. Organic matter (OM), total nitrogen (TN), available phosphorus (AP) and available potassium (AK) contents were measured. The spatial pattern of the data was analyzed using both traditional descriptive statistics and geo-statistics. The semi-variogram of geostatistics analysis indicated OM, TN and AP had moderate spatial autocorrelations, but AK had weak spatial autocorrelations. Maps of spatial distribution of soil nutrients were produced using kriging interpolation method. The result indicated OM and TN in the region had some relevance characterized by large-patch distribution. However, AP and AK were characterized by small and medium patch distribution.
Key words: pedogeography; soil nutrients; spatial distribution; Jianghan plain; Kriging
发表期数: 2011年10月第19期
引用格式: 杨勇,贺立源,张楚天. 江汉平原典型县域土壤养分空间分布研究[J]. 中国科技论文在线精品论文,2011,4(19):1714-1719.
 
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