贵州省湄潭县农用地表层土壤地球化学特征及成因分析  

Geochemical characteristics and genetic analysis of agricultural surface soil in Meitan County, Guizhou Province

作　　者：郭宇 罗永双 张坤林 季国松[1] GUO Yu;LUO Yongshuang;ZHANG Kunlin;JI Guosong(Geological Party,Guizhou Bureau of Geology and Mineral Exploration and Development,Zunyi 563003,Guizhou,China)

机构地区：[1]贵州省地矿局102地质大队,贵州遵义563003

出　　处：《矿产勘查》2023年第2期310-316,共7页Mineral Exploration

基　　金：贵州省自然资源厅项目(黔地矿耕调:2017-24);贵州省地质矿产勘查开发局地质科研项目(黔地矿科合(2020)34号)联合资助。

摘　　要：本文基于湄潭县农用地表层土壤地球化学数据,运用数据统计分析及因子分析等方法,获得研究区农用地表层土壤23种元素(指标)地球化学背景值、分布特征以及成因。研究区表层土壤整体偏酸性,常量营养元素呈富氮、缺钾的特点,硒元素含量较高,富硒土壤分布广泛,为区内发展富硒特色农业提供了基础保障。采用因子分析法提取了8个因子,可以反映研究区农用地表层土壤75.671%特征成因。影响其地球化学特征的主要因素有地质背景、成土母质、植物根系富集、矿产生产活动、人工施肥、大气降雨等因素。研究结果可以为当地农业发展、土地规划、配方施肥、土壤环境保护提供一定参考。In this paper, the geochemical background values, distribution characteristics and causes of 23 elements(indexes) in agricultural surface soil in Meitan County are obtained by using 6519 pieces of agricultural surface soil geochemical data obtained from 1∶50000 cultivated land quality geochemical survey, sampling data statistical analysis and factor analysis. The surface soil in the study area is generally acidic, and the major nutrient elements are rich in nitrogen and lack of potassium. The content of Se element in the area is high and selenium rich soil is widely distributed, which provides a basic guarantee for the development of selenium rich characteristic agriculture in the area. Eight factors are extracted by factor analysis, which can reflect 75.671% of the characteristic causes of the study area. The main factors affecting the soil geochemical characteristics of agricultural surface layer in the study area include geological background, soil forming parent material, plant root enrichment, mineral production activities, artificial fertilization, atmospheric rainfall and so on. The results can provide reference for local agricultural development, land planning, formula fertilization and soil environmental protection.

关 键 词：表层土壤 地球化学特征 硒 成土母岩 因子分析 湄潭县 贵州省 

分 类 号：P632[天文地球—地质矿产勘探]