不同土地利用对黄土丘陵区小流域土壤微量元素的影响  

The Influence of Land Use on Microelements in Soil of Small Watershed in the Hilly Area of Loess Plateau

作　　者：张宁宁 许佳聪 田仓 严加坤 亢福仁[1,2] ZHANG Ning-ning;XU Jia-cong;TIAN Chang;YAN Jia-kun;KANG Fu-ren(School of Life Sciences,Yulin University,Yulin 719000,China;Shaanxi Key Laboratory of Ecological Restoration in Northwest Shaanxi Mining Area, Yulin University, Yulin 719000, China)

机构地区：[1]榆林学院生命科学学院,陕西榆林719000 [2]陕西省陕北矿区生态修复重点实验室,陕西榆林719000

出　　处：《榆林学院学报》2022年第2期19-24,共6页Journal of Yulin University

基　　金：陕西省教育厅科研计划项目专项项目(19JK1000);榆林学院高层次人才引进博士科研启动基金(17GK18,17GK19)。

摘　　要：为了更好地掌握黄土高原小流域退耕还林以后土壤微量元素分布状况以及土地利用方式对土壤微量元素分布的影响情况,选择典型小流域不同土地利用方式的土壤为研究对象,研究土壤中四种微量元素(Mn、Fe、Cu、Zn)的分布特征,结果显示:(1)土壤中Fe元素的含量明显高于其它的微量元素,Zn含量次之,Mn和Cu的含量相对较少。Fe元素与Cu和Zn元素之间呈极显著相关关系,但Mn元素与其它三种元素之间的相关关系不显著。(2)土地利用方式显著影响了四种元素在研究小流域的分布特征。其中,Mn元素的分布状况是林地>坡耕地>灌木>苹果园>沟道>草地,Fe元素的分布状况是沟道>苹果园>灌木>林地>坡耕地>草地,Cu元素的分布状况是沟道>苹果园>灌木>林地>草地>坡耕地,Zn元素的分布状况是沟道>灌木>林地>苹果园>坡耕地>草地。In order to better understand the distribution of microelements in soil of small watershed and the influence of land use on it in the hilly area since the implementation of the project of“Green for Grain”in the Loess Plateau,the distribution characteristics of four microelements(Mn,Fe,Cu,Zn)in soils with different land use patterns in typical small watershed are studied.The results show that(1)the content of Fe in soil is obviously higher than that of the others,Zn content in the second,Mn and Cu content are relatively low.The correlation between Fe,Cu and Zn is very significant,but the correlation between Mn and the other three elements is not significant.(2)land use patterns significantly affect the distribution characteristics of the four elements in the small watershed.The distribution of Mn is woodland>slope cropland>shrub>Apple orchard>gully>grassland,that of Fe is gully>apple orchard>shrub>woodland>slope cropland>grassland,that of Cu is gully>apple orchard>shrub>woodland>grassland>slope cropland,and that of Zn is gully>shrub>woodland>apple orchard>slope cropland>grassland.

关 键 词：小流域 黄土高原 土地利用方式 微量元素 

分 类 号：S157.2[农业科学—土壤学]