鲁中南山区马蹄峪小流域土壤有机质和全氮空间分布特征  

Spatial distribution of soil organic matter and total nitrogen in Matiyu small watershed in hilly area of middle southern Shandong Province

作　　者：耿广坡[1] 高鹏[1] 吕圣桥[1] 张杰[1] 

机构地区：[1]山东农业大学林学院,泰山森林生态站,山东省土壤侵蚀与生态修复重点实验室,山东泰安271018

出　　处：《中国水土保持科学》2011年第6期99-105,共7页Science of Soil and Water Conservation

基　　金：水利部专项基金项目“大黑山流域水土保持生态修复研究”(20080019);黄河三角洲重点实验室开放基金“黄河三角洲滩地不同土地利用方式下土壤水文生态效应”(2008KFJJ06)

摘　　要：以鲁中南山区马蹄峪小流域土壤为对象,综合考虑土地利用和采样点的代表性及可操作性,采集表层(0～20 cm)土壤样品97个,利用回归克里格方法和"3S"技术,分析小流域土壤有机质和全氮的空间分布特征。结果表明:1)马蹄峪小流域表层土壤有机质和全氮质量分数平均值分别为20.45和1.18 g/kg,变异系数分别为27.68%和27.97%,土壤有机质和全氮与环境因子中的高程、坡度、坡向及归一化植被指数相关性较高,而高程及坡向余弦值是回归预测模型所选因子中最优的,从对预测准确性分析来看,回归克里格插值预测结果精度优于普通克里格插值预测结果;2)半方差函数模型中,土壤有机质和全氮质量分数回归值的空间自相关性很强,基台效应值分别为7.3%和17.50%,而土壤有机质和全氮质量分数残差值的空间自相关性为中等,基台效应值分别为33.93%和25.58%;3)土壤有机质和全氮质量分数在空间分布图中均呈现从东南向西北方向逐渐降低的趋势,土壤有机质质量分数在不同土地利用方式下表现为麻栎林地>黑松林地>蔬菜地>玉米地>板栗林地>荒草地的格局,而全氮质量分数则表现出麻栎林地>蔬菜地>黑松林地>玉米地>板栗林地>荒草地的格局,土壤有机质和全氮质量分数在不同高程下整体呈现高程越高,土壤有机质和全氮质量分数越大的趋势,土壤有机质和全氮质量分数在不同坡向下由高到低则均呈现阴坡>半阳坡>阳坡的格局。By analyzing the representativeness and operability of land use and sample points in general,samples from 97 sites（0-20 cm） were collected during October 2010 in Matiyu small watershed in hilly area of middle southern Shandong Province.By employing regression-kriging methods and ＇3S＇ technology,the spatial distribution characteristics of soil organic matter and total nitrogen were studied.Results showed： 1） The average values of surface soil organic matter and total nitrogen mass fraction were 20.45 and 1.18 g/kg respectively,and the coefficients of variation were 27.68% and 27.97% respectively.Environmental factors included elevation,slope,aspect and NDVI had significant correlations with soil organic matter and total nitrogen,and elevation and cosine value of aspect performed the best among the selected factors.Moreover,the prediction accuracy of regression-kriging was better than that of ordinary kriging.2） Semivariogram test showed that both regression values of soil organic matter and total nitrogen had strong spatial autocorrelation with the sill values 7.3% and 17.50% respectively.Both residual values of soil organic matter and total nitrogen had medium spatial autocorrelation with the sill values 33.93% and 25.58% respectively.3） The distribution map of regression-kriging showed that both soil organic matter and total nitrogen mass fraction decreased from the southeast to the northwest,which was similar to the trend of DEM in Matiyu small watershed.The pattern of soil organic matter mass fraction could be ordered as Quercus acutissima plantationPinus thunbergii plantation〉Vegetable field〉Zea mays field〉Castanea mollissima plantation〉Grassland.The soil total nitrogen mass fraction could be ordered as Quercus acutissima plantation〉Vegetable field〉Pinus thunbergii plantation〉Zea mays field〉Castanea mollissima plantation〉Grassland.At different elevations,the higher the elevation,the larger the soil organic matter and total nitrogen mass fraction,while at different aspects,the

关 键 词：有机质 全氮 空间分布 回归克里格 小流域 

分 类 号：S153.621[农业科学—土壤学]