尧都区西南部褐土耕层土壤养分的空间分布特征  

Spatial distribution of soil nutrients in cinnamon soil arable layer in southwest of Yaodu district

作　　者：孟阳阳 张永清 周进财[4] 刘冰[1] MENG Yang-yang;ZHANG Yong-qing;ZHOU Jin-cai;LIU Bing(Linze Inland River Basin Research Station,Chinese Ecosystem Network Research,Key Laboratory of Ecohydrology of Inland River Basin,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Geography Science,Shanxi Normal University,Linfen 041004,China;College of Life Science,Shanxi Normal University,Linfen 041004,China)

机构地区：[1]中国生态系统研究网络临泽内陆河流域研究站,中国科学院内陆河流域生态水文重点实验室,中国科学院西北生态环境资源研究院,甘肃兰州730000 [2]中国科学院大学,北京100049 [3]山西师范大学地理科学学院,山西临汾041004 [4]山西师范大学生命科学学院,山西临汾041004

出　　处：《甘肃农业大学学报》2018年第1期102-109,共8页Journal of Gansu Agricultural University

基　　金：国家自然科学基金面上项目(30871483);国家自然科学基金面上项目(41471024).

摘　　要：【目的】为探讨褐土耕层土壤养分的空间分布特征及其变异规律.【方法】以临汾市尧都区为研究区,应用地统计学、克里格插值法和地理探测器等方法,研究褐土耕层有机质、全氮、水解氮、有效磷和速效钾等土壤养分要素的空间分布特征及其影响因素.【结果】褐土耕层土壤有机质、全氮、水解氮、有效磷和速效钾均服从对数正态分布,平均含量分别为12.34g/kg,1.15g/kg,53.54mg/kg,23.45mg/kg和229.58mg/kg,变异系数在38.36%~85.40%之间,均呈中等变异强度.【结论】有机质与全氮的空间变异主要受结构性因素影响,而速效养分主要受随机因素影响;速效钾表现为单一斑块,其他养分均呈从两边区域向中间区域逐渐增加的趋势.人为管理措施对速效养分格局起主导作用,成土母质和灌溉水源条件是影响有机质和全氮分布的主要因素.此外,灌溉水源条件对各养分影响均较大,土壤质地的影响均较小.【Objective】The aim was to study the spatial distribution and variation pattern of soil nutrients in cinnamon soil,and provide theoretical basis for the precision management and sustainable development of soil fertility.【Method】Geostatistical methods,the ordinary Kriging interpolation method in ArcGIS,and geographical detector were ued to analyze the spatial distribution and the influencing factors for soil organic matter(SOM),total nitrogen(TN),alkali-hydrolyzable nitrogen(AN),available phosphorus(AP)and available potassium(AK)in cinnamon soil arable layer at Yaodu district of Shanxi province.【Result】SOM,TN,AN,AP and AK all obeyed logarithmic normal distribution with the average content of12.34g/kg,1.15g/kg,53.54mg/kg,23.45mg/kg and229.58mg/kg,respectively,and the variation coefficients ranged from38.36%to85.40%being at moderate variation intensity.【Conclusion】The spatial variation of SOM and AN were mainly affected by structural factors,while the spatial variation of available nutrients were mainly affected by random factors,AK appeared single patch,and other nutrients took the increasing trend from the two sides to the middle area.Human management measures played dominant role in the distribution pattern of available nutrients.Soil parent material and sources of irrigation water had an important impact on distribution of SOM and TN.In addition,the effect of sources of irrigation water was large to soil nutrients and the influence of soil texture was small.

关 键 词：褐土 土壤养分 空间格局 克里格插值 尧都区 

分 类 号：S152.7[农业科学—土壤学]