基于时空特征的土壤养分变异分析研究——以陕西省陈仓区为例  

Analysis of Variation in Soil Nutrients Based on Temporal-Spatial Characteristic——Taking Example for Chencang District in Shaanxi Province

作　　者：舒彦军[1] 张立亭[1] 

机构地区：[1]东华理工大学测绘工程学院,江西抚州344000

出　　处：《江西农业学报》2011年第6期93-96,100,共5页Acta Agriculturae Jiangxi

基　　金：国家自然科学基金(408740104;0940011);江西省自然科学基金(2008GQC0001);江西省教育厅科技重点项目(GJJ10022)

摘　　要：为了从时间和空间两个角度分析土壤养分的时空变异情况,便于日后科学地制定土地利用总体规划,本文运用ArcGIS的地统计、3D分析和分析模块,研究了陕西省陈仓区1980年和2003年土壤有机质和碱解氮的分布和变化趋势。研究结果表明:在时间特征上,有机质整体呈下降趋势,碱解氮整体呈上升趋势,这与多种自然和人为因素有关。在空间特征上,低于600 m和高于1500 m高程带有机质以6等级为主,碱解氮以4等级为主;600～1000 m高程带和1000～1500 m高程带有机质以6等级为主,碱解氮以5等级为主。各主要等级的面积的空间分布,在高程带中的排序都为:1000～1500 m>600～1000 m>(>1500 m)>(<600 m),这与多种地貌并存和气候有关。In order to analyze the temporal and spatial variation in soil nutrients,and provide scientific reference for drafting the general plan of land use,the geostatistical analysis of ArcGIS,three-dimensional analysis,and analysis model were applied to study the distribution and variation trend of the organic matter and alkali-hydrolysable nitrogen content in the soil of Chencang district of Shaanxi province in 1980 and 2003.The results indicated that： on the temporal variation,the content of soil organic matter showed a decreasing trend as a whole,while the content of alkali-hydrolysable nitrogen revealed an increasing trend in general,which were related to many natural factors and human factors.On the spatial variation,in the altitudinal zone below 600 m and above 1500 m,the organic matter content was mainly in grade six,and alkali-hydrolysable nitrogen content was mainly in grade four;in the altitudinal zone of 600-1000 m and 1000-1500 m,the organic matter content was mainly in grade six,and alkali-hydrolysable nitrogen content was mainly in grade five.Because of the influence caused by many landforms and climate,all the order in altitudinal zone by the area of every dominating grade was as follows： 1000-1500 m〉 600-1000 m 〉above 1500 m 〉below 600 m.

关 键 词：土壤养分 时空特征 ARCGIS 普通克里格 

分 类 号：S159.2[农业科学—土壤学]